ID   CYC6_CYAM1              Reviewed;         104 AA.
AC   Q85FS2;
DT   06-FEB-2007, integrated into UniProtKB/Swiss-Prot.
DT   01-JUN-2003, sequence version 1.
DT   03-AUG-2022, entry version 95.
DE   RecName: Full=Cytochrome c6 {ECO:0000255|HAMAP-Rule:MF_00594};
DE   AltName: Full=Cytochrome c-553 {ECO:0000255|HAMAP-Rule:MF_00594};
DE   AltName: Full=Cytochrome c553 {ECO:0000255|HAMAP-Rule:MF_00594};
DE   AltName: Full=Soluble cytochrome f {ECO:0000255|HAMAP-Rule:MF_00594};
DE   Flags: Precursor;
GN   Name=petJ {ECO:0000255|HAMAP-Rule:MF_00594};
OS   Cyanidioschyzon merolae (strain NIES-3377 / 10D) (Unicellular red alga).
OG   Plastid; Chloroplast.
OC   Eukaryota; Rhodophyta; Bangiophyceae; Cyanidiales; Cyanidiaceae;
OC   Cyanidioschyzon.
OX   NCBI_TaxID=280699;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=NIES-3377 / 10D;
RX   PubMed=12755171; DOI=10.1093/dnares/10.2.67;
RA   Ohta N., Matsuzaki M., Misumi O., Miyagishima S.-Y., Nozaki H., Tanaka K.,
RA   Shin-i T., Kohara Y., Kuroiwa T.;
RT   "Complete sequence and analysis of the plastid genome of the unicellular
RT   red alga Cyanidioschyzon merolae.";
RL   DNA Res. 10:67-77(2003).
CC   -!- FUNCTION: Functions as an electron carrier between membrane-bound
CC       cytochrome b6-f and photosystem I in oxygenic photosynthesis.
CC       {ECO:0000255|HAMAP-Rule:MF_00594}.
CC   -!- SUBUNIT: Monomer. {ECO:0000255|HAMAP-Rule:MF_00594}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid lumen
CC       {ECO:0000255|HAMAP-Rule:MF_00594}.
CC   -!- PTM: Binds 1 heme c group covalently per subunit. {ECO:0000255|HAMAP-
CC       Rule:MF_00594}.
CC   -!- SIMILARITY: Belongs to the cytochrome c family. PetJ subfamily.
CC       {ECO:0000255|HAMAP-Rule:MF_00594}.
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DR   EMBL; AB002583; BAC76273.1; -; Genomic_DNA.
DR   RefSeq; NP_849111.1; NC_004799.1.
DR   AlphaFoldDB; Q85FS2; -.
DR   SMR; Q85FS2; -.
DR   STRING; 45157.CMV209CT; -.
DR   EnsemblPlants; CMV209CT; CMV209CT; CMV209C.
DR   GeneID; 844930; -.
DR   Gramene; CMV209CT; CMV209CT; CMV209C.
DR   KEGG; cme:CymeCp179; -.
DR   eggNOG; ENOG502SB8G; Eukaryota.
DR   HOGENOM; CLU_101159_1_0_1; -.
DR   Proteomes; UP000007014; Chloroplast.
DR   GO; GO:0009543; C:chloroplast thylakoid lumen; IEA:UniProtKB-SubCell.
DR   GO; GO:0009055; F:electron transfer activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0020037; F:heme binding; IEA:InterPro.
DR   GO; GO:0005506; F:iron ion binding; IEA:InterPro.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-UniRule.
DR   Gene3D; 1.10.760.10; -; 1.
DR   HAMAP; MF_00594; Cytc_PetJ; 1.
DR   InterPro; IPR009056; Cyt_c-like_dom.
DR   InterPro; IPR036909; Cyt_c-like_dom_sf.
DR   InterPro; IPR023655; Cyt_C6.
DR   InterPro; IPR008168; Cyt_C_IC.
DR   PANTHER; PTHR34688; PTHR34688; 1.
DR   Pfam; PF13442; Cytochrome_CBB3; 1.
DR   PRINTS; PR00605; CYTCHROMECIC.
DR   SUPFAM; SSF46626; SSF46626; 1.
DR   PROSITE; PS51007; CYTC; 1.
PE   3: Inferred from homology;
KW   Chloroplast; Electron transport; Heme; Iron; Metal-binding; Photosynthesis;
KW   Plastid; Reference proteome; Signal; Thylakoid; Transport.
FT   SIGNAL          1..20
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00594"
FT   CHAIN           21..104
FT                   /note="Cytochrome c6"
FT                   /id="PRO_0000275346"
FT   BINDING         34
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00594"
FT   BINDING         37
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00594"
FT   BINDING         38
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_00594"
FT   BINDING         78
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_00594"
SQ   SEQUENCE   104 AA;  11331 MW;  2FBB62FB383CB21E CRC64;
     MKSLLTFILT TIFCIQQVWA ADLAHGEQIF SANCAACHAG GNNVIMPEKT LKLDALEANQ
     MNSVEAISTQ VRNGKNAMPS FSRLTDSDIE DVANYVLAQA KKGW