ArticlePDF Available

A comparative phenotypic and genomic analysis of C57BL/6J and C57BL/6N mouse strains

Authors:

Abstract and Figures

The mouse inbred line C57BL/6J is widely used in mouse genetics and its genome has been incorporated into many genetic reference populations. More recently large initiatives such as The International Knockout Mouse Consortium (IKMC) are using the C57BL/6N mouse strain to generate null alleles for all mouse genes. Hence both strains are now widely used in mouse genetics studies. Here we perform a comprehensive genomic and phenotypic analysis of the two strains to identify differences that may influence their underlying genetic mechanisms. We undertake genome sequence comparisons of C57BL/6J and C57BL/6N to identify SNPs, indels and structural variants, with a focus on identifying all coding variants. We annotate 34 SNPs and 2 indels that distinguish C57BL/6J and C57BL/6N coding sequences, as well as 15 structural variants that overlap a gene. In parallel we assess the comparative phenotypes of the two inbred lines utilizing the EMPReSSslim phenotyping pipeline, a broad based assessment encompassing diverse biological systems. We perform additional secondary phenotyping assessments to explore other phenotype domains and to elaborate phenotype differences identified in the primary assessment. We uncover significant phenotypic differences between the two lines, replicated across multiple centers, in a number of physiological, biochemical and behavioral systems. Comparison of C57BL/6J and C57BL/6N demonstrates a range of phenotypic differences that have the potential to impact upon penetrance and expressivity of mutational effects in these strains. Moreover, the sequence variants we identify provide a set of candidate genes for the phenotypic differences observed between the two strains.
Content may be subject to copyright.
This Provisional PDF corresponds to the article as it appeared upon acceptance. Copyedited and
fully formatted PDF and full text (HTML) versions will be made available soon.
A comparative phenotypic and genomic analysis of C57BL/6J and C57BL/6N
mouse strains
Genome Biology 2013, 14:R82 doi:10.1186/gb-2013-14-7-r82
Michelle M Simon (m.simon@har.mrc.ac.uk)
Simon Greenaway (s.greenaway@har.mrc.ac.uk)
Jacqueline K White (jkw@sanger.ac.uk)
Helmut Fuchs (hfuchs@helmholtz-muenchen.de)
Valérie Gailus-Durner (gailus@helmholtz-muenchen.de)
Tania Sorg (tsorg@igbmc.fr)
Kim Wong (kw10@sanger.ac.uk)
Elodie Bedu (bedu@igbmc.fr)
Elizabeth J Cartwright (elizabeth.j.cartwright@manchester.ac.uk)
Romain Dacquin (romain.dacquin@etu.univ-lyon1.fr)
Sophia Djebali (sophia.djebali@inserm.fr)
Jeanne Estabel (je2@sanger.ac.uk)
Jochen Graw (graw@helmholtz-muenchen.de)
Neil J Ingham (neil.ingham@kcl.ac.uk)
Ian J Jackson (ian.jackson@igmm.ed.ac.uk)
Andreas Lengeling (andreas.lengeling@roslin.ed.ac.uk)
Silvia Mandillo (smandillo@ibc.cnr.it)
Jacqueline Marvel (jacqueline.marvel@inserm.fr)
Hamid Meziane (meziane@igbmc.fr)
Frédéric Preitner (Frederic.Preitner@unil.ch)
Oliver Puk (oliver.puk@helmholtz-muenchen.de)
Michel Roux (mjroux@igbmc.fr)
David J Adams (da1@sanger.ac.uk)
Sarah Atkins (s.atkins@har.mrc.ac.uk)
Abdel Ayadi (ayadi@igbmc.fr)
Lore Becker (lore.becker@helmholtz-muenchen.de)
Andrew Blake (a.blake@har.mrc.ac.uk)
Debra Brooker (d.brooker@har.mrc.ac.uk)
Heather Cater (h.cater@har.mrc.ac.uk)
Marie-France Champy (champy@igbmc.fr)
Roy Combe (combe@igbmc.fr)
Petr Danecek (pd3@sanger.ac.uk)
Armida di Fenza (a.difenza@har.mrc.ac.uk)
Hilary Gates (h.gates@har.mrc.ac.uk)
Anna-Karin Gerdin (akg@sanger.ac.uk)
Elisabetta Golini (egolini@ibc.cnr.it)
John M Hancock (jmhancock@gmail.com)
Wolfgang Hans (wolfgang.hans@helmholtz-muenchen.de)
Sabine M Hölter (hoelter@helmholtz-muenchen.de)
Genome Biology
© 2013 Simon et al.
This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0),
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Tertius Hough (t.hough@har.mrc.ac.uk)
Pierre Jurdic (pjurdic@ens-lyon.fr)
Thomas M Keane (tk2@sanger.ac.uk)
Hugh Morgan (h.morgan@har.mrc.ac.uk)
Werner Müller (werner.muller@manchester.ac.uk)
Frauke Neff (frauke.neff@helmholtz-muenchen.de)
George Nicholson (george.nicholson@stats.ox.ac.uk)
Bastian Pasche (Bastian.Pasche@helmholtz-hzi.de)
Laura-Anne Roberson (lr4@sanger.ac.uk)
Jan Rozman (jan.rozman@helmholtz-muenchen.de)
Mark Sanderson (ms14@sanger.ac.uk)
Luis Santos (l.santos@har.mrc.ac.uk)
Mohammed Selloum (selloum@igbmc.fr)
Carl Shannon (cs7@sanger.ac.uk)
Anne Southwell (a.southwell@har.mrc.ac.uk)
Glauco P Tocchini-Valentini (tocchini@ibc.cnr.it)
Valerie E Vancollie (vv2@sanger.ac.uk)
Sara Wells (s.wells@har.mr.ac.uk)
Henrik Westerberg (h.westerberg@har.mrc.ac.uk)
Wolfgang Wurst (wurst@helmholtz-muenchen.de)
Min Zi (min.zi@manchester.ac.uk)
Binnaz Yalcin (Binnaz.Yalcin@well.ox.ac.uk)
Ramiro Ramirez-Solis (rrs@sanger.ac.uk)
Karen P Steel (karen.steel@kcl.ac.uk)
Ann-Marie Mallon (a.mallon@har.mrc.ac.uk)
Martin Hrabě de Angelis (hrabe@helmholtz-muenchen.de)
Yann Herault (herault@igbmc.fr)
Steve DM Brown (s.brown@har.mrc.ac.uk)
ISSN 1465-6906
Article type Research
Submission date 18 March 2013
Acceptance date 28 June 2013
Publication date 31 July 2013
Article URL http://genomebiology.com/2013/14/7/R82
This peer-reviewed article can be downloaded, printed and distributed freely for any purposes (see
copyright notice below).
Articles in Genome Biology are listed in PubMed and archived at PubMed Central.
Genome Biology
© 2013 Simon et al.
This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0),
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
For information about publishing your research in Genome Biology go to
http://genomebiology.com/authors/instructions/
Genome Biology
© 2013 Simon et al.
This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0),
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
1
A comparative phenotypic and genomic analysis of
C57BL/6J and C57BL/6N mouse strains
Michelle M Simon
1
, Simon Greenaway
1
, Jacqueline K White
2
, Helmut Fuchs
3a
,
Valérie Gailus-Durner
3a
, Tania Sorg
4
, Kim Wong
2
, Elodie Bedu
4
, Elizabeth J
Cartwright
5a
, Romain Dacquin
6
, Sophia Djebali
7
, Jeanne Estabel
2
, Jochen
Graw
3b
, Neil J Ingham
2
, Ian J Jackson
8
, Andreas Lengeling
9
, Silvia
Mandillo
10
, Jacqueline Marvel
6
, Hamid Meziane
4
, Frédéric Preitner
11
, Oliver
Puk
3b
, Michel Roux
4
, David J Adams
2
, Sarah Atkins
1
, Abdel Ayadi
4
, Lore
Becker
3a
, Andrew Blake
1
, Debra Brooker
1
, Heather Cater
1
, Marie-France
Champy
4
, Roy Combe
4
, Petr Danecek
2
, Armida di Fenza
1
, Hilary Gates, Anna-
Karin Gerdin
2
, Elisabetta Golini
10
, John M Hancock
1
, Wolfgang Hans
3a
, Sabine
M Hölter
3a
, Tertius Hough
1
, Pierre Jurdic
6
, Thomas M Keane
2
, Hugh Morgan
1
,
Werner Müller
5b
, Frauke Neff
3c
, George Nicholson
1
, Bastian Pasche
12
, Laura-
Anne Roberson
2
, Jan Rozman
3a
, Mark Sanderson
2
, Luis Santos
1
, Mohammed
Selloum
4
, Carl Shannon
2
, Anne Southwell
1
,Glauco P Tocchini-Valentini
10
,
Valerie E Vancollie
2
, Sara Wells
1
, Henrik Westerberg
1
, Wolfgang
Wurst
3b,15,16,17
, Min Zi
5a
, Binnaz Yalcin
13, 14
, Ramiro Ramirez-Solis
2
, Karen P
Steel
2
, Ann-Marie Mallon
1
, Martin Hrabě de Angelis
3a
, Yann Herault
4
and
Steve DM Brown
1
*

 !"#
$
%&%'(&%)*!+
#
,
-./012(0
1)34'56789
,4
-./012(0
"234'56789
,
-./012(0
:'34'56789
9
(;(<(:13(3(11*(*3(31
=879!9(>?00)=
6
=020)0
3,@:%#
64
=0020)03,@:%#
8
(A;=,$?,9+2%8@!!7
=
7
13A6!+2%8@!!7=
5
(2014'&
14'19$ #
@
(0("2%(2014'1*
B14'1$6@#
!
