ACTN1 p.Arg840=
c.2520C>T · rs141539823 · VCV2043439
Benign/Likely benign
Multiple submitters
Classification
Benign/Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 3 submitters
gnomAD v4.1
Rare
rare (popmax 0.133%, afr)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| REVEL | 0.063 | moderately benign-leaning |
|---|---|---|
| Splicing | ||
| SpliceAI | — | not assessed · no allele here is in the release |
| Constraint at this position | ||
| Conservation | phyloP -7.8 | |
| Overall | ||
| CADD | 2.148 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.133%
African / African-American · 100/75,036 alleles
Filtering AF
0.112%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.104%
Overall
0.0216%
349/1,614,164 alleles · rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 0.133% | 750 |
| European (non-Finnish) | 0.0192% | 5,198 |
| Remaining individualsnot grpmax-eligible | 0.0176% | 5,682 |
| Admixed American | 0.0167% | 6,002 |
| South Asian | 0.0011% | 91,078 |
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
- ACTN1
- Protein
- p.Arg840=
- Coding
- c.2520C>T
- MANE Select
- NM_001130004
- dbSNP
- rs141539823
- Type
- single nucleotide variant
- Location
- chr14:68877148 (GRCh38)
- Gene constraint
- LOEUF 0.331 · pLI 1.00 (gnomAD)
- Structure
- AlphaFold pLDDT 85.39 · 4 PDB
Similar variants
- ACTN1 p.Arg840His Uncertain significance ★ same residue
- ACTN1 p.Arg450Cys Pathogenic/Likely pathogenic ★★ same type
- ACTN1 p.Arg46Gln Pathogenic/Likely pathogenic ★★ same type
- ACTN1 p.Arg46Trp Pathogenic/Likely pathogenic ★★ same type
- ACTN1 p.Glu225Lys Pathogenic ★★ same type
- ACTN1 p.Leu547Pro Likely pathogenic ★★ same type
- ACTN1 p.Val105Ile Pathogenic/Likely pathogenic ★★ same type
- ACTN1 p.Ala255Val 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/actn1-p-arg840 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown