A Cytochrome c-Containing Periplasmic Nitrate Reductase in the Acetogen Sporomusa ovata.

ABSTRACT: Sporomusa ovata is one of the few acetogenic bacteria that have cytochromes and quinones, but their role is unknown. In addition to reducing CO₂ to acetate, S. ovata can also use nitrate as an alternative electron acceptor, but the enzymes involved, a possible function of cytochromes and quinones and the bioenergetics of nitrate reduction remain elusive. Under heterotrophic and autotrophic growth conditions, the presence of nitrate led to higher optical densities and decreased acetate production. Under heterotrophic conditions with fructose as an electron donor, nitrate was preferred over CO₂ as an electron acceptor. Under autotrophic conditions with H₂ as an electron donor, nitrate and CO₂ were used simultaneously. Genome analyses revealed a nit

SUBMITTER: Waschinger LM 

PROVIDER: S-EPMC12780646 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature