Methanogens acquire and bioaccumulate nickel during reductive dissolution of nickelian pyrite.

ABSTRACT: Nickel (Ni) is a key component of the active site metallocofactors of numerous enzymes required for methanogenesis, including [NiFe]-hydrogenase, carbon monoxide dehydrogenase, and methyl CoM reductase, leading to a high demand for Ni among methanogens. However, methanogens often inhabit euxinic environments that favor the sequestration of nickel as metal-sulfide minerals, such as nickelian pyrite [(Ni,Fe)S₂], that have low solubilities and that are not considered bioavailable. Recently, however, several different model methanogens (Methanosarcina barkeri, Methanococcus voltae, Methanococcus maripaludis) were shown to reductively dissolve pyrite (FeS₂) and to utilize dissolution products to meet iron and sulfur biosynthetic demands. Here, using

SUBMITTER: Spietz RL 

PROVIDER: S-EPMC10617489 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature