ID   PSAF_MASLA              Reviewed;         165 AA.
AC   O31127;
DT   15-JUL-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-JAN-1998, sequence version 1.
DT   25-MAY-2022, entry version 68.
DE   RecName: Full=Photosystem I reaction center subunit III;
DE   AltName: Full=PSI-F;
DE   Flags: Precursor;
GN   Name=psaF;
OS   Mastigocladus laminosus (Fischerella sp.).
OC   Bacteria; Cyanobacteria; Nostocales; Hapalosiphonaceae; Mastigocladus.
OX   NCBI_TaxID=83541;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND PROTEIN SEQUENCE OF 24-28.
RC   STRAIN=PCC 7605;
RA   He Z.-Y., Chitnis V.P., Chitnis P.R., Nechushtai R.;
RT   "Molecular cloning of the psaF and psaJ genes of photosystem I from the
RT   thermophilic cyanobacterium Mastigocladus laminosus.";
RL   (er) Plant Gene Register PGR98-026(1998).
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}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; AF030004; AAC04842.1; -; Genomic_DNA.
DR   AlphaFoldDB; O31127; -.
DR   SMR; O31127; -.
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; Signal;
KW   Thylakoid; Transmembrane; Transmembrane helix.
FT   SIGNAL          1..23
FT                   /evidence="ECO:0000269|Ref.1"
FT   CHAIN           24..165
FT                   /note="Photosystem I reaction center subunit III"
FT                   /id="PRO_0000029350"
FT   TRANSMEM        83..103
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   165 AA;  18275 MW;  2250C9784557D948 CRC64;
     MQRLFALILA IFLWFHFAPP AQALGADLVP CSESPAFQQR AQVARNTTAD PESGKKRFER
     YSQALCGPEG LPHLIVDGRL DHAGDFLIPS ILFLYIAGWI GWVGRAYLQT IKKQGSNVEQ
     KEIQIELPIA LPIMLSGFAW PAAAIKEFLS GELTAKDEEI TISPR