ID   PSAK_SPIOL              Reviewed;          29 AA.
AC   P14627;
DT   01-APR-1990, integrated into UniProtKB/Swiss-Prot.
DT   01-AUG-1990, sequence version 2.
DT   08-NOV-2023, entry version 81.
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   Spinacia oleracea (Spinach).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   Caryophyllales; Chenopodiaceae; Chenopodioideae; Anserineae; Spinacia.
OX   NCBI_TaxID=3562;
RN   [1]
RP   PROTEIN SEQUENCE.
RX   PubMed=2689219; DOI=10.1016/0014-5793(89)81680-1;
RA   Hoshina S., Sue S., Kunishima N., Kamide K., Wada K., Itoh S.;
RT   "Characterization and N-terminal sequence of a 5 kDa polypeptide in the
RT   photosystem I core complex from spinach.";
RL   FEBS Lett. 258:305-308(1989).
RN   [2]
RP   PROTEIN SEQUENCE OF 1-27.
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).
RN   [3]
RP   PROTEIN SEQUENCE OF 1-10.
RA   Wynn R.M., Malkin R.;
RT   "The photosystem I 5.5 kDa subunit (the psaK gene product). An intrinsic
RT   subunit of the PSI reaction center complex.";
RL   FEBS Lett. 262:45-48(1990).
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000305}; Multi-pass membrane protein {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the PsaG/PsaK family. {ECO:0000305}.
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DR   PIR; S07055; S07055.
DR   PIR; S09734; S09734.
DR   Proteomes; UP001155700; Unplaced.
DR   GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
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; Chlorophyll a-b binding protein like; 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; Reference proteome; Thylakoid; Transmembrane;
KW   Transmembrane helix.
FT   CHAIN           1..>29
FT                   /note="Photosystem I reaction center subunit psaK,
FT                   chloroplastic"
FT                   /id="PRO_0000206211"
FT   TRANSMEM        3..23
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   NON_TER         29
SQ   SEQUENCE   29 AA;  3059 MW;  38AECD218210B24D CRC64;
     GDFIGSSTNL IMVTSTTLML FAGRFGLXP
//