DONSON p.Ala90=
c.270C>T · rs1601320139 · VCV2021174
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00267%, sas)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| REVEL | 0.009 | strongly benign-leaning |
|---|---|---|
| Splicing | ||
| SpliceAI | — | not assessed · no allele here is in the release |
| Constraint at this position | ||
| Conservation | phyloP 0.14 | GERP 3.8, phastCons 0.001 |
| Overall | ||
| CADD | 10.82 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00267%
South Asian · 1/37,496 alleles
Overall
0.000176%
2/1,138,918 alleles · very rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| South Asiangrpmax | 0.00267% | 37,496 |
| Remaining individualsnot grpmax-eligible | 0.00208% | 48,028 |
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
- DONSON
- Protein
- p.Ala90=
- Coding
- c.270C>T
- MANE Select
- NM_017613
- dbSNP
- rs1601320139
- Type
- single nucleotide variant
- Location
- chr21:33588372 (GRCh38)
- Gene constraint
- LOEUF 0.918 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 72.94
- Residue 90
- the 'disordered' region
Similar variants
- DONSON p.Ala90Val Uncertain significance ★ ⚠ same residue
- DONSON c.1047-9A>G Pathogenic ★★ same type
- DONSON c.1563+1G>T Pathogenic ★★ same type
- DONSON p.Arg293Ter Pathogenic ★★ same type
- DONSON p.Arg442Ter Pathogenic ★★ same type
- DONSON p.Gln428Ter Pathogenic/Likely pathogenic ★★ same type
- DONSON p.Phe165Ser Pathogenic/Likely pathogenic ★★ same type
- DONSON p.Ala32Gly 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/donson-p-ala90 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown