Global biogeography of SAR11 marine bacteria
نویسندگان
چکیده
منابع مشابه
Global biogeography of SAR11 marine bacteria
The ubiquitous SAR11 bacterial clade is the most abundant type of organism in the world's oceans, but the reasons for its success are not fully elucidated. We analysed 128 surface marine metagenomes, including 37 new Antarctic metagenomes. The large size of the data set enabled internal transcribed spacer (ITS) regions to be obtained from the Southern polar region, enabling the first global cha...
متن کاملOne Carbon Metabolism in SAR11 Pelagic Marine Bacteria
The SAR11 Alphaproteobacteria are the most abundant heterotrophs in the oceans and are believed to play a major role in mineralizing marine dissolved organic carbon. Their genomes are among the smallest known for free-living heterotrophic cells, raising questions about how they successfully utilize complex organic matter with a limited metabolic repertoire. Here we show that conserved genes in ...
متن کاملDiversity and depth-specific distribution of SAR11 cluster rRNA genes from marine planktonic bacteria.
Small-subunit (SSU) ribosomal DNA (rDNA) gene clusters are phylogenetically related sets of SSU rRNA genes, commonly encountered in genes amplified from natural populations. Genetic variability in gene clusters could result from artifacts (polymerase error or PCR chimera formation), microevolution (variation among rrn copies within strains), or macroevolution (genetic divergence correlated with...
متن کاملA new method for studying the evolutionary origin of the SAR11 clade marine bacteria.
The free-living SAR11 clade is a globally abundant group of oceanic Alphaproteobacteria, with small genome sizes and rich genomic A+T content. However, the taxonomy of SAR11 has become controversial recently. Some researchers argue that the position of SAR11 is a sister group to Rickettsiales. Other researchers advocate that SAR11 is located within free-living lineages of Alphaproteobacteria. H...
متن کاملThe global biogeography of amino acid variants within a single SAR11 population is governed by natural selection
The diversity and geographical distribution of populations within major marine microbial lineages are largely governed by temperature and its co-variables. However, neither the mechanisms by which genomic heterogeneity emerges within a single population nor how it drives the partitioning of ecological niches are well understood.. Here we took advantage of billions of metagenomic reads to study ...
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ژورنال
عنوان ژورنال: Molecular Systems Biology
سال: 2012
ISSN: 1744-4292,1744-4292
DOI: 10.1038/msb.2012.28