Anaerobic Hydrocarbon-Degrading Deltaproteobacteria

Genome-Centric Metatranscriptomics Reveals Multiple Co-occurring Routes for Hydrocarbon Degradation in Chronically Contaminated Marine Microbial Mats

“…Our multiomic results also indicate the occurrence and probable activity of various anaerobic hydrocarbon degraders including members of the Desulfobacterota and Bacteroidetes phyla. Desulfobacterota are frequently identified as hydrocarbon degraders in petroleum-rich marine or brackish sediments, ,, and members of the Bacteroidetes phylum, such as Mariniphaga and Marinilabiliaceae lineages, detected in the microbial mats, have been previously associated with hydrocarbon-polluted sites. , Bacteroidetes were also identified as significant marine hydrocarbon degraders during the Deep Horizon oil spill, supporting their activity in our microbial mats. Potential anaerobic hydrocarbon degradation genes were also identified in poorly explored lineages (KSB-1, Krumholzibacteria ), supporting previous observations in hydrothermal sediments of the Guaymas basin and in the chronically oil polluted sediments of the Persian Gulf, and extending the distribution of these hydrocarbon-degrading lineages to shallow microbial mats.…”

“…Our multiomic results also indicate the occurrence and probable activity of various anaerobic hydrocarbon degraders including members of the Desulfobacterota and Bacteroidetes phyla. Desulfobacterota are frequently identified as hydrocarbon degraders in petroleum-rich marine or brackish sediments, 11,14,60 and members of the Bacteroidetes phylum, such as Mariniphaga and Marinilabiliaceae lineages, detected in the microbial mats, have been previously associated with hydrocarbon-polluted sites. 61,62 Bacteroidetes were also identified as significant marine hydrocarbon degraders during the Deep Horizon oil spill, 63 supporting their activity in our microbial mats.…”

“…Various mono- and dioxygenases (BphAB, NdoBC, and TmoAB) are also involved in aromatic hydrocarbon degradation, allowing crude oil degradation. By contrast, in long-term hydrocarbon-rich marine sediments, such as cold seeps, oxygen is rapidly consumed and anaerobic hydrocarbon-degrading lineages such as various members of the Desulfobacteraceae family are frequently observed. − Anaerobic hydrocarbon degradation pathways identified so far involve anaerobic carboxylases (AbcA), hydroxylases (AhyA, EbdA, and CmdA) or glycyl-radical proteins such as alkyl-succinate synthases (Ass/Bss/Nms) that activate hydrocarbon degradation by fumarate addition …”

Environmental heterogeneity shapes the C and S cycling-associated microbial community in Haima's cold seeps

“…SRB directly participates in the biogeochemical cycle of carbon and sulfur (Fukui et al, 1999 ; Kleindienst et al, 2014 ; Jaekel et al, 2015 ; Davidova et al, 2019 ), showing a clear aggregate-specific distribution pattern in Haima's cold seep. Syntrophobacteraceae , mediating the transformation of long-chain alkane to carbon dioxide or acetate (Tan et al, 2014a , b ), were the dominant SRB in NS but were absent in MB.B and MV.…”

Análise de voláteis bacterianos promotores do crescimento vegetal

“…As classes Deltaproteobacteria, Epsilonproteobacteria e Zetaproteobacteria são as classes que incluem a menor diversidade de bactérias, compostas por espécies de metabolismo único e complexo, e que sobrevivem em ambientes singulares. As Deltaproteobacterias são compostas pelas mixobacterias aeróbicas e pelas anaeróbias restritas que atuam na redução de enxofre (Desulfuromonas), de ácido férrico (Geobacter) e sulfato (Desulfobacter, Desulfonema, Desulfococcus e Desulfovibrio) 96,97 . Já a Epsilonproteobacteria é uma classe de bactérias patogênicas de menor diversidade, encontrada exclusivamente no microbioma do aparelho digestivo de humanos e animais, como Helicobacter e Campylobacter 98 .…”