TONSL p.Pro755=
c.2265G>A · rs755424988 · VCV1556915
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
ultra-rare (popmax 0.0167%, mid)
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 -7.2 | GERP -3 |
| Overall | ||
| CADD | 1.679 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0167%
Middle Eastern · 1/5,988 alleles
Filtering AF
0.00176%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00132%
Overall
0.00222%
35/1,573,634 alleles · ultra-rare
exomes 32/1,421,452 · genomes 3/152,182 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Middle Easterngrpmax | 0.0167% | 5,988 |
| African / African-American | 0.00538% | 18,578 |
| Ashkenazi Jewishnot grpmax-eligible | 0.00345% | 28,946 |
| East Asian | 0.00229% | 43,752 |
| South Asian | 0.00225% | 44,430 |
| European (non-Finnish) | 0.00223% | 44,840 |
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.Pro755=
- Coding
- c.2265G>A
- MANE Select
- NM_013432
- dbSNP
- rs755424988
- Type
- single nucleotide variant
- Location
- chr8:144436168 (GRCh38)
- Gene constraint
- LOEUF 1.024 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 76.06 · 3 PDB
- Residue 755
- the 'disordered' region; 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 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
- TONSL p.Ala1053Ser 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-pro755 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown