ID   CYC_EQUQB               Reviewed;         105 AA.
AC   P68096; P00005;
DT   21-JUL-1986, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 2.
DT   03-AUG-2022, entry version 79.
DE   RecName: Full=Cytochrome c;
GN   Name=CYCS; Synonyms=CYC;
OS   Equus quagga burchellii (Plains zebra) (Equus burchelli).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC   Eutheria; Laurasiatheria; Perissodactyla; Equidae; Equus; Equus quagga.
OX   NCBI_TaxID=89252;
RN   [1]
RP   AMINO-ACID COMPOSITION, AND PROTEIN SEQUENCE OF 41-49.
RC   TISSUE=Heart;
RX   PubMed=11946095; DOI=10.1016/0014-5793(71)80419-2;
RA   Guertler L., Horstmann H.J.;
RT   "Of the primary structure of cytochromes c of Plains zebra (Equus quagga
RT   boehmi).";
RL   FEBS Lett. 18:106-108(1971).
CC   -!- FUNCTION: Electron carrier protein. The oxidized form of the cytochrome
CC       c heme group can accept an electron from the heme group of the
CC       cytochrome c1 subunit of cytochrome reductase. Cytochrome c then
CC       transfers this electron to the cytochrome oxidase complex, the final
CC       protein carrier in the mitochondrial electron-transport chain.
CC   -!- FUNCTION: Plays a role in apoptosis. Suppression of the anti-apoptotic
CC       members or activation of the pro-apoptotic members of the Bcl-2 family
CC       leads to altered mitochondrial membrane permeability resulting in
CC       release of cytochrome c into the cytosol. Binding of cytochrome c to
CC       Apaf-1 triggers the activation of caspase-9, which then accelerates
CC       apoptosis by activating other caspases (By similarity). {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Mitochondrion intermembrane space. Note=Loosely
CC       associated with the inner membrane.
CC   -!- PTM: Binds 1 heme c group covalently per subunit.
CC   -!- PTM: Phosphorylation at Tyr-49 and Tyr-98 both reduce by half the
CC       turnover in the reaction with cytochrome c oxidase, down-regulating
CC       mitochondrial respiration. {ECO:0000250}.
CC   -!- MISCELLANEOUS: Mules and hinnies are heterozygous, having equal amount
CC       of horse and donkey cytochromes c.
CC   -!- SIMILARITY: Belongs to the cytochrome c family. {ECO:0000305}.
CC   -!- WEB RESOURCE: Name=Protein Spotlight; Note=Life shuttle - Issue 76 of
CC       November 2006;
CC       URL="https://web.expasy.org/spotlight/back_issues/076";
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DR   PIR; A91330; CCHOZ.
DR   AlphaFoldDB; P68096; -.
DR   BMRB; P68096; -.
DR   SMR; P68096; -.
DR   GO; GO:0005758; C:mitochondrial intermembrane space; IEA:UniProtKB-SubCell.
DR   GO; GO:0070469; C:respirasome; 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:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0006915; P:apoptotic process; 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; IPR002327; Cyt_c_1A/1B.
DR   PANTHER; PTHR11961; PTHR11961; 1.
DR   Pfam; PF00034; Cytochrom_C; 1.
DR   PRINTS; PR00604; CYTCHRMECIAB.
DR   SUPFAM; SSF46626; SSF46626; 1.
DR   PROSITE; PS51007; CYTC; 1.
PE   1: Evidence at protein level;
KW   Acetylation; Apoptosis; Direct protein sequencing; Electron transport;
KW   Heme; Iron; Metal-binding; Mitochondrion; Phosphoprotein;
KW   Respiratory chain; Transport.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000250|UniProtKB:P62894"
FT   CHAIN           2..105
FT                   /note="Cytochrome c"
FT                   /id="PRO_0000108213"
FT   BINDING         15
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /note="covalent"
FT   BINDING         18
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /note="covalent"
FT   BINDING         19
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   BINDING         81
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   MOD_RES         2
FT                   /note="N-acetylglycine"
FT                   /evidence="ECO:0000250|UniProtKB:P62894"
FT   MOD_RES         49
FT                   /note="Phosphotyrosine"
FT                   /evidence="ECO:0000250|UniProtKB:P62894"
FT   MOD_RES         56
FT                   /note="N6-succinyllysine"
FT                   /evidence="ECO:0000250|UniProtKB:P62897"
FT   MOD_RES         73
FT                   /note="N6-acetyllysine; alternate"
FT                   /evidence="ECO:0000250|UniProtKB:P62897"
FT   MOD_RES         73
FT                   /note="N6-succinyllysine; alternate"
FT                   /evidence="ECO:0000250|UniProtKB:P62897"
FT   MOD_RES         98
FT                   /note="Phosphotyrosine"
FT                   /evidence="ECO:0000250|UniProtKB:P62894"
FT   MOD_RES         100
FT                   /note="N6-acetyllysine"
FT                   /evidence="ECO:0000250|UniProtKB:P62897"
SQ   SEQUENCE   105 AA;  11819 MW;  659CA628E23B3868 CRC64;
     MGDVEKGKKI FVQKCAQCHT VEKGGKHKTG PNLHGLFGRK TGQAPGFSYT DANKNKGITW
     KEETLMEYLE NPKKYIPGTK MIFAGIKKKT EREDLIAYLK KATNE