'3-?*'34'(B1C,$
!!!6(

"0(0-0(0*'
,5$9
$
4=020
('220!6-
,
(0*'879!9(>=
9
0('220?!6-
6
0"2%2D/+C$
5!,,,
2
8
):>(0:#$5!5!9
7
".0/3'21>>'995!,,8

* '+E2"CC*?C4FCCC>
1E
C?CFCCC>G?C'FCCC>G
H;#C&?I>F'CC>G=?0F-?CG
BA?"?'F-?CG%'?'F'4C0G#
&'?>!F'CC>G1*?4F'4C0G1-4HC'?
-4CIC'FCC>G";?C;FC2?
C0G"I4?CI4FC0GH14?I$F'CC>GH
?'F-?CG3HC('?C'F>CC>G(HCH>?
CI>F'CCC>G+''?C''FCCC>G2
?F4CCGH;2?H;C2FC0G
-?-F'4C0G=AA:?=C:FCG2:>?
2C>F-?CG)?I)F'4C0G"2HC+?
F'CC>G+>?C>FCCC>G+4+?F'4C0G
*>?C4>F-?CG+*>?C4>FCCC>G"4
*>?C4>FCCC>G?CFCCC>G?=
?F'4C0G4?4F'4C0G:">?,F'CC>G
+=-?C0-FCCC>G?C'FCCC>G+?#
?>'F'CC>G14?'F4CCGHC>?
I>F'CG&0''?&0''CF-?CG4C
J?F-?CG%'?C'FCCC>G:
H?IF?C0G%C#?>$F'CC>G''?
C'FCCC>G&/?CFCC>G=>300?
=>C00F-?CG'3?'CFC)CC>G
*:?*C:F-?-CG?+4?9F'CC>G
H-?IC-F-?CG>?9F'CC>G
?CFCCC>G?F'4C0G?
7F'CC>G:C%?B?F4CCGB1CB?
22$F'CC>G&?CFCCC>G>&4'?
C4'FCCC>G&0''&?F-?CG.?
C-FCC>G*-K?*-CKFC)CC>G-??
F'CC>G#:C?#CF>CC>G+??
CFCCC>G4L+'?4F-?CGK
?F'4C0G2"CC*?C4FCCC>M
3
Abstract
Background
%467*<8H''
4'0C'
2%(#>(#'
67*<83'0'C4
'C0
2'00
000''C
Results
&>';067*<8H67*<830
3:200''2C
&,93:$'67*<8H67*<83'
;622'C(
204-'
1:'44'2
4'C&0'
)4000
C&2'0004
40'
442C
Conclusions
067*<8H67*<83'0
002)20
00C2;20
20'000424
C
Keywords: 4G;2G'G'
>>?G67*<8
4
Background
%20241
4(#>(#NO
00'C%1
2406!!!'2'2
'00'04;
C%(#4'4(
:'(:2)02'
44'6!!!0
20'0N$OC
+(#24''67*<831NOC
2'0(#0(:'
467*<83''4>'C
%067*<830I0''4'
2'467*<834
2400'C(
440'242
'67*<8H'200
44N,9ON6O'>N8O
42N7OC2'402
4067*<8H4>'C+;67*<8H
200;0'
N5@OC%'0'043H4'
44'
44'
00'0'C
5
%467*<84H>40
67*@95=$9C(@6=,$
3(03('67*<83C%
67*<8344=60'00
67*<83%=@@N!OC%67*<8H
67*<83240$$!'C10
'2467*<8H67*<834'09$7
3:0$3:!C5P4N>CO
0''C
($!)20'274'
)'402'68C7'
3:5C5!C$52B
44?2NOC(
;20
24C(2
''40;2'
04NOC00Q%04
0'2>40
2C('00Q%)42C
200Q%02'00
'00'2'0;0B
C+'20B'
I00>B
'2'0''0NOC%>
6
0'''2
-'400C
&0'0
67*<8367*<8H'''00
C&)004
';C('?';0
67*<8H'4*20
'?;02'3:B'
67*<8367*<8H0''2
0';C'40)2
'2B'''0';2
'07'I02C(
2>22)
4'2'
4C
Results
Genome sequence comparisons of C57BL/6N and C57BL/6J mice – SNPs
and small indels
&-?'067*<83 0'
67*<8H07IN!OC2000'
23:B4'
'24>00'
2;'C+>0'';
020''
7
';067*<8H'4*(C%4
040;C(
204'00<220
2G40''2
0')220'02'
'20;C%2
40';'24'02
C
%03:00'67*<8H67*<83
?'07:INOC&
2'+%>+%#N$O085$$!
2'67*<8H67*<83C'?
';067*<8H'4*(N,O4
02;'42'2
*67*<8H;C%0
2'0'2C%'0
R!C5-'24R,S6!C%
'0!7@9224I0
C
';:;'';'2'
240?'278$3:8@
C+'0067*<8H0
67*<830'C&
22067*<8H67*<83
'4244C"'
8
2,8,240
'-'':0C=
'685$,80244+0
%4C
''3?3:+2N96O'
'0)C%02;2
467*<8H67*<830,9'3:$'
98?'3:69?'C'2,$
3:'$00%4
C&0 2)Zp272
3H42084
;NO#C$!C
Genome sequence comparisons of C57BL/6N and C57BL/6J mice –
structural variants (SVs)
+''?'07
:INO400N8O0
66B467*<8H67*<83C+4N7O2
??'66B7;
40NO*H;'N,OC*'
4506600)
97!0?'C:'?
4;'520
,504467*<8H
67*<83400C+9,2
9
2B00'67*<8H67*<83%4$
'02C
=009,B2'%4$'$2
?''0'$200''0
'Vmn2r65B$86GNnt
'00'Cyp2a22:96!
0$40$$C0002>
4NntN5OG'92
024'04C
'')0'09,B
467*<8H67*<830$720
6?B244
B3%%4$C>422
67*<8H67*<83%4$C
Comprehensive phenotypic assessment of C57BL/6N and C57BL/6J mice
('1"1"(
20
67*<83%67*<8HC1"(0N@O
'44'06!!>>
'01'1
#>#:I(#'C00
1:0
'''$!'0
0@6>+0$='C%00'
10
'::40
1:4N$!O. ";9,'
981:4N@OC+
0>24')24
067*<83%C&2>2'
067*<8H67*<83%0
0H32C
=3H'?24'4
1:1'0-
C";000@0$!
00)'0?2'=+
+0$='C%1:24
'-1"(2
000);
1:C%04'-2
004C24'?2
0042'0
000'4
4'-24C"03
H041:4
4I0C(
43H04
C040
)44
2240040
+0,='$?C&
11
02
''?)2
004C203H
24''0
004NOC(
03H'1:'
01"(2
'00''0
0)0400
2'1:C
(-'2000'
'00043H,
C&0$7='
+0,='$C(2004
04C&
20
420='4+
0,='$40C2
002'0032H00
424C(20
24200C
&040''0
00$='$+0,='$4
'0C&0
4'0'?C
%0'4042
12
'000'
>402203<H00+
0,='$'C
Dysmorphology and Ophthalmology
&020I00'043
H' ?0>C240
'0040C+0
'20'2>N$O2
203H!C,9<'@6P(!C,!6?!C,$,0
*83T5@2C!C,@@<'@6P(!C,@9?!C9!90*8HT
$5R!C!!?C%000
;2'0'
4HE6C!PU!C6PT!G3E6C$U!C6PT!C&
0>42003'0;4
H=',+C%>0Cbr1
rd8
3
4C$!$N$$O'0>
422240>-000
=',+C='0
N$,O240224''4,
702,50=',*G'22
'44C%4042
'0'R!C!!H3='C,C
13
Cardiovascular
3?2241(V!!$
H'0'3''0
00004244)4C
242'0'3'
04'03
H4G0'Q%
2C&0'-4'1(V!$!
'032H$0
04C=0
04'004
020043HC
Metabolism
=0?01(V!!,42
0043H0
$

$

CH')'')
43'>
0C('0
')H23''C%
442H0
>H3''?0'
C%0020?0
1(V!!,2+0,
='$'C0'(:%%
1(V!!9'H23C%
42'4>0
14
Nnt '0HN5O4'
04C
"1 +"1' ?+444
1(V!!63204
4-'C="1 +
H23C(0*
"*"'HC20'
>"1 +C&
>µ%0='C90
>442'43
HC(02?
