PPP3CA p.Asp493=
c.1479C>T · rs747870270 · VCV1580084
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00667%, amr)
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 -0.45 | GERP -5.5 |
| Overall | ||
| CADD | 7.896 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00667%
Admixed American · 4/59,928 alleles
Filtering AF
0.00418%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.0038%
Overall
0.00446%
72/1,613,254 alleles · very rare
exomes 60/1,461,542 · genomes 12/151,712 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Admixed Americangrpmax | 0.00667% | 14,982 |
| European (non-Finnish) | 0.00526% | 19,027 |
| Remaining individualsnot grpmax-eligible | 0.0032% | 31,227 |
| East Asian | 0.00223% | 44,860 |
| South Asian | 0.0022% | 45,524 |
| African / African-American | 0.00134% | 74,778 |
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
- PPP3CA
- Protein
- p.Asp493=
- Coding
- c.1479C>T
- MANE Select
- NM_000944
- dbSNP
- rs747870270
- Type
- single nucleotide variant
- Location
- chr4:101025952 (GRCh38)
- Gene constraint
- LOEUF 0.243 · pLI 1.00 (gnomAD)
- Structure
- AlphaFold pLDDT 86.24 · 21 PDB
- Residue 493
- a UniProt-annotated variant site (in iecee1; results in constitutive phosphatase activity in the absence of calmodulin); a UniProt-annotated variant site (in iecee1); the 'disordered' region
Similar variants
- PPP3CA p.Asp493Asn Likely pathogenic ★ ⚠ same residue
- PPP3CA p.Asp493Glu Uncertain significance ★ ⚠ same residue
- PPP3CA c.1340-2A>G Pathogenic/Likely pathogenic ★★ same type
- PPP3CA p.Ala447Thr Pathogenic/Likely pathogenic ★★ ⚠ same type
- PPP3CA p.Arg254Ser Pathogenic/Likely pathogenic ★★ same type
- PPP3CA p.Asp234Glu Pathogenic/Likely pathogenic ★★ same type
- PPP3CA p.Glu282Lys Pathogenic/Likely pathogenic ★★ same type
- PPP3CA p.Glu456Ter 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/ppp3ca-p-asp493 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown