3.D.3.1.2
Proton pumping cytochrome bc1 complex of 3 dissimilar subunits, PetABC. The pathway of transmembrane electron transfer has been determined and compared with that of the B6f complex from the same organism which is strikingly different (Bhaduri et al. 2017). The cryo-EM structure of the four-subunit Rhodobacter sphaeroides cytochrome bc1 complex in styrene maleic acid nanodiscs has been solved (Swainsbury et al. 2023). The additional subunit is called subunit IV which is one of up to eight supernumerary subunits that modify the function of the CytBC1 complex in mitochondria (Swainsbury et al. 2023).
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| Accession Number: | P0CY48 |
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| Protein Name: | Ubiquinol-cytochrome c reductase iron-sulfur subunit |
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| Length: | 191 |
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| Molecular Weight: | 20416.00 |
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| Species: | Rhodobacter capsulatus [1061] |
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| Number of TMSs: | 1 |
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| Location1 / Topology2 / Orientation3: |
Cell membrane1 / Single-pass membrane protein2 |
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| Substrate |
proton |
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1: MSHAEDNAGT RRDFLYHATA ATGVVVTGAA VWPLINQMNA SADVKAMSSI FVDVSAVEVG
61: TQLTVKWRGK PVFIRRRDEK DIELARSVPL GALRDTSAEN ANKPGAEATD ENRSLAAFDG
121: TNTGEWLVML GVCTHLGCVP MGDKSGDFGG WFCPCHGSHY DSAGRIRKGP APRNLDIPVA
181: AFVDETTIKL G