PPP2CA p.Ala274=
c.822A>C · rs756668978 · VCV1610320
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 3 submitters
gnomAD v4.1
Rare
very rare (popmax 0.0017%, nfe)
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 0.18 | GERP 0.74, phastCons 0.99 |
| Overall | ||
| CADD | 11.03 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0017%
European (non-Finnish) · 20/1,179,688 alleles
Filtering AF
0.00111%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.0009%
Overall
0.0013%
21/1,613,684 alleles · very rare
exomes 20/1,461,474 · genomes 1/152,210 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| European (non-Finnish)grpmax | 0.0017% | 58,985 |
| Remaining individualsnot grpmax-eligible | 0.0016% | 62,474 |
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
- PPP2CA
- Protein
- p.Ala274=
- Coding
- c.822A>C
- MANE Select
- NM_002715
- dbSNP
- rs756668978
- Type
- single nucleotide variant
- Location
- chr5:134199121 (GRCh38)
- Gene constraint
- LOEUF 0.315 · pLI 1.00 (gnomAD)
- Structure
- AlphaFold pLDDT 94.86 · 50 PDB
- Residue 274
- a UniProt-annotated variant site (in hjs3; may be expressed at very low levels, if any); a UniProt-annotated variant site (in hjs3; loss of phosphatase activity in an in vitro assay; complete loss of interaction with pp2a subunit a ppp2r1a/ppp2r1b; interacts with alpha4/igbp1; loss of interaction with pp2a subunit b components); a β-strand
Similar variants
- PPP2CA p.Ala274Gly Uncertain significance ★ same residue
- PPP2CA p.Asp223His Pathogenic/Likely pathogenic ★★ same type
- PPP2CA p.Asp88Gly Pathogenic/Likely pathogenic ★★ same type
- PPP2CA p.Gln122His Likely pathogenic ★★ same type
- PPP2CA p.His191Arg Pathogenic/Likely pathogenic ★★ same type
- PPP2CA p.Tyr127Cys Likely pathogenic ★★ same type
- PPP2CA p.Tyr265Cys Likely pathogenic ★★ same type
- PPP2CA p.Arg108Cys 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/ppp2ca-p-ala274 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown