APTX p.Ile124Val
c.370A>G · rs143309173 · VCV2161388
Uncertain significance
Single submitter
Classification
Uncertain significance
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.004%, afr)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| REVEL | 0.217 | benign-leaning |
|---|---|---|
| Splicing | ||
| SpliceAI | — | not assessed · no allele here is in the release |
| Constraint at this position | ||
| Conservation | phyloP -12 | GERP -3.4 |
| Regional constraint | o/e 1.01 | unconstrained · MANE · 16 kb · p 0.77 · regional, not allelic |
| Overall | ||
| CADD | 0.001 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.004%
African / African-American · 3/74,934 alleles
Filtering AF
0.00106%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.000495%
Overall
0.00105%
17/1,614,096 alleles · very rare
exomes 16/1,461,892 · genomes 1/152,204 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 0.004% | 24,978 |
| East Asian | 0.00223% | 44,902 |
| Remaining individualsnot grpmax-eligible | 0.0016% | 62,484 |
| South Asian | 0.0011% | 91,088 |
| European (non-Finnish) | 0.000932% | 107,276 |
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
- APTX
- Protein
- p.Ile124Val
- Coding
- c.370A>G
- MANE Select
- NM_001195248
- dbSNP
- rs143309173
- Type
- single nucleotide variant
- Location
- chr9:32987657 (GRCh38)
- Gene constraint
- LOEUF 0.973 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 81.52 · 11 PDB
- Residue 124
- the 'disordered' region
Similar variants
- APTX p.Ile124Leu Uncertain significance ★★ same residue
- APTX c.875-2A>G Pathogenic/Likely pathogenic ★★ same type
- APTX p.Ala198Val Likely pathogenic ★★ same type
- APTX p.Arg16Ter Pathogenic/Likely pathogenic ★★ same type
- APTX p.Arg247Ter Pathogenic/Likely pathogenic ★★ same type
- APTX p.Gln130Ter Pathogenic/Likely pathogenic ★★ same type
- APTX p.Gln187Ter Pathogenic ★★ same type
- APTX p.Trp279Arg Pathogenic/Likely pathogenic ★★ 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/aptx-p-ile124val (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown