Is EPX p.Arg108Trp (c.322C>T) pathogenic?

EPX p.Arg108Trp (c.322C>T) is classified Uncertain significance in EPX (ClinVar, Single submitter, 1 submitter; last evaluated 2024-09-06). AlphaMissense: likely benign (0.0732); Ultra-rare (popmax 0.0601%, afr).

How common is EPX p.Arg108Trp (c.322C>T) in the general population?

EPX p.Arg108Trp (c.322C>T) is ultra-rare (popmax 0.0601%, afr) (gnomAD).

What do computational predictors say about EPX p.Arg108Trp (c.322C>T)?

AlphaMissense predicts likely benign (score 0.0732) — an in-silico prediction, not a clinical call.

EPX p.Arg108Trp

c.322C>T · VCV3509696

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0732 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0601%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0732	likely benign
REVEL	0.056	moderately benign-leaning
SaProt	LLR -7.50	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · C>A here scores Δ0.84 · evaluated, not missing
Constraint at this position
Conservation	phyloP -0.079	GERP -3.9
Regional constraint	o/e 0.98	unconstrained · MANE · 12 kb · p 0.44 · regional, not allelic
Overall
CADD	16.72	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 0.0601% African / African-American · 45/74,920 alleles

Filtering AF 0.046% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0412%

Overall 0.0044% 71/1,614,026 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0601%	1,665
Admixed American	0.00833%	12,002
European (non-Finnish)	0.00169%	59,001
Remaining individualsnot grpmax-eligible	0.0016%	62,484

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: EPX
Protein: p.Arg108Trp
Coding: c.322C>T
MANE Select: NM_000502
Type: single nucleotide variant
Location: chr17:58193522 (GRCh38)
Gene constraint: LOEUF 0.984 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 92.40 · 1 PDB

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

Similar variants

EPX c.170+5A>G Likely benign ★★ same type
EPX c.464+8C>T Benign ★★ same type
EPX c.801+1G>A Likely benign ★★ same type
EPX p.Asn572Tyr Benign ★★ same type
EPX p.Cys257Ter Benign ★★ same type
EPX p.Leu624= Benign/Likely benign ★★ same type
EPX p.Phe308Leu Likely benign ★★ same type
EPX p.Pro292Leu Benign ★★ 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/epx-p-arg108trp (accessed [today's date]).

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