ID   CYC6_THEVB              Reviewed;         112 AA.
AC   P0A3X9; P56534; Q9F1M0;
DT   15-MAR-2005, integrated into UniProtKB/Swiss-Prot.
DT   15-MAR-2005, sequence version 1.
DT   03-AUG-2022, entry version 106.
DE   RecName: Full=Cytochrome c6;
DE   AltName: Full=Cytochrome c-553;
DE   AltName: Full=Cytochrome c553;
DE   AltName: Full=Soluble cytochrome f;
DE   Flags: Precursor;
GN   Name=petJ; OrderedLocusNames=tll1283;
OS   Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1).
OC   Bacteria; Cyanobacteria; Pseudanabaenales; Thermosynechococcaceae;
OC   Thermosynechococcus.
OX   NCBI_TaxID=197221;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA   Katoh H., Itoh S., Shen J.-R., Ikeuchi M.;
RT   "Cloning of the genes for cytochrome c550 and a c550-like protein from the
RT   thermophilic cyanobacterium Synechococcus elongatus.";
RL   Plant Cell Physiol. 40:89-89(1999).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=NIES-2133 / IAM M-273 / BP-1;
RX   PubMed=12240834; DOI=10.1093/dnares/9.4.123;
RA   Nakamura Y., Kaneko T., Sato S., Ikeuchi M., Katoh H., Sasamoto S.,
RA   Watanabe A., Iriguchi M., Kawashima K., Kimura T., Kishida Y., Kiyokawa C.,
RA   Kohara M., Matsumoto M., Matsuno A., Nakazaki N., Shimpo S., Sugimoto M.,
RA   Takeuchi C., Yamada M., Tabata S.;
RT   "Complete genome structure of the thermophilic cyanobacterium
RT   Thermosynechococcus elongatus BP-1.";
RL   DNA Res. 9:123-130(2002).
CC   -!- FUNCTION: Functions as an electron carrier between membrane-bound
CC       cytochrome b6-f and photosystem I in oxygenic photosynthesis.
CC       {ECO:0000250}.
CC   -!- SUBUNIT: Monomer. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid lumen {ECO:0000305}.
CC   -!- PTM: Binds 1 heme c group covalently per subunit. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the cytochrome c family. PetJ subfamily.
CC       {ECO:0000305}.
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DR   EMBL; AB052597; BAB20061.1; -; Genomic_DNA.
DR   EMBL; BA000039; BAC08835.1; -; Genomic_DNA.
DR   RefSeq; NP_682073.1; NC_004113.1.
DR   RefSeq; WP_011057123.1; NC_004113.1.
DR   PDB; 6TR1; X-ray; 1.70 A; A/E=26-111, C=26-112.
DR   PDB; 6TSY; X-ray; 2.25 A; A/B/C/D/E/F=26-112.
DR   PDBsum; 6TR1; -.
DR   PDBsum; 6TSY; -.
DR   AlphaFoldDB; P0A3X9; -.
DR   SMR; P0A3X9; -.
DR   STRING; 197221.22295007; -.
DR   EnsemblBacteria; BAC08835; BAC08835; BAC08835.
DR   KEGG; tel:tll1283; -.
DR   PATRIC; fig|197221.4.peg.1350; -.
DR   eggNOG; COG2010; Bacteria.
DR   OMA; GQNVIMP; -.
DR   OrthoDB; 1939800at2; -.
DR   Proteomes; UP000000440; 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   1: Evidence at protein level;
KW   3D-structure; Electron transport; Heme; Iron; Metal-binding;
KW   Photosynthesis; Reference proteome; Signal; Thylakoid; Transport.
FT   SIGNAL          1..25
FT                   /evidence="ECO:0000250"
FT   CHAIN           26..112
FT                   /note="Cytochrome c6"
FT                   /id="PRO_0000023857"
FT   BINDING         39
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /note="covalent"
FT                   /evidence="ECO:0000250"
FT   BINDING         42
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /note="covalent"
FT                   /evidence="ECO:0000250"
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:0000250"
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:0000250"
FT   HELIX           28..38
FT                   /evidence="ECO:0007829|PDB:6TR1"
FT   HELIX           40..43
FT                   /evidence="ECO:0007829|PDB:6TR1"
FT   HELIX           44..46
FT                   /evidence="ECO:0007829|PDB:6TR1"
FT   STRAND          49..51
FT                   /evidence="ECO:0007829|PDB:6TR1"
FT   HELIX           58..63
FT                   /evidence="ECO:0007829|PDB:6TR1"
FT   HELIX           69..78
FT                   /evidence="ECO:0007829|PDB:6TR1"
FT   TURN            87..89
FT                   /evidence="ECO:0007829|PDB:6TR1"
FT   HELIX           92..108
FT                   /evidence="ECO:0007829|PDB:6TR1"
SQ   SEQUENCE   112 AA;  11762 MW;  F9C2A62E88CB0305 CRC64;
     MKKRFISVCA IAIALLVSLT PAALAADLAN GAKVFSGNCA ACHMGGGNVV MANKTLKKEA
     LEQFGMYSED AIIYQVQHGK NAMPAFAGRL TDEQIQDVAA YVLDQAAKGW AG