Is ERCC3 p.Ala293Thr (c.877G>A) pathogenic?

ERCC3 p.Ala293Thr (c.877G>A) is classified Uncertain significance in ERCC3 (ClinVar, Single submitter, 1 submitter; last evaluated 2021-08-07). AlphaMissense: likely pathogenic (0.7751); Very rare (popmax 0.000508%, nfe).

How common is ERCC3 p.Ala293Thr (c.877G>A) in the general population?

ERCC3 p.Ala293Thr (c.877G>A) is very rare (popmax 0.000508%, nfe) (gnomAD).

What do computational predictors say about ERCC3 p.Ala293Thr (c.877G>A)?

AlphaMissense predicts likely pathogenic (score 0.7751) — an in-silico prediction, not a clinical call.

ERCC3 p.Ala293Thr

c.877G>A · rs142304812 · VCV1358289

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.7751 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.000508%, nfe)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.7751	likely pathogenic
REVEL	0.15	moderately benign-leaning
SaProt	LLR -8.03	tolerated
⇒ AlphaMissense calls this damaging; REVEL and SaProt do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.6	GERP 2, phastCons 1
Regional constraint	o/e 0.84	unconstrained · MANE · 36 kb · p 4.8e-07 · regional, not allelic
Overall
CADD	25.8	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

Grpmax group 0.000508% European (non-Finnish) · 6/1,179,972 alleles

Filtering AF 0.000183% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00012%

Overall 0.000372% 6/1,613,966 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: ERCC3
Protein: p.Ala293Thr
Coding: c.877G>A
MANE Select: NM_000122
dbSNP: rs142304812
Type: single nucleotide variant
Location: chr2:127288810 (GRCh38)
Gene constraint: LOEUF 0.797 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 76.34 · 56 PDB

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-ala293thr (accessed [today's date]).

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