11-19182679-CT-C

Position:

• chr11-19182679-CT-C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PVS1_Moderate PM2

The NM_003476.5(CSRP3):​c.575del​(p.Lys192ArgfsTer16) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CSRP3 NM_003476.5 frameshift
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 3.53

Genes affected

CSRP3 (HGNC:2472): (cysteine and glycine rich protein 3) This gene encodes a member of the CSRP family of LIM domain proteins, which may be involved in regulatory processes important for development and cellular differentiation. The LIM/double zinc-finger motif found in this protein is found in a group of proteins with critical functions in gene regulation, cell growth, and somatic differentiation. Mutations in this gene are thought to cause heritable forms of hypertrophic cardiomyopathy (HCM) and dilated cardiomyopathy (DCM) in humans. Alternatively spliced transcript variants with different 5' UTR, but encoding the same protein, have been found for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.0171 CDS is truncated, and there are 0 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CSRP3	NM_003476.5	c.575del	p.Lys192ArgfsTer16	frameshift_variant	6/6	ENST00000265968.9	NP_003467.1
CSRP3	NM_001369404.1	c.406del	p.Arg136GlufsTer21	frameshift_variant	5/5		NP_001356333.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CSRP3	ENST00000265968.9	c.575del	p.Lys192ArgfsTer16	frameshift_variant	6/6	1	NM_003476.5	ENSP00000265968	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Cardiovascular phenotype Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Jan 29, 2013	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Jan 29, 2013	- -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jul 10, 2017

A variant of uncertain significance has been identified in the CSRP3 gene. The c.575delA variant has not been published as pathogenic or been reported as benign to our knowledge. This variant is not observed in large population cohorts (Lek et al., 2016; 1000 Genomes Consortium et al., 2015; Exome Variant Server). The c.575delA variant causes a shift in reading frame starting at codon lysine 192, changing it to an arginine, and creating a premature stop codon at position 16 of the new reading frame, denoted p.Lys192ArgfsX16. However, this variant is not expected to result in either an abnormal, truncated protein product or loss of protein from this allele through nonsense-mediated mRNA decay as it results in the last three amino acids being replaced with 16 incorrect amino acids. Additionally, no other downstream frameshift variants in the CSRP3 gene have been reported in Human Gene Mutation Database in association with cardiomyopathy (Stenson et al., 2014). -

Computational scores

Source: dbNSFP v4.3

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

Other links and lift over

dbSNP: rs1554967246; hg19: chr11-19204226;