Proteins of this family are the transmembrane subunit of the quinone-interacting membrane-bound oxidoreductase complex, which consists of the QmoA, QmoB, and QmoC proteins. It has been reported that the QmoABC complex is essential for efficiently delivering electron to adenosine 5'-phosphosulfate reductase AprAB, which is important in sulfate reduction in sulfate reducing prokaryotes (SRPs).
Lu S et al.(2020). "CDD/SPARCLE: the conserved domain database in 2020.",