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Syntrophic propionate-oxidizing bacteria in methanogenic systems

Westerholm, Maria and Calusinska, Magdalena and Dolfing, Jan (2022). Syntrophic propionate-oxidizing bacteria in methanogenic systems. FEMS Microbiology Reviews. 46 :2 , fuab057
[Article Review/Survey]

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This review summarizes discoveries in syntrophic propionate degradation research and reveals intriguing metabolic capabilities, mechanisms of cooperation and environmentally driven kinetics by taxonomically distinct microorganisms that are important for biotechnological applications and biogenic methane emissions.The mutual nutritional cooperation underpinning syntrophic propionate degradation provides a scant amount of energy for the microorganisms involved, so propionate degradation often acts as a bottleneck in methanogenic systems. Understanding the ecology, physiology and metabolic capacities of syntrophic propionate-oxidizing bacteria (SPOB) is of interest in both engineered and natural ecosystems, as it offers prospects to guide further development of technologies for biogas production and biomass-derived chemicals, and is important in forecasting contributions by biogenic methane emissions to climate change. SPOB are distributed across different phyla. They can exhibit broad metabolic capabilities in addition to syntrophy (e.g. fermentative, sulfidogenic and acetogenic metabolism) and demonstrate variations in interplay with cooperating partners, indicating nuances in their syntrophic lifestyle. In this review, we discuss distinctions in gene repertoire and organization for the methylmalonyl-CoA pathway, hydrogenases and formate dehydrogenases, and emerging facets of (formate/hydrogen/direct) electron transfer mechanisms. We also use information from cultivations, thermodynamic calculations and omic analyses as the basis for identifying environmental conditions governing propionate oxidation in various ecosystems. Overall, this review improves basic and applied understanding of SPOB and highlights knowledge gaps, hopefully encouraging future research and engineering on propionate metabolism in biotechnological processes.

Authors/Creators:Westerholm, Maria and Calusinska, Magdalena and Dolfing, Jan
Title:Syntrophic propionate-oxidizing bacteria in methanogenic systems
Series Name/Journal:FEMS Microbiology Reviews
Year of publishing :2022
Article number:fuab057
Number of Pages:26
Publication Type:Article Review/Survey
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Microbiology (Microbiology in the medical area to be 30109)
Keywords:propionic acid, syntrophy, methanogenesis, methylmalonyl-CoA pathway, interspecies electron transfer, anaerobic digestion
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Additional ID:
Type of IDID
Web of Science (WoS)000763637200007
ID Code:27439
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Molecular Sciences
Deposited By: SLUpub Connector
Deposited On:25 Mar 2022 11:25
Metadata Last Modified:25 Mar 2022 11:31

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