External Ids for CYCS Gene
Previous GeneCards Identifiers for CYCS Gene
This gene encodes a small heme protein that functions as a central component of the electron transport chain in mitochondria. The encoded protein associates with the inner membrane of the mitochondrion where it accepts electrons from cytochrome b and transfers them to the cytochrome oxidase complex. This protein is also involved in initiation of apoptosis. Mutations in this gene are associated with autosomal dominant nonsyndromic thrombocytopenia. Numerous processed pseudogenes of this gene are found throughout the human genome.[provided by RefSeq, Jul 2010]
GeneCards Summary for CYCS Gene
CYCS (Cytochrome C, Somatic) is a Protein Coding gene. Diseases associated with CYCS include Thrombocytopenia 4 and Autosomal Thrombocytopenia With Normal Platelets. Among its related pathways are Apoptosis Modulation and Signaling and Nur77 Signaling in T-Cell. Gene Ontology (GO) annotations related to this gene include iron ion binding and electron transfer activity.
UniProtKB/Swiss-Prot Summary for CYCS Gene
Electron carrier protein. The oxidized form of the cytochrome c heme group can accept an electron from the heme group of the cytochrome c1 subunit of cytochrome reductase. Cytochrome c then transfers this electron to the cytochrome oxidase complex, the final protein carrier in the mitochondrial electron-transport chain.
Plays a role in apoptosis. Suppression of the anti-apoptotic members or activation of the pro-apoptotic members of the Bcl-2 family leads to altered mitochondrial membrane permeability resulting in release of cytochrome c into the cytosol. Binding of cytochrome c to Apaf-1 triggers the activation of caspase-9, which then accelerates apoptosis by activating other caspases.