Is RBFOX3 p.Ala327= (c.981G>A) pathogenic?

RBFOX3 p.Ala327= (c.981G>A) is classified Likely benign in RBFOX3 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-10-28). Very rare (popmax 0.00548%, afr); Associated with idiopathic generalized epilepsy.

What condition is associated with RBFOX3 p.Ala327= (c.981G>A)?

RBFOX3 p.Ala327= (c.981G>A) is associated with idiopathic generalized epilepsy (ClinVar).

How common is RBFOX3 p.Ala327= (c.981G>A) in the general population?

RBFOX3 p.Ala327= (c.981G>A) is very rare (popmax 0.00548%, afr) (gnomAD).

RBFOX3 p.Ala327=

c.981G>A · rs754425963 · VCV1137935

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00548%, afr)

Conditions

idiopathic generalized epilepsy

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP -20	GERP -4.1
Overall
CADD	0.073	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00548% African / African-American · 4/73,052 alleles

Filtering AF 0.00308% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00275%

Overall 0.00348% 54/1,551,136 alleles · very rare exomes 47/1,398,902 · genomes 7/152,234 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00548%	18,263
Remaining individualsnot grpmax-eligible	0.00499%	20,028
European (non-Finnish)	0.00401%	24,928
South Asian	0.00119%	84,000

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: RBFOX3
Protein: p.Ala327=
Coding: c.981G>A
MANE Select: NM_001350451
dbSNP: rs754425963
Type: single nucleotide variant
Location: chr17:79095530 (GRCh38)
Gene constraint: LOEUF 0.605 · pLI 0.60 (gnomAD)
Structure: AlphaFold pLDDT 62.27

Full RBFOX3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

idiopathic generalized epilepsy — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

RBFOX3 p.Ala327Val Uncertain significance ★ ⚠ same residue
RBFOX3 p.Ala316Thr Uncertain significance ★★ ⚠ same condition
RBFOX3 p.Ala62Val Uncertain significance ★★ ⚠ same condition
RBFOX3 p.Ala68Thr Uncertain significance ★★ ⚠ same condition
RBFOX3 p.Ala79Val Uncertain significance ★★ ⚠ same condition
RBFOX3 p.Ala8Thr Uncertain significance ★★ ⚠ same condition
RBFOX3 p.Arg230Trp Uncertain significance ★★ ⚠ same condition
RBFOX3 p.Gln31Arg Uncertain significance ★★ ⚠ 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/rbfox3-p-ala327 (accessed [today's date]).

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