ID   PSBJ_SYNY3              Reviewed;          39 AA.
AC   P73070;
DT   08-NOV-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1997, sequence version 1.
DT   03-AUG-2022, entry version 129.
DE   RecName: Full=Photosystem II reaction center protein J {ECO:0000255|HAMAP-Rule:MF_01305};
DE            Short=PSII-J {ECO:0000255|HAMAP-Rule:MF_01305};
GN   Name=psbJ {ECO:0000255|HAMAP-Rule:MF_01305}; OrderedLocusNames=smr0008;
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], FUNCTION, SUBUNIT, SUBCELLULAR LOCATION,
RP   AND DISRUPTION PHENOTYPE.
RC   STRAIN=ATCC 27184 / PCC 6803 / N-1;
RX   PubMed=8420932; DOI=10.1016/s0021-9258(18)53891-6;
RA   Lind L.K., Shukla V.K., Nyhus K.J., Pakrasi H.B.;
RT   "Genetic and immunological analyses of the cyanobacterium Synechocystis sp.
RT   PCC 6803 show that the protein encoded by the psbJ gene regulates the
RT   number of photosystem II centers in thylakoid membranes.";
RL   J. Biol. Chem. 268:1575-1579(1993).
RN   [2]
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   [3]
RP   PROTEIN SEQUENCE OF 1-12, 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   [4]
RP   FUNCTION, SUBUNIT, SUBCELLULAR LOCATION, AND DISRUPTION PHENOTYPE.
RC   STRAIN=ATCC 27184 / PCC 6803 / N-1;
RX   PubMed=11546758; DOI=10.1074/jbc.m102007200;
RA   Regel R.E., Ivleva N.B., Zer H., Meurer J., Shestakov S.V., Herrmann R.G.,
RA   Pakrasi H.B., Ohad I.;
RT   "Deregulation of electron flow within photosystem II in the absence of the
RT   PsbJ protein.";
RL   J. Biol. Chem. 276:41473-41478(2001).
CC   -!- FUNCTION: One of the components of the core complex of photosystem II
CC       (PSII), possibly involved in regulating electron flow (PubMed:11546758,
CC       PubMed:8420932). PSII is a light-driven water:plastoquinone
CC       oxidoreductase that uses light energy to abstract electrons from H(2)O,
CC       generating O(2) and a proton gradient subsequently used for ATP
CC       formation. It consists of a core antenna complex that captures photons,
CC       and an electron transfer chain that converts photonic excitation into a
CC       charge separation. {ECO:0000255|HAMAP-Rule:MF_01305,
CC       ECO:0000269|PubMed:11546758, ECO:0000269|PubMed:8420932}.
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_01305,
CC       ECO:0000269|PubMed:11546758, ECO:0000269|PubMed:12069591,
CC       ECO:0000269|PubMed:8420932}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC       Rule:MF_01305, ECO:0000269|PubMed:11546758,
CC       ECO:0000269|PubMed:12069591, ECO:0000269|PubMed:8420932}; Single-pass
CC       membrane protein {ECO:0000255|HAMAP-Rule:MF_01305, ECO:0000305}.
CC   -!- DISRUPTION PHENOTYPE: Grows about half as well as wild-type
CC       photoautotrophically, assembles about 50% PSII (PubMed:8420932).
CC       Electron flow is deregulated; forward flow from Q(A) to plastoquinone
CC       is slower while reduction of the oxygen evolving complex is faster
CC       (PubMed:11546758). {ECO:0000269|PubMed:11546758,
CC       ECO:0000269|PubMed:8420932}.
CC   -!- SIMILARITY: Belongs to the PsbJ family. {ECO:0000255|HAMAP-
CC       Rule:MF_01305}.
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DR   EMBL; M33897; -; NOT_ANNOTATED_CDS; Genomic_DNA.
DR   EMBL; BA000022; BAA17095.1; -; Genomic_DNA.
DR   PIR; A44431; A44431.
DR   PDB; 7N8O; EM; 1.93 A; J/j=1-39.
DR   PDB; 7RCV; EM; 2.01 A; J/j=1-39.
DR   PDBsum; 7N8O; -.
DR   PDBsum; 7RCV; -.
DR   AlphaFoldDB; P73070; -.
DR   SMR; P73070; -.
DR   IntAct; P73070; 2.
DR   STRING; 1148.1652171; -.
DR   PaxDb; P73070; -.
DR   EnsemblBacteria; BAA17095; BAA17095; BAA17095.
DR   KEGG; syn:smr0008; -.
DR   eggNOG; ENOG503086C; Bacteria.
DR   InParanoid; P73070; -.
DR   BioCyc; MetaCyc:PSBJ-MON; -.
DR   Proteomes; UP000001425; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0009523; C:photosystem II; IBA:GO_Central.
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_01305; PSII_PsbJ; 1.
DR   InterPro; IPR002682; PSII_PsbJ.
DR   InterPro; IPR037267; PSII_PsbJ_sf.
DR   Pfam; PF01788; PsbJ; 1.
DR   SUPFAM; SSF161021; SSF161021; 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   CHAIN           1..39
FT                   /note="Photosystem II reaction center protein J"
FT                   /id="PRO_0000216627"
FT   TRANSMEM        7..27
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01305"
FT   HELIX           9..32
FT                   /evidence="ECO:0007829|PDB:7N8O"
SQ   SEQUENCE   39 AA;  3948 MW;  4E9BC98159B23839 CRC64;
     MFAEGRIPLW VVGVVAGIGA IGVLGLFFYG AYAGLGSSM