New bacterial and archaeal lineages discovered in organic rich sediments of a large tropical Bay

Tschoeke Diogo A.; Coutinho Felipe H.; Leomil Luciana; Cavalcanti Giselle; Silva Bruno S.; Garcia Gizele D.; dos Anjos Leandro Candeia; Nascimento Larissa Borges; Moreira Luciane S.; Otsuki Koko; Cordeiro Renato C.; Rezende Carlos E.; Thompson Fabiano L.; Thompson Cristiane C.

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New bacterial and archaeal lineages discovered in organic rich sediments of a large tropical Bay

机译：在大型热带湾的有机丰富沉积物中发现了新的细菌和古血管谱系

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The nutrient and oxygen gradient present in marine sediments promotes high levels of microbial diversity. We applied metagenomics and biogeochemical tools to analyze microbial communities in different sediment depths (0-4 m below sea floor, mbsf) from Guanabara Bay, Brazil, a brackish tropical ecosystem with a history of massive anthropogenic impacts, and a largely unknown sediment microbial diversity. Methanogens (e.g. Methanosarcinales, Methanomicrobiales) were more abundant at 1 mbsf, while sulphate-reducing microbes (Desulfurococcales, Thermoprotales, and Sulfolobales) were more abundant at deeper layers (4 mbsf; corresponding to 3 K Radiocarbon years before present, Holocene Epoch). Taxonomic analyzes and functional gene identification associated with anaerobic methane oxidation (e.g. monomethylamine methyltransferase (mtmB), trimethylamine methyltransferase (mttB) and CO dehydrogenase/acetyl-CoA synthase delta subunit) and sulfate reduction indicated the dominance of Campylobacteria (Sulfurimonas) at deeper sediment layers. Gene sequences related to assimilation of inorganic sulfur increased with depth, while organic sulfur related sequences decrease, accompanying the clear reduction in the concentration of sulfur, organic carbon and chla torwards deeper layers. Analyzes of metagenome assembled genomes also led to the discovery of a novel order within the phylum Acidobacteriota, named Guanabacteria. This novel order had several in silico phenotyping features that differentiate it from closely related phylogenetic neighbors (e.g. Acidobacteria, Aminicenantes, and Thermoanaerobaculum), including several genes (carbon monoxide dehydrogenase, CO dehydrogenase/CO-methylating acetyl-CoA synthase complex subunit beta, heterodisulfide reductase, sulfite exporter TauE/SafE family protein, sulfurtransferase) that relevant for the S and C cycles. Furthermore, the recovered Bathyarchaeota genome SS9 illustrates the methanogenic potential in deeper sediment layer.

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来源
《Marine genomics》 |2020年第1期|共12页
作者
Tschoeke Diogo A.; Coutinho Felipe H.; Leomil Luciana; Cavalcanti Giselle; Silva Bruno S.; Garcia Gizele D.; dos Anjos Leandro Candeia; Nascimento Larissa Borges; Moreira Luciane S.; Otsuki Koko; Cordeiro Renato C.; Rezende Carlos E.; Thompson Fabiano L.; Thompson Cristiane C.;
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作者单位

Univ Fed Rio De Janeiro UFRJ Inst Biol Lab Microbiol Rio De Janeiro RJ Brazil;

Univ Fed Rio De Janeiro UFRJ Inst Biol Lab Microbiol Rio De Janeiro RJ Brazil;

Univ Fed Rio De Janeiro UFRJ Inst Biol Lab Microbiol Rio De Janeiro RJ Brazil;

Univ Fed Rio De Janeiro UFRJ Inst Biol Lab Microbiol Rio De Janeiro RJ Brazil;

Univ Fed Rio De Janeiro UFRJ Inst Biol Lab Microbiol Rio De Janeiro RJ Brazil;

Univ Fed Rio De Janeiro UFRJ Inst Biol Lab Microbiol Rio De Janeiro RJ Brazil;

Univ Fed Fluminense Inst Quim Dept Geoquim Programa Geoquim Niteroi RJ Brazil;

Univ Fed Fluminense Inst Quim Dept Geoquim Programa Geoquim Niteroi RJ Brazil;

Univ Fed Fluminense Inst Quim Dept Geoquim Programa Geoquim Niteroi RJ Brazil;

Univ Fed Rio De Janeiro UFRJ Inst Biol Lab Microbiol Rio De Janeiro RJ Brazil;

Univ Fed Fluminense Inst Quim Dept Geoquim Programa Geoquim Niteroi RJ Brazil;

Univ Estadual Norte Fluminense UENF Ctr Biociencias &

Biotecnol Lab Ciencias Ambientais Campos Dos Goytacazes RJ Brazil;

Univ Fed Rio De Janeiro UFRJ Inst Biol Lab Microbiol Rio De Janeiro RJ Brazil;

Univ Fed Rio De Janeiro UFRJ Inst Biol Lab Microbiol Rio De Janeiro RJ Brazil;

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原文格式 PDF
正文语种 eng
中图分类遗传学;
关键词
Guanabara Bay; Metagenome; Genome; Guanabacteria;

机译：Guanabara湾;梅塔群;基因组;偶齐;

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New bacterial and archaeal lineages discovered in organic rich sediments of a large tropical Bay

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