Expanded diversity of microbial groups that shape the dissimilatory sulfur cycle.

The ISME Journal
Karthik AnantharamanJillian F Banfield

Abstract

A critical step in the biogeochemical cycle of sulfur on Earth is microbial sulfate reduction, yet organisms from relatively few lineages have been implicated in this process. Previous studies using functional marker genes have detected abundant, novel dissimilatory sulfite reductases (DsrAB) that could confer the capacity for microbial sulfite/sulfate reduction but were not affiliated with known organisms. Thus, the identity of a significant fraction of sulfate/sulfite-reducing microbes has remained elusive. Here we report the discovery of the capacity for sulfate/sulfite reduction in the genomes of organisms from 13 bacterial and archaeal phyla, thereby more than doubling the number of microbial phyla associated with this process. Eight of the 13 newly identified groups are candidate phyla that lack isolated representatives, a finding only possible given genomes from metagenomes. Organisms from Verrucomicrobia and two candidate phyla, Candidatus Rokubacteria and Candidatus Hydrothermarchaeota, contain some of the earliest evolved dsrAB genes. The capacity for sulfite reduction has been laterally transferred in multiple events within some phyla, and a key gene potentially capable of modulating sulfur metabolism in associated c...Continue Reading

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Jun 26, 2018·Bioinformatics·Lewis M WardWoodward W Fischer
Mar 20, 2018·Nature Reviews. Microbiology·Ursula Hofer
Nov 9, 2019·Environmental Microbiology Reports·Marcus S BrayJennifer B Glass
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Jul 17, 2020·Environmental Science and Pollution Research International·Jitka MaláZuzana Bílková

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Software Mentioned

phylogeny
raxmlHPC
qmo
TASSER
hmmscan
RAxML
CONSENSE
PTHREADS
PHYLIP package
MAFFT

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