Atlas One · Host Biology · Scale 03 — Molecular

p53

Transcription factor and master tumor suppressor encoded by TP53; activated by DNA damage, oncogene activation, and hypoxia. Triggers cell-cycle arrest (p21/CDKN1A), apoptosis (PUMA, BAX), and senescence. Mutated in >50% of human cancers; 'guardian of the genome.'

Also known as: TP53, tumor protein p53, p53 tumor suppressor, guardian of the genome

Scale 03 — MolecularScale
draftStatus
2026-06-06Last Reviewed
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p53

p53

Transcription factor and master tumor suppressor encoded by TP53; activated by DNA damage, oncogene activation, and hypoxia. Triggers cell-cycle arrest (p21/CDKN1A), apoptosis (PUMA, BAX), and senescence. Mutated in >50% of human cancers; 'guardian of the genome.'