NM_006206.6:c.1275T>G

Variant names:

• chr4-54272431-T-G
• rs1553904015
• NM_006206.6:c.1275T>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_006206.6(PDGFRA):​c.1275T>G​(p.His425Gln) 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. 15/22 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. H425Y) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: PDGFRA NM_006206.6 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: -0.959
• 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 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.12935892).

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.1275T>G	p.His425Gln	missense	Exon 9 of 23	NP_006197.1
	PDGFRA	NM_001347828.2		c.1350T>G	p.His450Gln	missense	Exon 10 of 24	NP_001334757.1
	PDGFRA	NM_001347830.2		c.1314T>G	p.His438Gln	missense	Exon 9 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.1275T>G	p.His425Gln	missense	Exon 9 of 23	ENSP00000257290.5
	PDGFRA	ENST00000509092.5	TSL:1	n.1093T>G		non_coding_transcript_exon	Exon 8 of 15
	PDGFRA	ENST00000509490.5	TSL:1	n.1275T>G		non_coding_transcript_exon	Exon 9 of 18	ENSP00000424218.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Gastrointestinal stromal tumor Uncertain:1

Apr 23, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. 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. ClinVar contains an entry for this variant (Variation ID: 528619). This variant has not been reported in the literature in individuals affected with PDGFRA-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces histidine, which is basic and polar, with glutamine, which is neutral and polar, at codon 425 of the PDGFRA protein (p.His425Gln). 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

Jul 27, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.H425Q variant (also known as c.1275T>G), located in coding exon 8 of the PDGFRA gene, results from a T to G substitution at nucleotide position 1275. The histidine at codon 425 is replaced by glutamine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.42
CADD	Benign	0.0070
DANN	Benign	0.96
DEOGEN2	Benign	0.17	T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.26	N
LIST_S2	Benign	0.74	T
M_CAP	Benign	0.055	D
MetaRNN	Benign	0.13	T
MetaSVM	Benign	-0.62	T
MutationAssessor	Uncertain	2.7	M
PhyloP100		-0.96
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	-1.6	N
REVEL	Benign	0.22
Sift	Benign	0.13	T
Sift4G	Benign	0.12	T
Polyphen		0.38	B
Vest4		0.36
MutPred		0.23		Loss of disorder (P = 0.1331)
MVP		0.75
MPC		0.36
ClinPred		0.38	T
GERP RS		-6.7
Varity_R		0.051
gMVP		0.58
Mutation Taster		=56/44	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: rs1553904015; hg19: chr4-55138598;