ID   YCF4_NOSS1              Reviewed;         198 AA.
AC   Q8YPA9;
DT   06-JUN-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-MAR-2002, sequence version 1.
DT   03-AUG-2022, entry version 91.
DE   RecName: Full=Photosystem I assembly protein Ycf4 {ECO:0000255|HAMAP-Rule:MF_00437};
GN   Name=ycf4 {ECO:0000255|HAMAP-Rule:MF_00437}; OrderedLocusNames=all4289;
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).
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; BA000019; BAB75988.1; -; Genomic_DNA.
DR   PIR; AB2342; AB2342.
DR   RefSeq; WP_010998427.1; NZ_RSCN01000010.1.
DR   AlphaFoldDB; Q8YPA9; -.
DR   SMR; Q8YPA9; -.
DR   STRING; 103690.17133425; -.
DR   EnsemblBacteria; BAB75988; BAB75988; BAB75988.
DR   KEGG; ana:all4289; -.
DR   eggNOG; ENOG502Z7YX; Bacteria.
DR   OMA; RFSNYWW; -.
DR   OrthoDB; 1558391at2; -.
DR   Proteomes; UP000002483; 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..198
FT                   /note="Photosystem I assembly protein Ycf4"
FT                   /id="PRO_0000217632"
FT   TRANSMEM        36..58
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00437"
FT   TRANSMEM        78..100
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00437"
FT   REGION          1..20
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   198 AA;  21809 MW;  C307C9A55FAA3AEB CRC64;
     MTASTTINKG DSPNGDSSAS SVLHQKVLGS RRFSNYWWAS IVTLGASGFF LAGISSYLRV
     NLLIVTDPTQ LIFVPQGLVM GLYGTAGLLL ASYLWLVILW DLGGGYNDFN RETGNIKIFR
     WGFPGKNRKI EIGSRIQDIQ SVRVDIKEGL NPRRALYLRV KGRRDIPLTR VGQPLSLAEL
     ETQGAQLARF LGVPLEGL