Is PDGFRA p.Ser308= (c.924T>C) pathogenic?

PDGFRA p.Ser308= (c.924T>C) is classified Benign/Likely benign in PDGFRA (ClinVar, Multiple submitters, 3 submitters; last evaluated 2026-06-16). Very rare (popmax 0.00237%, nfe); Associated with gastrointestinal stromal tumor.

What condition is associated with PDGFRA p.Ser308= (c.924T>C)?

PDGFRA p.Ser308= (c.924T>C) is associated with gastrointestinal stromal tumor, polyps, multiple and recurrent inflammatory fibroid, gastrointestinal, hereditary neoplastic syndrome (ClinVar).

How common is PDGFRA p.Ser308= (c.924T>C) in the general population?

PDGFRA p.Ser308= (c.924T>C) is very rare (popmax 0.00237%, nfe) (gnomAD).

How is Gastrointestinal stromal tumor inherited?

Typically Autosomal dominant, Not applicable (Orphanet). A genetic counselor can assess individual risk for a family.

PDGFRA p.Ser308=

c.924T>C · rs1220005025 · VCV748090

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00237%, nfe)

Conditions

gastrointestinal stromal tumor

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 -0.32	GERP -0.12, phastCons 0.38
Overall
CADD	8.361	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00237% European (non-Finnish) · 28/1,180,040 alleles

Filtering AF 0.00164% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00142%

Overall 0.00173% 28/1,614,082 alleles · very rare

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: PDGFRA
Protein: p.Ser308=
Coding: c.924T>C
MANE Select: NM_006206
dbSNP: rs1220005025
Type: single nucleotide variant
Location: chr4:54267453 (GRCh38)
Gene constraint: LOEUF 0.264 · pLI 1.00 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 72.91 · 19 PDB

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

Disease context

gastrointestinal stromal tumor — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: polyps, multiple and recurrent inflammatory fibroid, gastrointestinal hereditary neoplastic syndrome

For Gastrointestinal stromal tumor (Orphanet):

Inheritance: Autosomal dominant, Not applicable
Onset: Adolescent, Adult, Childhood
Prevalence: 1-5 / 10 000 (Europe)

Similar variants

PDGFRA c.1364+3A>G Uncertain significance ★★ same condition
PDGFRA c.1364+4T>C Uncertain significance ★★ same condition
PDGFRA c.1787-5C>G Uncertain significance ★★ same condition
PDGFRA c.2002+2T>C Uncertain significance ★★ same condition
PDGFRA c.2002+4G>A Uncertain significance ★★ same condition
PDGFRA c.2002+4G>T Uncertain significance ★★ same condition
PDGFRA c.2002+5G>C Uncertain significance ★★ same condition
PDGFRA c.2002+5G>T Uncertain significance ★★ same condition

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/pdgfra-p-ser308 (accessed [today's date]).

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