Anaerobic bacterial degradation of protein and lipid macromolecules in subarctic marine sediment.

ABSTRACT: Microorganisms in marine sediments play major roles in marine biogeochemical cycles by mineralizing substantial quantities of organic matter from decaying cells. Proteins and lipids are abundant components of necromass, yet the taxonomic identities of microorganisms that actively degrade them remain poorly resolved. Here, we revealed identities, trophic interactions, and genomic features of bacteria that degraded ¹³C-labeled proteins and lipids in cold anoxic microcosms containing sulfidic subarctic marine sediment. Supplemented proteins and lipids were rapidly fermented to various volatile fatty acids within 5 days. DNA-stable isotope probing (SIP) suggested Psychrilyobacter atlanticus was an important primary degrader of proteins, and Psychromonas members were important primar

SUBMITTER: Pelikan C 

PROVIDER: S-EPMC8027456 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature