TONSL p.Ala823=
c.2469G>A · rs776083590 · VCV1128332
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
ultra-rare (popmax 0.0342%, mid)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Splicing | ||
| SpliceAI | <0.2 | no splice effect predicted · four deltas, not one · how we know |
|---|---|---|
| Constraint at this position | ||
| Conservation | phyloP -11 | GERP -3 |
| Overall | ||
| CADD | 0.666 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0342%
Middle Eastern · 2/5,850 alleles
Filtering AF
0.00601%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00413%
Overall
0.00494%
77/1,558,000 alleles · ultra-rare
exomes 67/1,405,974 · genomes 10/152,026 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Middle Easterngrpmax | 0.0342% | 2,925 |
| European (non-Finnish) | 0.00564% | 17,721 |
| Admixed American | 0.0053% | 18,869 |
| Remaining individualsnot grpmax-eligible | 0.00498% | 20,067 |
| African / African-American | 0.00406% | 24,629 |
| East Asian | 0.00227% | 44,004 |
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
- TONSL
- Protein
- p.Ala823=
- Coding
- c.2469G>A
- MANE Select
- NM_013432
- dbSNP
- rs776083590
- Type
- single nucleotide variant
- Location
- chr8:144435964 (GRCh38)
- Gene constraint
- LOEUF 1.024 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 76.06 · 3 PDB
- Residue 823
- a UniProt-annotated variant site (in semdsp; disease phenotype includes immunologic and hematologic abnormalities); a UniProt-annotated variant site (in semdsp); a UniProt-annotated variant site (in semdsp; disease phenotype includes primary aphakia and absent pupils)
Similar variants
- TONSL p.Ala823Val Uncertain significance ★★ ⚠ same residue
- TONSL c.1891-1G>C Pathogenic/Likely pathogenic ★★ same type
- TONSL p.Arg875Ter Pathogenic/Likely pathogenic ★★ same type
- TONSL p.Arg934Trp Pathogenic ★★ ⚠ same type
- TONSL p.Gln177Ter Pathogenic/Likely pathogenic ★★ same type
- TONSL p.Gln511Ter Pathogenic/Likely pathogenic ★★ same type
- TONSL p.Glu487Lys Pathogenic/Likely pathogenic ★★ ⚠ same type
- TONSL c.2775+5G>T 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/tonsl-p-ala823 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown