Is ERCC2 p.Arg88Ter (c.262C>T) pathogenic?

ERCC2 p.Arg88Ter (c.262C>T) is classified Pathogenic/Likely pathogenic in ERCC2 (ClinVar, Multiple submitters, 3 submitters; last evaluated 2023-05-25). Very rare (popmax 0.000594%, nfe); Associated with xeroderma pigmentosum.

What condition is associated with ERCC2 p.Arg88Ter (c.262C>T)?

ERCC2 p.Arg88Ter (c.262C>T) is associated with xeroderma pigmentosum, cerebrooculofacioskeletal syndrome 2 (ClinVar).

How common is ERCC2 p.Arg88Ter (c.262C>T) in the general population?

ERCC2 p.Arg88Ter (c.262C>T) is very rare (popmax 0.000594%, nfe) (gnomAD).

How is Xeroderma pigmentosum inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

ERCC2 p.Arg88Ter

c.262C>T · rs748842373 · VCV2506192

Pathogenic/Likely pathogenic Multiple submitters

Classification

Pathogenic/Likely pathogenic

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

Consequence

nonsense (stop-gain)

predicted LoF

gnomAD v4.1

Rare

very rare (popmax 0.000594%, nfe)

Conditions

xeroderma pigmentosum

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation/SpliceAI carries the signal.
Consequence	nonsense (stop-gain)	predicted loss-of-function
NMD	predicted	premature termination codon in exon 5 of 23
Splicing
SpliceAI	Δ0.24	acceptor loss · deltas
Pangolin	Δ0.40	loss · gain 0.01 · agrees with SpliceAI · independent
Constraint at this position
Conservation	phyloP 8.1	GERP 1.7, phastCons 1
Overall
CADD	45.0	PHRED · no single calibrated threshold — expert panels disagree

Predicted loss-of-function is descriptive, not an applied PVS1 code.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.000594% European (non-Finnish) · 7/1,179,432 alleles

Filtering AF 0.000247% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000159%

Overall 0.000479% 7/1,460,684 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: ERCC2
Protein: p.Arg88Ter
Coding: c.262C>T
MANE Select: NM_000400
dbSNP: rs748842373
Type: single nucleotide variant
Location: chr19:45368728 (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 88: the helicase atp-binding domain; an α-helix

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

Disease context

xeroderma pigmentosum — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: cerebrooculofacioskeletal syndrome 2

For Xeroderma pigmentosum (Orphanet):

Inheritance: Autosomal recessive
Onset: All ages
Prevalence: 1-9 / 1 000 000 (United States)

Similar variants

ERCC2 p.Arg88Gln Uncertain significance ★ ⚠ same residue
ERCC2 p.Arg88= Likely benign ★ same residue
ERCC2 c.1238-1G>C Likely pathogenic ★★ same condition
ERCC2 c.1308-2A>G Likely pathogenic ★★ same condition
ERCC2 c.1378-1G>T Pathogenic/Likely pathogenic ★★ same condition
ERCC2 c.1479+2T>C Pathogenic/Likely pathogenic ★★ same condition
ERCC2 c.1480-1G>C Pathogenic/Likely pathogenic ★★ same condition
ERCC2 c.1480-2A>C Pathogenic/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/ercc2-p-arg88ter (accessed [today's date]).

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