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: | D5ANZ4 |
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| Protein Name: | Cytochrome c1 |
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| Length: | 279 |
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| Molecular Weight: | 30322.00 |
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| Species: | Rhodobacter capsulatus (strain ATCC BAA-309 / NBRC 16581 / SB1003) [272942] |
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| Number of TMSs: | 2 |
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| Location1 / Topology2 / Orientation3: |
Cell membrane1 / Single-pass membrane protein2 |
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| Substrate |
proton |
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1: MKKLLISAVS ALVLGSGAAF ANSNVPDHAF SFEGIFGKYD QAQLRRGFQV YNEVCSACHG
61: MKFVPIRTLA DDGGPQLDPT FVREYAAGLD TIIDKDSGEE RDRKETDMFP TRVGDGMGPD
121: LSVMAKARAG FSGPAGSGMN QLFKGMGGPE YIYNYVIGFE ENPECAPEGI DGYYYNKTFQ
181: IGGVPDTCKD AAGVKITHGS WARMPPPLVD DQVTYEDGTP ATVDQMAQDV SAFLMWAAEP
241: KLVARKQMGL VAMVMLGLLS VMLYLTNKRL WAPYKGHKA