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UCRIB_NOSS1
ID   UCRIB_NOSS1             Reviewed;         178 AA.
AC   Q93SW8;
DT   05-JUL-2005, integrated into UniProtKB/Swiss-Prot.
DT   01-DEC-2001, sequence version 1.
DT   03-AUG-2022, entry version 124.
DE   RecName: Full=Cytochrome b6-f complex iron-sulfur subunit 2 {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 2 {ECO:0000255|HAMAP-Rule:MF_01335};
DE            Short=ISP 2 {ECO:0000255|HAMAP-Rule:MF_01335};
DE            Short=RISP 2 {ECO:0000255|HAMAP-Rule:MF_01335};
DE   AltName: Full=Rieske iron-sulfur protein 2 {ECO:0000255|HAMAP-Rule:MF_01335};
GN   Name=petC2 {ECO:0000255|HAMAP-Rule:MF_01335}; OrderedLocusNames=all4511;
OS   Nostoc sp. (strain PCC 7120 / SAG 25.82 / UTEX 2576).
OC   Bacteria; Cyanobacteria; Nostocales; Nostocaceae; Nostoc.
OX   NCBI_TaxID=103690;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA   Arnold M.;
RT   "b6f complex of Anabaena sp; possible function of alternative Rieske-FeS
RT   proteins.";
RL   Submitted (MAY-2001) to the EMBL/GenBank/DDBJ databases.
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 7120 / SAG 25.82 / UTEX 2576;
RX   PubMed=11759840; DOI=10.1093/dnares/8.5.205;
RA   Kaneko T., Nakamura Y., Wolk C.P., Kuritz T., Sasamoto S., Watanabe A.,
RA   Iriguchi M., Ishikawa A., Kawashima K., Kimura T., Kishida Y., Kohara M.,
RA   Matsumoto M., Matsuno A., Muraki A., Nakazaki N., Shimpo S., Sugimoto M.,
RA   Takazawa M., Yamada M., Yasuda M., Tabata S.;
RT   "Complete genomic sequence of the filamentous nitrogen-fixing
RT   cyanobacterium Anabaena sp. strain PCC 7120.";
RL   DNA Res. 8:205-213(2001).
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; AJ319647; CAC39606.1; -; Genomic_DNA.
DR   EMBL; BA000019; BAB76210.1; -; Genomic_DNA.
DR   PIR; AG2369; AG2369.
DR   RefSeq; WP_010998644.1; NZ_RSCN01000007.1.
DR   AlphaFoldDB; Q93SW8; -.
DR   SMR; Q93SW8; -.
DR   STRING; 103690.17133647; -.
DR   TCDB; 3.D.3.5.6; the proton-translocating quinol:cytochrome c reductase (qcr) superfamily.
DR   EnsemblBacteria; BAB76210; BAB76210; BAB76210.
DR   KEGG; ana:all4511; -.
DR   eggNOG; COG0723; Bacteria.
DR   OMA; WGIVDNC; -.
DR   OrthoDB; 1632945at2; -.
DR   Proteomes; UP000002483; 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; Reference proteome; Thylakoid; Translocase; Transmembrane;
KW   Transmembrane helix; Transport.
FT   CHAIN           1..178
FT                   /note="Cytochrome b6-f complex iron-sulfur subunit 2"
FT                   /id="PRO_0000127768"
FT   TRANSMEM        17..36
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01335"
FT   DOMAIN          61..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;  19443 MW;  1BF282ACDF7BDCD3 CRC64;
     MDDTLNQANP SMSRRQLLNF FTGAIVATTA SAAIYPATKF FMPPAESTDA EGGILAQDKI
     GHPIPASQIL AQASGTRALI AGLAGEPTYL TVREDGTLDP MGIVNNCTHL GCTFPWNPVD
     QQFQCPCHGS RYDAQGSVER GPANRPLKLV QVQVKDDYIW ISPWQETDPR TGEKPWWV
 
 
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