Atlas One · Host Biology · Scale 03 — Molecular

E2F1

E2F1 is the primary activating E2F transcription factor released from Rb upon CDK4/6-mediated Rb phosphorylation; drives S-phase genes (CCNE1, MCM2-7, PCNA); pro-apoptotic via ARF-p53; RB1 LOF → unchecked E2F1 → proliferation in retinoblastoma and diverse cancers.

Also known as: E2F1, E2F transcription factor 1, E2F-1, Rb-E2F axis, E2F1 cell cycle, E2F1 apoptosis, E2F1 S-phase, E2F1 RB1, activating E2F, E2F1 cancer

Scale 03 — MolecularScale
draftStatus
2026-06-07Last Reviewed
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e2f1

E2F1

E2F1 is the primary activating E2F transcription factor released from Rb upon CDK4/6-mediated Rb phosphorylation; drives S-phase genes (CCNE1, MCM2-7, PCNA); pro-apoptotic via ARF-p53; RB1 LOF → unchecked E2F1 → proliferation in retinoblastoma and diverse cancers.