Atlas One · Host Biology · Scale 03 — Molecular

CDKN2A

CDKN2A at 9p21 encodes p16/INK4A (CDK4/6 inhibitor → RB1 G1 checkpoint) and p14/ARF (MDM2 inhibitor → p53 stabilization); homozygous deletion in ~50% melanoma, ~60% glioblastoma, ~80% PDAC; germline p16 mutations cause FAMMM; CDK4/6 inhibitors exploit p16 loss.

Also known as: CDKN2A, p16, INK4A, ARF, p14ARF, MTS1, CDKN2A deletion, p16 tumor suppressor, CDK4 inhibitor, FAMMM syndrome, ink4a arf locus

Scale 03 — MolecularScale
draftStatus
2026-06-06Last Reviewed
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cdkn2a

CDKN2A

CDKN2A at 9p21 encodes p16/INK4A (CDK4/6 inhibitor → RB1 G1 checkpoint) and p14/ARF (MDM2 inhibitor → p53 stabilization); homozygous deletion in ~50% melanoma, ~60% glioblastoma, ~80% PDAC; germline p16 mutations cause FAMMM; CDK4/6 inhibitors exploit p16 loss.