Is PPARG p.Cys109Arg (c.325T>C) pathogenic?

PPARG p.Cys109Arg (c.325T>C) is classified Uncertain significance in PPARG (ClinVar, Single submitter, 1 submitter; last evaluated 2025-01-27). AlphaMissense: likely pathogenic (1); Absent from gnomAD v4.1.

How common is PPARG p.Cys109Arg (c.325T>C) in the general population?

PPARG p.Cys109Arg (c.325T>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about PPARG p.Cys109Arg (c.325T>C)?

AlphaMissense predicts likely pathogenic (score 1) — an in-silico prediction, not a clinical call.

PPARG p.Cys109Arg

c.325T>C · VCV4071676

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

1 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	1	likely pathogenic · top 8% in PPARG
REVEL	0.949	strongly pathogenic-leaning
SaProt	LLR -17.01	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 6.1	GERP 1.9, phastCons 1
Regional constraint	o/e 0.60	unconstrained · MANE · 53 kb · p 1.2e-17 · regional, not allelic
Overall
CADD	28.8	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — a triage signal, not a reclassification

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

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM C139R vs ClinVar C109R) — verify the residue.

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: PPARG
Protein: p.Cys109Arg
Coding: c.325T>C
MANE Select: NM_138711
Type: single nucleotide variant
Location: chr3:12381426 (GRCh38)
Gene constraint: LOEUF 0.628 · pLI 0.21 (gnomAD)
Structure: AlphaFold pLDDT 76.11 · 321 PDB
Residue 139 UniProt numbering: a DNA-binding region

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

Similar variants

PPARG p.Arg164Gln Likely pathogenic ★★ same type
PPARG p.Arg395Cys Pathogenic/Likely pathogenic ★★ same type
PPARG p.Arg395His Pathogenic/Likely pathogenic ★★ same type
PPARG p.Pro465Leu Pathogenic/Likely pathogenic ★★ same type
PPARG p.Tyr121Cys Pathogenic/Likely pathogenic ★★ same type
PPARG c.-8A>G Uncertain significance ★★ ⚠ same type
PPARG p.Arg110His Uncertain significance ★★ ⚠ same type
PPARG p.Arg151Gln 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/pparg-p-cys109arg (accessed [today's date]).

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