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Gene CDKN2A
Variant E27del
Impact List deletion
Protein Effect unknown
Gene Variant Descriptions CDKN2A E27del results in the deletion of an amino acid in ANK repeat 1 of the Cdkn2a protein at amino acid 27 (UniProt.org). E27del has been identified in sequencing studies (PMID: 33635883), but has not been biochemically characterized and therefore, its effect on Cdkn2a protein function is unknown (PubMed, May 2024).
Associated Drug Resistance
Category Variants Paths

CDKN2A mutant CDKN2A E27del

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Transcript NM_000077.5
gDNA chr9:g.21974750_21974752delCTC
cDNA c.80_82delAGG
Protein p.E27delE
Source Database RefSeq
Genome Build GRCh38/hg38
Transcript gDNA cDNA Protein Source Database Genome Build
XM_047422597.1 chr9:g.21971125_21971127delGAG c.79_81delCTC p.L27delL RefSeq GRCh38/hg38
XM_011517675.3 chr9:g.21974750_21974752delCTC c.80_82delAGG p.E27delE RefSeq GRCh38/hg38
NM_058197.5 chr9:g.21974750_21974752delCTC c.80_82delAGG p.E27delE RefSeq GRCh38/hg38
NM_001195132.2 chr9:g.21974750_21974752delCTC c.80_82delAGG p.E27delE RefSeq GRCh38/hg38
XM_011517676.3 chr9:g.21974750_21974752delCTC c.80_82delAGG p.E27delE RefSeq GRCh38/hg38
XM_011517676.2 chr9:g.21974750_21974752delCTC c.80_82delAGG p.E27delE RefSeq GRCh38/hg38
NM_058195.4 chr9:g.21994252_21994254delATG c.79_81delATC p.I27delI RefSeq GRCh38/hg38
NM_000077.5 chr9:g.21974750_21974752delCTC c.80_82delAGG p.E27delE RefSeq GRCh38/hg38
NM_001363763.2 chr9:g.21971125_21971127delGAG c.79_81delCTC p.L27delL RefSeq GRCh38/hg38
XM_047422598.1 chr9:g.21971125_21971127delGAG c.79_81delCTC p.L27delL RefSeq GRCh38/hg38
XM_047422596.1 chr9:g.21971125_21971127delGAG c.79_81delCTC p.L27delL RefSeq GRCh38/hg38
NM_000077.4 chr9:g.21974750_21974752delCTC c.80_82delAGG p.E27del RefSeq GRCh38/hg38
NM_058197.4 chr9:g.21974750_21974752delCTC c.80_82delAGG p.E27delE RefSeq GRCh38/hg38
XM_011517675.2 chr9:g.21974750_21974752delCTC c.80_82delAGG p.E27delE RefSeq GRCh38/hg38
NM_001195132.1 chr9:g.21974750_21974752delCTC c.80_82delAGG p.E27delE 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 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...
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...