PSBK_SYNY3
ID PSBK_SYNY3 Reviewed; 45 AA.
AC P15819;
DT 01-APR-1990, integrated into UniProtKB/Swiss-Prot.
DT 01-APR-1990, sequence version 1.
DT 03-AUG-2022, entry version 122.
DE RecName: Full=Photosystem II reaction center protein K {ECO:0000255|HAMAP-Rule:MF_00441};
DE Short=PSII-K {ECO:0000255|HAMAP-Rule:MF_00441};
DE Flags: Precursor;
GN Name=psbK {ECO:0000255|HAMAP-Rule:MF_00441}; OrderedLocusNames=sml0005;
OS Synechocystis sp. (strain PCC 6803 / Kazusa).
OC Bacteria; Cyanobacteria; Synechococcales; Merismopediaceae; Synechocystis;
OC unclassified Synechocystis.
OX NCBI_TaxID=1111708;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC STRAIN=ATCC 27184 / PCC 6803 / N-1;
RX PubMed=2108431; DOI=10.1093/nar/18.5.1284;
RA Zhang Z.H., Mayes S.R., Barber J.;
RT "Nucleotide sequence of the psbK gene of the cyanobacterium Synechocystis
RT 6803.";
RL Nucleic Acids Res. 18:1284-1284(1990).
RN [2]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA], PROTEIN SEQUENCE OF 9-23, FUNCTION,
RP SUBUNIT, SUBCELLULAR LOCATION, AND DISRUPTION PHENOTYPE.
RC STRAIN=ATCC 27184 / PCC 6803 / N-1;
RX PubMed=1904061; DOI=10.1016/s0021-9258(18)99134-9;
RA Ikeuchi M., Eggers B., Shen G., Webber A., Yu J., Hirano A., Inoue Y.,
RA Vermaas W.;
RT "Cloning of the psbK gene from Synechocystis sp. PCC 6803 and
RT characterization of photosystem II in mutants lacking PSII-K.";
RL J. Biol. Chem. 266:11111-11115(1991).
RN [3]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=PCC 6803 / Kazusa;
RX PubMed=8905231; DOI=10.1093/dnares/3.3.109;
RA Kaneko T., Sato S., Kotani H., Tanaka A., Asamizu E., Nakamura Y.,
RA Miyajima N., Hirosawa M., Sugiura M., Sasamoto S., Kimura T., Hosouchi T.,
RA Matsuno A., Muraki A., Nakazaki N., Naruo K., Okumura S., Shimpo S.,
RA Takeuchi C., Wada T., Watanabe A., Yamada M., Yasuda M., Tabata S.;
RT "Sequence analysis of the genome of the unicellular cyanobacterium
RT Synechocystis sp. strain PCC6803. II. Sequence determination of the entire
RT genome and assignment of potential protein-coding regions.";
RL DNA Res. 3:109-136(1996).
RN [4]
RP PROTEIN SEQUENCE OF 9-23, SUBUNIT, AND SUBCELLULAR LOCATION.
RC STRAIN=PCC 6803 / Kazusa;
RX PubMed=12069591; DOI=10.1021/bi026012+;
RA Kashino Y., Lauber W.M., Carroll J.A., Wang Q., Whitmarsh J., Satoh K.,
RA Pakrasi H.B.;
RT "Proteomic analysis of a highly active photosystem II preparation from the
RT cyanobacterium Synechocystis sp. PCC 6803 reveals the presence of novel
RT polypeptides.";
RL Biochemistry 41:8004-8012(2002).
RN [5]
RP DISRUPTION PHENOTYPE.
RC STRAIN=ATCC 27184 / PCC 6803 / N-1;
RX PubMed=24317992; DOI=10.1007/bf00046763;
RA Zhang Z.H., Mayes S.R., Vass I., Nagy L., Barber J.;
RT "Characterization of the psbK locus of Synechocystis sp. PCC 6803 in terms
RT of Photosystem II function.";
RL Photosyn. Res. 38:369-377(1993).
CC -!- FUNCTION: One of the components of the core complex of photosystem II
CC (PSII). PSII is a light-driven water:plastoquinone oxidoreductase that
CC uses light energy to abstract electrons from H(2)O, generating O(2) and
CC a proton gradient subsequently used for ATP formation. It consists of a
CC core antenna complex that captures photons, and an electron transfer
CC chain that converts photonic excitation into a charge separation.
