PPCS p.Ala8=
c.24C>G · rs753450689 · VCV1372123
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
ultra-rare (popmax 0.0169%, afr)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Splicing | ||
| SpliceAI | — | not looked up on this page · why |
|---|---|---|
| Constraint at this position | ||
| Conservation | phyloP -7 | GERP -4 |
| Overall | ||
| CADD | 7.811 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0169%
African / African-American · 12/70,940 alleles
Filtering AF
0.00969%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00759%
Overall
0.00107%
16/1,500,028 alleles · ultra-rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 0.0169% | 5,912 |
| Admixed American | 0.00984% | 10,165 |
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
- PPCS
- Protein
- p.Ala8=
- Coding
- c.24C>G
- MANE Select
- NM_001395517 · reported on NM_024664
- dbSNP
- rs753450689
- Type
- single nucleotide variant
- Location
- chr1:42456589 (GRCh38)
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/ppcs-p-ala8 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown