Electron transport complex, RnfB/RsxB, Proteobacteria (IPR016463)

Short name: RnfB/RsxB_Proteobac

Overlapping homologous superfamilies


Family relationships


The six subunit complex RnfABCDGE in Rhodobacter capsulatus (Rhodopseudomonas capsulata) encodes an apparent NADH oxidoreductase responsible for electron transport to nitrogenase, necessary for nitrogen fixation [PMID: 8264535, PMID: 9154934, PMID: 10671439]. A closely related complex in Escherichia coli, RsxABCDGE (Reducer of SoxR), reduces the 2Fe-2S-containing superoxide sensor SoxR, active as a transcription factor when oxidised [PMID: 12773378]. This family of putative NADH oxidoreductase complexes exists in many of the same species as the related NQR, a Na(+)-translocating NADH-quinone reductase, but is distinct. This entry describes the B subunit.

This family of proteins is made up of electron transport complex subunit RnfB and RsxB, mainly from Proteobacteria.

GO terms

Biological Process

GO:0022900 electron transport chain

Molecular Function

GO:0051536 iron-sulfur cluster binding

Cellular Component

GO:0005886 plasma membrane

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.