ID A0A0X8XAN1_HALHR Unreviewed; 414 AA.
AC A0A0X8XAN1;
DT 13-APR-2016, integrated into UniProtKB/TrEMBL.
DT 13-APR-2016, sequence version 1.
DT 27-MAR-2024, entry version 35.
DE RecName: Full=Cytochrome b {ECO:0000256|ARBA:ARBA00013531, ECO:0000256|RuleBase:RU003385};
GN ORFNames=HH1059_18400 {ECO:0000313|EMBL:BAU58529.1};
OS Halorhodospira halochloris (Ectothiorhodospira halochloris).
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Chromatiales;
OC Ectothiorhodospiraceae; Halorhodospira.
OX NCBI_TaxID=1052 {ECO:0000313|EMBL:BAU58529.1, ECO:0000313|Proteomes:UP000218890};
RN [1] {ECO:0000313|Proteomes:UP000218890}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM-1059 {ECO:0000313|Proteomes:UP000218890};
RA Tsukatani Y.;
RT "Halorhodospira halochloris DSM-1059 complete genome sequence.";
RL Submitted (FEB-2016) 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: Membrane {ECO:0000256|ARBA:ARBA00004141}; Multi-
CC pass membrane protein {ECO:0000256|ARBA:ARBA00004141}.
CC -!- SIMILARITY: Belongs to the cytochrome b family.
CC {ECO:0000256|RuleBase:RU003385}.
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DR EMBL; AP017372; BAU58529.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A0X8XAN1; -.
DR KEGG; hhk:HH1059_18400; -.
DR OrthoDB; 9804503at2; -.
DR Proteomes; UP000218890; Chromosome.
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:UP000218890};
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 41..68
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 89..110
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 125..145
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 152..171
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 191..213
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 254..278
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 298..331
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 351..368
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 380..401
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT DOMAIN 12..224
FT /note="Cytochrome b/b6 N-terminal region profile"
FT /evidence="ECO:0000259|PROSITE:PS51002"
FT DOMAIN 234..410
FT /note="Cytochrome b/b6 C-terminal region profile"
FT /evidence="ECO:0000259|PROSITE:PS51003"
FT BINDING 95
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 109
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 196
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 211
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 216
FT /ligand="a ubiquinone"
FT /ligand_id="ChEBI:CHEBI:16389"
FT /evidence="ECO:0000256|PIRSR:PIRSR038885-1"
SQ SEQUENCE 414 AA; 47652 MW; 3935EF8BC5F0AC17 CRC64;
MSEQSASRLS ELQAWVDKRF PLTSTWRYHM TEYYVPKNIN FWYLFGSLSI LVLVIQIITG
IWLTMYYQPS VDRAFASVEF IMRDVEWGWL MRYLHTVGAS AFFVVVYLHM FRCLMYGSYK
KPRELLWIIG VLIYLVMMTE AFMGYALPWG QLSYWATQVI VALFGVVPFI GDDLVVWLQG
GFLVNEATLG RLFSLHVIGL PLVLILLVFL HIVALHHVGS SSPDGVEIKE NKDKNGKPVD
GIAFHPYVTV KDMVGMGIFL IIFCAIVFFA PEFFGYFIEA PNLEEANPLQ TPETIHPIWY
FTAWYAMLQC VPNEALGVVV MFAGSMILLF LPWIDRSEVR SIRYRGRGFK IALAVFVASF
LILTWAGMQE PSGLPMLISR IFTVVYFGFF VFLWVYTYFG FEQTKPVPER VTDK
//
