ID   PSAF_NOSS1              Reviewed;         164 AA.
AC   P58564;
DT   23-JAN-2002, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2002, sequence version 1.
DT   25-MAY-2022, entry version 100.
DE   RecName: Full=Photosystem I reaction center subunit III;
DE   AltName: Full=PSI-F;
DE   Flags: Precursor;
GN   Name=psaF; OrderedLocusNames=all0109;
OS   Nostoc sp. (strain PCC 7120 / SAG 25.82 / UTEX 2576).
OC   Bacteria; Cyanobacteria; Nostocales; Nostocaceae; Nostoc.
OX   NCBI_TaxID=103690;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 7120 / SAG 25.82 / UTEX 2576;
RX   PubMed=11759840; DOI=10.1093/dnares/8.5.205;
RA   Kaneko T., Nakamura Y., Wolk C.P., Kuritz T., Sasamoto S., Watanabe A.,
RA   Iriguchi M., Ishikawa A., Kawashima K., Kimura T., Kishida Y., Kohara M.,
RA   Matsumoto M., Matsuno A., Muraki A., Nakazaki N., Shimpo S., Sugimoto M.,
RA   Takazawa M., Yamada M., Yasuda M., Tabata S.;
RT   "Complete genomic sequence of the filamentous nitrogen-fixing
RT   cyanobacterium Anabaena sp. strain PCC 7120.";
RL   DNA Res. 8:205-213(2001).
RN   [2]
RP   PROTEIN SEQUENCE OF 24-41, SUBUNIT, AND SUBCELLULAR LOCATION.
RC   STRAIN=PCC 7120 / SAG 25.82 / UTEX 2576;
RX   PubMed=24550276; DOI=10.1073/pnas.1320599111;
RA   Watanabe M., Semchonok D.A., Webber-Birungi M.T., Ehira S., Kondo K.,
RA   Narikawa R., Ohmori M., Boekema E.J., Ikeuchi M.;
RT   "Attachment of phycobilisomes in an antenna-photosystem I supercomplex of
RT   cyanobacteria.";
RL   Proc. Natl. Acad. Sci. U.S.A. 111:2512-2517(2014).
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   -!- SUBUNIT: The cyanobacterial PSI reaction center is composed of one copy
CC       each of PsaA,B,C,D,E,F,I,J,K,L,M and X, and forms dimeric and
CC       tetrameric complexes. {ECO:0000269|PubMed:24550276}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane
CC       {ECO:0000269|PubMed:24550276}; Multi-pass membrane protein
CC       {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the PsaF family. {ECO:0000305}.
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DR   EMBL; BA000019; BAB77633.1; -; Genomic_DNA.
DR   PIR; AE1820; AE1820.
DR   RefSeq; WP_010994286.1; NZ_RSCN01000016.1.
DR   PDB; 6JEO; EM; 3.30 A; aF/bF/cF/dF=1-164.
DR   PDB; 6K61; EM; 2.37 A; F/f=1-164.
DR   PDB; 6TCL; EM; 3.20 A; F/F1/FF=25-163, F2=25-161.
DR   PDBsum; 6JEO; -.
DR   PDBsum; 6K61; -.
DR   PDBsum; 6TCL; -.
DR   AlphaFoldDB; P58564; -.
DR   SMR; P58564; -.
DR   STRING; 103690.17135087; -.
DR   EnsemblBacteria; BAB77633; BAB77633; BAB77633.
DR   KEGG; ana:all0109; -.
DR   eggNOG; ENOG502ZBQN; Bacteria.
DR   OMA; LIVDGRW; -.
DR   OrthoDB; 1442323at2; -.
DR   Proteomes; UP000002483; 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   3D-structure; Direct protein sequencing; Membrane; Photosynthesis;
KW   Photosystem I; Reference proteome; Signal; Thylakoid; Transmembrane;
KW   Transmembrane helix.
FT   SIGNAL          1..23
FT                   /evidence="ECO:0000250"
FT   CHAIN           24..164
FT                   /note="Photosystem I reaction center subunit III"
FT                   /id="PRO_0000029348"
FT   TRANSMEM        83..103
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        124..144
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TURN            25..27
FT                   /evidence="ECO:0007829|PDB:6K61"
FT   HELIX           31..33
FT                   /evidence="ECO:0007829|PDB:6K61"
FT   HELIX           35..42
FT                   /evidence="ECO:0007829|PDB:6K61"
FT   STRAND          47..50
FT                   /evidence="ECO:0007829|PDB:6K61"
FT   HELIX           53..61
FT                   /evidence="ECO:0007829|PDB:6K61"
FT   STRAND          64..66
FT                   /evidence="ECO:0007829|PDB:6K61"
FT   STRAND          72..74
FT                   /evidence="ECO:0007829|PDB:6K61"
FT   HELIX           80..82
FT                   /evidence="ECO:0007829|PDB:6K61"
FT   HELIX           83..111
FT                   /evidence="ECO:0007829|PDB:6K61"
FT   HELIX           119..122
FT                   /evidence="ECO:0007829|PDB:6K61"
FT   HELIX           126..135
FT                   /evidence="ECO:0007829|PDB:6K61"
FT   HELIX           136..138
FT                   /evidence="ECO:0007829|PDB:6K61"
FT   HELIX           139..148
FT                   /evidence="ECO:0007829|PDB:6K61"
FT   TURN            156..158
FT                   /evidence="ECO:0007829|PDB:6K61"
SQ   SEQUENCE   164 AA;  17833 MW;  95BBAC6189C9DCBA CRC64;
     MRRLFALILV ICLSFSFAPP AKALGADLTP CAENPAFQAL AKNARNTTAD PQSGQKRFER
     YSQALCGPEG YPHLIVDGRL DRAGDFLIPS ILFLYIAGWI GWVGRAYLQA IKKDSDTEQK
     EIQLDLGIAL PIIATGFAWP AAAVKELLSG ELTAKDSEIT VSPR