PRPH2 p.Ala2Thr
c.4G>A · rs1424831291 · VCV1492157
Uncertain significance
Multiple submitters
Classification
Uncertain significance
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 4 submitters
gnomAD v4.1
Rare
very rare (popmax 0.0011%, nfe)
Conditions
6
PRPH2-related disorder
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| REVEL | 0.186 | benign-leaning |
|---|---|---|
| Splicing | ||
| SpliceAI | <0.2 | no splice effect predicted · four deltas, not one · how we know |
| Constraint at this position | ||
| Conservation | phyloP 7.6 | GERP 1.7, phastCons 1 |
| Regional constraint | o/e 0.98 | unconstrained · MANE · 24 kb · p 0.64 · regional, not allelic |
| Overall | ||
| CADD | 25.0 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0011%
European (non-Finnish) · 13/1,180,026 alleles
Filtering AF
0.000615%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.000474%
Overall
0.000806%
13/1,613,614 alleles · very rare
exomes 13/1,461,276 · genomes 0/152,338 · joint denominator
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
- PRPH2
- Protein
- p.Ala2Thr
- Coding
- c.4G>A
- MANE Select
- NM_000322
- dbSNP
- rs1424831291
- Type
- single nucleotide variant
- Location
- chr6:42722331 (GRCh38)
- Gene constraint
- LOEUF 0.773 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 87.56 · 1 PDB
Similar variants
- PRPH2 p.Ala2Glu Uncertain significance ★★ same residue
- PRPH2 p.Ala2= Likely benign ★★ same residue
- PRPH2 p.Ala2Val Uncertain significance ★ same residue
- PRPH2 p.Ala2Ser Likely pathogenic same residue
- PRPH2 c.582-1G>A Pathogenic/Likely pathogenic ★★ same condition
- PRPH2 c.828+1G>A Pathogenic ★★ same condition
- PRPH2 c.828+1G>T Pathogenic ★★ same condition
- PRPH2 c.828+2T>C Pathogenic/Likely pathogenic ★★ same condition
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/prph2-p-ala2thr (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown