rs1553904188

Variant names:

• chr4-54273601-C-A
• rs1553904188
• NM_006206.6:c.1429C>A

Your query was ambiguous. Multiple possible variants found:

• chr4-54273601-C-A
• chr4-54273601-C-T

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_006206.6(PDGFRA):​c.1429C>A​(p.His477Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 17/22 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. H477Q) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 31)
• Consequence: PDGFRA NM_006206.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.62
• 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 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.27904993).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PDGFRA	NM_006206.6	c.1429C>A	p.His477Asn	missense_variant	Exon 10 of 23	ENST00000257290.10	NP_006197.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PDGFRA	ENST00000257290.10	c.1429C>A	p.His477Asn	missense_variant	Exon 10 of 23	1	NM_006206.6	ENSP00000257290.5
PDGFRA	ENST00000509092.5	n.1247C>A		non_coding_transcript_exon_variant	Exon 9 of 15	1
PDGFRA	ENST00000509490.5	n.1429C>A		non_coding_transcript_exon_variant	Exon 10 of 18	1		ENSP00000424218.1
ENSG00000282278	ENST00000507166.5	c.1018-1324C>A		intron_variant	Intron 12 of 23	2		ENSP00000423325.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Gastrointestinal stromal tumor Uncertain:1

Aug 10, 2020

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant has not been reported in the literature in individuals with PDGFRA-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. 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. This variant is not present in population databases (ExAC no frequency). This sequence change replaces histidine with asparagine at codon 477 of the PDGFRA protein (p.His477Asn). The histidine residue is moderately conserved and there is a small physicochemical difference between histidine and asparagine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.063
BayesDel_addAF	Benign	-0.098	T
BayesDel_noAF	Benign	-0.38
CADD	Benign	5.5
DANN	Benign	0.94
DEOGEN2	Benign	0.046	T
Eigen	Benign	-0.71
Eigen_PC	Benign	-0.70
FATHMM_MKL	Uncertain	0.76	D
LIST_S2	Benign	0.67	T
M_CAP	Benign	0.019	T
MetaRNN	Benign	0.28	T
MetaSVM	Benign	-0.82	T
MutationAssessor	Benign	1.1	L
PhyloP100		1.6
PrimateAI	Benign	0.43	T
PROVEAN	Benign	0.50	N
REVEL	Benign	0.15
Sift	Benign	0.46	T
Sift4G	Benign	0.60	T
Polyphen		0.11	B
Vest4		0.51
MutPred		0.15		Gain of disorder (P = 0.168);
MVP		0.70
MPC		0.39
ClinPred		0.075	T
GERP RS		2.9
Varity_R		0.095
gMVP		0.65
Mutation Taster		=84/16	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: rs1553904188; hg19: chr4-55139768;