Is PDGFRA p.Ala498= (c.1494C>T) pathogenic?

PDGFRA p.Ala498= (c.1494C>T) is classified Benign/Likely benign in PDGFRA (ClinVar, Multiple submitters, 4 submitters; last evaluated 2026-06-17). Ultra-rare (popmax 0.0329%, mid); Associated with hereditary neoplastic syndrome.

What condition is associated with PDGFRA p.Ala498= (c.1494C>T)?

PDGFRA p.Ala498= (c.1494C>T) is associated with hereditary neoplastic syndrome, polyps, multiple and recurrent inflammatory fibroid, gastrointestinal, gastrointestinal stromal tumor (ClinVar).

How common is PDGFRA p.Ala498= (c.1494C>T) in the general population?

PDGFRA p.Ala498= (c.1494C>T) is ultra-rare (popmax 0.0329%, mid) (gnomAD).

PDGFRA p.Ala498=

c.1494C>T · rs200434193 · VCV240310

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0329%, mid)

Conditions

hereditary neoplastic syndrome

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 -13	GERP -4
Overall
CADD	0.155	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0329% Middle Eastern · 2/6,082 alleles

Filtering AF 0.0058% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00403%

Overall 0.00483% 78/1,613,934 alleles · ultra-rare

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0329%	3,041
African / African-American	0.00935%	10,700
European (non-Finnish)	0.00551%	18,154
South Asian	0.00329%	30,361
Admixed American	0.00167%	60,002

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.Ala498=
Coding: c.1494C>T
MANE Select: NM_006206
dbSNP: rs200434193
Type: single nucleotide variant
Location: chr4:54273666 (GRCh38)
Gene constraint: LOEUF 0.264 · pLI 1.00 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 72.91 · 19 PDB
Residue 498: a disulfide bond; the ig-like c2-type 5 domain

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

Disease context

hereditary neoplastic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: polyps, multiple and recurrent inflammatory fibroid, gastrointestinal gastrointestinal stromal tumor

Similar variants

PDGFRA p.Ala498Val Uncertain significance ★★ ⚠ same residue
PDGFRA p.Ala498Thr Conflicting classifications of pathogenicity ★ ⚠ 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-ala498 (accessed [today's date]).

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