Is ERCC3 p.Met494Val (c.1480A>G) pathogenic?

ERCC3 p.Met494Val (c.1480A>G) is classified Uncertain significance in ERCC3 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-08-12). AlphaMissense: ambiguous (0.4747); Absent from gnomAD v4.1.

How common is ERCC3 p.Met494Val (c.1480A>G) in the general population?

ERCC3 p.Met494Val (c.1480A>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about ERCC3 p.Met494Val (c.1480A>G)?

AlphaMissense predicts ambiguous (score 0.4747) — an in-silico prediction, not a clinical call.

ERCC3 p.Met494Val

c.1480A>G · VCV3662134

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.4747 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Computational evidence

Protein change
AlphaMissense	0.4747	ambiguous
REVEL	0.636	indeterminate
SaProt	LLR -9.35	tolerated
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.8	GERP 2.2, phastCons 1
Regional constraint	o/e 0.84	unconstrained · MANE · 36 kb · p 4.8e-07 · regional, not allelic
Overall
CADD	24.2	PHRED · no single calibrated threshold — expert panels disagree

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: ERCC3
Protein: p.Met494Val
Coding: c.1480A>G
MANE Select: NM_000122
Type: single nucleotide variant
Location: chr2:127280494 (GRCh38)
Gene constraint: LOEUF 0.797 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 76.34 · 56 PDB
Residue 494: an α-helix

Full ERCC3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ERCC3 c.1828-1G>C Likely pathogenic ★★ same type
ERCC3 c.471+1G>A Pathogenic ★★ same type
ERCC3 c.657+1G>A Likely pathogenic ★★ same type
ERCC3 p.Arg109Ter Pathogenic/Likely pathogenic ★★ same type
ERCC3 p.Arg195Ter Pathogenic ★★ same type
ERCC3 p.Arg234Ter Pathogenic/Likely pathogenic ★★ same type
ERCC3 p.Arg425Ter Pathogenic ★★ same type
ERCC3 p.Arg452Ter Pathogenic/Likely pathogenic ★★ same type

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/ercc3-p-met494val (accessed [today's date]).

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