24>C=040
>02004='
9C
Neurological, behavioural and sensory
%I0043H2
01(V!!7='$''24
2H20)HC
%0042
03HN$9OC(''0000
C'2
32H'004
0C+0000''0
00C%1::0
;0-4
15
00''0'
G;G40
2'>200
42N$6OC2024
00'424C&200
'4'4)004C%'
4>03042'
??:+)N$8OC&
'000?04243
H40002>2
C('I0'32H
042'0C(0
00'4
0''
042422
C
&'<>)3H
='C6C&0'00043H4
0'?>'>C
2>'0'3
C0(:+#*('
:+'1(V!!5='9
H'02
0'02?0'
42C
16
&4004C"00'?
'1(V!!@42H'34
0000'00
04'?'0044'?'4
='4C'1(V!!2'000
0'403
000C&0)43H
4)''029
='6C&00H2>0
$0032''000
00,R!C!6C20$
9''000043
HC%'2
030044
'0'0C
&420432H
00C=003H&
-C32'0
0'H='8C
)'0222'
)0'C242'0
004C
1)0?41(V!='
220'0
00C+'!*
17
'?::?::9U1:
3H'000
C420?4
0043H?4::$::,'4
43HC2'?
4'000='
4+0,='$4040042
C%42'0400
'H3'+*
4000C
Clinical Chemistry
1)200
0'C%40
:1(V!$0'2'0
0:$1(V!60?0C"0
'
'0'0H23=''
)?C"00?00
'200'
24'3H='4C24
'2>4004''
0C"0
'00
><)-I='C+42
>0H
2'234Nnt
18
00'0?'H00
0'C24'
H3<
'000='4G0)
00C%'0'3
+:>'0'HC0
040='$C"00
00'C
Haematology
B'0:$
1(V!8C+40'0'4
'4&*4
*2B'4
='4C420
'4='$C(0
'00C%
400'0'
'C
Immune function and allergy
&2'40'
Listeria monocytogenesH3C=0H3
4Listeria monocytogenes0G2)00
Listeria43HC03
0Listeria90
19
HC%?03
,0H='7C
&3H0"3=*04-?
2C'0000
40H'C
34004
C(2'0203#22
'003#24(?$4(?$
H3G''00='
5C
Discussion
&0'00043H
2'40'442C
%0'2440'
004224>
204>'4C%
00043H;0
'000'4>'C
&067*<831024
'?NO0'0004
3H0'0
(#;0)04
'0067*<8HC
20
:0043H>40
4200'';'C&2'
20,83:00'';'
09,B4'C(206
'';2B''0C
+02>2;
'B2'
;C2'20'2
00>''2
04000'43H
C
&24''
0>>004243HC
=)24::'2
40>>0'3:
B43HC('2
422
'4243HC=0'4
)24-:
24C='3:90,8
24:C=BB2'0:07
06C(:2420>>4
00C=200
0-'>>'43
H0'42
00C=4>4
21
0-'240
0-'C
%40C=2
0000;2
43HC&3:2H3
002'4CB'40
''000004
000)''''00C
>>24'20'4>'0
)02C322
2442
'43H'22
3H>000>4
24>>C
093:26Crb1
Pdzk1PmchAdcy5Nlrp12:20
>41"(4'%4
,CCrb1rd84?'
C*0)'4'
'N$7OC%Crb1
rd8

'$>04
4;'4'0
'C&4223
'023H'
>C20'000
22
40243HC(
4rd803421
N$$OC=Pdzk1'2
>>44243HC=0
PmchAdcy5Nlrp1220400C
Pmch>>''4'
)'C322
'C3)'
4'''2'HC
Adcy5>>?22
24>C3222
Adcy5C34042'00'
2'240C2
4200
0''00'4'42
42C*''
0'03C=4
2PmchAdcy5:2:B100+
'200
0N$5OC3:$>40
N$@O3*3"02
CNlrp12>>00
2N,!OCH22'
Nlrp12?'0'C
20H"3=*?
2'''Nlpr12222
23
'00C34
C:2
''C
=B:,Chl1RptorNnt:2
'1"(%4,CChl1>>
4''4
24I>'CChl1 (31H
C23>'&
-H''00
34)4242
0CRptor>>'404
'0G2'
''G)'G
2CRptor %+HCH0
0''C
2404243H
00Rptor''
H)'23C=H
24''NntN5O
'0'
032HC(''2)'
000Nnt'000
'42Nnt4
C0)42Rptor>>
2'0H%+
Rptor''C%0
24
2'000Nnt''2
%+Rptor00'0C
Conclusions
=0'
40004'24
24C=02>
20;24G
67*<8367*8HC';2
226'2,9'3:$6B
00'67*<8367*<8HC
+220
40440'0
00C&04'2
42')0
0044
>00'2C%2)0
>>'
43H2C%
0420''4>'0>>
''00002
243HC(03:B4
00C20'''402
02'4)'>'42
''3<HC23<H
25
400''
0043H)0
;0'2I00
0C

26
Materials and Methods
Sequencing and genomic analyses
=67*<8H67*<830;'
2#C$!NOC
SNP and small indel identification
%?'067*<83'0'67*<8H?
>@<3*(,7NO03:
00'4?C%;2'
+%>+%#N$O0C&
0''400240
2C3:*H'R!C5
'0R,S6!200C
%67*<83*+'0'420'
C+020+2N9O
<3?3:N6OC'0'
2??002
4'C%''2
40?'20;2C
SNP and small indel validation
&')0078$3:8@
'"1(31C'-4
C&:1 "0;
++K00''2'"3+0
67*<840067*<8H067*<83H
27
67*<83%%K:10C%''
>00C(
-''67*<8H67*<83
00C
(;:;'';'
02C&'0$$3:!C:
':;'W+"''-
10&C%:0'Q'%;)C
+%*%0;';'
:Q@8:;C(00"3+
'3:00C
67*<83'024INOC'
3:24043:N,,$OC
SV identification
'4004N8O
066'?2B467*<8H
67*<83C&2?;'0
66;'>;N,,O097!
0?'C+'5
:'?4;'44C
28
SV validation
:'':,0&144'
C:''-0
2C%:
%;40Q'C%0
24N,9OC'':>Q'0'
'S$>4C:''0;0'
00:C:0@8?
0,!X0
$
;C+;'
+*(,7!!;44'
:1"<:+:C:'?4;'5
02,5044
67*<8H67*<83400C%2
240"40B+2"B
("E$!9N,6OC
Predicted effects of sequence variants
:00042
0':2:B100+-N$5OC
::'0''B3:40
%"4"N,8OC
Phenotyping
Phenotyping platforms in EMPReSSslim
29
+:0'41:4
N,7OC+'')'
=+('>C4;40
'4
4Phenotype Data Analysis4C
67*<83%'C'
40N,7O.
Data capture by Europhenome
"'01:40
4(0'(4>424
'004'C%
01:0:">''
:")0 4>'' 04 C
%)2-2
2I24N,5O0)C%0
4)4IC%4
02'1:'
0-1:4N,7OC(00
 00=%:
C
1Y=%:'>41:
0C%'20'
1:0>0')'
1:C%022
30
00 '0401:%>C(02
01:4C"4
2044'00=%:
C%2
2C:40N,@OC
Phenotype data analysis
1
N@OC(03H'0
40)01
4C(00
00'00C&
4'0'4C+)0
0(:%%-(Z0Y
'0Z?>22YZYC%0
-$!$$0$!,067*<8367*<8H2C%
'2E$!$$C
4'067*<8H67*<83240
0'0C+0
'[-200-?2
004;''
0C
'=[1)%0$)$'4?
;%?2C3?&%
?400
4C%
31
>22''0
4'22420C
(?0'0
0<<)4?2
0''02004
'>C&67*<832'
67*<8H'0C('
024
004C
(02'00
4'?';N9!O
4402',
C+;40
;0C
2440402
4402''2C
0444244
>'000'C
+00,'
='-
!C!790C%420!C$,'
2?C&
04='$C+
-42!C,550
42!C!$''
32
'2'0C%0'
$4='4'2440!C5,
42!C5C
Abbreviations
1:E1:'0G1E
14G1E1'IG
=+E=?+2'G(#E(#>
G(:E(:'G(:%%E
(%%G#:E#>:IG:E
:G3:E'3:G:E
':
Competing interests
%200C
Authors’ contributions
H#&=B?"%#&1*1H"H1H3H((HH+H
=:::H*K?#:+?+K"*4;
2')C
"H+*:H#&=B?"%1*1H"H1H3H((HH+H=::
:H#:K"+++*"*?=+=+?#1&%
&=3?+H+%?BB1B&&&.0
)C
33
"H+*:+?"*+*:"H%#3&0
C
+20C
Description of additional data files
+0E%43:24
+0$E='1:'C
+0,E='$?''
004'C
Acknowledgements
%1"(I0414
?%?$!!8?!,755?%?$!!7?!,79964
&%'4!@5!6C&'0>'4
041"(IG40N@OC&>
?2'&%0
20)00';C*-K
41*'?%=+'3C%
(4='43+'0
'002:13(3+3?!?(3*?!7C
34
References
1. Skarnes WC, Rosen B, West AP, Koutsourakis M, Bushell W, Iyer V, Mujica AO,
Thomas M, Harrow J, Cox T, Jackson D, Severin J, Biggs P, Fu J, Nefedov M, de Jong PJ,
Stewart AF, Bradley A: A conditional knockout resource for the genome-wide
study of mouse gene function. Nature 2011, 474:337-342.
