For the Mouse gene set with the same name, see BIOCARTA_SKP2E2F_PATHWAY

Systematic name M6031
Brief description E2F1 Destruction Pathway
Full description or abstract E2F-1 is a transcription factor that regulates the expression of genes involved in the cell cycle and that is involved in progression of the cell cycle from G1 into S phase. Over-expression of E2F-1 can induce cellular transformation and its under-expression can repress apoptosis. Association with the tumor suppressor Rb represses E2F-1 activity, and this repression is relieved when the cdk2/cyclin E complex at the G1 to S phase transition phosphorylates Rb. Like many cell cycle regulators, E2F-1 is regulated through phosphorylation by a cyclin-dependent protein kinase, cdk2/cyclin A, and by proteolytic degradation. Phosphorylation of E2F-1 by cdk2/cyclin A leads to E2F-1 inactivation, blocking DNA binding. E2F-1 is also regulated through degradation in the proteosome at the S/G2 transition. The F box complex that degrades E2F-1 contains components shared with the complexes that target other cell cycle factors for degradation. The F box protein that specifically recruits E2F for ubiquitination and degradation is Skp2. Other components of the SCF complex include Skp1, Cul1, and cdc34. Skp2 expression is cyclical, increasing in the S/G2 transition as E2F-1 is degraded. Knowledge of E2F-1 activity and its regulation form part of the complex set of interactions regulating the cell cycle and potential targets for the treatment of cancer.
Collection C2: Curated
      CP: Canonical Pathways
            CP:BIOCARTA: BioCarta Pathways
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Source species Homo sapiens
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Version history 7.0: Changed members. Upgraded to final version of Biocarta.

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