ASTN1 p.Ala926Val
c.2777C>T · VCV4157320
Uncertain significance
Single submitter
Classification
Uncertain significance
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00933%, afr)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| REVEL | 0.19 | benign-leaning |
|---|---|---|
| Splicing | ||
| SpliceAI | — | not assessed · no allele here is in the release |
| Constraint at this position | ||
| Conservation | phyloP 7.4 | GERP 1.6, phastCons 1 |
| Regional constraint | o/e 0.93 | unconstrained · MANE · 85 kb · p 0.052 · regional, not allelic |
| Overall | ||
| CADD | 23.4 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00933%
African / African-American · 7/75,054 alleles
Filtering AF
0.00437%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00308%
Overall
0.00112%
18/1,614,120 alleles · very rare
exomes 14/1,461,806 · genomes 4/152,314 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 0.00933% | 10,722 |
| Remaining individualsnot grpmax-eligible | 0.0016% | 62,508 |
| South Asian | 0.0011% | 91,090 |
| European (non-Finnish) | 0.000763% | 131,113 |
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
- ASTN1
- Protein
- p.Ala926Val
- Coding
- c.2777C>T
- MANE Select
- NM_004319
- Type
- single nucleotide variant
- Location
- chr1:176894725 (GRCh38)
- Gene constraint
- LOEUF 0.392 · pLI 1.00 (gnomAD)
- Structure
- AlphaFold pLDDT 64.88
Similar variants
- ASTN1 p.Asp1150Tyr Uncertain significance ★★ same type
- ASTN1 p.His419Asn Uncertain significance ★★ same type
- ASTN1 p.Ser290Gly Uncertain significance ★★ same type
- ASTN1 p.Val1025Leu Uncertain significance ★★ same type
- ASTN1 p.Arg1112Ter Likely pathogenic ★ same type
- ASTN1 p.Gly742Arg Likely pathogenic ★ same type
- ASTN1 c.1523+1G>T Uncertain significance ★ same type
- ASTN1 p.Ala2Thr 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/astn1-p-ala926val (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown