4-54290389-A-T

Variant names:

• chr4-54290389-A-T
• rs372859148
• NM_006206.6:c.2957A>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_006206.6(PDGFRA):​c.2957A>T​(p.Asn986Ile) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. N986K) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: PDGFRA NM_006206.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.77
• Publications: 0 publications found

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]

PDGFRA Gene-Disease associations (from GenCC):

• gastrointestinal stromal tumor

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae)
• polyps, multiple and recurrent inflammatory fibroid, gastrointestinal

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Genomics England PanelApp, Ambry Genetics, G2P
• congenital heart disease

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen
• isolated cleft palate

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ENSG00000282278 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006206.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PDGFRA	NM_006206.6	MANE Select	c.2957A>T	p.Asn986Ile	missense	Exon 22 of 23	NP_006197.1
	PDGFRA	NM_001347828.2		c.3032A>T	p.Asn1011Ile	missense	Exon 23 of 24	NP_001334757.1
	PDGFRA	NM_001347830.2		c.2996A>T	p.Asn999Ile	missense	Exon 22 of 23	NP_001334759.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PDGFRA	ENST00000257290.10	TSL:1 MANE Select	c.2957A>T	p.Asn986Ile	missense	Exon 22 of 23	ENSP00000257290.5
	ENSG00000282278	ENST00000507166.5	TSL:2	c.2237A>T	p.Asn746Ile	missense	Exon 23 of 24	ENSP00000423325.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Gastrointestinal stromal tumor Uncertain:1

Sep 21, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is not present in population databases (ExAC no frequency). This sequence change replaces asparagine with isoleucine at codon 986 of the PDGFRA protein (p.Asn986Ile). The asparagine residue is moderately conserved and there is a large physicochemical difference between asparagine and isoleucine. This variant has not been reported in the literature in individuals affected with PDGFRA-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C15"). 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.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.070	T
BayesDel_noAF	Benign	-0.34
CADD	Benign	20
DANN	Benign	0.97
DEOGEN2	Benign	0.14	T
Eigen	Benign	-0.34
Eigen_PC	Benign	-0.34
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.89	D
M_CAP	Benign	0.069	D
MetaRNN	Uncertain	0.63	D
MetaSVM	Benign	-0.83	T
MutationAssessor	Benign	1.1	L
PhyloP100		6.8
PrimateAI	Uncertain	0.50	T
PROVEAN	Benign	-1.8	N
REVEL	Benign	0.27
Sift	Uncertain	0.017	D
Sift4G	Uncertain	0.032	D
Polyphen		0.80	P
Vest4		0.67
MutPred		0.45		Loss of catalytic residue at N986 (P = 0.1677)
MVP		0.23
MPC		0.047
ClinPred		0.59	D
GERP RS		3.3
Varity_R		0.17
gMVP		0.57
Mutation Taster		=64/36	polymorphism

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

Other links and lift over

dbSNP: rs372859148; hg19: chr4-55156556;