4-54295199-C-T

Variant names:

• chr4-54295199-C-T
• rs775944809
• NM_006206.6:c.3197C>T

Variant summary

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

The ENST00000257290.10(PDGFRA):​c.3197C>T​(p.Thr1066Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,182 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. T1066N) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: PDGFRA ENST00000257290.10 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 7.57
• Publications: 4 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: ENST00000257290.10. 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.3197C>T	p.Thr1066Ile	missense	Exon 23 of 23	NP_006197.1
	PDGFRA	NM_001347828.2		c.3272C>T	p.Thr1091Ile	missense	Exon 24 of 24	NP_001334757.1
	PDGFRA	NM_001347830.2		c.3236C>T	p.Thr1079Ile	missense	Exon 23 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.3197C>T	p.Thr1066Ile	missense	Exon 23 of 23	ENSP00000257290.5
	ENSG00000282278	ENST00000507166.5	TSL:2	c.2477C>T	p.Thr826Ile	missense	Exon 24 of 24	ENSP00000423325.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251246 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461182 Hom.: 0 Cov.: 35 AF XY: 0.00000138 AC XY: 1 AN XY: 726932

African (AFR) AF: 0.00 AC: 0 AN: 33474

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.0000504 AC: 2 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86246

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111356

Other (OTH) AF: 0.00 AC: 0 AN: 60370

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ExAC AF: 0.00000824 AC: 1

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	Gastrointestinal stromal tumor (1)
-	1	-	Hereditary cancer-predisposing syndrome (1)
-	1	-	Idiopathic hypereosinophilic syndrome;C5193005:Polyps, multiple and recurrent inflammatory fibroid, gastrointestinal (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.30
BayesDel_addAF	Uncertain	0.063	T
BayesDel_noAF	Uncertain	0.020
CADD	Pathogenic	26
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.078	T
Eigen	Pathogenic	0.74
Eigen_PC	Pathogenic	0.77
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.91	D
M_CAP	Uncertain	0.10	D
MetaRNN	Uncertain	0.48	T
MetaSVM	Uncertain	0.026	D
MutationAssessor	Uncertain	2.1	M
PhyloP100		7.6
PrimateAI	Pathogenic	0.85	D
PROVEAN	Benign	-1.5	N
REVEL	Uncertain	0.34
Sift	Uncertain	0.0030	D
Sift4G	Benign	0.16	T
Polyphen		1.0	D
Vest4		0.83
MutPred		0.063		Loss of loop (P = 0.0374)
MVP		0.38
MPC		0.25
ClinPred		0.92	D
GERP RS		5.8
Varity_R		0.14
gMVP		0.67
Mutation Taster		=23/77	disease causing

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: rs775944809; hg19: chr4-55161366; COSMIC: COSV57273407;