ID   PSAK1_SYNY3             Reviewed;          86 AA.
AC   P72712;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1997, sequence version 1.
DT   03-AUG-2022, entry version 132.
DE   RecName: Full=Photosystem I reaction center subunit PsaK 1;
DE   AltName: Full=Photosystem I subunit X 1;
DE   Flags: Precursor;
GN   Name=psaK1; Synonyms=psaK; OrderedLocusNames=ssr0390;
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).
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000250}; Multi-
CC       pass membrane protein {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the PsaG/PsaK family. {ECO:0000305}.
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DR   EMBL; BA000022; BAA16719.1; -; Genomic_DNA.
DR   PIR; S74567; S74567.
DR   PDB; 6NWA; EM; 3.48 A; K/T/k=1-86.
DR   PDBsum; 6NWA; -.
DR   AlphaFoldDB; P72712; -.
DR   SMR; P72712; -.
DR   IntAct; P72712; 1.
DR   STRING; 1148.1651792; -.
DR   PaxDb; P72712; -.
DR   EnsemblBacteria; BAA16719; BAA16719; BAA16719.
DR   KEGG; syn:ssr0390; -.
DR   eggNOG; ENOG5032YIH; Bacteria.
DR   OMA; ANCLGHI; -.
DR   BioCyc; MetaCyc:PSAK-MON; -.
DR   Proteomes; UP000001425; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0009522; C:photosystem I; IEA:UniProtKB-KW.
DR   GO; GO:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-UniRule.
DR   Gene3D; 1.20.860.20; -; 1.
DR   HAMAP; MF_00474; PSI_PsaK; 1.
DR   InterPro; IPR035982; PSI_centre_PsaK_sf.
DR   InterPro; IPR000549; PSI_PsaG/PsaK.
DR   InterPro; IPR017492; PSI_PsaK.
DR   InterPro; IPR037101; PSI_PsaK_bact.
DR   Pfam; PF01241; PSI_PSAK; 1.
DR   SUPFAM; SSF81563; SSF81563; 1.
DR   TIGRFAMs; TIGR03049; PS_I_psaK; 1.
DR   PROSITE; PS01026; PHOTOSYSTEM_I_PSAGK; 1.
PE   1: Evidence at protein level;
KW   3D-structure; Membrane; Photosynthesis; Photosystem I; Reference proteome;
KW   Thylakoid; Transmembrane; Transmembrane helix.
FT   PROPEP          1..?
FT                   /evidence="ECO:0000255"
FT                   /id="PRO_0000029408"
FT   CHAIN           ?..86
FT                   /note="Photosystem I reaction center subunit PsaK 1"
FT                   /id="PRO_0000029409"
FT   TRANSMEM        14..34
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        61..81
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   86 AA;  8644 MW;  5F0BEAD1B9E99E3B CRC64;
     MHSFLLATAV PATLSWSPKV AGVMIACNIL AIAFGKLTIK QQNVGTPMPS SNFFGGFGLG
     AVLGTASFGH ILGAGVILGL ANMGVL