CYB_CANLU
ID CYB_CANLU Reviewed; 379 AA.
AC Q6Y8J2; Q1HK78; Q1HKA4; Q3ZED2;
DT 26-APR-2005, integrated into UniProtKB/Swiss-Prot.
DT 05-JUL-2004, sequence version 1.
DT 03-AUG-2022, entry version 83.
DE RecName: Full=Cytochrome b;
DE AltName: Full=Complex III subunit 3;
DE AltName: Full=Complex III subunit III;
DE AltName: Full=Cytochrome b-c1 complex subunit 3;
DE AltName: Full=Ubiquinol-cytochrome-c reductase complex cytochrome b subunit;
GN Name=MT-CYB; Synonyms=COB, CYTB, MTCYB;
OS Canis lupus (Gray wolf).
OG Mitochondrion.
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC Eutheria; Laurasiatheria; Carnivora; Caniformia; Canidae; Canis.
OX NCBI_TaxID=9612;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=12610623; DOI=10.1038/nature01303;
RA Yoder A.D., Burns M.M., Zehr S., Delefosse T., Veron G., Goodman S.M.,
RA Flynn J.J.;
RT "Single origin of Malagasy Carnivora from an African ancestor.";
RL Nature 421:734-737(2003).
RN [2]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=15964215; DOI=10.1016/j.ympev.2005.04.025;
RA Delisle I., Strobeck C.;
RT "A phylogeny of the Caniformia (order Carnivora) based on 12 complete
RT protein-coding mitochondrial genes.";
RL Mol. Phylogenet. Evol. 37:192-201(2005).
RN [3]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND VARIANTS ALA-67; VAL-136; ASN-147
RP AND MET-164.
RX PubMed=16809672; DOI=10.1101/gr.5117706;
RA Bjornerfeldt S., Webster M.T., Vila C.;
RT "Relaxation of selective constraint on dog mitochondrial DNA following
RT domestication.";
RL Genome Res. 16:990-994(2006).
RN [4]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=16503281; DOI=10.1016/j.ympev.2005.10.017;
RA Koepfli K.-P., Jenks S.M., Eizirik E., Zahirpour T., Van Valkenburgh B.,
RA Wayne R.K.;
RT "Molecular systematics of the Hyaenidae: relationships of a relictual
RT lineage resolved by a molecular supermatrix.";
RL Mol. Phylogenet. Evol. 38:603-620(2006).
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:0000250|UniProtKB:P00157}.
CC -!- COFACTOR:
CC Name=heme b; Xref=ChEBI:CHEBI:60344;
CC Evidence={ECO:0000250|UniProtKB:P00157};
CC Note=Binds 2 heme b groups non-covalently.
CC {ECO:0000250|UniProtKB:P00157};
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:0000250|UniProtKB:P00157}.
CC -!- SUBCELLULAR LOCATION: Mitochondrion inner membrane
CC {ECO:0000250|UniProtKB:P00157}; Multi-pass membrane protein
CC {ECO:0000250|UniProtKB:P00157}.
CC -!- MISCELLANEOUS: Heme 1 (or BL or b562) is low-potential and absorbs at
CC about 562 nm, and heme 2 (or BH or b566) is high-potential and absorbs
CC at about 566 nm. {ECO:0000250}.
CC -!- SIMILARITY: Belongs to the cytochrome b family. {ECO:0000255|PROSITE-
CC ProRule:PRU00967, ECO:0000255|PROSITE-ProRule:PRU00968}.
CC -!- CAUTION: The full-length protein contains only eight transmembrane
CC helices, not nine as predicted by bioinformatics tools.
CC {ECO:0000250|UniProtKB:P00157}.
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DR EMBL; AY170103; AAN85622.1; -; Genomic_DNA.
DR EMBL; AY598499; AAU00445.1; -; Genomic_DNA.
DR EMBL; DQ480503; ABE48167.1; -; Genomic_DNA.
DR EMBL; DQ480504; ABE48180.1; -; Genomic_DNA.
DR EMBL; DQ480505; ABE48193.1; -; Genomic_DNA.
DR EMBL; DQ480506; ABE48206.1; -; Genomic_DNA.
DR EMBL; DQ480507; ABE48219.1; -; Genomic_DNA.
DR EMBL; DQ480508; ABE48232.1; -; Genomic_DNA.
DR EMBL; AY928668; AAY18237.1; -; Genomic_DNA.
DR RefSeq; YP_626740.1; NC_008092.1.
DR AlphaFoldDB; Q6Y8J2; -.
DR SMR; Q6Y8J2; -.
DR GeneID; 4097763; -.
DR CTD; 4519; -.
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-KW.
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; SSF81342; SSF81342; 1.
DR SUPFAM; SSF81648; SSF81648; 1.
DR PROSITE; PS51003; CYTB_CTER; 1.
DR PROSITE; PS51002; CYTB_NTER; 1.
PE 3: Inferred from homology;
KW Electron transport; Heme; Iron; Membrane; Metal-binding; Mitochondrion;
KW Mitochondrion inner membrane; Respiratory chain; Transmembrane;
KW Transmembrane helix; Transport; Ubiquinone.
FT CHAIN 1..379
FT /note="Cytochrome b"
FT /id="PRO_0000060717"
FT TRANSMEM 33..53
FT /note="Helical"
FT /evidence="ECO:0000250|UniProtKB:P00157"
FT TRANSMEM 77..98
FT /note="Helical"
FT /evidence="ECO:0000250|UniProtKB:P00157"
FT TRANSMEM 113..133
FT /note="Helical"
FT /evidence="ECO:0000250|UniProtKB:P00157"
FT TRANSMEM 178..198
FT /note="Helical"
FT /evidence="ECO:0000250|UniProtKB:P00157"
FT TRANSMEM 226..246
FT /note="Helical"
FT /evidence="ECO:0000250|UniProtKB:P00157"
FT TRANSMEM 288..308
FT /note="Helical"
FT /evidence="ECO:0000250|UniProtKB:P00157"
FT TRANSMEM 320..340
FT /note="Helical"
FT /evidence="ECO:0000250|UniProtKB:P00157"
FT TRANSMEM 347..367
FT /note="Helical"
FT /evidence="ECO:0000250|UniProtKB:P00157"
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:0000250|UniProtKB:P00157"
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:0000250|UniProtKB:P00157"
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:0000250|UniProtKB:P00157"
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:0000250|UniProtKB:P00157"
FT BINDING 201
FT /ligand="a ubiquinone"
FT /ligand_id="ChEBI:CHEBI:16389"
FT /evidence="ECO:0000250|UniProtKB:P00157"
FT VARIANT 67
FT /note="T -> A"
FT /evidence="ECO:0000269|PubMed:16809672"
FT VARIANT 136
FT /note="G -> V"
FT /evidence="ECO:0000269|PubMed:16809672"
FT VARIANT 147
FT /note="T -> N"
FT /evidence="ECO:0000269|PubMed:16809672"
FT VARIANT 164
FT /note="I -> M"
FT /evidence="ECO:0000269|PubMed:16809672"
SQ SEQUENCE 379 AA; 42594 MW; 9CCEEB334F0BDF7D CRC64;
MTNIRKTHPL AKIVNNSFID LPAPSNISAW WNFGSLLGVC LILQILTGLF LAMHYTSDTA
TAFSSVTHIC RDVNYGWIIR YMHANGASMF FICLFLHVGR GLYYGSYVFM ETWNIGIVLL
FATMATAFMG YVLPWGQMSF WGATVITNLL SAIPYIGTDL VEWIWGGFSV DKATLTRFFA
FHFILPFIIA ALAMVHLLFL HETGSNNPSG ITSDSDKIPF HPYYTIKDIL GALLLLLILM
SLVLFSPDLL GDPDNYTPAN PLNTPPHIKP EWYFLFAYAI LRSIPNKLGG VLALVFSILI
LAFIPLLHTS KQRSMMFRPL SQCLFWLLVA DLLTLTWIGG QPVEHPFIII GQVASILYFT
ILLILMPTVS VIENNLLKW
