ID   YCF4_SYNP2              Reviewed;         188 AA.
AC   O68611; B1XJW7;
DT   29-AUG-2001, integrated into UniProtKB/Swiss-Prot.
DT   10-JUN-2008, sequence version 2.
DT   25-MAY-2022, entry version 109.
DE   RecName: Full=Photosystem I assembly protein Ycf4 {ECO:0000255|HAMAP-Rule:MF_00437};
GN   Name=ycf4 {ECO:0000255|HAMAP-Rule:MF_00437};
GN   OrderedLocusNames=SYNPCC7002_A1093;
OS   Synechococcus sp. (strain ATCC 27264 / PCC 7002 / PR-6) (Agmenellum
OS   quadruplicatum).
OC   Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae; Synechococcus;
OC   unclassified Synechococcus.
OX   NCBI_TaxID=32049;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA   Inoue K., Shen G., Long W.P., Bryant D.A., Sodeinde O.A.;
RL   Submitted (MAR-1998) to the EMBL/GenBank/DDBJ databases.
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 27264 / PCC 7002 / PR-6;
RA   Li T., Zhao J., Zhao C., Liu Z., Zhao F., Marquardt J., Nomura C.T.,
RA   Persson S., Detter J.C., Richardson P.M., Lanz C., Schuster S.C., Wang J.,
RA   Li S., Huang X., Cai T., Yu Z., Luo J., Zhao J., Bryant D.A.;
RT   "Complete sequence of Synechococcus sp. PCC 7002.";
RL   Submitted (FEB-2008) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Seems to be required for the assembly of the photosystem I
CC       complex. {ECO:0000255|HAMAP-Rule:MF_00437}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC       Rule:MF_00437}; Multi-pass membrane protein {ECO:0000255|HAMAP-
CC       Rule:MF_00437}.
CC   -!- SIMILARITY: Belongs to the Ycf4 family. {ECO:0000255|HAMAP-
CC       Rule:MF_00437}.
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DR   EMBL; AF052290; AAC18970.1; -; Genomic_DNA.
DR   EMBL; CP000951; ACA99095.1; -; Genomic_DNA.
DR   RefSeq; WP_012306718.1; NC_010475.1.
DR   AlphaFoldDB; O68611; -.
DR   STRING; 32049.SYNPCC7002_A1093; -.
DR   EnsemblBacteria; ACA99095; ACA99095; SYNPCC7002_A1093.
DR   KEGG; syp:SYNPCC7002_A1093; -.
DR   eggNOG; ENOG502Z7YX; Bacteria.
DR   HOGENOM; CLU_095465_0_0_3; -.
DR   OMA; RFSNYWW; -.
DR   Proteomes; UP000001688; 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; Reference proteome; Thylakoid; Transmembrane;
KW   Transmembrane helix.
FT   CHAIN           1..188
FT                   /note="Photosystem I assembly protein Ycf4"
FT                   /id="PRO_0000217638"
FT   TRANSMEM        26..48
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00437"
FT   TRANSMEM        68..90
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00437"
FT   CONFLICT        15..16
FT                   /note="QP -> HA (in Ref. 1; AAC18970)"
FT                   /evidence="ECO:0000305"
SQ   SEQUENCE   188 AA;  20766 MW;  A50E31BB52D5D649 CRC64;
     MAAQVTTSTD KVLRQPILGS RRFSNMLWAS VSAIGGIGFL LAGLSSYFHK NLLGVSDPSN
     IQFIPQGAAL TFYGVAGTLL SAYLWFVFFL DVGGGYNEFN KETGKVTIFR NGFVGKNRII
     NFQYPLKDIL SIRAEIKEGL NPRRVLYLRV KNRGDIPLNR VGEPIPLAEL ENQGAELARF
     LTIPLEGL