ID   PSBT_SYNY3              Reviewed;          31 AA.
AC   P74787;
DT   29-MAR-2005, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1997, sequence version 1.
DT   03-AUG-2022, entry version 115.
DE   RecName: Full=Photosystem II reaction center protein T {ECO:0000255|HAMAP-Rule:MF_00808};
DE            Short=PSII-T {ECO:0000255|HAMAP-Rule:MF_00808};
GN   Name=psbT {ECO:0000255|HAMAP-Rule:MF_00808}; OrderedLocusNames=smr0001;
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 [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   [2]
RP   PROTEIN SEQUENCE OF 1-10, 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   [3]
RP   FUNCTION, AND DISRUPTION PHENOTYPE.
RC   STRAIN=PCC 6803 / Kazusa;
RX   PubMed=18834146; DOI=10.1021/bi800804h;
RA   Bentley F.K., Luo H., Dilbeck P., Burnap R.L., Eaton-Rye J.J.;
RT   "Effects of inactivating psbM and psbT on photodamage and assembly of
RT   photosystem II in Synechocystis sp. PCC 6803.";
RL   Biochemistry 47:11637-11646(2008).
CC   -!- FUNCTION: Seems to play a role in the dimerization of PSII.
CC       {ECO:0000255|HAMAP-Rule:MF_00808, ECO:0000269|PubMed:18834146}.
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:0000269|PubMed:12069591}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC       Rule:MF_00808, ECO:0000269|PubMed:12069591}; Single-pass membrane
CC       protein {ECO:0000255|HAMAP-Rule:MF_00808}.
CC   -!- DISRUPTION PHENOTYPE: Decreased photoautotrophic growth. Decreased
CC       assembly of PSII monomers and dimers, increased levels of the CP43-less
CC       intermediate, plus an altered dimeric form. Double psbM-psbT mutants do
CC       not assemble PSII dimers. Cells are light sensitive and rapidly
CC       photoinactivated; recovery requires protein synthesis and light.
CC       {ECO:0000269|PubMed:18834146}.
CC   -!- SIMILARITY: Belongs to the PsbT family. {ECO:0000255|HAMAP-
CC       Rule:MF_00808}.
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DR   EMBL; BA000022; BAA10133.1; -; Genomic_DNA.
DR   PIR; S76281; S76281.
DR   PDB; 6WJ6; EM; 2.58 A; T=1-31.
DR   PDB; 7N8O; EM; 1.93 A; T/t=1-31.
DR   PDB; 7RCV; EM; 2.01 A; T/t=1-31.
DR   PDBsum; 6WJ6; -.
DR   PDBsum; 7N8O; -.
DR   PDBsum; 7RCV; -.
DR   AlphaFoldDB; P74787; -.
DR   SMR; P74787; -.
DR   IntAct; P74787; 5.
DR   STRING; 1148.1673336; -.
DR   PaxDb; P74787; -.
DR   EnsemblBacteria; BAA10133; BAA10133; BAA10133.
DR   KEGG; syn:smr0001; -.
DR   eggNOG; ENOG5033APQ; Bacteria.
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_00808; PSII_PsbT; 1.
DR   InterPro; IPR001743; PSII_PsbT.
DR   InterPro; IPR037268; PSII_PsbT_sf.
DR   PANTHER; PTHR36411; PTHR36411; 1.
DR   Pfam; PF01405; PsbT; 1.
DR   SUPFAM; SSF161029; SSF161029; 1.
PE   1: Evidence at protein level;
KW   3D-structure; Direct protein sequencing; Membrane; Photosynthesis;
KW   Photosystem II; Reference proteome; Thylakoid; Transmembrane;
KW   Transmembrane helix.
FT   CHAIN           1..31
FT                   /note="Photosystem II reaction center protein T"
FT                   /id="PRO_0000218007"
FT   TRANSMEM        3..23
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00808"
FT   HELIX           2..22
FT                   /evidence="ECO:0007829|PDB:7N8O"
SQ   SEQUENCE   31 AA;  3540 MW;  2E592B8E8BF45074 CRC64;
     MESVAYILVL TMALAVLFFA IAFREPPRIE K