Is PDGFRA p.Ser776= (c.2328A>G) pathogenic?

PDGFRA p.Ser776= (c.2328A>G) is classified Likely benign in PDGFRA (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-11-01). Ultra-rare (popmax 0.0623%, sas); Associated with gastrointestinal stromal tumor.

What condition is associated with PDGFRA p.Ser776= (c.2328A>G)?

PDGFRA p.Ser776= (c.2328A>G) is associated with gastrointestinal stromal tumor, hereditary neoplastic syndrome (ClinVar).

How common is PDGFRA p.Ser776= (c.2328A>G) in the general population?

PDGFRA p.Ser776= (c.2328A>G) is ultra-rare (popmax 0.0623%, sas) (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.Ser776=

c.2328A>G · rs570110696 · VCV528659

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0623%, sas)

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 -5.9	GERP -4
Overall
CADD	0.225	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0623% South Asian · 53/85,138 alleles

Filtering AF 0.0488% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.044%

Overall 0.00418% 55/1,316,252 alleles · ultra-rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0623%	1,606
Remaining individualsnot grpmax-eligible	0.0038%	26,314

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.Ser776=
Coding: c.2328A>G
MANE Select: NM_006206
dbSNP: rs570110696
Type: single nucleotide variant
Location: chr4:54285375 (GRCh38)
Gene constraint: LOEUF 0.264 · pLI 1.00 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 72.91 · 19 PDB
Residue 776: the protein kinase domain

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.Ser776Ala Uncertain significance ★ ⚠ same residue
PDGFRA p.Ser776Leu 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
PDGFRA c.2002+4G>A Uncertain significance ★★ same condition
PDGFRA c.2002+4G>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-ser776 (accessed [today's date]).

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