ID Q1YQH5_9GAMM Unreviewed; 678 AA.
AC Q1YQH5;
DT 02-MAY-2006, integrated into UniProtKB/TrEMBL.
DT 02-MAY-2006, sequence version 1.
DT 27-MAR-2024, entry version 86.
DE RecName: Full=Cytochrome b {ECO:0000256|RuleBase:RU003385};
GN ORFNames=GB2207_07028 {ECO:0000313|EMBL:EAS46586.1};
OS gamma proteobacterium HTCC2207.
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Cellvibrionales;
OC Porticoccaceae; SAR92 clade.
OX NCBI_TaxID=314287 {ECO:0000313|EMBL:EAS46586.1, ECO:0000313|Proteomes:UP000005555};
RN [1] {ECO:0000313|EMBL:EAS46586.1, ECO:0000313|Proteomes:UP000005555}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=HTCC2207 {ECO:0000313|EMBL:EAS46586.1,
RC ECO:0000313|Proteomes:UP000005555};
RA Giovannoni S.J., Cho J.-C., Ferriera S., Johnson J., Kravitz S.,
RA Halpern A., Remington K., Beeson K., Tran B., Rogers Y.-H., Friedman R.,
RA Venter J.C.;
RL Submitted (MAR-2006) 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|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 c; Xref=ChEBI:CHEBI:61717;
CC Evidence={ECO:0000256|PIRSR:PIRSR602326-1};
CC Note=Binds 1 heme c group covalently per subunit.
CC {ECO:0000256|PIRSR:PIRSR602326-1};
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}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:EAS46586.1}.
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DR EMBL; AAPI01000006; EAS46586.1; -; Genomic_DNA.
DR AlphaFoldDB; Q1YQH5; -.
DR STRING; 314287.GB2207_07028; -.
DR eggNOG; COG1290; Bacteria.
DR eggNOG; COG2857; Bacteria.
DR HOGENOM; CLU_021957_0_0_6; -.
DR OrthoDB; 9804503at2; -.
DR Proteomes; UP000005555; Unassembled WGS sequence.
DR GO; GO:0070469; C:respirasome; IEA:UniProtKB-KW.
DR GO; GO:0009055; F:electron transfer activity; IEA:InterPro.
DR GO; GO:0020037; F:heme binding; IEA:InterPro.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0022904; P:respiratory electron transport chain; IEA:InterPro.
DR CDD; cd00284; Cytochrome_b_N; 1.
DR Gene3D; 1.10.760.10; Cytochrome c-like domain; 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; IPR036909; Cyt_c-like_dom_sf.
DR InterPro; IPR002326; Cyt_c1.
DR InterPro; IPR027387; Cytb/b6-like_sf.
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; PF02167; Cytochrom_C1; 1.
DR Pfam; PF00033; Cytochrome_B; 1.
DR PRINTS; PR00603; CYTOCHROMEC1.
DR SUPFAM; SSF81648; a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase); 1.
DR SUPFAM; SSF46626; Cytochrome c; 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:PIRSR602326-1};
KW Iron {ECO:0000256|ARBA:ARBA00023004, ECO:0000256|PIRSR:PIRSR602326-1};
KW Membrane {ECO:0000256|ARBA:ARBA00023136, ECO:0000256|SAM:Phobius};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723,
KW ECO:0000256|PIRSR:PIRSR602326-1};
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 37..61
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 86..109
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 121..143
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 149..167
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 188..210
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 240..265
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 311..330
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 342..361
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 373..392
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 412..431
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 651..669
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT DOMAIN 7..220
FT /note="Cytochrome b/b6 N-terminal region profile"
FT /evidence="ECO:0000259|PROSITE:PS51002"
FT DOMAIN 230..403
FT /note="Cytochrome b/b6 C-terminal region profile"
FT /evidence="ECO:0000259|PROSITE:PS51003"
FT BINDING 471
FT /ligand="heme c"
FT /ligand_id="ChEBI:CHEBI:61717"
FT /note="covalent"
FT /evidence="ECO:0000256|PIRSR:PIRSR602326-1"
FT BINDING 474
FT /ligand="heme c"
FT /ligand_id="ChEBI:CHEBI:61717"
FT /note="covalent"
FT /evidence="ECO:0000256|PIRSR:PIRSR602326-1"
FT BINDING 475
FT /ligand="heme c"
FT /ligand_id="ChEBI:CHEBI:61717"
FT /note="covalent"
FT /evidence="ECO:0000256|PIRSR:PIRSR602326-1"
SQ SEQUENCE 678 AA; 76501 MW; 7986B29005B030AB CRC64;
MSKGTSFAEW LDSRMPTLKR EWNRHMAEYY APKNFNFWYY FGVLSMVVLV IQLVTGIWLL
MSYQGSAEQA FASVEYIMRD VDMGWIIRYA HSTGASAFFV VVYMHMYRGL IYGSYKAPRE
LVWIFGMTIY VALMAEAFLG YVLPWGQMSY WGAQVIISLF GAIPVVGEDV VQWIRGDYLI
SGITLNRFMS LHVVAMPIIL IALVVMHIIA LHDVGSNNPD GVSIKKYKDE KGNPIDGIPF
YPYFVIHDLV PIVVFLFVFC AILFFMPEMG GYFLEYANFE IANSLKTPEH IAPVWYFTPY
YSMLRAVPDK LGGFITMAAA IAILFVLPWL DRSPVRSMRY KGNFSRGAIL VFAASFILLG
YLGVKAPTEA RTLLAQICTV LYFSYFIGIY FWTRIETTRP EPDRITMDGG IGIWKTLGGV
LIVALLVVLP IKAVGAESGK SCGTIDCDAF EADLRDHASM QNGAQLAVNY CMGCHSFKYS
RWERVANDIG IPNQLMLDNM VFSGQKIGEL MKIAMTEDGA KEWFGAVPPD LTLVARSRSP
EWLYTYLRNF YADPSRPLGV NNKVFKDVGM PHVLLDLQGL PECAPGPVVT ANGGIKRDLL
TGEDILDDPC GRFDINTAGS MTAEEFDVAM YDLVNFMTYI AEPMAEERKH IGRLVLLFLL
LLLVFVMLLN REYWKGIH
//