2. Brown SD, Moore MW: Towards an encyclopaedia of mammalian gene
function: the International Mouse Phenotyping Consortium. Dis Model Mech
2012, 5:289-292.
3. Carneiro AM, Airey DC, Thompson B, Zhu CB, Lu L, Chesler EJ, Erikson KM,
Blakely RD: Functional coding variation in recombinant inbred mouse lines
reveals multiple serotonin transporter-associated phenotypes. Proc Natl Acad
Sci U S A 2009, 106:2047-2052.
4. Williams RW, Gu J, Qi S, Lu L: The genetic structure of recombinant inbred
mice: high-resolution consensus maps for complex trait analysis. Genome Biol
2001, 2:RESEARCH0046.
5. Gregorova S, Divina P, Storchova R, Trachtulec Z, Fotopulosova V, Svenson
KL, Donahue LR, Paigen B, Forejt J: Mouse consomic strains: exploiting genetic
divergence between Mus m. musculus and Mus m. domesticus subspecies.
Genome Res 2008, 18:509-515.
6. Valdar W, Solberg LC, Gauguier D, Burnett S, Klenerman P, Cookson WO,
Taylor MS, Rawlins JN, Mott R, Flint J: Genome-wide genetic association of
complex traits in heterogeneous stock mice. Nat Genet 2006, 38:879-887.
7. Churchill GA, Airey DC, Allayee H, Angel JM, Attie AD, Beatty J, Beavis WD,
Belknap JK, Bennett B, Berrettini W, Bleich A, Bogue M, Broman KW, Buck KJ,
Buckler E, Burmeister M, Chesler EJ, Cheverud JM, Clapcote S, Cook MN, Cox RD,
Crabbe JC, Crusio WE, Darvasi A, Deschepper CF, Doerge RW, Farber CR, Forejt J,
Gaile D, Garlow SJ et al: The Collaborative Cross, a community resource for the
genetic analysis of complex traits. Nat Genet 2004, 36:1133-1137.
8. Waterston RH, Lindblad-Toh K, Birney E, Rogers J, Abril JF, Agarwal P,
Agarwala R, Ainscough R, Alexandersson M, An P, Antonarakis SE, Attwood J,
Baertsch R, Bailey J, Barlow K, Beck S, Berry E, Birren B, Bloom T, Bork P, Botcherby
M, Bray N, Brent MR, Brown DG, Brown SD, Bult C, Burton J, Butler J, Campbell RD,
Carninci P et al: Initial sequencing and comparative analysis of the mouse
genome. Nature 2002, 420:520-562.
9. Church DM, Goodstadt L, Hillier LW, Zody MC, Goldstein S, She X, Bult CJ,
Agarwala R, Cherry JL, DiCuccio M, Hlavina W, Kapustin Y, Meric P, Maglott D, Birtle
Z, Marques AC, Graves T, Zhou S, Teague B, Potamousis K, Churas C, Place M,
Herschleb J, Runnheim R, Forrest D, Amos-Landgraf J, Schwartz DC, Cheng Z,
35
Lindblad-Toh K, Eichler EE et al: Lineage-specific biology revealed by a finished
genome assembly of the mouse. PLoS Biol 2009, 7:e1000112.
10. Mekada K, Abe K, Murakami A, Nakamura S, Nakata H, Moriwaki K, Obata Y,
Yoshiki A: Genetic differences among C57BL/6 substrains. Exp Anim 2009,
58:141-149.
11. Keane TM, Goodstadt L, Danecek P, White MA, Wong K, Yalcin B, Heger A,
Agam A, Slater G, Goodson M, Furlotte NA, Eskin E, Nellaker C, Whitley H, Cleak J,
Janowitz D, Hernandez-Pliego P, Edwards A, Belgard TG, Oliver PL, McIntyre RE,
Bhomra A, Nicod J, Gan X, Yuan W, van der Weyden L, Steward CA, Bala S, Stalker J,
Mott R et al: Mouse genomic variation and its effect on phenotypes and gene
regulation. Nature 2011, 477:289-294.
12. DePristo MA, Banks E, Poplin R, Garimella KV, Maguire JR, Hartl C, Philippakis
AA, del Angel G, Rivas MA, Hanna M, McKenna A, Fennell TJ, Kernytsky AM,
Sivachenko AY, Cibulskis K, Gabriel SB, Altshuler D, Daly MJ: A framework for
variation discovery and genotyping using next-generation DNA sequencing
data. Nat Genet 2011, 43:491-498.
13. Gnerre S, Maccallum I, Przybylski D, Ribeiro FJ, Burton JN, Walker BJ, Sharpe
T, Hall G, Shea TP, Sykes S, Berlin AM, Aird D, Costello M, Daza R, Williams L, Nicol R,
Gnirke A, Nusbaum C, Lander ES, Jaffe DB: High-quality draft assemblies of
mammalian genomes from massively parallel sequence data. Proc Natl Acad Sci
U S A 2011, 108:1513-1518.
14. Wang K, Li M, Hakonarson H: ANNOVAR: functional annotation of genetic
variants from high-throughput sequencing data. Nucleic Acids Res 2010,
38:e164.
15. Grant JR, Arantes AS, Liao X, Stothard P: In-depth annotation of SNPs
arising from resequencing projects using NGS-SNP. Bioinformatics 2011,
27:2300-2301.
16. Wong K, Keane TM, Stalker J, Adams DJ: Enhanced structural variant and
breakpoint detection using SVMerge by integration of multiple detection
methods and local assembly. Genome Biol 2010, 11:R128.
17. Yalcin B, Wong K, Bhomra A, Goodson M, Keane TM, Adams DJ, Flint J: The
fine-scale architecture of structural variants in 17 mouse genomes. Genome
Biol 2012, 13:R18.
18. Freeman H, Shimomura K, Horner E, Cox RD, Ashcroft FM: Nicotinamide
nucleotide transhydrogenase: a key role in insulin secretion. Cell metabolism
2006, 3:35-45.
36
19. Morgan H, Beck T, Blake A, Gates H, Adams N, Debouzy G, Leblanc S, Lengger
C, Maier H, Melvin D, Meziane H, Richardson D, Wells S, White J, Wood J, de Angelis
MH, Brown SD, Hancock JM, Mallon AM: EuroPhenome: a repository for high-
throughput mouse phenotyping data. Nucleic Acids Res 2010, 38:D577-585.
20. Gates H, Mallon AM, Brown SD: High-throughput mouse phenotyping.
Methods 2011, 53:394-404.
21. Prusky GT, Alam NM, Beekman S, Douglas RM: Rapid quantification of
adult and developing mouse spatial vision using a virtual optomotor system.
Invest Ophthalmol Vis Sci 2004, 45:4611-4616.
22. Mattapallil MJ, Wawrousek EF, Chan CC, Zhao H, Roychoudhury J, Ferguson
TA, Caspi RR: The Rd8 mutation of the Crb1 gene is present in vendor lines of
C57BL/6N mice and embryonic stem cells, and confounds ocular induced
mutant phenotypes. Invest Ophthalmol Vis Sci 2012, 53:2921-2927.
23. Paques M, Guyomard JL, Simonutti M, Roux MJ, Picaud S, Legargasson JF,
Sahel JA: Panretinal, high-resolution color photography of the mouse fundus.
Invest Ophthalmol Vis Sci 2007, 48:2769-2774.
24. Matsuo N, Takao K, Nakanishi K, Yamasaki N, Tanda K, Miyakawa T:
Behavioral profiles of three C57BL/6 substrains. Front Behav Neurosci 2010,
4:29.
25. Tucci V, Lad HV, Parker A, Polley S, Brown SD, Nolan PM: Gene-environment
interactions differentially affect mouse strain behavioral parameters. Mamm
Genome 2006, 17:1113-1120.
26. Grenham S, Clarke G, Cryan JF, Dinan TG: Brain-gut-microbe
communication in health and disease. Front Physiol 2011, 2:94.
27. Mehalow AK, Kameya S, Smith RS, Hawes NL, Denegre JM, Young JA, Bechtold
L, Haider NB, Tepass U, Heckenlively JR, Chang B, Naggert JK, Nishina PM: CRB1 is
essential for external limiting membrane integrity and photoreceptor
morphogenesis in the mammalian retina. Human molecular genetics 2003,
12:2179-2189.
28. Choi Y, Sims GE, Murphy S, Miller JR, Chan AP: Predicting the functional
effect of amino Acid substitutions and indels. PLoS One 2012, 7:e46688.
29. Jeru I, Duquesnoy P, Fernandes-Alnemri T, Cochet E, Yu JW, Lackmy-Port-Lis
M, Grimprel E, Landman-Parker J, Hentgen V, Marlin S, McElreavey K, Sarkisian T,
Grateau G, Alnemri ES, Amselem S: Mutations in NALP12 cause hereditary
periodic fever syndromes. Proc Natl Acad Sci U S A 2008, 105:1614-1619.
37
30. Arthur JC, Lich JD, Ye Z, Allen IC, Gris D, Wilson JE, Schneider M, Roney KE,
O'Connor BP, Moore CB, Morrison A, Sutterwala FS, Bertin J, Koller BH, Liu Z, Ting
JP: Cutting edge: NLRP12 controls dendritic and myeloid cell migration to
affect contact hypersensitivity. J Immunol 2010, 185:4515-4519.
31. SNP & Indel Data:
http://www.ncbi.nlm.nih.gov/projects/SNP/snp_viewTable.cgi?handle=MRCHARW
ELL
32. Sherry ST, Ward MH, Kholodov M, Baker J, Phan L, Smigielski EM, Sirotkin K:
dbSNP: the NCBI database of genetic variation. Nucleic Acids Res 2001, 29:308-
311.
33. Manske HM, Kwiatkowski DP: LookSeq: a browser-based viewer for deep
sequencing data. Genome Res 2009, 19:2125-2132.
34. Yalcin B, Willis-Owen SA, Fullerton J, Meesaq A, Deacon RM, Rawlins JN,
Copley RR, Morris AP, Flint J, Mott R: Genetic dissection of a behavioral
quantitative trait locus shows that Rgs2 modulates anxiety in mice. Nat Genet
2004, 36:1197-1202.
35. Structural Variant Data: http://www.ebi.ac.uk/dgva/page.php
36. Eppig JT, Blake JA, Bult CJ, Kadin JA, Richardson JE: The Mouse Genome
Database (MGD): comprehensive resource for genetics and genomics of the
laboratory mouse. Nucleic Acids Res 2012, 40:D881-886.
37. Mallon AM, Blake A, Hancock JM: EuroPhenome and EMPReSS: online
mouse phenotyping resource. Nucleic Acids Res 2008, 36:D715-718.
38. Europhenome Java Library:
http://sourceforge.net/projects/europhenome/
39. Phenotype Data: http://www.har.mrc.ac.uk/nj
40. Efron B: 1977 Rietz Lecture - Bootstrap Methods - Another Look at the
Jackknife. Ann Stat 1979, 7:1-26.
38
Figure 1. ''000
467*<8367*<8H0000
\-.(;(
&%'(&%(C:'
01:N,7OC'02
000'0>C'000
0'4CA):
'00043H,CB):
'00043H$4
20C
Figure 2. ''000
467*<8367*<8H0000
\-.(;(
&%'(&%(\0
'000$4
0C:'
01:C'02000'
0>C
Figure 3C'000467*<8367*<8H
C(A)&0>4067*<8H0
0;2067*<832'0
2467*<830'C"'
67*<83008@C$PT7!
U,90(99C8PT96U650$,C!P
T59U@90&%(00>
39
67*<8H(E$@GE76U760G&%(E,9U$5
0C(B)*240004
4,07'6
40'067*<8HC(C)Q002
67*<8367*<8HT9!T7!
2C%4029C5]!C067*<83T
$$2C6C,]!C067*<8HT,5C*00
'0R!C!!?&>%C
Figure 4. X%00244
9?>?67*<8H267*<83(A)0(B)C4
09?>?00'4
(C)C0
)404>2
4249?>?67*<8H67*<83(D)C
+442E*CBC<%CBC42<2G%4C3C44G
%4CC%4'G?"C2GCC(C
)!0,0G"C+C'0G
C:CGC%C>G":")GC
C
Figure 5. '>C*(A)P0
>(B)40'<>(C)
67*<8HT!67*<83T@'5?!>C"
]1MR!C!6?C(D)'020C
4]100'
099!CCC,!!067*<8HT!67*<83
40
T!'@?>CMR!C!6MMR!C!!6MMMR!C!!!H2C3?
GMR!C!6MMR!C!!6MMMR!C!!!2C"=Y"C
Figure 6. &-CA)=-%''2C
4]100
67*<8HT!67*<83T!'8?$!>CMMR!C!!6
MMMR!C!!!6H2C3?GMMR!C!!6MMMR!C!!!2C"=Y"CB)
:4C*P;6'4
C"2$6PCMR!C!6MMR!C!!6MMMR!C!!!6
2C;?CCC2>067*<8H67*<83
'4C"00C
Figure 7.0467*<8H67*<83
4CA)#?222000
67*<8H67*<830C2C0$)!
9
?0'
00Listeria monocytogenes1"CB)*20
67*<8H67*<830C2C0$)!
9
0L. monocytogenes
1"C'0->0
4'CC)020>8(?80
4!(:?!>'$$467*<8H
67*<83(B)C0?0>
>4'>
$!?:):(2';!!Q'C'0
000EMR!C!6MMR!C!?&?C
*>4467*<8H4C&4467*<83
4C
41
Figure 8. A)03#3#2067*<8H
*8H267*<83*83%0C
3#067*<8H67*<83
)'CU<?"0(=3^2
'",?3#CU3#40C
B?02C
067*<8H67*<83-40$6
_0!C6P"3=*2>C%'4
06_0!C6P"3=*06"3=*C'
2?C1>
950'C20,))
'CMR!C!6GMMR!C!!6?&
42
Figure S1. 1:'C%$!
'0C"0=+04
;0C
Figure S2. A-D) ='='$40
67*<8367*<8H0E-H) 
='='$'00-42
CA,E):'0004
3H,CB,F):'0
0043H$420
CC,G):042'0
00CD,H):'0
00$40C
43

Table 1. Coding SNPs and small indels identified between C57BL/6N and
C57BL/6J
Chr
Position
B6J
Base
B6N
Base
Strain
Gene Name
B6J
Amino Acid
B
6N
Amino Acid
Nonsense Polymorphism
13 65023280 C T B6N
Spata31
Arginine * (STOP)
Missense Polymorphisms
1 59904011 G A B6N
Bmpr2
Arginine Glutamine
3 95538799 T C B6J
Ecm1
Isoleucine Valine
3 96658480 A G B6J
Pdzk1
Asparagine Aspartic acid
4 21800831 C G B6J
Sfrs18
Arginine Glycine
4 137777588 C T B6N
Hp1bp3
Leucine Phenylalanine
4 140354038 A G B6N
Padi3
Leucine Proline
4 148318468 T C B6J
Casz1
Leucine Proline
5 90204376 C T B6N
Adamts3
Valine Isoleucine
5 97187161 T C B6J
Fras1
Leucine Proline
5 113191741 C T B6N
Myo18b
Arginine Histidine
6 39350455 T A B6J
Mkrn1
Asparagine Tyrosine
7 3222538 T C B6J
Nlrp12
Lysine Arginine
7 63386662 G A B6J
Herc2
Glycine Aspartic acid
7 86256240 A C B6J
Acan
Histidine Proline
7 110121823 C T B6N
Olfr577
Valine Isoleucine
7 127278693 G A B6N+Spretus
Zp2
Alanine Valine
7 129311164 C T B6N
Plk1
Arginine Tryptophan
9 24935069 C G B6N
Herpud2
Valine Leucine
10 66700922 T C B6J
Jmjd1c
Leucine Proline
10 78632222 A G B6N
Vmn2r80
Asparagine Serine
10 87554578 T C B6N
Pmch
Isoleucine Threonine
11 46036117 G A B6N
Cyfip2
Serine Phenylalanine
11 90341985 C T B6N
Stxb4
Alanine Threonine
13 21560172 A G B6J
Nkapl
Glycine Arginine
13 73465884 A G B6J
Ndufs6
Valine Alanine
13 93833534 C G B6J
Cmya5
Alanine Proline
14 70986011 G T B6N
Fam160b2
Serine Arginine
15 11266138 G T B6N
Adamts12
Cysteine Phenylalanine
15 77468437 A C B6J
Apol11b
Isoleucine Arginine
16 35291630 G A B6N
Adcy5
Valine Methionine
17 47537359 T C B6J
Guca1a
Isoleucine Valine
X 131227581 C A B6N
Armcx4
Alanine Aspartic acid
Splice Site Polymorphism
5 54280548 A G
B6J
Tbc1d19
- -
Frameshift
1bp
-
D
eletions
1 141133664 G -
B6N
Crb1
- -
9 65127938 G -
B6J
Cilp
- -
44
Table 2. Structural variants between C57BL/6N and C57BL/6J
Chr SV start SV stop Ancestral event Strain Gene Overlap
1 149518394 149524878 LINE Ins B6J
2 7325700 7330977 IAP Ins B6J
2 70619835 70620080 SINE Ins B6J
Tlk1
intron
3 77975065 77977953 Del B6N
3 5049018 5055845 LINE Ins B6J
3 60336036 60336037 Del (large) B6J
Mbnl1
intron
3 41885819 41887255 LINE Ins B6J
3 18484710 18484889 Del B6N
4 101954274 101954395 Del B6N
Pde4b
intron
4 116051393 116051799 MaLR Ins B6J
Mast2
intron
5 46376307 46377852 LINE Ins B6J
5 90356490 90356491 Del (~300 bp) B6J
5 146248861 146261885 Ins B6J+others
6 18112291 18119019 LINE Ins B6J
6 62964974 62972907 LINE Ins B6J
6 86478779 86479400 Ins B6J
6 103669536 103676487 LINE Ins B6J
Chl1
intron
6 104207081 104214434 LINE Ins B6J
7 92095990 92096149 Del B6N
Vmn2r65
exon
7 27636128 27748456 Ins B6J
Cyp2a22
entire
7 100892501 100899058 LINE Ins B6J
7 139306094 139307981 MaLR Ins B6J
Cpxm2
intron
8 16716381 16716382 Del (large) B6J
Csmd1
intron
9 25674550 25674770 SINE Ins B6J
9 58544415 58546304 MaLR Ins B6J
2410076I21Rik
intron
10 3039196 3039197 Del (large) B6J
10 29339441 29345955 LINE Ins B6J
10 32536420 32543464 LINE Ins B6J
Nkain2
intron
10 49543303 49550645 LINE Ins B6J
11 104906390 104906621 Del B6N
11 119560391 119566827 MTA Ins B6J
Rptor
intron
12 42023964 42032747 Del B6N
Immp2l
intron
13 71224557 71231011 MTA Ins B6J
13 120164268 120164269 Del (large) B6J
Nnt
exon
14 112825585 112832341 LINE Ins B6J
15 49554596 49554597 Ins (large) B6N
15 31106173 31106382 VNTR
16 6115804 6138105 Del B6N
17 60286367 60286368 Ins (~2000 bp) B6N
18 4809271 4809272 Del (~1200 bp) B6J
19 12863187 12863188 Del (~1800 bp) B6J
Zfp91
intron
X 15697909 15697910 Del (~400 bp) B6J
X 95155499 95163160 LINE Ins B6J
Start and stop coordinates are given for MGSCv37 of the mouse reference genome. Del, deletion; IAP,
intracisternal A particle; Ins, insertion; LINE, long interspersed nuclear elements; MaLR, mammalian
apparent LTR-retrotransposon; MTA, member of transcript retrotransposon; SINE, short interspersed
nuclear elements; VNTR, variable number tandem repeat.
45
Table 3. Comparison of predicted effects of SNPs and SVs that might contribute to the phenotypic
differences between C57BL/6N and C57BL/6J (see text). We have identified variant genes that show
homozygote knockout phenotypes with associated MP terms that were assessed in the phenotyping
pipeline, and compared these phenotypes to those observed between N and J.
Protein
coding
gene
C57BL/6J
Amino
Acid
C57BL/6N
Amino Acid
SNP is
Private
to
PROVEAN
Prediction
1
MP Terms
B6J
vs
B6N
2
B6N vs
B6J
2
Adcy5 Valine (V) Methionine
(M)
B6N TOLERATED
(-1.712)
impaired
coordination_MP:0001405
NR P
hypoactivity_MP:0001402 NR P
Pmch Isoleucine
(I)
Threonine
(T)
B6N TOLERATED
(0.493)
decreased circulating glucose
level_MP:0005560
NR A
abnormal glucose
tolerance_MP:0005291
NR A
increased oxygen
consumption_MP:0005289
NR P
Pdzk1 Asparagine
(N)
Aspartic Acid
(D)
B6J TOLERATED
(0.95)
increased circulating
cholesterol level_MP:0001556
A NR
Nlrp12 Lysine
(K)
Arginine
(A)
B6J TOLERATED
(0.781)
abnormal type IV
hypersensitivity
reaction_MP:0002534
P NR
Crb1 - - B6N - photosensitivity_MP:0001999 NR P
abnormal ocular fundus
morphology_MP:0002864
NR P
retinal
degeneration_MP:0001326
NR P
abnormal retina
morphology_MP:0001325
NR P
abnormal retinal photoreceptor
layer_MP:0003728
NR P
Chl1 - - B6J - abnormal learning/ memory_
MP:0001449
A NR
abnormal spatial working
memory_MP:0008428
A NR
Rptor - - B6J - increased lean body
mass_MP:0003960
P NR
increased oxygen
consumption_MP:0005289
A NR
hypoactivity_MP:0001402 A NR
decreased circulating glucose
level_MP:0005560
P NR
improved glucose
tolerance_MP:0005292
A NR
Nnt - - B6J - impaired glucose
tolerance_MP:0005293
P NR
1
Threshold for intolerance is -2.3
2
These columns indicate the direction of the phenotype effect that might be observed given the assignment of a SNP or SV as
private to B6J or B6N. Only one direction will be relevant and comparable to the effects of the knockout mutation.
Key:
NR
Not relevant
P
Phenotype present
Phenotype ant
46
Figure 1
Figure 2
Figure 3
Figure 5
Figure 6
Figure 7
Additional files provided with this submission:
Additional file 1: TableS1.pdf, 225K
http://genomebiology.com/imedia/8046326471045638/supp1.pdf
Additional file 2: Supplementary_Figure_1.pdf, 544K
http://genomebiology.com/imedia/1086014387104073/supp2.pdf
Additional file 3: Supplementary_Figure_2.pdf, 2994K
http://genomebiology.com/imedia/1777967506104073/supp3.pdf
... This discrepancy in the synaptic phenotypes of two Arid1b +/− mouse lines with the same exon 5 deletion may reflect a difference in the genetic background of the mutant mouse lines: The first study used C67BL6/J mice, while we used C67BL/N mice. These genetic backgrounds have been reported to exhibit multiple phenotypic differences, including differences in synaptic transmission and metabolism (11)(12)(13)(14). ...
... To test this hypothesis, we attempted to change the genetic background of our Arid1b +/− mice from C57BL/6 N to C57BL/6 J (i.e., Arid1b-Kim-N mice to Arid1b-Kim-J mice) by backcrossing Arid1b-Kim-N mice with wild-type (WT) C57BL/6 J mice for more than seven generations ( Figure 1B). This change in the genetic background was confirmed by PCR genotyping for exon 9 of the Nnt (nicotinamide nucleotide transhydrogenase) gene (14), which was present in Arid1b-Kim-N mice but absent from Arid1b-Kim-J mice. ...
... It remains unclear how altering the genetic background of Arid1b +/− mice from C57BL/6 N to C57BL/6 J can decrease inhibitory synaptic transmission. We do know that mice of C57BL/6 N and C57BL/6 J backgrounds differ in their genetic and phenotypic profiles (12)(13)(14). Genetic differences between C57BL/6 N and C57BL/6 J mice include 34 single-nucleotide polymorphisms, 2 indels, and 15 structural variants. Phenotypic differences were observed in various domains, including dysmorphology, ophthalmology, cardiovascular, metabolism, neurological, behavioral, sensory, clinical chemistry, hematology, and immune/allergy. ...
Article
Full-text available
ARID1B, a chromatin remodeler, is strongly implicated in autism spectrum disorders (ASD). Two previous studies on Arid1b-mutant mice with the same exon 5 deletion in different genetic backgrounds revealed distinct synaptic phenotypes underlying the behavioral abnormalities: The first paper reported decreased inhibitory synaptic transmission in layer 5 pyramidal neurons in the medial prefrontal cortex (mPFC) region of the heterozygous Arid1b-mutant (Arid1b+/−) brain without changes in excitatory synaptic transmission. In the second paper, in contrast, we did not observe any inhibitory synaptic change in layer 5 mPFC pyramidal neurons, but instead saw decreased excitatory synaptic transmission in layer 2/3 mPFC pyramidal neurons without any inhibitory synaptic change. In the present report, we show that when we changed the genetic background of Arid1b+/− mice from C57BL/6 N to C57BL/6 J, to mimic the mutant mice of the first paper, we observed both the decreased inhibitory synaptic transmission in layer 5 mPFC pyramidal neurons reported in the first paper, and the decreased excitatory synaptic transmission in mPFC layer 2/3 pyramidal neurons reported in the second paper. These results suggest that genetic background can be a key determinant of the inhibitory synaptic phenotype in Arid1b-mutant mice while having minimal effects on the excitatory synaptic phenotype.
... B6J and B6NJ are nearly 100% genetically identical, yet exhibit significant differences in several addiction model traits 18 , including ethanol consumption [19][20][21] , psychostimulant-induced locomotor activity and sensitization 22,23 , nicotine-induced locomotor activity, hypothermia, antinociception, and anxiety-like behavior 24 , conditioned place aversion induced by the mu opioid receptor antagonist naloxone 25 , and binge-like eating 26,27 . While phenotypic differences between B6 substrains can be quite large 18,28,29 , genotypic diversity is extremely small [29][30][31][32][33] . Together, reliable, robust phenotypic variance and extremely reduced genetic complexity are ideal for behavioral QTL and expression QTL (eQTL) analysis in an F2 reduced complexity cross (RCC) analysis and can facilitate candidate gene nomination and causal variant identification 34,35 . ...
... B6J and B6NJ are nearly 100% genetically identical, yet exhibit significant differences in several addiction model traits 18 , including ethanol consumption [19][20][21] , psychostimulant-induced locomotor activity and sensitization 22,23 , nicotine-induced locomotor activity, hypothermia, antinociception, and anxiety-like behavior 24 , conditioned place aversion induced by the mu opioid receptor antagonist naloxone 25 , and binge-like eating 26,27 . While phenotypic differences between B6 substrains can be quite large 18,28,29 , genotypic diversity is extremely small [29][30][31][32][33] . Together, reliable, robust phenotypic variance and extremely reduced genetic complexity are ideal for behavioral QTL and expression QTL (eQTL) analysis in an F2 reduced complexity cross (RCC) analysis and can facilitate candidate gene nomination and causal variant identification 34,35 . ...
