Is PDGFRA p.Ala978= (c.2934A>G) pathogenic?

PDGFRA p.Ala978= (c.2934A>G) is classified Likely benign in PDGFRA (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-03-02). Very rare (popmax 0.000339%, nfe); Associated with gastrointestinal stromal tumor.

What condition is associated with PDGFRA p.Ala978= (c.2934A>G)?

PDGFRA p.Ala978= (c.2934A>G) is associated with gastrointestinal stromal tumor, hereditary neoplastic syndrome (ClinVar).

How common is PDGFRA p.Ala978= (c.2934A>G) in the general population?

PDGFRA p.Ala978= (c.2934A>G) is very rare (popmax 0.000339%, 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.Ala978=

c.2934A>G · rs1365020882 · VCV1161185

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

very rare (popmax 0.000339%, 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 -3	GERP -5
Overall
CADD	0.889	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.000339% European (non-Finnish) · 4/1,178,724 alleles

Filtering AF 7.9e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 5.4e-05%

Overall 0.000248% 4/1,612,672 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.Ala978=
Coding: c.2934A>G
MANE Select: NM_006206
dbSNP: rs1365020882
Type: single nucleotide variant
Location: chr4:54290366 (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: 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 p.Ala978Gly Uncertain significance ★★ ⚠ same residue
PDGFRA p.Ala978Ser Uncertain significance ★★ ⚠ same residue
PDGFRA p.Ala978Thr Uncertain significance ★ ⚠ same residue
PDGFRA p.Ala978fs Uncertain significance ★ same residue
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

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-ala978 (accessed [today's date]).

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