ID   CY550_PHATC             Reviewed;         163 AA.
AC   A0T0C6;
DT   24-JUL-2007, integrated into UniProtKB/Swiss-Prot.
DT   09-JAN-2007, sequence version 1.
DT   03-AUG-2022, entry version 64.
DE   RecName: Full=Cytochrome c-550 {ECO:0000255|HAMAP-Rule:MF_01378};
DE   AltName: Full=Cytochrome c550 {ECO:0000255|HAMAP-Rule:MF_01378};
DE   Flags: Precursor;
GN   Name=psbV {ECO:0000255|HAMAP-Rule:MF_01378};
OS   Phaeodactylum tricornutum (strain CCAP 1055/1).
OG   Plastid; Chloroplast.
OC   Eukaryota; Sar; Stramenopiles; Ochrophyta; Bacillariophyta;
OC   Bacillariophyceae; Bacillariophycidae; Naviculales; Phaeodactylaceae;
OC   Phaeodactylum.
OX   NCBI_TaxID=556484;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CCAP 1055/1;
RX   PubMed=17252281; DOI=10.1007/s00438-006-0199-4;
RA   Oudot-Le Secq M.-P., Grimwood J., Shapiro H., Armbrust E.V., Bowler C.,
RA   Green B.R.;
RT   "Chloroplast genomes of the diatoms Phaeodactylum tricornutum and
RT   Thalassiosira pseudonana: comparison with other plastid genomes of the red
RT   lineage.";
RL   Mol. Genet. Genomics 277:427-439(2007).
CC   -!- FUNCTION: Low-potential cytochrome c that plays a role in the oxygen-
CC       evolving complex of photosystem II. {ECO:0000255|HAMAP-Rule:MF_01378}.
CC   -!- COFACTOR:
CC       Name=heme c; Xref=ChEBI:CHEBI:61717;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01378};
CC       Note=Binds 1 heme c group covalently per subunit. {ECO:0000255|HAMAP-
CC       Rule:MF_01378};
CC   -!- SUBUNIT: The oxygen-evolving complex may be composed of psbO, psbQ',
CC       psbV and psbU. {ECO:0000305}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000255|HAMAP-Rule:MF_01378}; Peripheral membrane protein
CC       {ECO:0000255|HAMAP-Rule:MF_01378}; Lumenal side {ECO:0000255|HAMAP-
CC       Rule:MF_01378}. Note=Associated with photosystem II at the lumenal side
CC       of the thylakoid membrane. {ECO:0000255|HAMAP-Rule:MF_01378}.
CC   -!- SIMILARITY: Belongs to the cytochrome c family. PsbV subfamily.
CC       {ECO:0000255|HAMAP-Rule:MF_01378}.
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DR   EMBL; EF067920; ABK20624.1; -; Genomic_DNA.
DR   RefSeq; YP_874401.1; NC_008588.1.
DR   AlphaFoldDB; A0T0C6; -.
DR   SMR; A0T0C6; -.
DR   STRING; 556484.A0T0C6; -.
DR   PRIDE; A0T0C6; -.
DR   GeneID; 4524595; -.
DR   InParanoid; A0T0C6; -.
DR   Proteomes; UP000000759; Chloroplast.
DR   GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0009523; C:photosystem II; IEA:UniProtKB-KW.
DR   GO; GO:0009055; F:electron transfer activity; IEA:InterPro.
DR   GO; GO:0020037; F:heme binding; IEA:InterPro.
DR   GO; GO:0005506; F:iron ion binding; IEA:InterPro.
DR   GO; GO:0018063; P:cytochrome c-heme linkage; IEA:UniProtKB-UniRule.
DR   GO; GO:0019684; P:photosynthesis, light reaction; IEA:UniProtKB-UniRule.
DR   GO; GO:0022904; P:respiratory electron transport chain; IEA:InterPro.
DR   Gene3D; 1.10.760.10; -; 1.
DR   HAMAP; MF_01378; PSII_Cyt550; 1.
DR   InterPro; IPR009056; Cyt_c-like_dom.
DR   InterPro; IPR036909; Cyt_c-like_dom_sf.
DR   InterPro; IPR029490; Cytochrom_C550.
DR   InterPro; IPR016003; PSII_cyt_c550.
DR   InterPro; IPR017851; PSII_PsbV_cyt_c550.
DR   Pfam; PF14495; Cytochrom_C550; 1.
DR   PIRSF; PIRSF005890; Phot_II_cyt_c550; 1.
DR   SUPFAM; SSF46626; SSF46626; 1.
DR   TIGRFAMs; TIGR03045; PS_II_C550; 1.
DR   PROSITE; PS51007; CYTC; 1.
PE   3: Inferred from homology;
KW   Chloroplast; Electron transport; Heme; Iron; Membrane; Metal-binding;
KW   Photosynthesis; Photosystem II; Plastid; Reference proteome; Signal;
KW   Thylakoid; Transport.
FT   SIGNAL          1..26
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01378"
FT   CHAIN           27..163
FT                   /note="Cytochrome c-550"
FT                   /id="PRO_0000295614"
FT   BINDING         63
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01378"
FT   BINDING         66
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01378"
FT   BINDING         67
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01378"
FT   BINDING         130
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01378"
SQ   SEQUENCE   163 AA;  17722 MW;  933FDC8EA8C1210D CRC64;
     MFKKSSQLFS LVFFTIFSIF IGTASAIDLD EATRTVVVDS SGKTIVLTPE QVKRGKRLFN
     ATCGACHVGG VTKTNPNVGL DPEALSLATP RRDNIAGLVD FLKNPTTYDG LESIAEVHPS
     IKSADIYPRM RSVTDEDLTA MAGHILLQPK IVTEKWGGGK IYY