Is ERCC2 p.Pro103Arg (c.308C>G) pathogenic?

ERCC2 p.Pro103Arg (c.308C>G) is classified Uncertain significance in ERCC2 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-06-17). AlphaMissense: likely benign (0.0805); Very rare (popmax 0.00445%, eas).

How common is ERCC2 p.Pro103Arg (c.308C>G) in the general population?

ERCC2 p.Pro103Arg (c.308C>G) is very rare (popmax 0.00445%, eas) (gnomAD).

What do computational predictors say about ERCC2 p.Pro103Arg (c.308C>G)?

AlphaMissense predicts likely benign (score 0.0805) — an in-silico prediction, not a clinical call.

ERCC2 p.Pro103Arg

c.308C>G · rs142462393 · VCV1983554

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0805 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00445%, eas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0805	likely benign
REVEL	0.104	moderately benign-leaning
SaProt	LLR -7.87	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.3	GERP -3.3, phastCons 1
Regional constraint	o/e 0.98	unconstrained · MANE · 17 kb · p 0.48 · regional, not allelic
Overall
CADD	10.87	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00445% East Asian · 2/44,894 alleles

Filtering AF 0.00143% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000891%

Overall 0.000372% 6/1,614,036 alleles · very rare exomes 5/1,461,814 · genomes 1/152,222 · joint denominator

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00445%	22,447
South Asian	0.00439%	22,772

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: ERCC2
Protein: p.Pro103Arg
Coding: c.308C>G
MANE Select: NM_000400
dbSNP: rs142462393
Type: single nucleotide variant
Location: chr19:45368682 (GRCh38)
Gene constraint: LOEUF 1.089 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 87.74 · 55 PDB
Residue 103: the helicase atp-binding domain

Full ERCC2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ERCC2 p.Pro103Leu Uncertain significance ★★ ⚠ same residue
ERCC2 p.Pro103= Likely benign ★★ same residue
MAG p.Leu103Gln Uncertain significance ★ ⚠ same residue
ERCC2 c.1238-1G>C Likely pathogenic ★★ same type
ERCC2 c.1308-2A>G Likely pathogenic ★★ same type
ERCC2 c.1378-1G>T Pathogenic/Likely pathogenic ★★ same type
ERCC2 c.1479+2T>C Pathogenic/Likely pathogenic ★★ same type
ERCC2 c.1480-1G>C 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/ercc2-p-pro103arg (accessed [today's date]).

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