Is EPHX2 p.Cys309Phe (c.926G>T) pathogenic?

EPHX2 p.Cys309Phe (c.926G>T) is classified Uncertain significance in EPHX2 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-12-15). AlphaMissense: likely benign (0.2635); Very rare (popmax 0.00179%, amr).

How common is EPHX2 p.Cys309Phe (c.926G>T) in the general population?

EPHX2 p.Cys309Phe (c.926G>T) is very rare (popmax 0.00179%, amr) (gnomAD).

What do computational predictors say about EPHX2 p.Cys309Phe (c.926G>T)?

AlphaMissense predicts likely benign (score 0.2635) — an in-silico prediction, not a clinical call.

EPHX2 p.Cys309Phe

c.926G>T · rs1220811349 · VCV2279755

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2635 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00179%, amr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.2635	likely benign
REVEL	0.111	moderately benign-leaning
SaProt	LLR -8.39	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	GERP 0.72, phastCons 1
Regional constraint	o/e 1.02	unconstrained · MANE · 53 kb · p 0.64 · regional, not allelic
Overall
CADD	23.3	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 0.00179% Admixed American · 1/55,996 alleles

Overall 6.26e-05% 1/1,597,784 alleles · very rare exomes 1/1,445,556 · genomes 0/152,228 · joint denominator

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: EPHX2
Protein: p.Cys309Phe
Coding: c.926G>T
MANE Select: NM_001979
dbSNP: rs1220811349
Type: single nucleotide variant
Location: chr8:27518053 (GRCh38)
Gene constraint: LOEUF 1.093 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 93.54 · 141 PDB
Residue 309: the ab hydrolase-1 domain; the 'epoxide hydrolase' region

Full EPHX2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

EPHX2 p.Arg403Trp Uncertain significance ★★ ⚠ same type
EPHX2 p.Arg52Gln Benign/Likely benign ★★ same type
EPHX2 p.Gly21= Benign/Likely benign ★★ same type
EPHX2 p.Ala175Asp Uncertain significance ★ ⚠ same type
EPHX2 p.Ala18Val Uncertain significance ★ ⚠ same type
EPHX2 p.Ala260Ser Uncertain significance ★ ⚠ same type
EPHX2 p.Ala354Val Uncertain significance ★ ⚠ same type
EPHX2 p.Ala425Val Uncertain significance ★ ⚠ 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/ephx2-p-cys309phe (accessed [today's date]).

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