Cometabolism of ferrihydrite reduction and methyl-dismutating methanogenesis by <i>Methanosarcina mazei</i>.

ABSTRACT: Recent discoveries have shown that some Methanosarcina species can reduce Fe(III), reshaping our understanding of Methanosarcina ecophysiology. However, the specific minerals reduced, the products formed, and the underlying metabolic mechanisms remain elusive. Here, we report on the cometabolic process of Fe(III) reduction and methylotrophic methanogenesis in Methanosarcina mazei zm-15. Biogeochemical and mineralogical analyses were conducted to investigate Fe(III) reduction from three mineral preparations-ferrihydrite, goethite, and hematite. The results revealed that 38% of the 6 mM Fe(III) in ferrihydrite was reduced within 4 days, and this percentage increased to 75% with the addition of 100 µM anthraquinone-2,6-disulfonate (AQDS). Active Fe(III) reduction occurred

SUBMITTER: Guo C 

PROVIDER: S-EPMC11921357 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature