DSCAM p.Ala221=
c.663G>A · rs767731476 · VCV2652676
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00839%, afr)
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 -4.2 | GERP -1.2 |
| Overall | ||
| CADD | 11.82 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00839%
African / African-American · 6/71,530 alleles
Filtering AF
0.00481%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00441%
Overall
0.00537%
83/1,544,314 alleles · very rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 0.00839% | 11,922 |
| European (non-Finnish) | 0.00598% | 16,711 |
| East Asian | 0.00465% | 21,528 |
| Admixed American | 0.00446% | 22,407 |
| Remaining individualsnot grpmax-eligible | 0.00336% | 29,784 |
| South Asian | 0.00249% | 40,102 |
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
- DSCAM
- Protein
- p.Ala221=
- Coding
- c.663G>A
- MANE Select
- NM_001389
- dbSNP
- rs767731476
- Type
- single nucleotide variant
- Location
- chr21:40353736 (GRCh38)
- Gene constraint
- LOEUF 0.28 · pLI 1.00 · ClinGen HI 2/3 (gnomAD)
- Structure
- AlphaFold pLDDT 69.98 · 1 PDB
Similar variants
- DSCAM p.Ser682Arg Uncertain significance ★★ ⚠ same type
- DSCAM c.5383+9T>A Benign ★★ same type
- DSCAM p.Ala153= Benign ★★ same type
- DSCAM p.Arg1798= Benign/Likely benign ★★ same type
- DSCAM p.Asn1250= Benign ★★ same type
- DSCAM p.Asn576= Benign/Likely benign ★★ same type
- DSCAM p.Asp185= Benign/Likely benign ★★ same type
- DSCAM p.Gln582= Benign ★★ 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/dscam-p-ala221 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown