Article

[Mutation analysis of the androgen receptor gene in a complete androgen insensitivity syndrome family].

Central Laboratory, Shenzhen Maternity and Child Healthcare Hospital, Shenzhen, Guangdong, 518048 PR China.
Zhonghua yi xue yi chuan xue za zhi = Zhonghua yixue yichuanxue zazhi = Chinese journal of medical genetics 12/2009; 26(6):606-9. DOI:10.3760/cma.j.issn.1003-9406.2009.06.001 pp.606-9
Source: PubMed

ABSTRACT To study the mutation of the androgen receptor gene in a family with complete androgen insensitivity syndrome and to explore the pathogenicity of the mutation.
PCR and DNA sequencing were performed to study the AR gene mutation; Mbo I restriction endonuclease was used to detect existence of the mutation in normal controls; conservation of the mutation site was analyzed by comparison of the sequence of amino acid among different species.
The DNA sequence of the three patients contained the same substitution of a single nucleotide on codon 681 GAG to GAT of exon 4, which located in the ligand binding domain of the AR receptor and led to substitution of glutamic acid to aspartic acid in the AR receptor. Their mother was heterozygote of E681D. E681D was not observed in the normal controls. The E681 site was extremely conservative in different species.
The E681D mutation of the AR gene is a novel mutation of leading to complete androgen insensitivity syndrome.

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Keywords

amino acid
 
androgen receptor gene
 
AR gene
 
AR gene mutation
 
AR receptor
 
aspartic acid
 
complete androgen insensitivity syndrome
 
different species
 
DNA sequence
 
DNA sequencing
 
E681D mutation
 
exon 4
 
GAT
 
glutamic acid
 
ligand binding domain
 
Mbo
 
mutation site
 
novel mutation
 
single nucleotide
 
three patients