rs2229493

Variant names:

• chr1-21833550-C-A
• rs2229493
• NM_005529.7:c.10895G>T

Your query was ambiguous. Multiple possible variants found:

• chr1-21833550-C-A
• chr1-21833550-C-T
• chr1-21833550-C-G

Variant summary

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

The NM_005529.7(HSPG2):​c.10895G>T​(p.Arg3632Leu) 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. 15/24 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R3632Q) has been classified as Benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: HSPG2 NM_005529.7 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0570
• Publications: 19 publications found

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 Gene-Disease associations (from GenCC):

• Schwartz-Jampel syndrome type 1

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, ClinGen
• Silverman-Handmaker type dyssegmental dysplasia

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen, Labcorp Genetics (formerly Invitae), G2P
• Schwartz-Jampel syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

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: NM_005529.7. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HSPG2	NM_005529.7	MANE Select	c.10895G>T	p.Arg3632Leu	missense	Exon 79 of 97	NP_005520.4
	HSPG2	NM_001291860.2		c.10898G>T	p.Arg3633Leu	missense	Exon 79 of 97	NP_001278789.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HSPG2	ENST00000374695.8	TSL:1 MANE Select	c.10895G>T	p.Arg3632Leu	missense	Exon 79 of 97	ENSP00000363827.3	P98160
	HSPG2	ENST00000635682.1	TSL:5	c.26G>T	p.Arg9Leu	missense	Exon 1 of 9	ENSP00000489161.1	A0A0U1RQT3
	HSPG2	ENST00000471322.2	TSL:5	n.1250G>T		non_coding_transcript_exon	Exon 4 of 5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 1828

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.39
CADD	Benign	19
DANN	Benign	0.91
DEOGEN2	Uncertain	0.64	D
Eigen	Benign	-1.3
Eigen_PC	Benign	-1.4
FATHMM_MKL	Benign	0.42	N
LIST_S2	Benign	0.74	T
M_CAP	Benign	0.085	D
MetaRNN	Benign	0.38	T
MetaSVM	Benign	-0.83	T
MutationAssessor	Benign	1.2	L
PhyloP100		0.057
PrimateAI	Benign	0.26	T
PROVEAN	Uncertain	-3.5	D
REVEL	Benign	0.068
Sift	Benign	0.049	D
Sift4G	Uncertain	0.025	D
Polyphen		0.77	P
Vest4		0.41
MutPred		0.61		Loss of disorder (P = 0.0768)
MVP		0.25
MPC		0.37
ClinPred		0.29	T
GERP RS		-1.1
PromoterAI		0.015	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.19
gMVP		0.58
Mutation Taster		=92/8	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.24		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.24		Position offset: 3

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

Other links and lift over

dbSNP: rs2229493; hg19: chr1-22160043;