Preprint
Full-text available
Opioid use disorder is heritable, yet its genetic etiology is largely unknown. Analysis of addiction model traits in rodents (e.g., opioid behavioral sensitivity and withdrawal) can facilitate genetic and mechanistic discovery. C57BL/6J and C57BL/6NJ substrains have extremely limited genetic diversity, yet can show reliable phenotypic diversity which together, can facilitate gene discovery. The C57BL/6NJ substrain was less sensitive to oxycodone (OXY)-induced locomotor activity compared to the C57BL/6J substrain. Quantitative trait locus (QTL) mapping in an F2 cross identified a distal chromosome 1 QTL explaining 7-12% of the variance in OXY locomotor sensitivity and anxiety-like withdrawal in the elevated plus maze. We identified a second QTL for withdrawal on chromosome 5 near the candidate gene Gabra2 (alpha-2 subunit of GABA-A receptor) explaining 9% of the variance. Next, we generated recombinant lines from an F2 founder spanning the distal chromosome 1 locus (163-181 Mb), captured the QTL for OXY sensitivity and withdrawal, and fine-mapped a 2.45-Mb region (170.16-172.61 Mb). There were five striatal cis-eQTL transcripts in this region (Pcp4l1, Ncstn, Atp1a2, Kcnj9, Igsf9), two of which were confirmed at the protein level (KCNJ9, ATP1A2). Kcnj9, a.k.a., GIRK3, codes for a potassium channel that is a major effector of mu opioid receptor signaling. Atp1a2 codes for a subunit of a Na+/K+ ATPase enzyme that regulates neuronal excitability and shows adaptations following chronic opioid administration. To summarize, we identified genetic sources of opioid behavioral differences in C57BL/6 substrains, two of the most widely and often interchangeably used substrains in opioid addiction research.
... Littermates have comparable genetic background to the knockout (KO) mice and are exposed to the same environment during development and birth. C57BL/6 N ES cells have been an important source for the construction of transgenic mice by the International Mouse Phenotyping Consortium (IMPC) [39] while some spontaneous mutations on the C57BL/6 J background are used in many biomedical studies [40]. It is also important to specify the genetic background of the transgenic mice since both C57BL/6 N and C57BL/6 J ES cells have been used [41]. ...
Article
Full-text available
The involvement of necroptosis in the control of influenza A virus (IAV) infection has been reported in multiple studies. Downstream of the nucleic acid sensor ZBP1, RIPK3 kinase activity is critically involved in the induction of necroptotic cell death by phosphorylating MLKL, while RIPK3 as a scaffold can induce apoptosis. Paradoxically, RIPK3 -deficiency of mice may result in increased or decreased susceptibility to IAV infection. Here, we critically review the published reports on the involvement of RIPK3 in IAV infection susceptibility and try to identify differences in experimental settings that could explain seemingly conflicting outcomes. Analysis of the experimental reports revealed differences in the IAV challenge dose, the IAV inoculum preparation, IAV titer assessment, as well as the route of inoculation between studies. Furthermore, differences were noticed in the inclusion of littermate controls, which show high variance in viral sensitivity. Our evaluation argues for a standardized setup for IAV infection experiments including the preparation of the IAV virus, the use of different IAV infectious doses description and the proper experimental genetic controls of the mouse strains to increase inter-laboratory consistency in this field.
... However, this is inconsistent with reports by Incani et al. [23], who documented higher worm but lower egg burden in BALB/c compared to C57BL/6 mice using Venezuelan and Brazilian S. mansoni populations, and Bin Dajem et al. [54], who found increased worm burden in C57BL/6 hosts with an Egyptian parasite. These differences could be explained by (i) the number of cercariae used for the infection (Alves: 30, Incani: 60, Bin Dajem: 100), (ii) the method of infection (tail immersion vs. abdominal skin), (iii) statistical methods (log transformation vs. non-parametric tests), (iv) duration of the study or (v) even genetic variation in the mouse colonies maintained at the different institutions [55]. as calculated by ANOVA. ...
Article
Full-text available
Background The role of pathogen genotype in determining disease severity and immunopathology has been studied intensively in microbial pathogens including bacteria, fungi, protozoa and viruses but is poorly understood in parasitic helminths. The medically important blood fluke Schistosoma mansoni is an excellent model system to study the impact of helminth genetic variation on immunopathology. Our laboratory has demonstrated that laboratory schistosome populations differ in sporocyst growth and cercarial production in the intermediate snail host and worm establishment and fecundity in the vertebrate host. Here, we (i) investigate the hypothesis that schistosome genotype plays a significant role in immunopathology and related parasite life history traits in the vertebrate mouse host and (ii) quantify the relative impact of parasite and host genetics on infection outcomes. Methods We infected BALB/c and C57BL/6 mice with four different laboratory schistosome populations from Africa and the Americas. We quantified disease progression in the vertebrate host by measuring body weight and complete blood count (CBC) with differential over a 12-week infection period. On sacrifice, we assessed parasitological (egg and worm counts, fecundity), immunopathological (organ measurements and histopathology) and immunological (CBC with differential and cytokine profiles) characteristics to determine the impact of parasite and host genetics. Results We found significant variation between parasite populations in worm numbers, fecundity, liver and intestine egg counts, liver and spleen weight, and fibrotic area but not in granuloma size. Variation in organ weight was explained by egg burden and intrinsic parasite factors independent of egg burden. We found significant variation between infected mouse lines in cytokine levels (IFN-γ, TNF-α), eosinophils, lymphocytes and monocyte counts. Conclusions This study showed that both parasite and host genotype impact the outcome of infection. While host genotype explains most of the variation in immunological traits, parasite genotype explains most of the variation in parasitological traits, and both host and parasite genotypes impact immunopathology outcomes. Graphical Abstract
... A previous report has highlighted molecular differences within mice of 129 substrains [89]. Similarly, the International Mouse Phenotyping Consortium (IMPC) has shown that all commonly used C57BL/6 strains, in particular the substrains C57BL/6J (used here) and C57BL/6N, are not genetically identical and exhibit phenotypic differences [90]. ...
Article
Full-text available
Disruption of meiosis and DNA repair genes is associated with female fertility disorders like premature ovarian insufficiency (POI). In this study, we identified a homozygous missense variant in the HELQ gene (c.596 A>C; p.Gln199Pro) through whole exome sequencing in a POI patient, a condition associated with disrupted ovarian function and female infertility. HELQ, an enzyme involved in DNA repair, plays a crucial role in repairing DNA cross-links and has been linked to germ cell maintenance, fertility, and tumour suppression in mice. To explore the potential association of the HELQ variant with POI, we used CRISPR/Cas9 to create a knock-in mouse model harbouring the equivalent of the human HELQ variant identified in the POI patient. Surprisingly, Helq knock-in mice showed no discernible phenotype, with fertility levels, histological features, and follicle development similar to wild-type mice. Despite the lack of observable effects in mice, the potential role of HELQ in human fertility, especially in the context of POI, should not be dismissed. Larger studies encompassing diverse ethnic populations and alternative functional approaches will be necessary to further examine the role of HELQ in POI. Our results underscore the potential uncertainties associated with genomic variants and the limitations of in vivo animal modelling.
... In its original form, the model was used to explain this discrete morphological trait in inbred (isogenic) lines of guinea pigs. As for polydactyly, a wide variety of phenotypes have subsequently been observed at background levels in isogenic lines of rodents, with strain-specific penetrance values [33][34][35]. In this early era of genetics and developmental biology (or embryology, as it was then known), Wright especially attributed this phenotypic variability to environmental variation. ...
Article
Full-text available
Incomplete penetrance is the rule rather than the exception in Mendelian disease. In syndromic monogenic disorders, phenotypic variability can be viewed as the combination of incomplete penetrance for each of multiple independent clinical features. Within genetically identical individuals, such as isogenic model organisms, stochastic variation at molecular and cellular levels is the primary cause of incomplete penetrance according to a genetic threshold model. By defining specific probability distributions of causal biological readouts and genetic liability values, stochasticity and incomplete penetrance provide information about threshold values in biological systems. Ascertainment of threshold values has been achieved by simultaneous scoring of relatively simple phenotypes and quantitation of molecular readouts at the level of single cells. However, this is much more challenging for complex morphological phenotypes using experimental and reductionist approaches alone, where cause and effect are separated temporally and across multiple biological modes and scales. Here I consider how causal inference, which integrates observational data with high confidence causal models, might be used to quantify the relative contribution of different sources of stochastic variation to phenotypic diversity. Collectively, these approaches could inform disease mechanisms, improve predictions of clinical outcomes and prioritize gene therapy targets across modes and scales of gene function. This article is part of a discussion meeting issue ‘Causes and consequences of stochastic processes in development and disease’.
