ID A0A3G1CWY9_ARCFO Unreviewed; 379 AA. AC A0A3G1CWY9; DT 13-FEB-2019, integrated into UniProtKB/TrEMBL. DT 13-FEB-2019, sequence version 1. DT 14-DEC-2022, entry version 13. DE RecName: Full=Cytochrome b {ECO:0000256|ARBA:ARBA00013531, ECO:0000256|RuleBase:RU362117}; GN Name=CYTB {ECO:0000313|EMBL:AMM04980.1}; OS Arctocephalus forsteri (New Zealand fur seal) (Arctocephalus australis OS forsteri). OG Mitochondrion {ECO:0000313|EMBL:AMM04980.1}. OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; OC Eutheria; Laurasiatheria; Carnivora; Caniformia; Otariidae; Arctocephalus. OX NCBI_TaxID=29084 {ECO:0000313|EMBL:AMM04980.1}; RN [1] {ECO:0000313|EMBL:AMM04980.1} RP NUCLEOTIDE SEQUENCE. RC STRAIN=NZFS22 {ECO:0000313|EMBL:AMM04980.1}, NZFS23 RC {ECO:0000313|EMBL:AMM04993.1}, and NZFS24 RC {ECO:0000313|EMBL:AMM05006.1}; RX PubMed=27246241; RA Emami-Khoyi A., Hartley D.A., Ross J.G., Murphy E.C., Paterson A.M., RA Cruickshank R.H., Else T.A.; RT "Complete mitochondrial genome of the stoat (Mustela erminea) and New RT Zealand fur seal (Arctocephalus forsteri) and their significance for RT mammalian phylogeny."; RL Mitochondrial DNA A DNA Mapp Seq Anal 27:4597-4599(2016). CC -!- FUNCTION: Component of the ubiquinol-cytochrome c reductase complex CC (complex III or cytochrome b-c1 complex) that is part of the CC mitochondrial respiratory chain. The b-c1 complex mediates electron CC transfer from ubiquinol to cytochrome c. Contributes to the generation CC of a proton gradient across the mitochondrial membrane that is then CC used for ATP synthesis. {ECO:0000256|ARBA:ARBA00002566, CC ECO:0000256|RuleBase:RU362117}. CC -!- COFACTOR: CC Name=heme b; Xref=ChEBI:CHEBI:60344; CC Evidence={ECO:0000256|RuleBase:RU362117}; CC Note=Binds 2 heme groups non-covalently. CC {ECO:0000256|RuleBase:RU362117}; CC -!- COFACTOR: CC Name=heme; Xref=ChEBI:CHEBI:30413; CC Evidence={ECO:0000256|PIRSR:PIRSR038885-2}; CC Note=Binds 2 heme groups non-covalently. CC {ECO:0000256|PIRSR:PIRSR038885-2}; CC -!- SUBUNIT: The cytochrome bc1 complex contains 11 subunits: 3 respiratory CC subunits (MT-CYB, CYC1 and UQCRFS1), 2 core proteins (UQCRC1 and CC UQCRC2) and 6 low-molecular weight proteins (UQCRH/QCR6, UQCRB/QCR7, CC UQCRQ/QCR8, UQCR10/QCR9, UQCR11/QCR10 and a cleavage product of CC UQCRFS1). This cytochrome bc1 complex then forms a dimer. CC {ECO:0000256|ARBA:ARBA00011088}. CC -!- SUBCELLULAR LOCATION: Membrane {ECO:0000256|ARBA:ARBA00004141}; Multi- CC pass membrane protein {ECO:0000256|ARBA:ARBA00004141}. Mitochondrion CC inner membrane {ECO:0000256|ARBA:ARBA00004448}; Multi-pass membrane CC protein {ECO:0000256|ARBA:ARBA00004448}. CC -!- SIMILARITY: Belongs to the cytochrome b family. CC {ECO:0000256|RuleBase:RU362117}. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; KT693354; AMM04980.1; -; Genomic_DNA. DR EMBL; KT693355; AMM04993.1; -; Genomic_DNA. DR EMBL; KT693356; AMM05006.1; -; Genomic_DNA. DR AlphaFoldDB; A0A3G1CWY9; -. DR GO; GO:0005743; C:mitochondrial inner membrane; IEA:UniProtKB-SubCell. DR GO; GO:0045275; C:respiratory chain complex III; IEA:InterPro. DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-UniRule. DR GO; GO:0008121; F:ubiquinol-cytochrome-c reductase activity; IEA:InterPro. DR GO; GO:0022904; P:respiratory electron transport chain; IEA:InterPro. DR CDD; cd00290; cytochrome_b_C; 1. DR CDD; cd00284; Cytochrome_b_N; 1. DR Gene3D; 1.20.810.10; -; 1. DR InterPro; IPR005798; Cyt_b/b6_C. DR InterPro; IPR036150; Cyt_b/b6_C_sf. DR InterPro; IPR005797; Cyt_b/b6_N. DR InterPro; IPR027387; Cytb/b6-like_sf. DR InterPro; IPR030689; Cytochrome_b. DR InterPro; IPR016174; Di-haem_cyt_TM. DR Pfam; PF00032; Cytochrom_B_C; 1. DR Pfam; PF00033; Cytochrome_B; 1. DR PIRSF; PIRSF038885; COB; 1. DR SUPFAM; SSF81648; a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase); 1. DR SUPFAM; SSF81342; Transmembrane di-heme cytochromes; 1. DR PROSITE; PS51003; CYTB_CTER; 1. DR PROSITE; PS51002; CYTB_NTER; 1. PE 3: Inferred from homology; KW Electron transport {ECO:0000256|ARBA:ARBA00022982, KW ECO:0000256|RuleBase:RU362117}; KW Heme {ECO:0000256|ARBA:ARBA00022617, ECO:0000256|PIRSR:PIRSR038885-2}; KW Iron {ECO:0000256|ARBA:ARBA00023004, ECO:0000256|PIRSR:PIRSR038885-2}; KW Membrane {ECO:0000256|ARBA:ARBA00023136, ECO:0000256|RuleBase:RU362117}; KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, KW ECO:0000256|PIRSR:PIRSR038885-2}; KW Mitochondrion {ECO:0000256|ARBA:ARBA00023128, KW ECO:0000256|RuleBase:RU362117}; KW Mitochondrion inner membrane {ECO:0000256|ARBA:ARBA00022792}; KW Respiratory chain {ECO:0000256|ARBA:ARBA00022660, KW ECO:0000256|RuleBase:RU362117}; KW Transmembrane {ECO:0000256|ARBA:ARBA00022692, KW ECO:0000256|RuleBase:RU362117}; KW Transmembrane helix {ECO:0000256|ARBA:ARBA00022989, KW ECO:0000256|RuleBase:RU362117}; KW Transport {ECO:0000256|ARBA:ARBA00022448, ECO:0000256|RuleBase:RU362117}; KW Ubiquinone {ECO:0000256|ARBA:ARBA00023075}. FT TRANSMEM 30..56 FT /note="Helical" FT /evidence="ECO:0000256|RuleBase:RU362117" FT TRANSMEM 77..98 FT /note="Helical" FT /evidence="ECO:0000256|RuleBase:RU362117" FT TRANSMEM 113..133 FT /note="Helical" FT /evidence="ECO:0000256|RuleBase:RU362117" FT TRANSMEM 140..158 FT /note="Helical" FT /evidence="ECO:0000256|RuleBase:RU362117" FT TRANSMEM 178..200 FT /note="Helical" FT /evidence="ECO:0000256|RuleBase:RU362117" FT TRANSMEM 229..246 FT /note="Helical" FT /evidence="ECO:0000256|RuleBase:RU362117" FT TRANSMEM 288..308 FT /note="Helical" FT /evidence="ECO:0000256|RuleBase:RU362117" FT TRANSMEM 320..340 FT /note="Helical" FT /evidence="ECO:0000256|RuleBase:RU362117" FT TRANSMEM 346..372 FT /note="Helical" FT /evidence="ECO:0000256|RuleBase:RU362117" FT DOMAIN 1..209 FT /note="CYTB_NTER" FT /evidence="ECO:0000259|PROSITE:PS51002" FT DOMAIN 210..379 FT /note="CYTB_CTER" FT /evidence="ECO:0000259|PROSITE:PS51003" FT BINDING 83 FT /ligand="heme b" FT /ligand_id="ChEBI:CHEBI:60344" FT /ligand_label="b562" FT /ligand_part="Fe" FT /ligand_part_id="ChEBI:CHEBI:18248" FT /note="axial binding residue" FT /evidence="ECO:0000256|PIRSR:PIRSR038885-2" FT BINDING 97 FT /ligand="heme b" FT /ligand_id="ChEBI:CHEBI:60344" FT /ligand_label="b566" FT /ligand_part="Fe" FT /ligand_part_id="ChEBI:CHEBI:18248" FT /note="axial binding residue" FT /evidence="ECO:0000256|PIRSR:PIRSR038885-2" FT BINDING 182 FT /ligand="heme b" FT /ligand_id="ChEBI:CHEBI:60344" FT /ligand_label="b562" FT /ligand_part="Fe" FT /ligand_part_id="ChEBI:CHEBI:18248" FT /note="axial binding residue" FT /evidence="ECO:0000256|PIRSR:PIRSR038885-2" FT BINDING 196 FT /ligand="heme b" FT /ligand_id="ChEBI:CHEBI:60344" FT /ligand_label="b566" FT /ligand_part="Fe" FT /ligand_part_id="ChEBI:CHEBI:18248" FT /note="axial binding residue" FT /evidence="ECO:0000256|PIRSR:PIRSR038885-2" FT BINDING 201 FT /ligand="a ubiquinone" FT /ligand_id="ChEBI:CHEBI:16389" FT /evidence="ECO:0000256|PIRSR:PIRSR038885-1" SQ SEQUENCE 379 AA; 42575 MW; 417510B308CB36C6 CRC64; MTNIRKMHPL AKIINNSLID LPAPSNISAW WNFGSLLAVC LALQILTGLF LAMHYTSDTT TAFSSVTHIC RDVNYGWIIR YMHANGASMF FICLYMHVGR GLYYGSYTLM ETWNIGIILL FTIMATAFMG YVLPWGQMSF WGATVITNLL SAVPYVGTNL VEWIWGGFSV DKATLTRFFA FHFILPFVVS ALVMVHLLFL HETGSNNPSG VSSDSDKIPF HPYYTIKDIL GALLLILILM LLVMFSPDLL GDPDNYIPAN PLSTPPHIKP EWYFLFAYAI LRSIPNKLGG VLALLLSILI LAIIPLLHTS KQRGMMFRPI SQFLFWLLVA DLLTLTWIGG QPVEHPFIAI GQLASILYFT ILLILMPIAG IIENHILKW //