ID A0A2R8ASV9_9RHOB Unreviewed; 437 AA.
AC A0A2R8ASV9;
DT 20-JUN-2018, integrated into UniProtKB/TrEMBL.
DT 20-JUN-2018, sequence version 1.
DT 27-MAR-2024, entry version 21.
DE RecName: Full=Cytochrome b {ECO:0000256|ARBA:ARBA00013531, ECO:0000256|RuleBase:RU003385};
GN Name=petB {ECO:0000313|EMBL:SPF79132.1};
GN ORFNames=ALP8811_03068 {ECO:0000313|EMBL:SPF79132.1};
OS Aliiroseovarius pelagivivens.
OC Bacteria; Pseudomonadota; Alphaproteobacteria; Rhodobacterales;
OC Paracoccaceae; Aliiroseovarius.
OX NCBI_TaxID=1639690 {ECO:0000313|EMBL:SPF79132.1, ECO:0000313|Proteomes:UP000244911};
RN [1] {ECO:0000313|EMBL:SPF79132.1, ECO:0000313|Proteomes:UP000244911}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=CECT 8811 {ECO:0000313|EMBL:SPF79132.1,
RC ECO:0000313|Proteomes:UP000244911};
RA Keele B.F.;
RL Submitted (MAR-2018) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Component of the ubiquinol-cytochrome c reductase complex
CC (complex III or cytochrome b-c1 complex), which is a respiratory chain
CC that generates an electrochemical potential coupled to ATP synthesis.
CC {ECO:0000256|ARBA:ARBA00002444, ECO:0000256|RuleBase:RU003385}.
CC -!- COFACTOR:
CC Name=heme b; Xref=ChEBI:CHEBI:60344;
CC Evidence={ECO:0000256|RuleBase:RU003385};
CC Note=Binds 2 heme groups non-covalently.
CC {ECO:0000256|RuleBase:RU003385};
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 main subunits of complex b-c1 are: cytochrome b,
CC cytochrome c1 and the Rieske protein. {ECO:0000256|ARBA:ARBA00011649,
CC ECO:0000256|RuleBase:RU003385}.
CC -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000256|ARBA:ARBA00004651};
CC Multi-pass membrane protein {ECO:0000256|ARBA:ARBA00004651}. Membrane
CC {ECO:0000256|ARBA:ARBA00004141}; Multi-pass membrane protein
CC {ECO:0000256|ARBA:ARBA00004141}.
CC -!- SIMILARITY: Belongs to the cytochrome b family.
CC {ECO:0000256|RuleBase:RU003385}.
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DR EMBL; OMOI01000002; SPF79132.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A2R8ASV9; -.
DR OrthoDB; 9804503at2; -.
DR Proteomes; UP000244911; Unassembled WGS sequence.
DR GO; GO:0005886; C:plasma 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; cd00284; Cytochrome_b_N; 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; IPR048259; Cytochrome_b_N_euk/bac.
DR InterPro; IPR016174; Di-haem_cyt_TM.
DR PANTHER; PTHR19271; CYTOCHROME B; 1.
DR PANTHER; PTHR19271:SF16; CYTOCHROME B; 1.
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:RU003385};
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|SAM:Phobius};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723,
KW ECO:0000256|PIRSR:PIRSR038885-2};
KW Reference proteome {ECO:0000313|Proteomes:UP000244911};
KW Respiratory chain {ECO:0000256|ARBA:ARBA00022660,
KW ECO:0000256|RuleBase:RU003385};
KW Transmembrane {ECO:0000256|ARBA:ARBA00022692,
KW ECO:0000256|RuleBase:RU003385};
KW Transmembrane helix {ECO:0000256|ARBA:ARBA00022989,
KW ECO:0000256|SAM:Phobius};
KW Transport {ECO:0000256|ARBA:ARBA00022448, ECO:0000256|RuleBase:RU003385}.
FT TRANSMEM 44..67
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 101..121
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 127..149
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 156..173
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 193..216
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 253..276
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 296..318
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 330..349
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 365..382
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 394..414
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT DOMAIN 15..225
FT /note="Cytochrome b/b6 N-terminal region profile"
FT /evidence="ECO:0000259|PROSITE:PS51002"
FT DOMAIN 234..422
FT /note="Cytochrome b/b6 C-terminal region profile"
FT /evidence="ECO:0000259|PROSITE:PS51003"
FT BINDING 97
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 111
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 198
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 212
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 217
FT /ligand="a ubiquinone"
FT /ligand_id="ChEBI:CHEBI:16389"
FT /evidence="ECO:0000256|PIRSR:PIRSR038885-1"
SQ SEQUENCE 437 AA; 49574 MW; C3FEC2273B8CFC90 CRC64;
MSGIPHDHYE PKSGFEKWLD ERLPIVGLAY GTLMIPTPKN LNWWWIWGIV LAFCLVMQIV
TGIILVMHYT PHVDLAFASI EHIMRDVNGG HMIRYIHMNG ASLFFLAVYI HIFRGLFYGS
YKAPREITWI VGMIIYLLMM ATGFMGYVLP WGQMSFWGAT VITGLFGAIP FIGEPLQTFL
LGGPAVDNAT LNRFFSLHYL LPFVIAALVA VHIWAFHTTG NNNPTGVEVR RGSKEEVKKD
TLPFWPYFVI KDLFALGLIL VGFFAIVGFM PNYLGHPDNY IEANALATPA HIVPEWYFLP
FYAILRAFTA DVWVVQFVSF ITGGIIDAKF FGVLAMFGAI IVMALAPWLD TSSVRSGQYR
PAFKWWYRLL LIDFVVLMWV GARDTNFPHD WISLIGSTYW FAYFLVILPL LGLFEKPTTP
PATIEEDFNA HYPGAAE
//
