rs757720616

Positions:

• chr4-54289104-A-G

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 3P and 6B. PM2 PP2 BP4_Moderate BS2

The NM_006206.6(PDGFRA):​c.2870A>G​(p.Gln957Arg) variant causes a missense change. The variant allele was found at a frequency of 0.0000035 in 1,429,246 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000035 (0 hom.)
• Consequence: PDGFRA NM_006206.6 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 5.21

Genes affected

PDGFRA (HGNC:8803): (platelet derived growth factor receptor alpha) This gene encodes a cell surface tyrosine kinase receptor for members of the platelet-derived growth factor family. These growth factors are mitogens for cells of mesenchymal origin. The identity of the growth factor bound to a receptor monomer determines whether the functional receptor is a homodimer or a heterodimer, composed of both platelet-derived growth factor receptor alpha and beta polypeptides. Studies suggest that this gene plays a role in organ development, wound healing, and tumor progression. Mutations in this gene have been associated with idiopathic hypereosinophilic syndrome, somatic and familial gastrointestinal stromal tumors, and a variety of other cancers. [provided by RefSeq, Mar 2012]

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), PDGFRA. . Gene score misZ 1.9401 (greater than the threshold 3.09). Trascript score misZ 3.4078 (greater than threshold 3.09). GenCC has associacion of gene with congenital heart disease, polyps, multiple and recurrent inflammatory fibroid, gastrointestinal, gastrointestinal stromal tumor, isolated cleft palate.
• BP4: Computational evidence support a benign effect (MetaRNN=0.24912238).
• BS2: High AC in GnomAdExome4 at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PDGFRA	NM_006206.6	c.2870A>G	p.Gln957Arg	missense_variant	21/23	ENST00000257290.10	NP_006197.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PDGFRA	ENST00000257290.10	c.2870A>G	p.Gln957Arg	missense_variant	21/23	1	NM_006206.6	ENSP00000257290	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000796 AC: 2 AN: 251128 Hom.: 0 AF XY: 0.0000147 AC XY: 2 AN XY: 135684

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000350 AC: 5 AN: 1429246 Hom.: 0 Cov.: 26 AF XY: 0.00000421 AC XY: 3 AN XY: 713288

Gnomad4 AFR exome AF: 0.0000305

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000370

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.0000165 AC: 2

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Polyps, multiple and recurrent inflammatory fibroid, gastrointestinal Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Baylor Genetics

Nov 03, 2023

- -

Gastrointestinal stromal tumor Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 23, 2023

This sequence change replaces glutamine, which is neutral and polar, with arginine, which is basic and polar, at codon 957 of the PDGFRA protein (p.Gln957Arg). This variant is present in population databases (rs757720616, gnomAD 0.002%). This variant has not been reported in the literature in individuals affected with PDGFRA-related conditions. ClinVar contains an entry for this variant (Variation ID: 570015). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt PDGFRA protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 01, 2024

The p.Q957R variant (also known as c.2870A>G), located in coding exon 20 of the PDGFRA gene, results from an A to G substitution at nucleotide position 2870. The glutamine at codon 957 is replaced by arginine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Based on the available evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Uncertain	0.055	T
BayesDel_noAF	Benign	-0.14
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.053	.;T
Eigen	Benign	-0.15
Eigen_PC	Benign	0.060
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.64	T;T
M_CAP	Benign	0.025	T
MetaRNN	Benign	0.25	T;T
MetaSVM	Benign	-0.76	T
MutationAssessor	Benign	0.0	.;N
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.46	T
PROVEAN	Benign	-0.70	N;N
REVEL	Uncertain	0.29
Sift	Benign	0.52	T;T
Sift4G	Benign	0.56	T;T
Polyphen		0.20	.;B
Vest4		0.27
MutPred		0.32		.;Loss of ubiquitination at K959 (P = 0.063);
MVP		0.87
MPC		0.037
ClinPred		0.36	T
GERP RS		6.0
Varity_R		0.48
gMVP		0.48

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs757720616; hg19: chr4-55155271;