NM_002609.4:c.2083C>T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PP3_ModerateBS1_SupportingBS2

The NM_002609.4(PDGFRB):c.2083C>T(p.Arg695Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000213 in 1,613,614 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R695H) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000085 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00023 ( 0 hom. )

Consequence

PDGFRB
NM_002609.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:2U:4

Conservation

PhyloP100: 2.74

Publications

14 publications found

Variant links:

Genes affected

PDGFRB (HGNC:8804): (platelet derived growth factor receptor beta) The protein encoded by this gene is 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 (PDGFB or PDGFD) or a heterodimer (PDGFA and PDGFB). This gene is essential for normal development of the cardiovascular system and aids in rearrangement of the actin cytoskeleton. This gene is flanked on chromosome 5 by the genes for granulocyte-macrophage colony-stimulating factor and macrophage-colony stimulating factor receptor; all three genes may be implicated in the 5-q syndrome. A translocation between chromosomes 5 and 12, that fuses this gene to that of the ETV6 gene, results in chronic myeloproliferative disorder with eosinophilia. [provided by RefSeq, Aug 2017]

PDGFRB Gene-Disease associations (from GenCC):

acroosteolysis-keloid-like lesions-premature aging syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae)
myofibromatosis, infantile, 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
skeletal overgrowth-craniofacial dysmorphism-hyperelastic skin-white matter lesions syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
basal ganglia calcification, idiopathic, 4
Inheritance: AD Classification: STRONG, MODERATE Submitted by: PanelApp Australia, Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
bilateral striopallidodentate calcinosis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
infantile myofibromatosis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
hereditary progressive mucinous histiocytosis
Inheritance: AD Classification: LIMITED Submitted by: G2P

PDGFRB links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.892

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.0000854 (13/152204) while in subpopulation NFE AF = 0.000162 (11/68026). AF 95% confidence interval is 0.0000905. There are 0 homozygotes in GnomAd4. There are 5 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High AC in GnomAd4 at 13 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002609.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
PDGFRB	NM_002609.4	MANE Select	c.2083C>T	p.Arg695Cys	missense	Exon 15 of 23	NP_002600.1
PDGFRB	NM_001355016.2		c.1891C>T	p.Arg631Cys	missense	Exon 14 of 22	NP_001341945.1
PDGFRB	NM_001355017.2		c.1600C>T	p.Arg534Cys	missense	Exon 15 of 23	NP_001341946.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
PDGFRB	ENST00000261799.9	TSL:1 MANE Select	c.2083C>T	p.Arg695Cys	missense	Exon 15 of 23	ENSP00000261799.4
PDGFRB	ENST00000520579.5	TSL:1	n.*1397C>T		non_coding_transcript_exon	Exon 15 of 23	ENSP00000430026.1
PDGFRB	ENST00000520579.5	TSL:1	n.*1397C>T		3_prime_UTR	Exon 15 of 23	ENSP00000430026.1

Frequencies

GnomAD3 genomes

AF:

0.0000854

AC:

AN:

152204

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000162

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000111

AC:

AN:

251344

AF XY:

0.000110

show subpopulations

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000229

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000226

AC:

330

AN:

1461410

Hom.:

Cov.:

AF XY:

0.000230

AC XY:

167

AN XY:

727060

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33474

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26128

East Asian (EAS)

AF:

0.000227

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53274

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000269

AC:

299

AN:

1111704

Other (OTH)

AF:

0.000348

AC:

AN:

60386

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.477

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000854

AC:

AN:

152204

Hom.:

Cov.:

AF XY:

0.0000672

AC XY:

AN XY:

74362

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41450

American (AMR)

AF:

0.0000654

AC:

AN:

15284

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5194

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.000162

AC:

AN:

68026

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000868

Hom.:

Bravo

AF:

0.0000945

ExAC

AF:

0.0000824

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000178

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:2Uncertain:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Basal ganglia calcification, idiopathic, 4

Pathogenic:1Uncertain:2

Apr 15, 2019

CENTOGENE GmbH and LLC - Guiding Precision Medicine

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

May 02, 2024

Molecular Genetics, Royal Melbourne Hospital

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Jan 01, 2012

Rademakers Lab, Mayo Clinic

Significance:Likely pathogenic

Review Status:no assertion criteria provided

Collection Method:research

Risk allele was found to induce deficient protein function in cell culture

Cerebral palsy

Pathogenic:1

Jun 10, 2021

Neurogenetics Research Program, University of Adelaide

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:research

not provided

Uncertain:1

Aug 01, 2023

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Reported as a variant of uncertain significance in an individual with Alzheimer's disease (Lenglez et al., 2021); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 26599395, 27776010, 25212438, 25686613, 28935882, 28298627, 24796542, 34494111, 31004414, 30805583, 29152850, Kaya_2023, 36469195, 33449152)

Infantile myofibromatosis;C1866182:Acroosteolysis-keloid-like lesions-premature aging syndrome;C3554321:Basal ganglia calcification, idiopathic, 4;C4225270:Skeletal overgrowth-craniofacial dysmorphism-hyperelastic skin-white matter lesions syndrome

Uncertain:1

Mar 01, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 695 of the PDGFRB protein (p.Arg695Cys). This variant is present in population databases (rs138008832, gnomAD 0.02%), and has an allele count higher than expected for a pathogenic variant. This missense change has been observed in individual(s) with basal ganglia calcification (PMID: 24796542, 34494111). ClinVar contains an entry for this variant (Variation ID: 135650). 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 PDGFRB protein function with a negative predictive value of 80%. Experimental studies have shown that this missense change affects PDGFRB function (PMID: 24796542, 34494111). 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

0.31

BayesDel_addAF

Uncertain

0.032

BayesDel_noAF

Uncertain

0.10

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.85

Eigen

Uncertain

0.57

Eigen_PC

Uncertain

0.51

FATHMM_MKL

Uncertain

0.95

LIST_S2

Pathogenic

0.97

M_CAP

Pathogenic

0.37

MetaRNN

Pathogenic

0.89

MetaSVM

Uncertain

0.38

MutationAssessor

Benign

1.4

PhyloP100

2.7

PrimateAI

Pathogenic

0.91

PROVEAN

Pathogenic

-6.4

REVEL

Pathogenic

0.91

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0010

Polyphen

1.0

Vest4

0.95

MutPred

0.63

Loss of disorder (P = 0.0321)

MVP

0.88

MPC

1.3

ClinPred

0.44

GERP RS

4.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.61

gMVP

0.61

Mutation Taster

=11/89

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over