ID   UCRI_SYNR3              Reviewed;         178 AA.
AC   A5GRU8;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   12-JUN-2007, sequence version 1.
DT   16-JUN-2009, entry version 23.
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=SynRCC307_0704;
OS   Synechococcus sp. (strain RCC307).
OC   Bacteria; Cyanobacteria; Chroococcales; Synechococcus.
OX   NCBI_TaxID=316278;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RG   Genoscope;
RL   Submitted (MAY-2006) 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.
CC   -----------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see http://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution-NoDerivs License
CC   -----------------------------------------------------------------------
DR   EMBL; CT978603; CAK27607.1; -; Genomic_DNA.
DR   RefSeq; YP_001226960.1; -.
DR   GeneID; 5157624; -.
DR   GenomeReviews; CT978603_GR; SynRCC307_0704.
DR   KEGG; syr:SynRCC307_0704; -.
DR   OMA; A5GRU8; YPVANYF.
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:UniProtKB-KW.
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: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_cplx_Fe-S_su.
DR   InterPro; IPR017941; Rieske_2Fe-2S.
DR   InterPro; IPR014349; Rieske_Fe-S_prot.
DR   InterPro; IPR006311; Tat.
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   TIGRFAMs; TIGR01409; TAT_signal_seq; 1.
DR   PROSITE; PS51296; RIESKE; 1.
PE   3: Inferred from homology;
KW   2Fe-2S; Complete proteome; Disulfide bond; Electron transport; Iron;
KW   Iron-sulfur; Membrane; Metal-binding; Oxidoreductase; Thylakoid;
KW   Transmembrane; Transport.
FT   CHAIN         1    178       Cytochrome b6-f complex iron-sulfur
FT                                subunit.
FT                                /FTId=PRO_1000052946.
FT   TRANSMEM     20     42       Potential.
FT   DOMAIN       65    161       Rieske.
FT   METAL       107    107       Iron-sulfur (2Fe-2S) (By similarity).
FT   METAL       109    109       Iron-sulfur (2Fe-2S); via pros nitrogen
FT                                (By similarity).
FT   METAL       125    125       Iron-sulfur (2Fe-2S) (By similarity).
FT   METAL       128    128       Iron-sulfur (2Fe-2S); via pros nitrogen
FT                                (By similarity).
FT   DISULFID    112    127       By similarity.
SQ   SEQUENCE   178 AA;  18929 MW;  E6ADA0BC97F5FE85 CRC64;
     MTQISAKDVP GMGRRQFMNL LTFGSVTGVA LGALYPVVNY FIPPKASGAG GGTTAKDELG
     NDVTASGWLA DHKEGDRSLV QGLKGDPTYL IVDGPDSIGD YGINAICTHL GCVVPWNAGA
     NKFMCPCHGS QYDATGKVVR GPAPLSLALA HVNVENDNVF VSQWSETDFR TDEKPWWA
//