Is ERCC4 p.Asn893Asp (c.2677A>G) pathogenic?

ERCC4 p.Asn893Asp (c.2677A>G) is classified Uncertain significance in ERCC4 (ClinVar, Multiple submitters, 8 submitters; last evaluated 2026-02-11). AlphaMissense: likely benign (0.1531); Ultra-rare (popmax 0.0518%, nfe); Associated with xeroderma pigmentosum group F.

What condition is associated with ERCC4 p.Asn893Asp (c.2677A>G)?

ERCC4 p.Asn893Asp (c.2677A>G) is associated with xeroderma pigmentosum group F, Fanconi anemia complementation group Q, Cockayne syndrome (ClinVar).

How common is ERCC4 p.Asn893Asp (c.2677A>G) in the general population?

ERCC4 p.Asn893Asp (c.2677A>G) is ultra-rare (popmax 0.0518%, nfe) (gnomAD).

What do computational predictors say about ERCC4 p.Asn893Asp (c.2677A>G)?

AlphaMissense predicts likely benign (score 0.1531) — an in-silico prediction, not a clinical call.

ERCC4 p.Asn893Asp

Q: How is Xeroderma pigmentosum-Cockayne syndrome complex inherited?

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

c.2677A>G · rs201926295 · VCV579347

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 8 submitters

AlphaMissense

likely benign

0.1531 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0518%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

xeroderma pigmentosum group F

Computational evidence

Protein change
AlphaMissense	0.1531	likely benign
REVEL	0.17	moderately benign-leaning
SaProt	LLR -8.67	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 7	GERP 2.1, phastCons 1
Regional constraint	o/e 1.08	unconstrained · MANE · 28 kb · p 0.011 · regional, not allelic
Overall
CADD	19.33	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 0.0518% European (non-Finnish) · 611/1,180,032 alleles

Filtering AF 0.0484% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.047%

Overall 0.0406% 655/1,613,992 alleles · ultra-rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.0518%	1,931
Remaining individualsnot grpmax-eligible	0.032%	3,125
African / African-American	0.0214%	4,682
Admixed American	0.0133%	7,500

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: ERCC4
Protein: p.Asn893Asp
Coding: c.2677A>G
MANE Select: NM_005236
dbSNP: rs201926295
Type: single nucleotide variant
Location: chr16:13948273 (GRCh38)
Gene constraint: LOEUF 0.984 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 74.60 · 13 PDB
Residue 893: an α-helix; the 'hhh2, dimerization with ercc1' region

Full ERCC4 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

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

Also linked: Fanconi anemia complementation group Q Cockayne syndrome xeroderma pigmentosum

For Xeroderma pigmentosum-Cockayne syndrome complex (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal

Similar variants

ERCC4 c.1102+1G>T Likely pathogenic ★★ same condition
ERCC4 c.793-2A>G Pathogenic ★★ same condition
ERCC4 p.Arg20Ter Pathogenic ★★ same condition
ERCC4 p.Arg589Trp Pathogenic/Likely pathogenic ★★ same condition
ERCC4 p.Arg689Ser Likely pathogenic ★★ same condition
ERCC4 p.Arg772Ter Pathogenic/Likely pathogenic ★★ same condition
ERCC4 p.Cys236Arg Pathogenic/Likely pathogenic ★★ same condition
ERCC4 p.Cys723Ter 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/ercc4-p-asn893asp (accessed [today's date]).

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