ID PSBF_SYNE7 Reviewed; 44 AA.
AC Q8KPP2; Q31P13;
DT 30-MAY-2003, integrated into UniProtKB/Swiss-Prot.
DT 01-OCT-2002, sequence version 1.
DT 27-MAR-2024, entry version 117.
DE RecName: Full=Cytochrome b559 subunit beta {ECO:0000255|HAMAP-Rule:MF_00643};
DE AltName: Full=PSII reaction center subunit VI {ECO:0000255|HAMAP-Rule:MF_00643};
GN Name=psbF {ECO:0000255|HAMAP-Rule:MF_00643};
GN OrderedLocusNames=Synpcc7942_1176; ORFNames=see0053;
OS Synechococcus elongatus (strain ATCC 33912 / PCC 7942 / FACHB-805)
OS (Anacystis nidulans R2).
OC Bacteria; Cyanobacteriota; Cyanophyceae; Synechococcales; Synechococcaceae;
OC Synechococcus.
OX NCBI_TaxID=1140;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA Holtman C.K., Sandoval P., Chen Y., Socias T., Mohler B.J., McMurtry S.,
RA Gonzalez A., Salinas I., Golden S.S., Youderian P.;
RT "Synechococcus elongatus PCC7942 cosmid 7G3.";
RL Submitted (JUN-2002) to the EMBL/GenBank/DDBJ databases.
RN [2]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 33912 / PCC 7942 / FACHB-805;
RG US DOE Joint Genome Institute;
RA Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina T.,
RA Hammon N., Israni S., Pitluck S., Schmutz J., Larimer F., Land M.,
RA Kyrpides N., Lykidis A., Golden S., Richardson P.;
RT "Complete sequence of chromosome 1 of Synechococcus elongatus PCC 7942.";
RL Submitted (AUG-2005) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: This b-type cytochrome is tightly associated with the
CC reaction center of photosystem II (PSII). PSII is a light-driven
CC water:plastoquinone oxidoreductase that uses light energy to abstract
CC electrons from H(2)O, generating O(2) and a proton gradient
CC subsequently used for ATP formation. It consists of a core antenna
CC complex that captures photons, and an electron transfer chain that
CC converts photonic excitation into a charge separation.
CC {ECO:0000255|HAMAP-Rule:MF_00643}.
CC -!- COFACTOR:
CC Name=heme b; Xref=ChEBI:CHEBI:60344;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00643};
CC Note=With its partner (PsbE) binds heme. PSII binds additional
CC chlorophylls, carotenoids and specific lipids. {ECO:0000255|HAMAP-
CC Rule:MF_00643};
CC -!- SUBUNIT: Heterodimer of an alpha subunit and a beta subunit. PSII is
CC composed of 1 copy each of membrane proteins PsbA, PsbB, PsbC, PsbD,
CC PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK, PsbL, PsbM, PsbT, PsbX, PsbY, PsbZ,
CC Psb30/Ycf12, peripheral proteins PsbO, CyanoQ (PsbQ), PsbU, PsbV and a
CC large number of cofactors. It forms dimeric complexes.
CC {ECO:0000255|HAMAP-Rule:MF_00643}.
CC -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC Rule:MF_00643}; Single-pass membrane protein {ECO:0000255|HAMAP-
CC Rule:MF_00643}.
CC -!- SIMILARITY: Belongs to the PsbE/PsbF family. {ECO:0000255|HAMAP-
CC Rule:MF_00643}.
CC ---------------------------------------------------------------------------
CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC ---------------------------------------------------------------------------
DR EMBL; AY120853; AAM82728.1; -; Genomic_DNA.
DR EMBL; CP000100; ABB57206.1; -; Genomic_DNA.
DR RefSeq; WP_011242686.1; NZ_JACJTX010000003.1.
DR AlphaFoldDB; Q8KPP2; -.
DR SMR; Q8KPP2; -.
DR STRING; 1140.Synpcc7942_1176; -.
DR TCDB; 3.E.2.2.1; the photosynthetic reaction center (prc) family.
DR PaxDb; 1140-Synpcc7942_1176; -.
DR GeneID; 76399916; -.
DR KEGG; syf:Synpcc7942_1176; -.
DR eggNOG; ENOG50332KX; Bacteria.
DR HOGENOM; CLU_211753_1_0_3; -.
DR OrthoDB; 532613at2; -.
DR BioCyc; MetaCyc:SYNPCC7942_1176-MONOMER; -.
DR BioCyc; SYNEL:SYNPCC7942_1176-MONOMER; -.
DR Proteomes; UP000889800; Chromosome.
DR GO; GO:0009539; C:photosystem II reaction center; IEA:InterPro.
DR GO; GO:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0009055; F:electron transfer activity; IEA:UniProtKB-UniRule.
DR GO; GO:0020037; F:heme binding; IEA:InterPro.
DR GO; GO:0005506; F:iron ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0009767; P:photosynthetic electron transport chain; IEA:InterPro.
DR HAMAP; MF_00643; PSII_PsbF; 1.
DR InterPro; IPR006241; PSII_cyt_b559_bsu.
DR InterPro; IPR006216; PSII_cyt_b559_CS.
DR InterPro; IPR013081; PSII_cyt_b559_N.
DR NCBIfam; TIGR01333; cyt_b559_beta; 1.
DR Pfam; PF00283; Cytochrom_B559; 1.
DR PIRSF; PIRSF000037; PsbF; 1.
DR SUPFAM; SSF161045; Cytochrome b559 subunits; 1.
DR PROSITE; PS00537; CYTOCHROME_B559; 1.
PE 3: Inferred from homology;
KW Electron transport; Heme; Iron; Membrane; Metal-binding; Photosynthesis;
KW Photosystem II; Reference proteome; Thylakoid; Transmembrane;
KW Transmembrane helix; Transport.
FT CHAIN 1..44
FT /note="Cytochrome b559 subunit beta"
FT /id="PRO_0000200475"
FT TRANSMEM 19..35
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00643"
FT BINDING 23
FT /ligand="heme"
FT /ligand_id="ChEBI:CHEBI:30413"
FT /ligand_note="ligand shared with alpha subunit"
FT /ligand_part="Fe"
FT /ligand_part_id="ChEBI:CHEBI:18248"
FT /note="axial binding residue"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00643"
SQ SEQUENCE 44 AA; 4925 MW; BD6D0D41B2A186D5 CRC64;
MTSNNSNQPI TYPIFTVRWL SVHALGVPSV FFLGAIAAMQ FIQR
//
