Genetic Variant CSPG4:p.Arg2093Cys (chr15-75676242-G-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001897.5(CSPG4):c.6277C>T(p.Arg2093Cys) variant causes a missense change. The variant allele was found at a frequency of 0.0000103 in 1,556,638 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000011 ( 0 hom. )

Consequence

CSPG4
NM_001897.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.64

Variant links:

Genes affected

CSPG4 (HGNC:2466): (chondroitin sulfate proteoglycan 4) A human melanoma-associated chondroitin sulfate proteoglycan plays a role in stabilizing cell-substratum interactions during early events of melanoma cell spreading on endothelial basement membranes. CSPG4 represents an integral membrane chondroitin sulfate proteoglycan expressed by human malignant melanoma cells. [provided by RefSeq, Jul 2008]

CSPG4 links:

ENSG00000260892 (HGNC:):

ENSG00000260892 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CSPG4	NM_001897.5 link	c.6277C>T	p.Arg2093Cys	missense_variant	Exon 10 of 10	ENST00000308508.5	NP_001888.2	Q6UVK1
CSPG4	XM_047432196.1 link	c.5215C>T	p.Arg1739Cys	missense_variant	Exon 10 of 10		XP_047288152.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CSPG4	ENST00000308508.5 link	c.6277C>T	p.Arg2093Cys	missense_variant	Exon 10 of 10	1	NM_001897.5	ENSP00000312506.5		Q6UVK1
ENSG00000260892	ENST00000569467.1 link	n.16G>A		non_coding_transcript_exon_variant	Exon 1 of 2	4

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152244

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000182

AC:

AN:

164496

Hom.:

AF XY:

0.0000223

AC XY:

AN XY:

89860

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 SAS exome

AF:

0.0000394

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000283

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000107

AC:

AN:

1404394

Hom.:

Cov.:

AF XY:

0.0000115

AC XY:

AN XY:

695430

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000271

Gnomad4 SAS exome

AF:

0.0000733

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000642

Gnomad4 OTH exome

AF:

0.0000170

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152244

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74368

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000586

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.00000857

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 25, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.6277C>T (p.R2093C) alteration is located in exon 10 (coding exon 10) of the CSPG4 gene. This alteration results from a C to T substitution at nucleotide position 6277, causing the arginine (R) at amino acid position 2093 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.19

BayesDel_addAF

Benign

-0.077

BayesDel_noAF

Benign

-0.23

CADD

Uncertain

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.65

Eigen

Uncertain

0.48

Eigen_PC

Uncertain

0.36

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.88

M_CAP

Benign

0.045

MetaRNN

Uncertain

0.59

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.8

PrimateAI

Uncertain

0.57

PROVEAN

Pathogenic

-5.0

REVEL

Benign

0.26

Sift

Uncertain

0.0010

Sift4G

Pathogenic

0.0010

Polyphen

1.0

Vest4

0.50

MutPred

0.51

Loss of sheet (P = 0.0054);

MVP

0.57

MPC

1.3

ClinPred

0.96

GERP RS

4.6

Varity_R

0.35

gMVP

0.80

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