Is PPP2CA p.Cys50Ser (c.149G>C) pathogenic?

PPP2CA p.Cys50Ser (c.149G>C) is classified Uncertain significance in PPP2CA (ClinVar, Single submitter, 1 submitter; last evaluated 2022-07-25). AlphaMissense: ambiguous (0.5116); Absent from gnomAD v4.1.

How common is PPP2CA p.Cys50Ser (c.149G>C) in the general population?

PPP2CA p.Cys50Ser (c.149G>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about PPP2CA p.Cys50Ser (c.149G>C)?

AlphaMissense predicts ambiguous (score 0.5116) — an in-silico prediction, not a clinical call.

PPP2CA p.Cys50Ser

c.149G>C · rs2481058494 · VCV2576014

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.5116 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Computational evidence

Protein change
AlphaMissense	0.5116	ambiguous
REVEL	0.391	indeterminate
SaProt	LLR -8.76	tolerated
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 6	GERP 1.9, phastCons 1
Regional constraint	o/e 0.12	constrained · MANE · 130 bp · p 1.6e-10 · regional, not allelic
Overall
CADD	24.1	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: PPP2CA
Protein: p.Cys50Ser
Coding: c.149G>C
MANE Select: NM_002715
dbSNP: rs2481058494
Type: single nucleotide variant
Location: chr5:134206085 (GRCh38)
Gene constraint: LOEUF 0.315 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 94.86 · 50 PDB
Residue 50: a β-strand

Full PPP2CA gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

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
PPP2CA p.Asp57Asn 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-cys50ser (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown