rs143669458

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 1P and 13B. PP2BP4_StrongBP6BS1BS2

The NM_005529.7(HSPG2):c.2074G>A(p.Val692Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00373 in 1,613,754 control chromosomes in the GnomAD database, including 13 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0031 ( 1 hom., cov: 33)

Exomes 𝑓: 0.0038 ( 12 hom. )

Consequence

HSPG2
NM_005529.7 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:10

Conservation

PhyloP100: 1.23

Variant links:

Genes affected

HSPG2 (HGNC:5273): (heparan sulfate proteoglycan 2) This gene encodes the perlecan protein, which consists of a core protein to which three long chains of glycosaminoglycans (heparan sulfate or chondroitin sulfate) are attached. The perlecan protein is a large multidomain proteoglycan that binds to and cross-links many extracellular matrix components and cell-surface molecules. It has been shown that this protein interacts with laminin, prolargin, collagen type IV, FGFBP1, FBLN2, FGF7 and transthyretin, etc., and it plays essential roles in multiple biological activities. Perlecan is a key component of the vascular extracellular matrix, where it helps to maintain the endothelial barrier function. It is a potent inhibitor of smooth muscle cell proliferation and is thus thought to help maintain vascular homeostasis. It can also promote growth factor (e.g., FGF2) activity and thus stimulate endothelial growth and re-generation. It is a major component of basement membranes, where it is involved in the stabilization of other molecules as well as being involved with glomerular permeability to macromolecules and cell adhesion. Mutations in this gene cause Schwartz-Jampel syndrome type 1, Silverman-Handmaker type of dyssegmental dysplasia, and tardive dyskinesia. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, May 2014]

HSPG2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -12 ACMG points.

PP2

Missense variant where missense usually causes diseases, HSPG2

BP4

Computational evidence support a benign effect (MetaRNN=0.011616558).

BP6

Variant 1-21880484-C-T is Benign according to our data. Variant chr1-21880484-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 194641.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=5, Benign=3, Uncertain_significance=1}. Variant chr1-21880484-C-T is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.0031 (472/152342) while in subpopulation NFE AF= 0.00445 (303/68032). AF 95% confidence interval is 0.00404. There are 1 homozygotes in gnomad4. There are 206 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome at 3 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HSPG2	NM_005529.7 linkuse as main transcript	c.2074G>A	p.Val692Met	missense_variant	16/97	ENST00000374695.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HSPG2	ENST00000374695.8 linkuse as main transcript	c.2074G>A	p.Val692Met	missense_variant	16/97	1	NM_005529.7	P1

Frequencies

GnomAD3 genomes

AF:

0.00310

AC:

472

AN:

152224

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000868

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00366

Gnomad ASJ

AF:

0.0144

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00104

Gnomad FIN

AF:

0.00122

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00445

Gnomad OTH

AF:

0.00430

GnomAD3 exomes

AF:

0.00290

AC:

724

AN:

250058

Hom.:

AF XY:

0.00291

AC XY:

394

AN XY:

135454

show subpopulations

Gnomad AFR exome

AF:

0.000620

Gnomad AMR exome

AF:

0.00252

Gnomad ASJ exome

AF:

0.0105

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000621

Gnomad FIN exome

AF:

0.00117

Gnomad NFE exome

AF:

0.00409

Gnomad OTH exome

AF:

0.00262

GnomAD4 exome

AF:

0.00380

AC:

5550

AN:

1461412

Hom.:

Cov.:

AF XY:

0.00369

AC XY:

2683

AN XY:

727002

show subpopulations

Gnomad4 AFR exome

AF:

0.000568

Gnomad4 AMR exome

AF:

0.00246

Gnomad4 ASJ exome

AF:

0.0115

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000615

Gnomad4 FIN exome

AF:

0.00154

Gnomad4 NFE exome

AF:

0.00428

Gnomad4 OTH exome

AF:

0.00359

GnomAD4 genome

AF:

0.00310

AC:

472

AN:

152342

Hom.:

Cov.:

AF XY:

0.00277

AC XY:

206

AN XY:

74500

show subpopulations

Gnomad4 AFR

AF:

0.000866

Gnomad4 AMR

AF:

0.00366

Gnomad4 ASJ

AF:

0.0144

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00104

Gnomad4 FIN

AF:

0.00122

Gnomad4 NFE

AF:

0.00445

Gnomad4 OTH

AF:

0.00425

Alfa

AF:

0.00430

Hom.:

Bravo

AF:

0.00304

TwinsUK

AF:

0.00297

AC:

ALSPAC

AF:

0.00337

AC:

ESP6500AA

AF:

0.000908

AC:

ESP6500EA

AF:

0.00326

AC:

ExAC

AF:

0.00284

AC:

345

Asia WGS

AF:

0.00115

AC:

AN:

3478

EpiCase

AF:

0.00425

EpiControl

AF:

0.00362

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:10

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Benign:6

Benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Sep 01, 2022	HSPG2: BP4, BS1, BS2 -
Benign, criteria provided, single submitter	clinical testing	Invitae	Jan 22, 2024	- -
Likely benign, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -
Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Sep 14, 2018	- -
Likely benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Nov 02, 2023	- -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -

not specified

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Dec 15, 2016	The V692M variant in the HSPG2 gene was identified in the heterozygous state in a single individual with idiopathic scoliosis (Baschal et al., 2015). The NHLBI ESP Exome Sequencing Project reports V692M was observed in 0.33% (28/8600) of alleles from individuals of European background, indicating it may be a rare variant in this population, although no individuals within this control group were reported as homozygous for this variant. The V692M variant is a conservative amino acid substitution, which is not likely to impact secondary protein structure as these residues share similar properties. This substitution occurs at a position where amino acids with similar properties to Valine are tolerated across species, but in silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function. We interpret V692M as a variant of uncertain significance. -
Likely benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Apr 13, 2015	- -

Lethal Kniest-like syndrome

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Schwartz-Jampel syndrome

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

Connective tissue disorder

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Genome Diagnostics Laboratory, The Hospital for Sick Children

Mar 01, 2020

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.44

BayesDel_noAF

Benign

-0.41

Cadd

Benign

Dann

Uncertain

1.0

DEOGEN2

Benign

0.20

Eigen

Uncertain

0.38

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Benign

0.59

LIST_S2

Benign

0.79

M_CAP

Benign

0.019

MetaRNN

Benign

0.012

MetaSVM

Benign

-0.89

MutationAssessor

Benign

1.9

MutationTaster

Benign

0.79

PrimateAI

Benign

0.46

PROVEAN

Benign

-2.0

REVEL

Benign

0.090

Sift

Uncertain

0.021

Sift4G

Uncertain

0.0020

Polyphen

0.96

Vest4

0.22

MVP

0.37

MPC

0.24

ClinPred

0.014

GERP RS

4.5

Varity_R

0.10

gMVP

0.45

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over