Is ACTA1 p.Glu336Asp (c.1008G>C) pathogenic?

ACTA1 p.Glu336Asp (c.1008G>C) is classified Likely pathogenic in ACTA1 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-06-02). AlphaMissense: likely pathogenic (0.9855); Absent from gnomAD v4.1; Associated with ACTA1-related disorder.

What condition is associated with ACTA1 p.Glu336Asp (c.1008G>C)?

ACTA1 p.Glu336Asp (c.1008G>C) is associated with ACTA1-related disorder (ClinVar).

How common is ACTA1 p.Glu336Asp (c.1008G>C) in the general population?

ACTA1 p.Glu336Asp (c.1008G>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about ACTA1 p.Glu336Asp (c.1008G>C)?

AlphaMissense predicts likely pathogenic (score 0.9855) — an in-silico prediction, not a clinical call.

ACTA1 p.Glu336Asp

c.1008G>C · rs1180279387 · VCV2633560

Likely pathogenic Single submitter

Classification

Likely pathogenic

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9855 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

ACTA1-related disorder

Computational evidence

Protein change
AlphaMissense	0.9855	likely pathogenic ✓ concordant with ClinVar
REVEL	0.651	pathogenic-leaning
SaProt	LLR -11.48	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 2.7	GERP 1.7, phastCons 1
Regional constraint	o/e 0.33	constrained · MANE · 1,613 bp · p 1.6e-54 · regional, not allelic
Overall
CADD	23.5	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: ACTA1
Protein: p.Glu336Asp
Coding: c.1008G>C
MANE Select: NM_001100
dbSNP: rs1180279387
Type: single nucleotide variant
Location: chr1:229431625 (GRCh38)
Gene constraint: LOEUF 0.931 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 95.21 · 5 PDB
Residue 336: a UniProt-annotated variant site (in cmyo2a)

Full ACTA1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

ACTA1-related disorder

Similar variants

ACTA1 p.Glu336Ala Likely pathogenic ★★★ same residue
ACTA1 p.Glu336= Likely benign ★ same residue
ACTA1 p.Glu228Gln Pathogenic/Likely pathogenic ★★ same condition
ACTA1 p.Glu6Lys Pathogenic/Likely pathogenic ★★ same condition
ACTA1 p.Gly270Asp Pathogenic/Likely pathogenic ★★ same condition
ACTA1 p.Gly76Asp Pathogenic ★★ same condition
ACTA1 p.Leu96Pro Pathogenic/Likely pathogenic ★★ same condition
ACTA1 p.Ser235Tyr 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/acta1-p-glu336asp (accessed [today's date]).

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