Is CDK4 p.Ile136= (c.408C>T) pathogenic?

CDK4 p.Ile136= (c.408C>T) is classified Benign/Likely benign in CDK4 (ClinVar, Multiple submitters, 3 submitters; last evaluated 2024-09-25). Very rare (popmax 8.47e-05%, nfe); Associated with melanoma, cutaneous malignant, susceptibility to, 3.

What condition is associated with CDK4 p.Ile136= (c.408C>T)?

CDK4 p.Ile136= (c.408C>T) is associated with melanoma, cutaneous malignant, susceptibility to, 3, hereditary neoplastic syndrome, familial melanoma (ClinVar).

How common is CDK4 p.Ile136= (c.408C>T) in the general population?

CDK4 p.Ile136= (c.408C>T) is very rare (popmax 8.47e-05%, nfe) (gnomAD).

CDK4 p.Ile136=

c.408C>T · rs758331285 · VCV231687

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

gnomAD v4.1

Rare

very rare (popmax 8.47e-05%, nfe)

Conditions

melanoma, cutaneous malignant, susceptibility to, 3

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 · G>T here scores Δ0.48 · evaluated, not missing
Constraint at this position
Conservation	phyloP -0.86	GERP -3.8
Overall
CADD	7.42	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 8.47e-05% European (non-Finnish) · 1/1,180,028 alleles

Overall 6.84e-05% 1/1,461,892 alleles · very rare

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: CDK4
Protein: p.Ile136=
Coding: c.408C>T
MANE Select: NM_000075
dbSNP: rs758331285
Type: single nucleotide variant
Location: chr12:57751037 (GRCh38)
Gene constraint: LOEUF 0.61 · pLI 0.57 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 87.56 · 15 PDB
Residue 136: the protein kinase domain

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

Disease context

melanoma, cutaneous malignant, susceptibility to, 3 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: hereditary neoplastic syndrome familial melanoma

Similar variants

CDK4 p.Ile136Met Uncertain significance ★ ⚠ same residue
CDK4 p.Ile136Val 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-ile136 (accessed [today's date]).

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