ACVR1 p.Ala406=
c.1218C>T · VCV3637517
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00167%, amr)
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 5.9 | GERP 0.41, phastCons 1 |
| Overall | ||
| CADD | 13.24 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00167%
Admixed American · 1/59,990 alleles
Filtering AF
0.000183%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00012%
Overall
0.000558%
9/1,613,960 alleles · very rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Admixed Americangrpmax | 0.00167% | 59,990 |
| Finnishnot grpmax-eligible | 0.00156% | 64,020 |
| South Asian | 0.0011% | 91,086 |
| European (non-Finnish) | 0.000508% | 196,667 |
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
- ACVR1
- Protein
- p.Ala406=
- Coding
- c.1218C>T
- MANE Select
- NM_001111067
- Type
- single nucleotide variant
- Location
- chr2:157760926 (GRCh38)
- Gene constraint
- LOEUF 0.835 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 83.70 · 85 PDB
- Residue 406
- the protein kinase domain; an α-helix
Similar variants
- ACVR1 p.Ala406Thr Uncertain significance ★ ⚠ same residue
- ACVR1 p.Arg206His Pathogenic ★★ same type
- ACVR1 p.Gly328Glu Pathogenic/Likely pathogenic ★★ same type
- ACVR1 p.Gly356Asp Pathogenic/Likely pathogenic ★★ same type
- ACVR1 p.Ala134Thr Uncertain significance ★★ ⚠ same type
- ACVR1 p.Arg147Gln Uncertain significance ★★ ⚠ same type
- ACVR1 p.Arg160Ter Uncertain significance ★★ same type
- ACVR1 p.Arg307Gln 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/acvr1-p-ala406 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown