ID   YCF4_PROMP              Reviewed;         185 AA.
AC   Q7V0U6;
DT   16-AUG-2004, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2003, sequence version 1.
DT   25-MAY-2022, entry version 91.
DE   RecName: Full=Photosystem I assembly protein Ycf4;
GN   Name=ycf4; OrderedLocusNames=PMM1156;
OS   Prochlorococcus marinus subsp. pastoris (strain CCMP1986 / NIES-2087 /
OS   MED4).
OC   Bacteria; Cyanobacteria; Synechococcales; Prochlorococcaceae;
OC   Prochlorococcus.
OX   NCBI_TaxID=59919;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CCMP1986 / NIES-2087 / MED4;
RX   PubMed=12917642; DOI=10.1038/nature01947;
RA   Rocap G., Larimer F.W., Lamerdin J.E., Malfatti S., Chain P., Ahlgren N.A.,
RA   Arellano A., Coleman M., Hauser L., Hess W.R., Johnson Z.I., Land M.L.,
RA   Lindell D., Post A.F., Regala W., Shah M., Shaw S.L., Steglich C.,
RA   Sullivan M.B., Ting C.S., Tolonen A., Webb E.A., Zinser E.R.,
RA   Chisholm S.W.;
RT   "Genome divergence in two Prochlorococcus ecotypes reflects oceanic niche
RT   differentiation.";
RL   Nature 424:1042-1047(2003).
CC   -!- FUNCTION: Seems to be required for the assembly of the photosystem I
CC       complex.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000250}; Multi-
CC       pass membrane protein {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the Ycf4 family. {ECO:0000305}.
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DR   EMBL; BX548174; CAE19615.1; -; Genomic_DNA.
DR   RefSeq; WP_011132790.1; NC_005072.1.
DR   AlphaFoldDB; Q7V0U6; -.
DR   STRING; 59919.PMM1156; -.
DR   PRIDE; Q7V0U6; -.
DR   EnsemblBacteria; CAE19615; CAE19615; PMM1156.
DR   KEGG; pmm:PMM1156; -.
DR   eggNOG; ENOG502Z7YX; Bacteria.
DR   HOGENOM; CLU_095465_0_0_3; -.
DR   OMA; RFSNYWW; -.
DR   OrthoDB; 1558391at2; -.
DR   Proteomes; UP000001026; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0009522; C:photosystem I; IEA:InterPro.
DR   GO; GO:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-UniRule.
DR   HAMAP; MF_00437; Ycf4; 1.
DR   InterPro; IPR003359; PSI_Ycf4_assembly.
DR   Pfam; PF02392; Ycf4; 1.
PE   3: Inferred from homology;
KW   Membrane; Photosynthesis; Thylakoid; Transmembrane; Transmembrane helix.
FT   CHAIN           1..185
FT                   /note="Photosystem I assembly protein Ycf4"
FT                   /id="PRO_0000217636"
FT   TRANSMEM        21..43
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        65..87
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   185 AA;  20471 MW;  036760D88D3DD149 CRC64;
     MQSNLSSFNK IEQKINGSRK ISNYLIGGML SIGGIGFILA AISSYTGRDL LPLGNPSTLL
     FIPQGIIMGA YGVIANLLNI YLWYLVFINF GSGYNFFDKD SQSVEIKRKG LFKDIEVKLS
     FDEIKSVKLD ISEGFNPRRR IALVLKGRKK PLPLSGAGEL KPLLQVEEEG ARLAKFLNVN
     LEGLK