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


Kunin, V; Raes, J; Harris, J K; Spear, J R; Walker, J J; Ivanova, N; von Mering, C; Bebout, B M; Pace, N R; Bork, P; Hugenholtz, P (2008). Millimeter-scale genetic gradients and community-level molecular convergence in a hypersaline microbial mat. Molecular Systems Biology, 4:198.

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.

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.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Molecular Life Sciences
08 University Research Priority Programs > Systems Biology / Functional Genomics
Dewey Decimal Classification:570 Life sciences; biology
Language:English
Date:2008
Deposited On:08 Mar 2009 19:08
Last Modified:06 Dec 2017 18:52
Publisher:Nature Publishing Group
ISSN:1744-4292
Free access at:PubMed ID. An embargo period may apply.
Publisher DOI:https://doi.org/10.1038/msb.2008.35
PubMed ID:18523433

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