Is CDK4 p.Gln123= (c.369G>A) pathogenic?

CDK4 p.Gln123= (c.369G>A) is classified Conflicting classifications of pathogenicity in CDK4 (ClinVar, Conflicting submitters, 3 submitters; last evaluated 2024-03-01). Absent from gnomAD v4.1; Associated with familial melanoma.

What condition is associated with CDK4 p.Gln123= (c.369G>A)?

CDK4 p.Gln123= (c.369G>A) is associated with familial melanoma, hereditary neoplastic syndrome (ClinVar).

How common is CDK4 p.Gln123= (c.369G>A) in the general population?

CDK4 p.Gln123= (c.369G>A) is absent from gnomAD v4.1 (gnomAD).

How is Familial melanoma inherited?

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

CDK4 p.Gln123=

c.369G>A · rs1955231243 · VCV1593359

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 3 submitters

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

familial melanoma

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · C>A here scores Δ0.48 · evaluated, not missing
Constraint at this position
Conservation	phyloP 0.22	GERP 0.95, phastCons 0.97
Overall
CADD	11.36	PHRED · no single calibrated threshold — expert panels disagree

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: CDK4
Protein: p.Gln123=
Coding: c.369G>A
MANE Select: NM_000075
dbSNP: rs1955231243
Type: single nucleotide variant
Location: chr12:57751076 (GRCh38)
Gene constraint: LOEUF 0.61 · pLI 0.57 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 87.56 · 15 PDB
Residue 123: the protein kinase domain; an α-helix

Full CDK4 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

familial melanoma — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: hereditary neoplastic syndrome

For Familial melanoma (Orphanet):

Inheritance: Autosomal dominant, Multigenic/multifactorial
Onset: Adult
Prevalence: 1-9 / 100 000 (Europe)

Similar variants

CDK4 p.Gln123His Uncertain significance ★★ ⚠ same residue
CDK4 p.Gln123Ter Uncertain significance ★ same residue
CDK4 p.Arg24Cys Pathogenic ★★ same condition
CDK4 p.Arg24His Pathogenic ★★ same condition
CDK4 c.354+3G>C Uncertain significance ★★ same condition
CDK4 c.354+5G>T Uncertain significance ★★ same condition
CDK4 c.355-4C>G Uncertain significance ★★ same condition
CDK4 c.632+5G>A Uncertain significance ★★ 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/cdk4-p-gln123 (accessed [today's date]).

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