ID   YCF4_PARMW              Reviewed;         178 AA.
AC   Q7U8E3;
DT   16-AUG-2004, integrated into UniProtKB/Swiss-Prot.
DT   18-MAR-2008, sequence version 2.
DT   03-AUG-2022, entry version 98.
DE   RecName: Full=Photosystem I assembly protein Ycf4;
GN   Name=ycf4; OrderedLocusNames=SYNW0678;
OS   Parasynechococcus marenigrum (strain WH8102).
OC   Bacteria; Cyanobacteria; Synechococcales; Prochlorococcaceae;
OC   Parasynechococcus; Parasynechococcus marenigrum.
OX   NCBI_TaxID=84588;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=WH8102;
RX   PubMed=12917641; DOI=10.1038/nature01943;
RA   Palenik B., Brahamsha B., Larimer F.W., Land M.L., Hauser L., Chain P.,
RA   Lamerdin J.E., Regala W., Allen E.E., McCarren J., Paulsen I.T.,
RA   Dufresne A., Partensky F., Webb E.A., Waterbury J.;
RT   "The genome of a motile marine Synechococcus.";
RL   Nature 424:1037-1042(2003).
CC   -!- FUNCTION: Seems to be required for the assembly of the photosystem I
CC       complex. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000250}; Multi-
CC       pass membrane protein {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the Ycf4 family. {ECO:0000305}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=CAE07193.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR   EMBL; BX569690; CAE07193.1; ALT_INIT; Genomic_DNA.
DR   RefSeq; WP_042503100.1; NC_005070.1.
DR   AlphaFoldDB; Q7U8E3; -.
DR   STRING; 84588.SYNW0678; -.
DR   EnsemblBacteria; CAE07193; CAE07193; SYNW0678.
DR   KEGG; syw:SYNW0678; -.
DR   eggNOG; ENOG502Z7YX; Bacteria.
DR   HOGENOM; CLU_095465_0_0_3; -.
DR   OMA; RFSNYWW; -.
DR   OrthoDB; 1558391at2; -.
DR   Proteomes; UP000001422; 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..178
FT                   /note="Photosystem I assembly protein Ycf4"
FT                   /id="PRO_0000217639"
FT   TRANSMEM        19..41
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        61..83
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   178 AA;  19105 MW;  67FE2AF0D26E0187 CRC64;
     MSAEVLEQPV LGSRRLSNYL VAAAVSIGGI GFLLASLSSY LGRDLLPLGH PAALIFVPQG
     LVMGLYSIAA ALLATYLWYV IAVDVGGGSN RFDKAAGVVT VSRRGFRKPV LVEIPLKDVK
     AVKVEVRDGF NARRRVALRI QGRRDMPLTR VGEPLPLAQL EQDGAELARF LGVNLEGL