Microbiological Research (MICROBIOL RES)

Publisher: Elsevier

Journal description

Microbiological Research is an international journal devoted to publishing original research papers, reviews and short communications on prokaryotic and eukaryotic microorganisms, Bacteria, Archaea, Mycota and uni-cellular organisms. Microbiological Research covers articles from many facets of microbiology: antimicrobial drugs - biochemistry - biotechnology - environmental microbiology - genetics - molecular biology - molecular diagnosis - phylogeny - physiology - phytopatholgy - systematics and taxonomy.

Current impact factor: 2.56

Impact Factor Rankings

2016 Impact Factor Available summer 2017
2014 / 2015 Impact Factor 2.561
2013 Impact Factor 1.939
2012 Impact Factor 1.993
2011 Impact Factor 2.308
2010 Impact Factor 1.958
2009 Impact Factor 1.771
2008 Impact Factor 2.054
2007 Impact Factor 1.535
2006 Impact Factor 0.798
2005 Impact Factor 0.862
2004 Impact Factor 0.663
2003 Impact Factor 0.573
2002 Impact Factor 0.549
2001 Impact Factor 0.531
2000 Impact Factor 0.382
1999 Impact Factor 0.516
1998 Impact Factor 0.496
1997 Impact Factor 0.544

Impact factor over time

Impact factor
Year

Additional details

5-year impact 2.47
Cited half-life 5.90
Immediacy index 0.53
Eigenfactor 0.00
Article influence 0.64
Website Microbiological Research website
Other titles Microbiological research (Online)
ISSN 0944-5013
OCLC 51232007
Material type Document, Periodical, Internet resource
Document type Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

Elsevier

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Authors pre-print on any website, including arXiv and RePEC
    • Author's post-print on author's personal website immediately
    • Author's post-print on open access repository after an embargo period of between 12 months and 48 months
    • Permitted deposit due to Funding Body, Institutional and Governmental policy or mandate, may be required to comply with embargo periods of 12 months to 48 months
    • Author's post-print may be used to update arXiv and RepEC
    • Publisher's version/PDF cannot be used
    • Must link to publisher version with DOI
    • Author's post-print must be released with a Creative Commons Attribution Non-Commercial No Derivatives License
    • Publisher last reviewed on 03/06/2015
  • Classification
    green

