Is MITF p.Gln222= (c.666G>A) pathogenic?

MITF p.Gln222= (c.666G>A) is classified Uncertain significance in MITF (ClinVar, Single submitter, 1 submitter; last evaluated 2025-01-21). Absent from gnomAD v4.1; Associated with melanoma, cutaneous malignant, susceptibility to, 8.

What condition is associated with MITF p.Gln222= (c.666G>A)?

MITF p.Gln222= (c.666G>A) is associated with melanoma, cutaneous malignant, susceptibility to, 8, Tietz syndrome, Waardenburg syndrome type 2A (ClinVar).

How common is MITF p.Gln222= (c.666G>A) in the general population?

MITF p.Gln222= (c.666G>A) is absent from gnomAD v4.1 (gnomAD).

MITF p.Gln222=

c.666G>A · VCV3758012

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

melanoma, cutaneous malignant, susceptibility to, 8

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation/SpliceAI carries the signal.
Splicing
SpliceAI	Δ0.90	donor loss · deltas
Pangolin	Δ0.76	loss · gain 0.02 · agrees with SpliceAI · independent
Constraint at this position
Conservation	phyloP 12	GERP 2, phastCons 1
Overall
CADD	22.5	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: MITF
Protein: p.Gln222=
Coding: c.666G>A
MANE Select: NM_001354604
Type: single nucleotide variant
Location: chr3:69939181 (GRCh38)
Gene constraint: LOEUF 0.482 · pLI 0.99 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 62.25 · 12 PDB

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

Disease context

melanoma, cutaneous malignant, susceptibility to, 8 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Tietz syndrome Waardenburg syndrome type 2A

For MITF-related melanoma and renal cell carcinoma predisposition syndrome (Orphanet):

Onset: Adult, Elderly

Similar variants

MITF c.1031+1G>A Pathogenic ★★ same condition
MITF c.1179+1G>A Pathogenic ★★ same condition
MITF c.355-1062G>C Pathogenic/Likely pathogenic ★★ same condition
MITF c.880+1G>A Likely pathogenic ★★ same condition
MITF c.955+1G>A Likely pathogenic ★★ same condition
MITF c.956-1G>A Pathogenic ★★ same condition
MITF p.Arg217Ter Pathogenic/Likely pathogenic ★★ same condition
MITF p.Arg310Gly 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/mitf-p-gln222 (accessed [today's date]).

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