Is ACTC1 p.Tyr135= (c.405C>T) pathogenic?

ACTC1 p.Tyr135= (c.405C>T) is classified Likely benign in ACTC1 (ClinVar, Multiple submitters, 5 submitters; last evaluated 2026-06-09). Very rare (popmax 0.00533%, afr); Associated with hypertrophic cardiomyopathy.

What condition is associated with ACTC1 p.Tyr135= (c.405C>T)?

ACTC1 p.Tyr135= (c.405C>T) is associated with hypertrophic cardiomyopathy, cardiomyopathy, hypertrophic cardiomyopathy 11 (ClinVar).

How common is ACTC1 p.Tyr135= (c.405C>T) in the general population?

ACTC1 p.Tyr135= (c.405C>T) is very rare (popmax 0.00533%, afr) (gnomAD).

ACTC1 p.Tyr135=

c.405C>T · rs181479041 · VCV416055

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00533%, afr)

Conditions

hypertrophic cardiomyopathy

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · G>T here scores Δ0.81 · evaluated, not missing
Constraint at this position
Conservation	phyloP -0.18	GERP -4.7, phastCons 0.002
Overall
CADD	10.49	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00533% African / African-American · 4/75,042 alleles

Filtering AF 0.00174% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00104%

Overall 0.00155% 25/1,614,164 alleles · very rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00533%	18,760
South Asian	0.0022%	45,536
Admixed American	0.00167%	60,026
European (non-Finnish)	0.00153%	65,556

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: ACTC1
Protein: p.Tyr135=
Coding: c.405C>T
MANE Select: NM_005159
dbSNP: rs181479041
Type: single nucleotide variant
Location: chr15:34793294 (GRCh38)
Gene constraint: LOEUF 0.511 · pLI 0.97 · ClinGen HI 1/3 (gnomAD)
Structure: AlphaFold pLDDT 95.47 · 16 PDB
Residue 135: a β-strand

Full ACTC1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

hypertrophic cardiomyopathy — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: cardiomyopathy hypertrophic cardiomyopathy 11 atrial septal defect 5 dilated cardiomyopathy 1R

Similar variants

ACTC1 p.Glu101Lys Pathogenic ★★★ same condition
ACTC1 p.Gly345Val Uncertain significance ★★★ ⚠ same condition
ACTC1 p.Pro266Leu Uncertain significance ★★★ ⚠ same condition
ACTC1 p.Val56Ile Uncertain significance ★★★ ⚠ same condition
ACTC1 p.Ala297Ser Pathogenic ★★ ⚠ same condition
ACTC1 p.Gly247Asp Pathogenic/Likely pathogenic ★★ same condition
ACTC1 p.Thr128Ile Likely pathogenic ★★ same condition
ACTC1 c.455-6G>A 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/actc1-p-tyr135 (accessed [today's date]).

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