ID   PSAK_NOSP7              Reviewed;          86 AA.
AC   B2IWT4;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   10-JUN-2008, sequence version 1.
DT   25-MAY-2022, entry version 60.
DE   RecName: Full=Photosystem I reaction center subunit PsaK {ECO:0000255|HAMAP-Rule:MF_00474};
DE   AltName: Full=Photosystem I subunit X {ECO:0000255|HAMAP-Rule:MF_00474};
GN   Name=psaK {ECO:0000255|HAMAP-Rule:MF_00474}; OrderedLocusNames=Npun_F4580;
OS   Nostoc punctiforme (strain ATCC 29133 / PCC 73102).
OC   Bacteria; Cyanobacteria; Nostocales; Nostocaceae; Nostoc.
OX   NCBI_TaxID=63737;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 29133 / PCC 73102;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Glavina del Rio T., Dalin E., Tice H.,
RA   Pitluck S., Chain P., Malfatti S., Shin M., Vergez L., Schmutz J.,
RA   Larimer F., Land M., Hauser L., Kyrpides N., Kim E., Meeks J.C., Elhai J.,
RA   Campbell E.L., Thiel T., Longmire J., Potts M., Atlas R.;
RT   "Complete sequence of chromosome of Nostoc punctiforme ATCC 29133.";
RL   Submitted (APR-2008) to the EMBL/GenBank/DDBJ databases.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC       Rule:MF_00474}; Multi-pass membrane protein {ECO:0000255|HAMAP-
CC       Rule:MF_00474}.
CC   -!- SIMILARITY: Belongs to the PsaG/PsaK family. {ECO:0000255|HAMAP-
CC       Rule:MF_00474}.
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DR   EMBL; CP001037; ACC82940.1; -; Genomic_DNA.
DR   RefSeq; WP_012410900.1; NC_010628.1.
DR   AlphaFoldDB; B2IWT4; -.
DR   SMR; B2IWT4; -.
DR   STRING; 63737.Npun_F4580; -.
DR   EnsemblBacteria; ACC82940; ACC82940; Npun_F4580.
DR   KEGG; npu:Npun_F4580; -.
DR   eggNOG; ENOG5032YIH; Bacteria.
DR   HOGENOM; CLU_160496_1_0_3; -.
DR   OMA; ANCLGHI; -.
DR   PhylomeDB; B2IWT4; -.
DR   Proteomes; UP000001191; 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   3: Inferred from homology;
KW   Membrane; Photosynthesis; Photosystem I; Reference proteome; Thylakoid;
KW   Transmembrane; Transmembrane helix.
FT   CHAIN           1..86
FT                   /note="Photosystem I reaction center subunit PsaK"
FT                   /id="PRO_1000125782"
FT   TRANSMEM        14..34
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00474"
FT   TRANSMEM        57..77
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00474"
SQ   SEQUENCE   86 AA;  8785 MW;  076608928C60F87E CRC64;
     MFTSTLLAAA TTPLQWSPTV GLIIIIANII AIAFGKSTIK YPNAEPALPS SNLFGGFGLP
     ALLATTAFGH ILGVGAVLGL HNLGRI