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Gene CDKN2A
Variant D125fs
Impact List frameshift
Protein Effect unknown
Gene Variant Descriptions CDKN2A D125fs results in a change in the amino acid sequence of the Cdkn2a protein beginning at aa 125 of 156, likely resulting in premature truncation of the functional protein (UniProt.org). D125fs has been identified in sequencing studies (PMID: 27882345, PMID: 23525077, PMID: 8637233), but has not been biochemically characterized and therefore, its effect on Cdkn2a protein function is unknown (PubMed, Jun 2023).
Associated Drug Resistance
Category Variants Paths

CDKN2A mutant CDKN2A D125fs

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Transcript NM_000077.5
gDNA chr9:g.(21970986_21970987)
cDNA c.(373_372)
Protein p.D125fs
Source Database RefSeq
Genome Build GRCh38/hg38
Transcript gDNA cDNA Protein Source Database Genome Build
NM_001195132 chr9:g.(21970986_21970987) c.(373_372) p.D125fs RefSeq GRCh38/hg38
XM_011517676 chr9:g.(21970986_21970987) c.(373_372) p.D125fs RefSeq GRCh38/hg38
XM_011517675.3 chr9:g.(21970986_21970987) c.(373_372) p.D125fs RefSeq GRCh38/hg38
XM_011517676.2 chr9:g.(21970986_21970987) c.(373_372) p.D125fs RefSeq GRCh38/hg38
NM_001195132.1 chr9:g.(21970986_21970987) c.(373_372) p.D125fs RefSeq GRCh38/hg38
XM_011517675.2 chr9:g.(21970986_21970987) c.(373_372) p.D125fs RefSeq GRCh38/hg38
NM_000077.5 chr9:g.(21970986_21970987) c.(373_372) p.D125fs RefSeq GRCh38/hg38
NM_001195132.2 chr9:g.(21970986_21970987) c.(373_372) p.D125fs RefSeq GRCh38/hg38
XM_011517675 chr9:g.(21970986_21970987) c.(373_372) p.D125fs RefSeq GRCh38/hg38
NM_000077 chr9:g.(21970986_21970987) c.(373_372) p.D125fs RefSeq GRCh38/hg38
NM_000077.4 chr9:g.(21970986_21970987) c.(373_372) p.D125fs RefSeq GRCh38/hg38
XM_011517676.3 chr9:g.(21970986_21970987) c.(373_372) p.D125fs RefSeq GRCh38/hg38

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Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
CDKN2A mutant lung non-small cell carcinoma predicted - sensitive Palbociclib Phase II Actionable In a Phase II trial (TAPUR), Ibrance (palbociclib) treatment resulted in a disease control rate of 29% (7/28, 1 partial response, 6 stable disease at 16 weeks) in patients with non-small cell lung cancer harboring CDKN2A loss or mutations, with a median progression-free survival of 9.7 weeks and a median overall survival of 20.6 months (J Clin Oncol 37, 2019 (suppl; abstr 9041); NCT02693535). detail...
CDKN2A mutant biliary tract cancer no benefit Palbociclib Phase II Actionable In a Phase II trial (TAPUR), patients with biliary cancer harboring a CDKN2A mutation or loss of CDKN2A (n=10) did not demonstrate an objective response or stable disease at 16 weeks when treated with single therapy, Ibrance (palbociclib), demonstrating a median progression-free survival of 7.3 weeks and an overall survival of 11.1 weeks (JCO Precision Oncology, Aug 14, 2019; NCT02693535). detail...
CDKN2A mutant pancreatic cancer not applicable N/A Guideline Risk Factor Germline mutations in CDKN2A results in familial malignant melanoma syndrome, which is associated with increased risk of developing pancreatic cancer (NCCN.org). detail...
CDKN2A mutant pancreatic cancer no benefit Palbociclib Phase II Actionable In a Phase II trial (TAPUR), patients with pancreatic cancer harboring a CDKN2A mutation or loss of CDKN2A (n=10) did not demonstrate an objective response or stable disease at 16 weeks when treated with single therapy, Ibrance (palbociclib), demonstrating a median progression-free survival of 7.2 weeks and an overall survival of 12.4 weeks (JCO Precision Oncology, Aug 14, 2019; NCT02693535). detail...
CDKN2A mutant skin melanoma not applicable N/A Guideline Risk Factor Germline CDKN2A mutations or polymorphisms are associated with increased risk of developing single or multiple primary cutaneous melanomas (NCCN.org). detail...