ID   PSAF_PROMA              Reviewed;         183 AA.
AC   Q9X7I4;
DT   26-SEP-2001, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1999, sequence version 1.
DT   25-MAY-2022, entry version 108.
DE   RecName: Full=Photosystem I reaction center subunit III;
DE   AltName: Full=PSI-F;
DE   Flags: Precursor;
GN   Name=psaF; OrderedLocusNames=Pro_0467;
OS   Prochlorococcus marinus (strain SARG / CCMP1375 / SS120).
OC   Bacteria; Cyanobacteria; Synechococcales; Prochlorococcaceae;
OC   Prochlorococcus.
OX   NCBI_TaxID=167539;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND PROTEIN SEQUENCE OF 24-38 AND
RP   134-148.
RC   STRAIN=SARG / CCMP1375 / SS120;
RA   van der Staay G.W.M., Partensky F.;
RT   "The 21 kDa protein associated with photosystem I in Prochlorococcus
RT   marinus is the PsaF protein.";
RL   (er) Plant Gene Register PGR99-067(1999).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=SARG / CCMP1375 / SS120;
RX   PubMed=12917486; DOI=10.1073/pnas.1733211100;
RA   Dufresne A., Salanoubat M., Partensky F., Artiguenave F., Axmann I.M.,
RA   Barbe V., Duprat S., Galperin M.Y., Koonin E.V., Le Gall F., Makarova K.S.,
RA   Ostrowski M., Oztas S., Robert C., Rogozin I.B., Scanlan D.J.,
RA   Tandeau de Marsac N., Weissenbach J., Wincker P., Wolf Y.I., Hess W.R.;
RT   "Genome sequence of the cyanobacterium Prochlorococcus marinus SS120, a
RT   nearly minimal oxyphototrophic genome.";
RL   Proc. Natl. Acad. Sci. U.S.A. 100:10020-10025(2003).
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: Cellular thylakoid membrane {ECO:0000250};
CC       Single-pass membrane protein {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the PsaF family. {ECO:0000305}.
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DR   EMBL; AJ131438; CAB41403.1; -; Genomic_DNA.
DR   EMBL; AE017126; AAP99512.1; -; Genomic_DNA.
DR   RefSeq; NP_874860.1; NC_005042.1.
DR   RefSeq; WP_011124622.1; NC_005042.1.
DR   AlphaFoldDB; Q9X7I4; -.
DR   SMR; Q9X7I4; -.
DR   STRING; 167539.Pro_0467; -.
DR   EnsemblBacteria; AAP99512; AAP99512; Pro_0467.
DR   GeneID; 54199835; -.
DR   KEGG; pma:Pro_0467; -.
DR   PATRIC; fig|167539.5.peg.480; -.
DR   eggNOG; ENOG5033VYX; Bacteria.
DR   HOGENOM; CLU_098828_1_0_3; -.
DR   OMA; LIVDGRW; -.
DR   OrthoDB; 1442323at2; -.
DR   Proteomes; UP000001420; Chromosome.
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:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
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   1: Evidence at protein level;
KW   Direct protein sequencing; Membrane; Photosynthesis; Photosystem I;
KW   Reference proteome; Signal; Thylakoid; Transmembrane; Transmembrane helix.
FT   SIGNAL          1..23
FT                   /evidence="ECO:0000269|Ref.1"
FT   CHAIN           24..183
FT                   /note="Photosystem I reaction center subunit III"
FT                   /id="PRO_0000029351"
FT   TRANSMEM        102..122
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   REGION          164..183
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        165..183
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   183 AA;  19930 MW;  B31DA3518EE30FA3 CRC64;
     MRRLFSILLS AFLLLGLAPI VNAAGEAVNA DRAATDFTAS ALTTCSENTR FNERASQATT
     PKDIARFERY SKASCGDDGL PHLVIAATIE PWGALANRHH EGDILIPGHI FIYVAGIIGW
     SGREYLRASK KTKNPAENEI IIDFALARQC LIKGAAWPVE ANKQGRSGDL REKDENISLN
     GPR