PPA2 p.Ala109=
c.327C>T · VCV3617290
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00204%, nfe)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| REVEL | 0.24 | benign-leaning |
|---|---|---|
| Splicing | ||
| SpliceAI | <0.2 | no splice effect predicted · four deltas, not one · how we know |
| Constraint at this position | ||
| Conservation | phyloP 6.6 | GERP -1.8, phastCons 1 |
| Overall | ||
| CADD | 10.66 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00204%
European (non-Finnish) · 24/1,175,678 alleles
Filtering AF
0.00138%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00116%
Overall
0.00156%
25/1,600,700 alleles · very rare
exomes 23/1,448,622 · genomes 2/152,078 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| European (non-Finnish)grpmax | 0.00204% | 48,986 |
| African / African-American | 0.00135% | 74,184 |
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
- PPA2
- Protein
- p.Ala109=
- Coding
- c.327C>T
- MANE Select
- NM_176869
- Type
- single nucleotide variant
- Location
- chr4:105446497 (GRCh38)
- Gene constraint
- LOEUF 1.324 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 87.39
Similar variants
- PPA2 p.Arg127Leu Pathogenic/Likely pathogenic ★★ ⚠ same type
- PPA2 p.Glu172Lys Pathogenic/Likely pathogenic ★★ same type
- PPA2 p.Pro228Leu Pathogenic/Likely pathogenic ★★ ⚠ same type
- PPA2 p.Thr159Met Pathogenic/Likely pathogenic ★★ ⚠ same type
- PPA2 c.528+1G>T Uncertain significance ★★ same type
- PPA2 p.Ala12Val Uncertain significance ★★ ⚠ same type
- PPA2 p.Ala130Val Uncertain significance ★★ ⚠ same type
- PPA2 p.Ala16Val 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/ppa2-p-ala109 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown