Is ACTN2 p.Pro566= (c.1698C>T) pathogenic?

ACTN2 p.Pro566= (c.1698C>T) is classified Likely benign in ACTN2 (ClinVar, Multiple submitters, 4 submitters; last evaluated 2025-11-21). Very rare (popmax 0.00891%, eas); Associated with dilated cardiomyopathy 1AA.

What condition is associated with ACTN2 p.Pro566= (c.1698C>T)?

ACTN2 p.Pro566= (c.1698C>T) is associated with dilated cardiomyopathy 1AA, familial hypertrophic cardiomyopathy (ClinVar).

How common is ACTN2 p.Pro566= (c.1698C>T) in the general population?

ACTN2 p.Pro566= (c.1698C>T) is very rare (popmax 0.00891%, eas) (gnomAD).

ACTN2 p.Pro566=

c.1698C>T · rs148961019 · VCV385343

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00891%, eas)

Conditions

dilated cardiomyopathy 1AA

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -20	GERP -4.8
Overall
CADD	0.05	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00891% East Asian · 4/44,886 alleles

Filtering AF 0.00298% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0018%

Overall 0.00136% 22/1,614,104 alleles · very rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00891%	11,222
African / African-American	0.00666%	15,006
Admixed American	0.00167%	60,018
South Asian	0.0011%	91,080
European (non-Finnish)	0.000932%	107,273

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: ACTN2
Protein: p.Pro566=
Coding: c.1698C>T
MANE Select: NM_001103
dbSNP: rs148961019
Type: single nucleotide variant
Location: chr1:236751511 (GRCh38)
Gene constraint: LOEUF 0.432 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 84.88 · 18 PDB
Residue 566: an α-helix

Full ACTN2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

dilated cardiomyopathy 1AA — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: familial hypertrophic cardiomyopathy

Similar variants

ACTN2 p.Ala119Thr Pathogenic/Likely pathogenic ★★ same condition
ACTN2 p.Thr247Met Likely pathogenic ★★ same condition
ACTN2 c.1107+3G>A Uncertain significance ★★ same condition
ACTN2 c.1108-10A>G Uncertain significance ★★ same condition
ACTN2 c.1255+1G>C Uncertain significance ★★ same condition
ACTN2 c.126+2T>G Uncertain significance ★★ same condition
ACTN2 c.127-3C>A Uncertain significance ★★ same condition
ACTN2 c.1974+4A>G 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/actn2-p-pro566 (accessed [today's date]).

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