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Anaerobic bacterial degradation of protein and lipid macromolecules in subarctic marine sediment
- Source :
- Pelikan, C, Wasmund, K, Glombitza, C, Hausmann, B, Herbold, C W, Flieder, M & Loy, A 2021, ' Anaerobic bacterial degradation of protein and lipid macromolecules in subarctic marine sediment ', ISME Journal, vol. 15, no. 3, pp. 833-847 . https://doi.org/10.1038/s41396-020-00817-6, The ISME Journal, The ISME Journal, 15 (3)
- Publication Year :
- 2021
-
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 primary degraders of both proteins and lipids. Closely related Psychromonas populations, as represented by distinct 16S rRNA gene variants, differentially utilized either proteins or lipids. DNA-SIP also showed 13C-labeling of various Deltaproteobacteria within 10 days, indicating trophic transfer of carbon to putative sulfate-reducers. Metagenome-assembled genomes revealed the primary hydrolyzers encoded secreted peptidases or lipases, and enzymes for catabolism of protein or lipid degradation products. Psychromonas species are prevalent in diverse marine sediments, suggesting they are important players in organic carbon processing in situ. Together, this study provides new insights into the identities, functions, and genomes of bacteria that actively degrade abundant necromass macromolecules in the seafloor.<br />The ISME Journal, 15 (3)<br />ISSN:1751-7362<br />ISSN:1751-7370
- Subjects :
- Geologic Sediments
Microorganism
Deltaproteobacteria
Microbiology
Fusobacteria
Article
Microbial ecology
03 medical and health sciences
RNA, Ribosomal, 16S
Organic matter
Anaerobiosis
Phylogeny
Ecology, Evolution, Behavior and Systematics
030304 developmental biology
Trophic level
chemistry.chemical_classification
0303 health sciences
Environmental microbiology
biology
030306 microbiology
Catabolism
biology.organism_classification
Anoxic waters
Biochemistry
chemistry
Microcosm
Bacteria
Subjects
Details
- Language :
- English
- ISSN :
- 17517362 and 17517370
- Database :
- OpenAIRE
- Journal :
- Pelikan, C, Wasmund, K, Glombitza, C, Hausmann, B, Herbold, C W, Flieder, M & Loy, A 2021, ' Anaerobic bacterial degradation of protein and lipid macromolecules in subarctic marine sediment ', ISME Journal, vol. 15, no. 3, pp. 833-847 . https://doi.org/10.1038/s41396-020-00817-6, The ISME Journal, The ISME Journal, 15 (3)
- Accession number :
- edsair.doi.dedup.....88e1dba28a8c69bb271bea6f9de50ffd