Sulfide production and oxidation by heterotrophic bacteria under aerobic conditions.

ABSTRACT: Sulfide (H₂S, HS^- and S^2-) oxidation to sulfite and thiosulfate by heterotrophic bacteria, using sulfide:quinone oxidoreductase (SQR) and persulfide dioxygenase (PDO), has recently been reported as a possible detoxification mechanism for sulfide at high levels. Bioinformatic analysis revealed that the sqr and pdo genes were common in sequenced bacterial genomes, implying the sulfide oxidation may have other physiological functions. SQRs have previously been classified into six types. Here we grouped PDOs into three types and showed that some heterotrophic bacteria produced and released H₂S from organic sulfur into the headspace during aerobic growth, and others, for example, Pseudomonas aeruginosa PAO1, with sqr and pdo did not release H₂

SUBMITTER: Xia Y 

PROVIDER: S-EPMC5702731 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature