ID   PSAF_GRATL              Reviewed;         187 AA.
AC   Q6B948;
DT   06-FEB-2007, integrated into UniProtKB/Swiss-Prot.
DT   13-SEP-2004, sequence version 1.
DT   25-MAY-2022, entry version 50.
DE   RecName: Full=Photosystem I reaction center subunit III;
DE   AltName: Full=PSI-F;
DE   Flags: Precursor;
GN   Name=psaF; OrderedLocusNames=Grc000005;
OS   Gracilaria tenuistipitata var. liui (Red alga).
OG   Plastid; Chloroplast.
OC   Eukaryota; Rhodophyta; Florideophyceae; Rhodymeniophycidae; Gracilariales;
OC   Gracilariaceae; Agarophyton; Agarophyton tenuistipitatum.
OX   NCBI_TaxID=285951;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX   PubMed=15638458; DOI=10.1007/s00239-004-2638-3;
RA   Hagopian J.C., Reis M., Kitajima J.P., Bhattacharya D., de Oliveira M.C.;
RT   "Comparative analysis of the complete plastid genome sequence of the red
RT   alga Gracilaria tenuistipitata var. liui provides insights into the
RT   evolution of rhodoplasts and their relationship to other plastids.";
RL   J. Mol. Evol. 59:464-477(2004).
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; Single-
CC       pass membrane protein.
CC   -!- SIMILARITY: Belongs to the PsaF family. {ECO:0000305}.
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DR   EMBL; AY673996; AAT79587.1; -; Genomic_DNA.
DR   RefSeq; YP_063512.1; NC_006137.1.
DR   AlphaFoldDB; Q6B948; -.
DR   SMR; Q6B948; -.
DR   GeneID; 2944111; -.
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..24
FT                   /evidence="ECO:0000255"
FT   CHAIN           25..187
FT                   /note="Photosystem I reaction center subunit III"
FT                   /id="PRO_0000277389"
FT   TRANSMEM        106..126
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   187 AA;  20814 MW;  F0B8B8046C4B87E3 CRC64;
     MKKICVLFCM IILYTSINPI NSLAEVETAG LTKCQESPAF TKRLNNSVKK LETRLAKYDA
     NTPPAIALQT QIIKTKIRFN KYAKSGILCG TDGLPHLITD GRWNHAGEFM IPGVLFLYIT
     GWIGWVGRGY LRDISQTTKP TEKEIILDVP LALKYCLSGF TWPLAAIKEL TSGELVADNK
     DIPISPR