ID   YCF4_SYNY3              Reviewed;         188 AA.
AC   P72705; Q55299;
DT   29-AUG-2001, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1997, sequence version 1.
DT   25-MAY-2022, entry version 122.
DE   RecName: Full=Photosystem I assembly protein Ycf4 {ECO:0000255|HAMAP-Rule:MF_00437};
GN   Name=ycf4 {ECO:0000255|HAMAP-Rule:MF_00437}; OrderedLocusNames=sll0226;
OS   Synechocystis sp. (strain PCC 6803 / Kazusa).
OC   Bacteria; Cyanobacteria; Synechococcales; Merismopediaceae; Synechocystis;
OC   unclassified Synechocystis.
OX   NCBI_TaxID=1111708;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=7780311; DOI=10.2307/3870122;
RA   Wilde A., Hartel H., Hubschmann T., Hoffman P., Shestakov S.V., Borner T.;
RT   "Inactivation of a Synechocystis sp strain PCC 6803 gene with homology to
RT   conserved chloroplast open reading frame 184 increases the photosystem II-
RT   to-photosystem I ratio.";
RL   Plant Cell 7:649-658(1995).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 6803 / Kazusa;
RX   PubMed=8905231; DOI=10.1093/dnares/3.3.109;
RA   Kaneko T., Sato S., Kotani H., Tanaka A., Asamizu E., Nakamura Y.,
RA   Miyajima N., Hirosawa M., Sugiura M., Sasamoto S., Kimura T., Hosouchi T.,
RA   Matsuno A., Muraki A., Nakazaki N., Naruo K., Okumura S., Shimpo S.,
RA   Takeuchi C., Wada T., Watanabe A., Yamada M., Yasuda M., Tabata S.;
RT   "Sequence analysis of the genome of the unicellular cyanobacterium
RT   Synechocystis sp. strain PCC6803. II. Sequence determination of the entire
RT   genome and assignment of potential protein-coding regions.";
RL   DNA Res. 3:109-136(1996).
CC   -!- FUNCTION: Seems to be required for the assembly of the photosystem I
CC       complex.
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}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=CAA81793.1; Type=Frameshift; Evidence={ECO:0000305};
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DR   EMBL; Z27404; CAA81793.1; ALT_FRAME; Genomic_DNA.
DR   EMBL; BA000022; BAA16712.1; -; Genomic_DNA.
DR   PIR; S74560; S74560.
DR   AlphaFoldDB; P72705; -.
DR   IntAct; P72705; 3.
DR   STRING; 1148.1651785; -.
DR   PaxDb; P72705; -.
DR   EnsemblBacteria; BAA16712; BAA16712; BAA16712.
DR   KEGG; syn:sll0226; -.
DR   eggNOG; ENOG502Z7YX; Bacteria.
DR   InParanoid; P72705; -.
DR   OMA; RFSNYWW; -.
DR   Proteomes; UP000001425; 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_0000217640"
FT   TRANSMEM        26..48
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00437"
FT   TRANSMEM        63..85
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00437"
SQ   SEQUENCE   188 AA;  20454 MW;  8A38A54995007983 CRC64;
     MGGQTLAESS QVLRQEVLGA RRFSNFFWAG ISTIGGVGFL LAGLSSYFGK NLLIVSDTTG
     LQFIPQGVAL LFYGVAGSTV AGYLWLTMAL NVGSGYNEFN KKSGQVTIFR WGFPGKNRRI
     ELINKIADVQ AVKAEIKEGV NPKRSLYLKV KQRRDIPLTR AGQPISLSQL ENQGAELARF
     LGVPLEGL