ID   CYC6_GLOC7              Reviewed;         110 AA.
AC   B7K722;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   10-FEB-2009, sequence version 1.
DT   03-AUG-2022, entry version 66.
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};
GN   OrderedLocusNames=PCC7424_4355;
OS   Gloeothece citriformis (strain PCC 7424) (Cyanothece sp. (strain PCC
OS   7424)).
OC   Bacteria; Cyanobacteria; Oscillatoriophycideae; Chroococcales;
OC   Aphanothecaceae; Gloeothece; Gloeothece citriformis.
OX   NCBI_TaxID=65393;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 7424;
RX   PubMed=21972240; DOI=10.1128/mbio.00214-11;
RA   Bandyopadhyay A., Elvitigala T., Welsh E., Stockel J., Liberton M., Min H.,
RA   Sherman L.A., Pakrasi H.B.;
RT   "Novel metabolic attributes of the genus Cyanothece, comprising a group of
RT   unicellular nitrogen-fixing Cyanobacteria.";
RL   MBio 2:E214-E214(2011).
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: Cellular thylakoid lumen {ECO:0000255|HAMAP-
CC       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; CP001291; ACK72721.1; -; Genomic_DNA.
DR   RefSeq; WP_015956306.1; NC_011729.1.
DR   AlphaFoldDB; B7K722; -.
DR   SMR; B7K722; -.
DR   STRING; 65393.PCC7424_4355; -.
DR   EnsemblBacteria; ACK72721; ACK72721; PCC7424_4355.
DR   KEGG; cyc:PCC7424_4355; -.
DR   eggNOG; COG2010; Bacteria.
DR   HOGENOM; CLU_101159_1_0_3; -.
DR   OMA; GQNVIMP; -.
DR   OrthoDB; 1939800at2; -.
DR   Proteomes; UP000002384; Chromosome.
DR   GO; GO:0031979; C:plasma membrane-derived 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   Electron transport; Heme; Iron; Metal-binding; Photosynthesis;
KW   Reference proteome; Signal; Thylakoid; Transport.
FT   SIGNAL          1..25
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00594"
FT   CHAIN           26..110
FT                   /note="Cytochrome c6"
FT                   /id="PRO_5000418014"
FT   BINDING         39
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00594"
FT   BINDING         42
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00594"
FT   BINDING         43
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         83
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   110 AA;  11722 MW;  2D0AEAD1E8ACA819 CRC64;
     MKKLVSSVIL ALILFGFSWV SPAFAGDAGN GSKVFSANCN ACHLGGKNVV NAAKTLNKSD
     LEKYAMLDLE AIKTQVTNGK GAMPAFGKRL TPDQIEDVAT YVLEKAEKGW