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Several members of the Acinetobacter spp. produce exobiopolymer (EBP) of considerable biotechnological interest. In a previous study, we reported phosphate removal capacity of EBP produced by Acinetobacter haemolyticus. Insertional mutagenesis was attempted to develop EBP-overproducing strains of A. haemolyticus and mutant MG606 was isolated. In order to understand the underlying mechanism of overproduction, the EBP overproducing mutant MG606 was analyzed and compared with the wild type counterpart for its key EBP synthetic enzymes. The EBP produced by MG606 mutant was 650 mg/L compared to 220 mg/L in its wild type counterpart. Significantly high (p < 0.05) levels of phosphoglucomutase/phosphomannomutase (PGM/PMM) in MG606 mutant was noted, whereas activities of other enzymes responsible for EBP synthesis showed no significant change (p > 0.05). The up-regulation of PGM/PMM expression in mutant was further confirmed by real time reverse transcriptase (RT)-PCR of PGM/PMM transcripts. The optimal conditions for PGM/PMM activity were found to be 35 °C and pH 7.5; PGM/PMM activity was inhibited by ions such as lithium, zinc, nickel. Further, incubation of cells with a PGM inhibitor (lithium) resulted in a concentration-dependent decrease in EBP production further confirming the role of PGM/PMM overexpression in enhanced EBP production by the mutant. Overall the results of our study indicate a key role of PGM/PMM in enhanced EBP production, as evident from enhanced enzyme activity, increased PGM/PMM transcripts and reduction in EBP synthesis by a PGM inhibitor. We envisage a potential exploitation of the insights so obtained to effectively engineer strains of Acinetobacter for overproducing phosphate binding EBP.
    No preview · Article · Dec 2015 · Microbiological Research
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    ABSTRACT: Ribosomal proteins (RPs), are essential components of the ribosomes, the molecular machines that turn mRNA blueprints into proteins, as they serve to stabilize the structure of the rRNA, thus improving protein biosynthesis. In addition, growing evidence suggests that RPs can function in other cellular roles. In the present review, we summarize several potential extra-ribosomal functions of RPs in ribosomal biogenesis, transcription activity, translation process, DNA repair, replicative life span, adhesive growth, and morphological transformation in Saccharomyces cerevisiae. However, the future in-depth studies are needed to identify these novel secondary functions of RPs in S. cerevisiae. Copyright © 2015 Elsevier GmbH. All rights reserved.
    No preview · Article · Aug 2015 · Microbiological Research
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    ABSTRACT: The roots of ericaceous plants harbour a diversity of fungal taxa, which confer eco-physiological benefits to the host. Some of the fungi have been established to form ericoid mycorrhizal (ERM) associations and enhance plant growth in certain ericaceous genera. Although, Lachnum and Cadophora isolates have frequently been identified from the roots of this family, the status of their association and functional roles is still vague. The aims of this study were to identify Lachnum and Cadophora isolates; determine the root-fungal interactive structures formed in associations with Vaccinium corymbosum L. (blueberry) hosts and to examine inoculation effects of the fungal associates using several varieties of the blueberry. Lachnum and Cadophora were isolated and identified from Erica cerinthoides L. and Erica demmissa Klotzsch ex Benth using morphological and molecular techniques. Micropropagated blueberry varieties (Bluecrop, Elliott, Spartan, Chandler and Brightwell) were inoculated with respective fungi and plant growth evaluated. Both fungi colonised the roots and did not have any pathogenic effect. Lachnum isolate did not form any particular mycorrhizal structures whereas; Cadophora inoculated plants showed typical ericoid mycorrhizal coils. Inoculation with both fungi enhanced the shoot growth of Brightwell and Elliott varieties. However neutral effects were observed in the remaining varieties. In conclusion, Cadophora and Lachnum isolates have potential to promote growth of selected blueberry varieties.
    No preview · Article · Aug 2015 · Microbiological Research
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    ABSTRACT: Bacillus subtilis NCD-2 is an excellent biocontrol agent for tomato gray mold and cotton soil-borne diseases. The fengycin lipopeptides serve as a major role in its biocontrol ability. A previous study revealed that insertion of degQ with the mini-Tn10 transposon decreased the antifungal activity of strain NCD-2 against the growth of Botrytis cinerea. To clarify the regulation of degQ on the production of fengycin, we deleted degQ by in-frame mutagenesis. Compared with the wild-type strain NCD-2, the degQ-null mutant had decreased extracellular protease and cellulase activities as well as antifungal ability against the growth of B. cinerea in vitro. The lipopeptides from the degQ-null mutant also had significantly decreased antifungal activity against B. cinerea in vitro and in vivo. This result was confirmed by the decreased fengycin production in the degQ-null mutant that was detected by fast protein liquid chromatography analysis. Quantitative reverse transcription PCR further demonstrated that degQ positively regulated the expression of the fengycin synthetase gene. In addition, the degQ-null mutant also had a flatter colony phenotype and significantly decreased biofilm formation ability relative to the wild-type strain. All of those characteristics from degQ-null mutant could be restored to the strain NCD-2 wild-type level by complementation of intact degQ in the mutant. Therefore, DegQ may be an important regulator of fengycin production and biofilm formation in B. subtilis NCD-2. Copyright © 2015 Elsevier GmbH. All rights reserved.
    No preview · Article · Jul 2015 · Microbiological Research
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    ABSTRACT: The H. marmoreus laccase gene (lcc1) sequence was cloned and analyzed. The genomic DNA of lcc1 is 2336 bp, comprising 13 introns and 14 exons. The 1626-bp full-length cDNA encodes a mature laccase protein containing 542 amino acids, with a 21-amino acid signal peptide. Phylogenetic analysis showed that the lcc1 amino acid sequence is homologous to basidiomycete laccases and shares the highest similarity with Flammulina velutipes laccase. A 2021-bp promoter sequence containing a TATA box, CAAT box, and several putative cis-acting elements was also identified. To study the function of lcc1, we first overexpressed lcc1 in H. marmoreus and found that the transgenic fungus producing recombinant laccase displayed faster mycelial growth than the wt strain. Additionally, primordium initiation was induced 3-5 days earlier in the transgenic fungus, and fruiting body maturation was also promoted approximately five days earlier than in the wt strain. Furthermore, we detected that lcc1 was sustainably overexpressed and that laccase activity was also higher in the transgenic strains compared with the wt strain during development in H. marmoreus. These results indicate that the H. marmoreus lcc1 gene is involved in mycelial growth and fruiting body initiation by increasing laccase activity.
    No preview · Article · Jun 2015 · Microbiological Research
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    ABSTRACT: Periodontal pathogens, including Porphyromonas gingivalis, can form biofilms in dental pockets and cause inflammation, which is one of the underlying mechanisms involved in the development of periodontal disease, ultimately leading to tooth loss. Although P. gingivalis is protected in the biofilm, it can still cause damage and modulate inflammatory responses from the host, through secretion of microvesicles containing proteinases. The aim of this study was to evaluate the role of cysteine proteinases in P. gingivalis colony growth and development, and subsequent immunomodulatory effects on human gingival fibroblast. By comparing the wild type W50 with its gingipain deficient strains we show that cysteine proteinases are required by P. gingivalis to form morphologically normal colonies. The lysine-specific proteinase (Kgp), but not arginine-specific proteinases (Rgps), was associated with immunomodulation. P. gingivalis with Kgp affected the viability of gingival fibroblasts and modulated host inflammatory responses, including induction of TGF-β1 and suppression of CXCL8 and IL-6 accumulation. These results suggest that secreted products from P. gingivalis, including proteinases, are able to cause damage and significantly modulate the levels of inflammatory mediators, independent of a physical host-bacterial interaction. This study provides new insight of the pathogenesis of P. gingivalis and suggests gingipains as targets for diagnosis and treatment of periodontitis. Copyright © 2015 Elsevier GmbH. All rights reserved.
    No preview · Article · Jun 2015 · Microbiological Research