ID   PSAK_PEA                Reviewed;          20 AA.
AC   P17226;
DT   01-AUG-1990, integrated into UniProtKB/Swiss-Prot.
DT   01-AUG-1990, sequence version 1.
DT   25-MAY-2022, entry version 80.
DE   RecName: Full=Photosystem I reaction center subunit psaK, chloroplastic;
DE   AltName: Full=Light-harvesting 5 kDa protein;
DE   AltName: Full=PSI-K;
DE   AltName: Full=Photosystem I subunit X;
DE   Flags: Fragment;
GN   Name=PSAK;
OS   Pisum sativum (Garden pea).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   rosids; fabids; Fabales; Fabaceae; Papilionoideae; 50 kb inversion clade;
OC   NPAAA clade; Hologalegina; IRL clade; Fabeae; Pisum.
OX   NCBI_TaxID=3888;
RN   [1]
RP   PROTEIN SEQUENCE.
RX   PubMed=2185953; DOI=10.1016/0014-5793(90)81391-z;
RA   Ikeuchi M., Hirano A., Hiyama T., Inoue Y.;
RT   "Polypeptide composition of higher plant photosystem I complex.
RT   Identification of psaI, psaJ and psaK gene products.";
RL   FEBS Lett. 263:274-278(1990).
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000250}; Multi-pass membrane protein {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the PsaG/PsaK family. {ECO:0000305}.
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DR   PIR; S09735; S09735.
DR   AlphaFoldDB; P17226; -.
DR   GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
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:0015979; P:photosynthesis; IEA:UniProtKB-KW.
DR   Gene3D; 1.10.286.40; -; 1.
DR   InterPro; IPR023618; PSI_PsaG/PsaK_dom.
PE   1: Evidence at protein level;
KW   Chloroplast; Direct protein sequencing; Membrane; Photosynthesis;
KW   Photosystem I; Plastid; Thylakoid; Transmembrane; Transmembrane helix.
FT   CHAIN           1..>20
FT                   /note="Photosystem I reaction center subunit psaK,
FT                   chloroplastic"
FT                   /id="PRO_0000206210"
FT   TRANSMEM        2..>20
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   NON_TER         20
SQ   SEQUENCE   20 AA;  2148 MW;  0B23BB7E72C7F724 CRC64;
     DFIGSSTNVI MVASTTLMLF