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Millimeter-scale genetic gradients and community-level molecular convergence in a hypersaline microbial mat

Item Type:Article
Title:Millimeter-scale genetic gradients and community-level molecular convergence in a hypersaline microbial mat
Creators Name:Kunin, V. and Raes, J. and Harris, J.K. and Spear, J.R. and Walker, J.J. and Ivanova, N. and von Mering, C. and Bebout, B.M. and Pace, N.R. and Bork, P. and Hugenholtz, P.
Abstract:To investigate the extent of genetic stratification in structured microbial communities, we compared the metagenomes of 10 successive layers of a phylogenetically complex hypersaline mat from Guerrero Negro, Mexico. We found pronounced millimeter-scale genetic gradients that were consistent with the physicochemical profile of the mat. Despite these gradients, all layers displayed near-identical and acid-shifted isoelectric point profiles due to a molecular convergence of amino-acid usage, indicating that hypersalinity enforces an overriding selective pressure on the mat community.
Keywords:Amino Acids, Microbial Genetics, Mexico, Salinity, Selection (Genetics)
Source:Molecular Systems Biology
ISSN:1744-4292
Publisher:Nature Publishing Group (U.K.)
Volume:4
Page Range:198
Date:2008
Official Publication:https://doi.org/10.1038/msb.2008.35
PubMed:View item in PubMed

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