HDAC4 p.Ala409=
c.1227G>A · rs768442788 · VCV1586751
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
very rare (popmax 0.00659%, sas)
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 -9.6 | GERP -3.9 |
| Overall | ||
| CADD | 1.306 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00659%
South Asian · 6/91,078 alleles
Filtering AF
0.00326%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00294%
Overall
0.0039%
63/1,613,586 alleles · very rare
exomes 58/1,461,384 · genomes 5/152,202 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| South Asiangrpmax | 0.00659% | 15,180 |
| East Asian | 0.00445% | 22,448 |
| European (non-Finnish) | 0.00424% | 23,600 |
| Admixed American | 0.00333% | 30,000 |
| Remaining individualsnot grpmax-eligible | 0.0032% | 31,242 |
| African / African-American | 0.00133% | 74,924 |
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
- HDAC4
- Protein
- p.Ala409=
- Coding
- c.1227G>A
- MANE Select
- NM_001378414
- dbSNP
- rs768442788
- Type
- single nucleotide variant
- Location
- chr2:239134312 (GRCh38)
- Gene constraint
- LOEUF 0.192 · pLI 1.00 · ClinGen HI 1/3 (gnomAD)
- Structure
- AlphaFold pLDDT 65.67 · 19 PDB
Similar variants
- HDAC4 p.Pro248Leu Pathogenic ★★ same type
- HDAC4 p.Thr244Lys Pathogenic/Likely pathogenic ★★ same type
- HDAC4 c.865+8G>A Uncertain significance ★★ same type
- HDAC4 p.Ala445Thr Uncertain significance ★★ ⚠ same type
- HDAC4 p.Ala620Thr Uncertain significance ★★ ⚠ same type
- HDAC4 p.Ala91Thr Uncertain significance ★★ ⚠ same type
- HDAC4 p.Arg132Trp Uncertain significance ★★ ⚠ same type
- HDAC4 p.Arg13Gln 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/hdac4-p-ala409 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown