Is CDKN2A p.Val115Leu (c.343G>C) pathogenic?

CDKN2A p.Val115Leu (c.343G>C) is classified Uncertain significance in CDKN2A (ClinVar, Multiple submitters, 2 submitters; last evaluated 2023-09-21). AlphaMissense: likely benign (0.2356); Absent from gnomAD v4.1; Associated with melanoma and neural system tumor syndrome.

What condition is associated with CDKN2A p.Val115Leu (c.343G>C)?

CDKN2A p.Val115Leu (c.343G>C) is associated with melanoma and neural system tumor syndrome, familial melanoma (ClinVar).

How common is CDKN2A p.Val115Leu (c.343G>C) in the general population?

CDKN2A p.Val115Leu (c.343G>C) is absent from gnomAD v4.1 (gnomAD).

How is Melanoma and neural system tumor syndrome inherited?

Typically Autosomal dominant, Unknown (Orphanet). A genetic counselor can assess individual risk for a family.

What do computational predictors say about CDKN2A p.Val115Leu (c.343G>C)?

AlphaMissense predicts likely benign (score 0.2356) — an in-silico prediction, not a clinical call.

CDKN2A p.Val115Leu

c.343G>C · rs779913365 · VCV2013862

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.2356 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

melanoma and neural system tumor syndrome

Computational evidence

Protein change
AlphaMissense	0.2356	likely benign
REVEL	0.35	indeterminate
SaProt	LLR -7.34	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 1.1	GERP 2, phastCons 0.66
Regional constraint	o/e 1.13	unconstrained · MANE · 6,595 bp · p 0.04 · regional, not allelic
Overall
CADD	17.5	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: CDKN2A
Protein: p.Val115Leu
Coding: c.343G>C
MANE Select: NM_000077
dbSNP: rs779913365
Type: single nucleotide variant
Location: chr9:21971016 (GRCh38)
Gene constraint: LOEUF 0.791 · pLI 0.62 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 77.02 · 5 PDB
Residue 115: an α-helix; the 'disordered' region

Full CDKN2A gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

melanoma and neural system tumor syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: familial melanoma

For Melanoma and neural system tumor syndrome (Orphanet):

Inheritance: Autosomal dominant, Unknown
Onset: Adult, Elderly

Similar variants

CDKN2A p.Val115Glu Uncertain significance ★★ ⚠ same residue
CDKN2A p.Val115Gly Uncertain significance ★★ ⚠ same residue
CDKN2A p.Val115Met Uncertain significance ★★ ⚠ same residue
CDKN2A p.Val115= Conflicting classifications of pathogenicity ★ same residue
CDKN2A c.150+1G>A Likely pathogenic ★★ same condition
CDKN2A c.151-1G>A Pathogenic ★★ same condition
CDKN2A c.151-1G>C Pathogenic ★★ same condition
CDKN2A c.151-2A>G Pathogenic/Likely pathogenic ★★ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/cdkn2a-p-val115leu (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown