UCRI_PARMW
ID UCRI_PARMW Reviewed; 178 AA.
AC Q7U566;
DT 05-JUL-2005, integrated into UniProtKB/Swiss-Prot.
DT 01-OCT-2003, sequence version 1.
DT 03-AUG-2022, entry version 126.
DE RecName: Full=Cytochrome b6-f complex iron-sulfur subunit {ECO:0000255|HAMAP-Rule:MF_01335};
DE EC=7.1.1.6 {ECO:0000255|HAMAP-Rule:MF_01335};
DE AltName: Full=Plastohydroquinone:plastocyanin oxidoreductase iron-sulfur protein {ECO:0000255|HAMAP-Rule:MF_01335};
DE Short=ISP {ECO:0000255|HAMAP-Rule:MF_01335};
DE Short=RISP {ECO:0000255|HAMAP-Rule:MF_01335};
DE AltName: Full=Rieske iron-sulfur protein {ECO:0000255|HAMAP-Rule:MF_01335};
GN Name=petC {ECO:0000255|HAMAP-Rule:MF_01335}; OrderedLocusNames=SYNW1841;
OS Parasynechococcus marenigrum (strain WH8102).
OC Bacteria; Cyanobacteria; Synechococcales; Prochlorococcaceae;
OC Parasynechococcus; Parasynechococcus marenigrum.
OX NCBI_TaxID=84588;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=WH8102;
RX PubMed=12917641; DOI=10.1038/nature01943;
RA Palenik B., Brahamsha B., Larimer F.W., Land M.L., Hauser L., Chain P.,
RA Lamerdin J.E., Regala W., Allen E.E., McCarren J., Paulsen I.T.,
RA Dufresne A., Partensky F., Webb E.A., Waterbury J.;
RT "The genome of a motile marine Synechococcus.";
RL Nature 424:1037-1042(2003).
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.
CC {ECO:0000255|HAMAP-Rule:MF_01335}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a plastoquinol + 2 H(+)(in) + 2 oxidized [plastocyanin] = a
CC plastoquinone + 4 H(+)(out) + 2 reduced [plastocyanin];
CC Xref=Rhea:RHEA:22148, Rhea:RHEA-COMP:9561, Rhea:RHEA-COMP:9562,
CC Rhea:RHEA-COMP:10039, Rhea:RHEA-COMP:10040, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:17757, ChEBI:CHEBI:29036, ChEBI:CHEBI:49552,
CC ChEBI:CHEBI:62192; EC=7.1.1.6; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_01335};
CC -!- COFACTOR:
CC Name=[2Fe-2S] cluster; Xref=ChEBI:CHEBI:190135;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01335};
CC Note=Binds 1 [2Fe-2S] cluster per subunit. {ECO:0000255|HAMAP-
CC Rule:MF_01335};
CC -!- SUBUNIT: The 4 large subunits of the cytochrome b6-f complex are
CC cytochrome b6, subunit IV (17 kDa polypeptide, PetD), cytochrome f and
CC the Rieske protein, while the 4 small subunits are PetG, PetL, PetM and
CC PetN. The complex functions as a dimer. {ECO:0000255|HAMAP-
CC Rule:MF_01335}.
CC -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC Rule:MF_01335}; Single-pass membrane protein {ECO:0000255|HAMAP-
CC Rule:MF_01335}. Note=The transmembrane helix obliquely spans the
CC membrane in one monomer, and its extrinsic C-terminal domain is part of
CC the other monomer. {ECO:0000255|HAMAP-Rule:MF_01335}.
CC -!- MISCELLANEOUS: The Rieske iron-sulfur protein is a high potential 2Fe-
CC 2S protein.
CC -!- SIMILARITY: Belongs to the Rieske iron-sulfur protein family.
CC {ECO:0000255|HAMAP-Rule:MF_01335}.
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DR EMBL; BX569694; CAE08356.1; -; Genomic_DNA.
DR RefSeq; WP_011128699.1; NC_005070.1.
DR AlphaFoldDB; Q7U566; -.
DR SMR; Q7U566; -.
DR STRING; 84588.SYNW1841; -.
DR EnsemblBacteria; CAE08356; CAE08356; SYNW1841.
DR KEGG; syw:SYNW1841; -.
DR eggNOG; COG0723; Bacteria.
DR HOGENOM; CLU_055690_8_0_3; -.
DR OMA; KGDPTYI; -.
DR OrthoDB; 1632945at2; -.
DR BioCyc; MetaCyc:TX72_RS09270-MON; -.
DR Proteomes; UP000001422; Chromosome.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR GO; GO:0031676; C:plasma membrane-derived 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 electrons within cytochrome b6/f complex of photosystem II activity; IEA:UniProtKB-UniRule.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0009496; F:plastoquinol--plastocyanin reductase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-UniRule.
DR Gene3D; 2.102.10.10; -; 1.
DR HAMAP; MF_01335; Cytb6_f_Rieske; 1.
DR InterPro; IPR023960; Cyt_b6_f_Rieske.
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 PANTHER; PTHR10134; PTHR10134; 1.
DR Pfam; PF00355; Rieske; 1.
DR PRINTS; PR00162; RIESKE.
DR SUPFAM; SSF50022; SSF50022; 1.
DR PROSITE; PS51296; RIESKE; 1.
DR PROSITE; PS51318; TAT; 1.
PE 3: Inferred from homology;
KW 2Fe-2S; Disulfide bond; Electron transport; Iron; Iron-sulfur; Membrane;
KW Metal-binding; Thylakoid; Translocase; Transmembrane; Transmembrane helix;
KW Transport.
FT CHAIN 1..178
FT /note="Cytochrome b6-f complex iron-sulfur subunit"
FT /id="PRO_0000127783"
FT TRANSMEM 20..42
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01335"
FT DOMAIN 65..161
FT /note="Rieske"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01335"
FT BINDING 107
FT /ligand="[2Fe-2S] cluster"
FT /ligand_id="ChEBI:CHEBI:190135"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01335"
FT BINDING 109
FT /ligand="[2Fe-2S] cluster"
FT /ligand_id="ChEBI:CHEBI:190135"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01335"
FT BINDING 125
FT /ligand="[2Fe-2S] cluster"
FT /ligand_id="ChEBI:CHEBI:190135"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01335"
FT BINDING 128
FT /ligand="[2Fe-2S] cluster"
FT /ligand_id="ChEBI:CHEBI:190135"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01335"
FT DISULFID 112..127
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01335"
SQ SEQUENCE 178 AA; 18735 MW; DE3A1443271528A4 CRC64;
MTQLSSSDVP GMGRRQFMNL LTFGSVTGVA LGALYPVVNY FIPPRAAGAG GGTTAKDELG
NAITATGWLS SHPEGDRSLV QGLKGDPTYL IVEGPDAIGS YGINAICTHL GCVVPWNSGA
NKFMCPCHGS QYDATGKVVR GPAPLSLALA NVSVENDNVF VSQWTETDFR TGDKPWWA
