ID   UCRI_SYNP2              Reviewed;         180 AA.
AC   P26292; B1XQK1;
DT   01-MAY-1992, integrated into UniProtKB/Swiss-Prot.
DT   01-MAY-1992, sequence version 1.
DT   25-NOV-2008, entry version 57.
DE   RecName: Full=Cytochrome b6-f complex iron-sulfur subunit;
DE            EC=1.10.99.1;
DE   AltName: Full=Rieske iron-sulfur protein;
DE   AltName: Full=Plastohydroquinone:plastocyanin oxidoreductase iron-sulfur protein;
DE            Short=ISP;
DE            Short=RISP;
GN   Name=petC; OrderedLocusNames=SYNPCC7002_A1909;
OS   Synechococcus sp. (strain ATCC 27264 / PCC 7002 / PR-6) (Agmenellum
OS   quadruplicatum).
OC   Bacteria; Cyanobacteria; Chroococcales; Synechococcus.
OX   NCBI_TaxID=32049;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   MEDLINE=93043038; PubMed=1421151; DOI=10.1007/BF00040607;
RA   Brand S.N., Tan X., Widger W.R.;
RT   "Cloning and sequencing of the petBD operon from the cyanobacterium
RT   Synechococcus sp. PCC 7002.";
RL   Plant Mol. Biol. 20:481-491(1992).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RA   Li T., Zhao J., Zhao C., Liu Z., Zhao F., Marquardt J., Nomura C.T.,
RA   Persson S., Detter J.C., Richardson P.M., Lanz C., Schuster S.C.,
RA   Wang J., Li S., Huang X., Cai T., Yu Z., Luo J., Zhao J., Bryant D.A.;
RT   "Complete sequence of Synechococcus sp. PCC 7002.";
RL   Submitted (FEB-2008) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Component of the cytochrome b6-f complex, which mediates
CC       electron transfer between photosystem II (PSII) and photosystem I
CC       (PSI), cyclic electron flow around PSI, and state transitions (By
CC       similarity).
CC   -!- CATALYTIC ACTIVITY: Plastoquinol-1 + 2 oxidized plastocyanin =
CC       plastoquinone + 2 reduced plastocyanin.
CC   -!- COFACTOR: Binds 1 2Fe-2S cluster per subunit (By similarity).
CC   -!- SUBUNIT: The 4 large subunits of the cytochrome b6-f complex are
CC       cytochrome b6, subunit IV (17 kDa polypeptide, petD), cytochrome f
CC       and the Rieske protein, while the 4 small subunits are petG, petL,
CC       petM and petN. The complex functions as a dimer (By similarity).
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane; Single-pass
CC       membrane protein (By similarity). Note=The transmembrane helix
CC       obliquely spans the membrane in one monomer, and its extrinsic C-
CC       terminal domain is part of the other monomer (By similarity).
CC   -!- MISCELLANEOUS: The Rieske iron-sulfur protein is a high potential
CC       2Fe-2S protein.
CC   -!- SIMILARITY: Contains 1 Rieske domain.
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DR   EMBL; M74514; AAA22069.1; -; Genomic_DNA.
DR   EMBL; CP000951; ACA99896.1; -; Genomic_DNA.
DR   RefSeq; YP_001735152.1; -.
DR   HSSP; P08980; 1RFS.
DR   GeneID; 6057819; -.
DR   GenomeReviews; CP000951_GR; SYNPCC7002_A1909.
DR   KEGG; syp:SYNPCC7002_A1909; -.
DR   GO; GO:0016021; C:integral to membrane; IEA:UniProtKB-KW.
DR   GO; GO:0042651; C:thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0051537; F:2 iron, 2 sulfur cluster binding; IEA:InterPro.
DR   GO; GO:0045158; F:electron transporter, transferring electron...; IEA:HAMAP.
DR   GO; GO:0005506; F:iron ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0009496; F:plastoquinol-plastocyanin reductase activity; IEA:HAMAP.
DR   GO; GO:0008121; F:ubiquinol-cytochrome-c reductase activity; IEA:InterPro.
DR   GO; GO:0022900; P:electron transport chain; IEA:UniProtKB-KW.
DR   GO; GO:0015979; P:photosynthesis; IEA:HAMAP.
DR   GO; GO:0006810; P:transport; IEA:UniProtKB-KW.
DR   HAMAP; MF_01335; -; 1.
DR   InterPro; IPR014909; Cyt_b6-F_Fe-S_su.
DR   InterPro; IPR014349; Rieske.
DR   InterPro; IPR005805; Rieske_C.
DR   InterPro; IPR005806; Rieske_reg.
DR   Gene3D; G3DSA:2.102.10.10; Rieske_reg; 1.
DR   PANTHER; PTHR10134; Rieske; 1.
DR   Pfam; PF08802; CytB6-F_Fe-S; 1.
DR   Pfam; PF00355; Rieske; 1.
DR   PRINTS; PR00162; RIESKE.
DR   PROSITE; PS51296; RIESKE; 1.
PE   3: Inferred from homology;
KW   2Fe-2S; Complete proteome; Electron transport; Iron; Iron-sulfur;
KW   Membrane; Metal-binding; Oxidoreductase; Thylakoid; Transmembrane;
KW   Transport.
FT   CHAIN         1    180       Cytochrome b6-f complex iron-sulfur
FT                                subunit.
FT                                /FTId=PRO_0000127781.
FT   TRANSMEM     21     43       Potential.
FT   DOMAIN       70    162       Rieske.
FT   METAL       108    108       Iron-sulfur (2Fe-2S) (By similarity).
FT   METAL       110    110       Iron-sulfur (2Fe-2S); via pros nitrogen
FT                                (By similarity).
FT   METAL       126    126       Iron-sulfur (2Fe-2S) (By similarity).
FT   METAL       129    129       Iron-sulfur (2Fe-2S); via pros nitrogen
FT                                (By similarity).
FT   DISULFID    113    128       By similarity.
SQ   SEQUENCE   180 AA;  19178 MW;  7A8185C310B47917 CRC64;
     MTQLSGSSDV PDLGRRQFLN LLWVGTAAGT ALGGLYPVIK YFIPPSSGGA GGGVIAKDAL
     GNDIIVSDYL QTHTAGDRSL AQGLKGDPTY VVVEGDNTIS SYGINAICTH LGCVVPWNTA
     ENKFMCPCHG SQYDETGKVV RGPAPLSLAL VHAEVTEDDK ISFTDWTETD FRTDEAPWWA
//