Article
Full-text available
As next-generation sequencing projects generate massive genome-wide sequence variation data, bioinformatics tools are being developed to provide computational predictions on the functional effects of sequence variations and narrow down the search of casual variants for disease phenotypes. Different classes of sequence variations at the nucleotide level are involved in human diseases, including substitutions, insertions, deletions, frameshifts, and non-sense mutations. Frameshifts and non-sense mutations are likely to cause a negative effect on protein function. Existing prediction tools primarily focus on studying the deleterious effects of single amino acid substitutions through examining amino acid conservation at the position of interest among related sequences, an approach that is not directly applicable to insertions or deletions. Here, we introduce a versatile alignment-based score as a new metric to predict the damaging effects of variations not limited to single amino acid substitutions but also in-frame insertions, deletions, and multiple amino acid substitutions. This alignment-based score measures the change in sequence similarity of a query sequence to a protein sequence homolog before and after the introduction of an amino acid variation to the query sequence. Our results showed that the scoring scheme performs well in separating disease-associated variants (n = 21,662) from common polymorphisms (n = 37,022) for UniProt human protein variations, and also in separating deleterious variants (n = 15,179) from neutral variants (n = 17,891) for UniProt non-human protein variations. In our approach, the area under the receiver operating characteristic curve (AUC) for the human and non-human protein variation datasets is ∼0.85. We also observed that the alignment-based score correlates with the deleteriousness of a sequence variation. In summary, we have developed a new algorithm, PROVEAN (Protein Variation Effect Analyzer), which provides a generalized approach to predict the functional effects of protein sequence variations including single or multiple amino acid substitutions, and in-frame insertions and deletions. The PROVEAN tool is available online at http://provean.jcvi.org.
Article
Full-text available
Nearly 10 years after the completion of the human genome project, and the report of a complete sequence of the mouse genome, it is salutary to reflect that we remain remarkably ignorant of the function of most genes in the mammalian genome. This is clearly illustrated from the outputs of genome-wide
Article
Full-text available
We noted an unexpected inheritance pattern of lesions in several strains of gene-manipulated mice with ocular phenotypes. The lesions, which appeared at various stages of backcross to C57BL/6, bore resemblance to the rd8 retinal degeneration phenotype. We set out to examine the prevalence of this mutation in induced mutant mouse lines, vendor C57BL/6 mice and in widely used embryonic stem cells. Ocular lesions were evaluated by fundus examination and histopathology. Detection of the rd8 mutation at the genetic level was performed by PCR with appropriate primers. Data were confirmed by DNA sequencing in selected cases. Analysis of several induced mutant mouse lines with ocular disease phenotypes revealed that the disease was associated 100% with the presence of the rd8 mutation in the Crb1 gene rather than with the gene of interest. DNA analysis of C57BL/6 mice from common commercial vendors demonstrated the presence of the rd8 mutation in homozygous form in all C57BL/6N substrains, but not in the C57BL/6J substrain. A series of commercially available embryonic stem cells of C57BL/6N origin and C57BL/6N mouse lines used to generate ES cells also contained the rd8 mutation. Affected mice displayed ocular lesions typical of rd8, which were detectable by funduscopy and histopathology as early as 6 weeks of age. These findings identify the presence of the rd8 mutation in the C57BL/6N mouse substrain used widely to produce transgenic and knockout mice. The results have grave implications for the vision research community who develop mouse lines to study eye disease, as presence of rd8 can produce significant disease phenotypes unrelated to the gene or genes of interest. It is suggested that researchers screen for rd8 if their mouse lines were generated on the C57BL/6N background, bear resemblance to the rd8 phenotype, or are of indeterminate origin.
Article
Full-text available
Accurate catalogs of structural variants (SVs) in mammalian genomes are necessary to elucidate the potential mechanisms that drive SV formation and to assess their functional impact. Next generation sequencing methods for SV detection are an advance on array-based methods, but are almost exclusively limited to four basic types: deletions, insertions, inversions and copy number gains. By visual inspection of 100 Mbp of genome to which next generation sequence data from 17 inbred mouse strains had been aligned, we identify and interpret 21 paired-end mapping patterns, which we validate by PCR. These paired-end mapping patterns reveal a greater diversity and complexity in SVs than previously recognized. In addition, Sanger-based sequence analysis of 4,176 breakpoints at 261 SV sites reveal additional complexity at approximately a quarter of structural variants analyzed. We find micro-deletions and micro-insertions at SV breakpoints, ranging from 1 to 107 bp, and SNPs that extend breakpoint micro-homology and may catalyze SV formation. An integrative approach using experimental analyses to train computational SV calling is essential for the accurate resolution of the architecture of SVs. We find considerable complexity in SV formation; about a quarter of SVs in the mouse are composed of a complex mixture of deletion, insertion, inversion and copy number gain. Computational methods can be adapted to identify most paired-end mapping patterns.
Article
The mouse (Mus musculus) is the premier animal model for understanding human disease and development. Here we show that a comprehensive understanding of mouse biology is only possible with the availability of a finished, high-quality genome assembly. The finished clone-based assembly of the mouse strain C57BL/6J reported here has over 175,000 fewer gaps and over 139 Mb more of novel sequence, compared with the earlier MGSCv3 draft genome assembly. In a comprehensive analysis of this revised genome sequence, we are now able to define 20,210 protein-coding genes, over a thousand more than predicted in the human genome (19,042 genes). In addition, we identified 439 long, non-protein-coding RNAs with evidence for transcribed orthologs in human. We analyzed the complex and repetitive landscape of 267 Mb of sequence that was missing or misassembled in the previously published assembly, and we provide insights into the reasons for its resistance to sequencing and assembly by whole-genome shotgun approaches. Duplicated regions within newly assembled sequence tend to be of more recent ancestry than duplicates in the published draft, correcting our initial understanding of recent evolution on the mouse lineage. These duplicates appear to be largely composed of sequence regions containing transposable elements and duplicated protein-coding genes; of these, some may be fixed in the mouse population, but at least 40% of segmentally duplicated sequences are copy number variable even among laboratory mouse strains. Mouse lineage-specific regions contain 3,767 genes drawn mainly from rapidly-changing gene families associated with reproductive functions. The finished mouse genome assembly, therefore, greatly improves our understanding of rodent-specific biology and allows the delineation of ancestral biological functions that are shared with human from derived functions that are not.
Article
The broad aim of biomedical science in the postgenomic era is to link genomic and phenotype information to allow deeper understanding of the processes leading from genomic changes to altered phenotype and disease. The EuroPhenome project (http://www.EuroPhenome.org) is a compre- hensive resource for raw and annotated high- throughput phenotyping data arising from projects such as EUMODIC. EUMODIC is gathering data from the EMPReSSslim pipeline (http://www.empress .har.mrc.ac.uk/) which is performed on inbred mouse strains and knock-out lines arising from the EUCOMM project. The EuroPhenome interface allows the user to access the data via the phenotype or genotype. It also allows the user to access the data in a variety of ways, including graphical display, statistical analysis and access to the raw data via web services. The raw phenotyping data captured in EuroPhenome is annotated by an annotation pipeline which automatically identifies statistically different mutants from the appropriate baseline and assigns ontology terms for that specific test. Mutant phenotypes can be quickly identified using two EuroPhenome tools: PhenoMap, a graphical representation of statistically relevant phenotypes,and mining for a mutant using ontology terms. To assist with data definition and cross-database comparisons, phenotype data is annotated using combinations of terms from biological ontologies.
Data
a b s t r a c t Comprehensive phenotyping will be required to reveal the pleiotropic functions of a gene and to uncover the wider role of genetic loci within diverse biological systems. The challenge will be to devise phenotyp-ing approaches to characterise the thousands of mutants that are being generated as part of international efforts to acquire a mutant for every gene in the mouse genome. In order to acquire robust datasets of broad based phenotypes from mouse mutants it is necessary to design and implement pipelines that incorporate standardised phenotyping platforms that are validated across diverse mouse genetics centres or mouse clinics. We describe here the rationale and methodology behind one phenotyping pipeline, EMPReSSslim, that was designed as part of the work of the EUMORPHIA and EUMODIC consortia, and which exemplifies some of the challenges facing large-scale phenotyping. EMPReSSslim captures a broad range of data on diverse biological systems, from biochemical to physiological amongst others. Data cap-ture and dissemination is pivotal to the operation of large-scale phenotyping pipelines, including the def-inition of parameters integral to each phenotyping test and the associated ontological descriptions. EMPReSSslim data is displayed within the EuroPhenome database, where a variety of tools are available to allow the user to search for interesting biological or clinical phenotypes.
Article
The sequence of the mouse genome is a key informational tool for understanding the contents of the human genome and a key experimental tool for biomedical research. Here, we report the results of an international collaboration to produce a high-quality draft sequence of the mouse genome. We also present an initial comparative analysis of the mouse and human genomes, describing some of the insights that can be gleaned from the two sequences. We discuss topics including the analysis of the evolutionary forces shaping the size, structure and sequence of the genomes; the conservation of large-scale synteny across most of the genomes; the much lower extent of sequence orthology covering less than half of the genomes; the proportions of the genomes under selection; the number of protein-coding genes; the expansion of gene families related to reproduction and immunity; the evolution of proteins; and the identification of intraspecies polymorphism.