ID   CYC6_CLAGO              Reviewed;          91 AA.
AC   P83391;
DT   01-NOV-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2002, sequence version 1.
DT   03-AUG-2022, entry version 83.
DE   RecName: Full=Cytochrome c6;
DE   AltName: Full=Cytochrome c-553;
DE   AltName: Full=Cytochrome c553;
DE   AltName: Full=Soluble cytochrome f;
GN   Name=petJ;
OS   Cladophora glomerata.
OC   Eukaryota; Viridiplantae; Chlorophyta; Ulvophyceae; TCBD clade;
OC   Cladophorales; Cladophoraceae; Cladophora.
OX   NCBI_TaxID=162068 {ECO:0000305};
RN   [1]
RP   PROTEIN SEQUENCE, IDENTIFICATION BY MASS SPECTROMETRY, AND X-RAY
RP   CRYSTALLOGRAPHY (1.3 ANGSTROMS).
RX   PubMed=12475218; DOI=10.1021/bi026473v;
RA   Dikiy A., Carpentier W., Vandenberghe I.H.M., Borsari M., Safarov N.,
RA   Dikaya E., Van Beeumen J., Ciurli S.;
RT   "Structural basis for the molecular properties of cytochrome c6.";
RL   Biochemistry 41:14689-14699(2002).
CC   -!- FUNCTION: Functions as an electron carrier between membrane-bound
CC       cytochrome b6-f and photosystem I in oxygenic photosynthesis.
CC   -!- SUBUNIT: Monomer.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid lumen.
CC   -!- PTM: Binds 1 heme c group covalently per subunit.
CC   -!- SIMILARITY: Belongs to the cytochrome c family. PetJ subfamily.
CC       {ECO:0000305}.
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DR   PDB; 1LS9; X-ray; 1.30 A; A=1-91.
DR   PDBsum; 1LS9; -.
DR   AlphaFoldDB; P83391; -.
DR   SMR; P83391; -.
DR   EvolutionaryTrace; P83391; -.
DR   GO; GO:0009543; C:chloroplast thylakoid lumen; IEA:UniProtKB-SubCell.
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:0015979; P:photosynthesis; IEA:UniProtKB-KW.
DR   Gene3D; 1.10.760.10; -; 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; Chloroplast; Direct protein sequencing; Electron transport;
KW   Heme; Iron; Metal-binding; Photosynthesis; Plastid; Thylakoid; Transport.
FT   CHAIN           1..91
FT                   /note="Cytochrome c6"
FT                   /id="PRO_0000208674"
FT   BINDING         17
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00433"
FT   BINDING         20
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00433"
FT   BINDING         21
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|PROSITE-ProRule:PRU00433"
FT   BINDING         63
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|PROSITE-ProRule:PRU00433"
FT   HELIX           3..16
FT                   /evidence="ECO:0007829|PDB:1LS9"
FT   HELIX           18..21
FT                   /evidence="ECO:0007829|PDB:1LS9"
FT   HELIX           22..24
FT                   /evidence="ECO:0007829|PDB:1LS9"
FT   STRAND          27..29
FT                   /evidence="ECO:0007829|PDB:1LS9"
FT   HELIX           36..42
FT                   /evidence="ECO:0007829|PDB:1LS9"
FT   HELIX           49..58
FT                   /evidence="ECO:0007829|PDB:1LS9"
FT   TURN            67..69
FT                   /evidence="ECO:0007829|PDB:1LS9"
FT   HELIX           72..87
FT                   /evidence="ECO:0007829|PDB:1LS9"
SQ   SEQUENCE   91 AA;  9833 MW;  2CAE8881CA8BD283 CRC64;
     VDAELLADGK KVFAGNCAAC HLGGNNSVLA DKTLKKDAIE KYLEGGLTLE AIKYQVNNGK
     GAMPAWADRL DEDDIEAVSN YVYDQAVNSK W