Back to Search
Start Over
A novel bacterial sulfite dehydrogenase that requires three c-type cytochromes for electron transfer.
- Source :
-
Applied & Environmental Microbiology . Oct2023, Vol. 89 Issue 10, p1-18. 18p. - Publication Year :
- 2023
-
Abstract
- c-type Cytochromes (c-Cyts), primarily as electron carriers and oxidoreductases, play a key role in energy transduction processes in virtually all living organisms. Many bacteria, such as Shewanella oneidensis, are particularly rich in c-Cyts, supporting respiratory versatility not seen in eukaryotes. Unfortunately, a large number of c-Cyts are underexplored, and their biological functions remain unknown. In this study, we identify SorCABD of S. oneidensis as a novel sulfite dehydrogenase (SDH), which catalyzes the oxidation of sulfite to sulfate. In addition to catalytic subunit SorA, this enzymatic complex includes three c-Cyt subunits, which all together carry out electron transfer. The electrons extracted from sulfite oxidation are ultimately delivered to oxygen, leading to oxygen reduction, a process relying on terminal oxidase cyt cbb3. Genomic analysis suggests that the homologs of this SDH are present in a small number of bacterial genera, Shewanella and Vibrio in particular. Because these bacteria are generally capable of reducing sulfite under anaerobic conditions, the co-existence of a sulfite oxidation system implies that they may play especially important roles in the transformation of sulfur species in natural environments. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00992240
- Volume :
- 89
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Applied & Environmental Microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 173546416