ID   UCRI_BLAVI              Reviewed;         179 AA.
AC   P81380;
DT   15-JUL-1999, integrated into UniProtKB/Swiss-Prot.
DT   15-JUL-1999, sequence version 2.
DT   02-SEP-2026, entry version 111.
DE   RecName: Full=Ubiquinol-cytochrome c reductase iron-sulfur subunit;
DE            EC=7.1.1.8;
DE   AltName: Full=Rieske iron-sulfur protein;
DE            Short=RISP;
GN   Name=petA; Synonyms=fbcF;
OS   Blastochloris viridis (Rhodopseudomonas viridis).
OC   Bacteria; Pseudomonadati; Pseudomonadota; Alphaproteobacteria;
OC   Hyphomicrobiales; Blastochloridaceae; Blastochloris.
OX   NCBI_TaxID=1079;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=ATCC 19567 / DSM 133 / F;
RX   PubMed=2560136; DOI=10.1007/bf00259618;
RA   Verbist J., Lang F., Gabellini N., Oesterhelt D.;
RT   "Cloning and sequencing of the fbcF, B and C genes encoding the cytochrome
RT   b/c1 complex from Rhodopseudomonas viridis.";
RL   Mol. Gen. Genet. 219:445-452(1989).
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   -!- CATALYTIC ACTIVITY:
CC       Reaction=a quinol + 2 Fe(III)-[cytochrome c](out) = a quinone + 2
CC         Fe(II)-[cytochrome c](out) + 2 H(+)(out); Xref=Rhea:RHEA:11484,
CC         Rhea:RHEA-COMP:10350, Rhea:RHEA-COMP:14399, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:24646, ChEBI:CHEBI:29033, ChEBI:CHEBI:29034,
CC         ChEBI:CHEBI:132124; EC=7.1.1.8;
CC   -!- COFACTOR:
CC       Name=[2Fe-2S] cluster; Xref=ChEBI:CHEBI:190135;
CC         Evidence={ECO:0000255|PROSITE-ProRule:PRU00628};
CC       Note=Binds 1 [2Fe-2S] cluster per subunit. {ECO:0000255|PROSITE-
CC       ProRule:PRU00628};
CC   -!- SUBUNIT: The main subunits of complex b-c1 are: cytochrome b,
CC       cytochrome c1 and the Rieske protein.
CC   -!- SUBCELLULAR LOCATION: Cell membrane; Single-pass membrane protein.
CC   -!- MISCELLANEOUS: The Rieske protein is a high potential 2Fe-2S protein.
CC   -!- SIMILARITY: Belongs to the Rieske iron-sulfur protein family.
CC       {ECO:0000305}.
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DR   PIR; JQ0345; JQ0345.
DR   RefSeq; WP_236823603.1; NZ_AP014854.2.
DR   AlphaFoldDB; P81380; -.
DR   SMR; P81380; -.
DR   STRING; 1079.BVIR_2485; -.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0051537; F:2 iron, 2 sulfur cluster binding; IEA:InterPro.
DR   GO; GO:0008121; F:quinol-cytochrome-c reductase activity; IEA:UniProtKB-EC.
DR   CDD; cd03470; Rieske_cytochrome_bc1; 1.
DR   FunFam; 2.102.10.10:FF:000001; Cytochrome b-c1 complex subunit Rieske, mitochondrial; 1.
DR   Gene3D; 2.102.10.10; Rieske [2Fe-2S] iron-sulphur domain; 1.
DR   Gene3D; 1.20.5.510; Single helix bin; 1.
DR   InterPro; IPR017941; Rieske_2Fe-2S.
DR   InterPro; IPR036922; Rieske_2Fe-2S_sf.
DR   InterPro; IPR014349; Rieske_Fe-S_prot.
DR   InterPro; IPR005805; Rieske_Fe-S_prot_C.
DR   InterPro; IPR006311; TAT_signal.
DR   InterPro; IPR019546; TAT_signal_bac_arc.
DR   InterPro; IPR019470; Ubiq_cytC_Rdtase_Fe-S_su_TAT.
DR   InterPro; IPR006317; Ubiquinol_cyt_c_Rdtase_Fe-S-su.
DR   NCBIfam; TIGR01416; Rieske_proteo; 1.
DR   NCBIfam; TIGR01409; TAT_signal_seq; 1.
DR   PANTHER; PTHR10134; CYTOCHROME B-C1 COMPLEX SUBUNIT RIESKE, MITOCHONDRIAL; 1.
DR   Pfam; PF00355; Rieske; 1.
DR   Pfam; PF10399; UCR_Fe-S_N; 1.
DR   PRINTS; PR00162; RIESKE.
DR   SUPFAM; SSF50022; ISP domain; 1.
DR   PROSITE; PS51296; RIESKE; 1.
DR   PROSITE; PS51318; TAT; 1.
PE   3: Inferred from homology;
KW   2Fe-2S; Cell membrane; Disulfide bond; Electron transport; Iron;
KW   Iron-sulfur; Membrane; Metal-binding; Translocase; Transmembrane;
KW   Transmembrane helix; Transport.
FT   CHAIN           1..179
FT                   /note="Ubiquinol-cytochrome c reductase iron-sulfur
FT                   subunit"
FT                   /id="PRO_0000127765"
FT   TRANSMEM        14..35
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   DOMAIN          80..173
FT                   /note="Rieske"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00628"
FT   BINDING         118
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00628"
FT   BINDING         120
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00628"
FT   BINDING         137
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00628"
FT   BINDING         140
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00628"
FT   DISULFID        123..139
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00628"
SQ   SEQUENCE   179 AA;  19011 MW;  FEE328E1637DC49C CRC64;
     MASSDTAEAT RRDFLYVATA AVGAAGVAAV AWPFITQMNP DAATIAAGAP IDIDISPVTE
     GQIVRVFWRG KPIFIRHRTA KEIQSEEAAD VGALIDPQPD SARVKPGKAE WLVVYASCTH
     LGCIPLGHQG DWGGWFCPCH GSQYDASGRV RKGPAPTNLP VPPYEFVDNT KIRIGAGVA
//