OnCo

CDKN1B (Cyclin-dependent kinase inhibitor 1B) is a gene whose normal job is to hold cell growth in check. The public catalogues list it as a drug target, an oncogene driver, a tumour suppressor and a biomarker, and clinical evidence ties its variants to diagnosis, prognosis or drug response. Tied to Thyroid cancer, Prostate cancer, Breast cancer and 5 more. This dossier gathers the 0 products (0 approved), 0 trials, 0 pathways and 0 resistance routes in the corpus that involve it, with external identifiers so it can be joined to UniProt, ChEMBL, Open Targets and the rest of biology.

Biology

Important regulator of cell cycle progression. Inhibits the kinase activity of CDK2 bound to cyclin A, but has little inhibitory activity on CDK2 bound to SPDYA. Involved in G1 arrest. Potent inhibitor of cyclin E- and cyclin A-CDK2 complexes. Forms a complex with cyclin type D-CDK4 complexes and is involved in the assembly, stability, and modulation of CCND1-CDK4 complex activation. Acts either as an inhibitor or an activator of cyclin type D-CDK4 complexes depending on its phosphorylation state and/or stoichiometry. Location: Nucleus; Cytoplasm; Endosome (UniProt). Locus 12p13.1 (HGNC).

Where it is found
  • Thyroid cancer: Open Targets association 0.65 with thyroid cancer (MONDO_0002108)
  • Prostate cancer: Open Targets association 0.63 with prostate cancer (MONDO_0008315); IntOGen driver in 4 cohorts (PRAD)
  • Breast cancer: Open Targets association 0.63 with breast cancer (MONDO_0007254); CIViC evidence names this disease
  • Neuroendocrine tumours: Open Targets association 0.62 with neuroendocrine neoplasm (MONDO_0019496)
  • Head and neck squamous cell carcinoma: CIViC evidence names this disease
  • Multiple myeloma: IntOGen driver in 2 cohorts (PCM)
Class: tumor suppressor · Gene: CDKN1B · Facts checked 2026-09-23 · Target page

External identifiers

Built from HGNC, Ensembl, UniProt and ChEMBL ids

Products by modality and phase

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Resistance routes

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No pathway diagram carries this target as a node.

Companion diagnostics

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Preclinical models

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Literature

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Query for this target: (TITLE:"CDKN1B" OR ABSTRACT:"CDKN1B" OR TITLE:"cyclin dependent kinase inhibitor 1B" OR ABSTRACT:"cyclin dependent kinase inhibitor 1B" OR TITLE:"Cyclin-dependent kinase inhibitor 1B" OR ABSTRACT:"Cyclin-dependent kinase inhibitor 1B" OR TITLE:"KIP1" OR ABSTRACT:"KIP1" OR TITLE:"P27KIP1" OR ABSTRACT:"P27KIP1") AND (cancer OR tumor OR tumour OR oncology OR carcinoma OR lymphoma OR leukemia OR leukaemia OR myeloma OR sarcoma OR melanoma OR glioma). Results are unfiltered search hits about CDKN1B, not a curated reading list.

Export

The dossier as machine-readable JSON: identifiers from HGNC, Ensembl, UniProt and ChEMBL, products with status, trials, pathways, hotspots, open questions and assays. The full entity record is in the open API at /api/v1/entities/cdkn1b.json. Licence CC BY-NC 4.0.