ID   PSAF_GUITH              Reviewed;         183 AA.
AC   O78457;
DT   15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1998, sequence version 1.
DT   25-MAY-2022, entry version 85.
DE   RecName: Full=Photosystem I reaction center subunit III;
DE   AltName: Full=PSI-F;
DE   Flags: Precursor;
GN   Name=psaF;
OS   Guillardia theta (Cryptophyte) (Cryptomonas phi).
OG   Plastid; Chloroplast.
OC   Eukaryota; Cryptophyceae; Pyrenomonadales; Geminigeraceae; Guillardia.
OX   NCBI_TaxID=55529;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX   PubMed=9929392; DOI=10.1007/pl00006462;
RA   Douglas S.E., Penny S.L.;
RT   "The plastid genome of the cryptophyte alga, Guillardia theta: complete
RT   sequence and conserved synteny groups confirm its common ancestry with red
RT   algae.";
RL   J. Mol. Evol. 48:236-244(1999).
CC   -!- FUNCTION: Probably participates in efficiency of electron transfer from
CC       plastocyanin to P700 (or cytochrome c553 in algae and cyanobacteria).
CC       This plastocyanin-docking protein contributes to the specific
CC       association of plastocyanin to PSI.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000305}; Multi-pass membrane protein {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the PsaF family. {ECO:0000305}.
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DR   EMBL; AF041468; AAC35648.1; -; Genomic_DNA.
DR   RefSeq; NP_050714.1; NC_000926.1.
DR   AlphaFoldDB; O78457; -.
DR   SMR; O78457; -.
DR   GeneID; 857015; -.
DR   HOGENOM; CLU_098828_0_0_1; -.
DR   OMA; LIVDGRW; -.
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:0009538; C:photosystem I reaction center; IEA:InterPro.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-KW.
DR   Gene3D; 1.10.8.110; -; 1.
DR   InterPro; IPR003666; PSI_PsaF.
DR   InterPro; IPR036577; PSI_PsaF_sf.
DR   PANTHER; PTHR34939; PTHR34939; 1.
DR   Pfam; PF02507; PSI_PsaF; 1.
DR   SUPFAM; SSF81536; SSF81536; 1.
PE   3: Inferred from homology;
KW   Chloroplast; Membrane; Photosynthesis; Photosystem I; Plastid; Signal;
KW   Thylakoid; Transmembrane; Transmembrane helix.
FT   SIGNAL          1..20
FT                   /evidence="ECO:0000255"
FT   CHAIN           21..183
FT                   /note="Photosystem I reaction center subunit III"
FT                   /id="PRO_0000207753"
FT   TRANSMEM        102..122
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        141..161
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   183 AA;  20517 MW;  924E5DBFAE58C9EF CRC64;
     MKNRIIIFII GLFCLQPVAS HADVAGLVPC KNSKEFQRRL DSSVKKLESR LSKYEPNTPP
     YLALETQINK TKNRFTQYGN AGLLCGTDGL PHLIADGRWS HAGEFMVPGL FFLYIAGWIG
     WVGRNYVQFA SQTDKPTEKE IIIDVPVALS FISTGYIWPF AAFKEFTSGN LIAKEDEITV
     SPR