ID   PSAK_CHLRE              Reviewed;         113 AA.
AC   P14225;
DT   01-JAN-1990, integrated into UniProtKB/Swiss-Prot.
DT   01-JAN-1990, sequence version 1.
DT   03-AUG-2022, entry version 138.
DE   RecName: Full=Photosystem I reaction center subunit psaK, chloroplastic;
DE   AltName: Full=Light-harvesting complex I 8.4 kDa protein;
DE   AltName: Full=P37 protein;
DE   AltName: Full=PSI-K;
DE   AltName: Full=Photosystem I subunit X;
DE   Flags: Precursor;
GN   Name=PSAK;
OS   Chlamydomonas reinhardtii (Chlamydomonas smithii).
OC   Eukaryota; Viridiplantae; Chlorophyta; core chlorophytes; Chlorophyceae;
OC   CS clade; Chlamydomonadales; Chlamydomonadaceae; Chlamydomonas.
OX   NCBI_TaxID=3055;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   STRAIN=137c / CC-125;
RX   PubMed=2693938; DOI=10.1007/bf00261169;
RA   Franzen L.-G., Frank G., Zuber H., Rochaix J.-D.;
RT   "Isolation and characterization of cDNA clones encoding photosystem I
RT   subunits with molecular masses 11.0, 10.0 and 8.4 kDa from Chlamydomonas
RT   reinhardtii.";
RL   Mol. Gen. Genet. 219:137-144(1989).
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   EMBL; X15166; CAA33258.1; -; mRNA.
DR   PIR; JQ0372; S06684.
DR   RefSeq; XP_001697230.1; XM_001697178.1.
DR   PDB; 6IJJ; EM; 2.89 A; K=1-113.
DR   PDB; 6IJO; EM; 3.30 A; K=1-113.
DR   PDB; 6JO5; EM; 2.90 A; K=27-113.
DR   PDB; 6JO6; EM; 2.90 A; K=27-113.
DR   PDB; 7BGI; EM; 2.54 A; K=29-112.
DR   PDB; 7BLX; EM; 3.15 A; K=29-112.
DR   PDB; 7D0J; EM; 3.42 A; K=29-113.
DR   PDB; 7DZ7; EM; 2.84 A; K=1-113.
DR   PDB; 7DZ8; EM; 3.16 A; K=1-113.
DR   PDB; 7O01; EM; 17.10 A; K/k=29-112.
DR   PDBsum; 6IJJ; -.
DR   PDBsum; 6IJO; -.
DR   PDBsum; 6JO5; -.
DR   PDBsum; 6JO6; -.
DR   PDBsum; 7BGI; -.
DR   PDBsum; 7BLX; -.
DR   PDBsum; 7D0J; -.
DR   PDBsum; 7DZ7; -.
DR   PDBsum; 7DZ8; -.
DR   PDBsum; 7O01; -.
DR   AlphaFoldDB; P14225; -.
DR   SMR; P14225; -.
DR   IntAct; P14225; 1.
DR   STRING; 3055.EDP00485; -.
DR   EnsemblPlants; PNW70544; PNW70544; CHLRE_17g724300v5.
DR   GeneID; 5722747; -.
DR   Gramene; PNW70544; PNW70544; CHLRE_17g724300v5.
DR   KEGG; cre:CHLRE_17g724300v5; -.
DR   eggNOG; ENOG502RZHF; Eukaryota.
DR   HOGENOM; CLU_158886_0_0_1; -.
DR   OMA; KADWSIG; -.
DR   OrthoDB; 1480118at2759; -.
DR   BioCyc; MetaCyc:CHLREDRAFT_192478-MON; -.
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; IPR000549; PSI_PsaG/PsaK.
DR   InterPro; IPR023618; PSI_PsaG/PsaK_dom.
DR   InterPro; IPR016370; PSI_PsaG/PsaK_pln.
DR   InterPro; IPR017493; PSI_PsaK_pln.
DR   PANTHER; PTHR34195; PTHR34195; 1.
DR   Pfam; PF01241; PSI_PSAK; 1.
DR   TIGRFAMs; TIGR03050; PS_I_psaK_plant; 1.
DR   PROSITE; PS01026; PHOTOSYSTEM_I_PSAGK; 1.
PE   1: Evidence at protein level;
KW   3D-structure; Chloroplast; Membrane; Photosynthesis; Photosystem I;
KW   Plastid; Thylakoid; Transit peptide; Transmembrane; Transmembrane helix.
FT   TRANSIT         1..26
FT                   /note="Chloroplast"
FT   CHAIN           27..113
FT                   /note="Photosystem I reaction center subunit psaK,
FT                   chloroplastic"
FT                   /id="PRO_0000029393"
FT   TRANSMEM        29..49
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        86..107
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   HELIX           33..50
FT                   /evidence="ECO:0007829|PDB:7BGI"
FT   STRAND          57..61
FT                   /evidence="ECO:0007829|PDB:7BGI"
FT   STRAND          63..65
FT                   /evidence="ECO:0007829|PDB:7DZ7"
FT   STRAND          67..69
FT                   /evidence="ECO:0007829|PDB:7BGI"
FT   STRAND          80..82
FT                   /evidence="ECO:0007829|PDB:7DZ7"
FT   HELIX           86..109
FT                   /evidence="ECO:0007829|PDB:7BGI"
SQ   SEQUENCE   113 AA;  11201 MW;  F1CD3D8C8C3FA2CC CRC64;
     MQALATRPSA IRPTKAARRS SVVVRADGFI GSSTNLIMVA STTATLAAAR FGLAPTVKKN
     TTAGLKLVDS KNSAGVISND PAGFTIVDVL AMGAAGHGLG VGIVLGLKGI GAL