CC {ECO:0000255|HAMAP-Rule:MF_00441, ECO:0000269|PubMed:1904061}.
CC -!- SUBUNIT: Cyanobacterial PSII is composed of 1 copy each of membrane
CC proteins PsbA, PsbB, PsbC, PsbD, PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK,
CC PsbL, PsbM, PsbT, PsbX, PsbY, PsbZ, Ycf12, at least 3 peripheral
CC proteins PsbO, PsbU, PsbV and a large number of cofactors. It forms
CC dimeric complexes. {ECO:0000255|HAMAP-Rule:MF_00441,
CC ECO:0000269|PubMed:12069591, ECO:0000269|PubMed:1904061}.
CC -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC Rule:MF_00441, ECO:0000269|PubMed:12069591,
CC ECO:0000269|PubMed:1904061}; Single-pass membrane protein
CC {ECO:0000255|HAMAP-Rule:MF_00441}.
CC -!- DISRUPTION PHENOTYPE: Grows more slowly than wild-type both
CC heteroautotrophically and photoautotrophically, approximately wild-type
CC amounts of PSII assemble. {ECO:0000269|PubMed:1904061,
CC ECO:0000269|PubMed:24317992}.
CC -!- SIMILARITY: Belongs to the PsbK family. {ECO:0000255|HAMAP-
CC Rule:MF_00441}.
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DR EMBL; M74841; AAA27298.1; -; Genomic_DNA.
DR EMBL; X51588; CAA35938.1; -; Genomic_DNA.
DR EMBL; BA000022; BAA17075.1; -; Genomic_DNA.
DR PIR; S14917; F2YB2K.
DR PDB; 6WJ6; EM; 2.58 A; K=1-45.
DR PDB; 7N8O; EM; 1.93 A; K/k=1-45.
DR PDB; 7RCV; EM; 2.01 A; K/k=1-45.
DR PDBsum; 6WJ6; -.
DR PDBsum; 7N8O; -.
DR PDBsum; 7RCV; -.
DR AlphaFoldDB; P15819; -.
DR SMR; P15819; -.
DR IntAct; P15819; 2.
DR STRING; 1148.1652151; -.
DR PaxDb; P15819; -.
DR EnsemblBacteria; BAA17075; BAA17075; BAA17075.
DR KEGG; syn:sml0005; -.
DR eggNOG; ENOG5032YQR; Bacteria.
DR InParanoid; P15819; -.
DR BioCyc; MetaCyc:PSBK-MON; -.
DR Proteomes; UP000001425; Chromosome.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
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:0030096; C:plasma membrane-derived thylakoid photosystem II; IDA:UniProtKB.
DR GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-UniRule.
DR HAMAP; MF_00441; PSII_PsbK; 1.
DR InterPro; IPR003687; PSII_PsbK.
DR InterPro; IPR037270; PSII_PsbK_sf.
DR PANTHER; PTHR35325; PTHR35325; 1.
DR Pfam; PF02533; PsbK; 1.
DR SUPFAM; SSF161037; SSF161037; 1.
PE 1: Evidence at protein level;
KW 3D-structure; Direct protein sequencing; Membrane; Photosynthesis;
KW Photosystem II; Reaction center; Reference proteome; Thylakoid;
KW Transmembrane; Transmembrane helix.
FT PROPEP 1..8
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00441,
FT ECO:0000269|PubMed:12069591, ECO:0000269|PubMed:1904061"
FT /id="PRO_0000029551"
FT CHAIN 9..45
FT /note="Photosystem II reaction center protein K"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00441"
FT /id="PRO_0000029552"
FT TRANSMEM 24..44
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00441"
FT HELIX 12..14
FT /evidence="ECO:0007829|PDB:7N8O"
FT HELIX 18..21
FT /evidence="ECO:0007829|PDB:7N8O"
FT HELIX 24..26
FT /evidence="ECO:0007829|PDB:7N8O"
FT HELIX 27..41
FT /evidence="ECO:0007829|PDB:7N8O"
FT TURN 42..44
FT /evidence="ECO:0007829|PDB:7N8O"
SQ SEQUENCE 45 AA; 5112 MW; 39958FEC5E1B2846 CRC64;
METIYLLAKL PEAYQIFDPL VDVLPVIPLF FLALAFVWQA AVGFK
