rs145300736

Variant names:

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1PM2PM5

The NM_003476.5(CSRP3):c.148G>A(p.Ala50Thr) variant causes a missense change. The variant allele was found at a frequency of 0.0000446 in 1,612,654 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A50V) has been classified as Likely pathogenic.

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000044 ( 0 hom. )

Consequence

CSRP3
NM_003476.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:7

Conservation

PhyloP100: 4.96

Variant links:

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]

CSRP3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM1

In a domain LIM zinc-binding 1 (size 51) in uniprot entity CSRP3_HUMAN there are 6 pathogenic changes around while only 0 benign (100%) in NM_003476.5

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr11-19188268-G-A is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CSRP3	NM_003476.5 link	c.148G>A	p.Ala50Thr	missense_variant	Exon 3 of 6	ENST00000265968.9	NP_003467.1	P50461-1A2TDB8
CSRP3	NM_001369404.1 link	c.113-1921G>A		intron_variant	Intron 2 of 4		NP_001356333.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CSRP3	ENST00000265968.9 link	c.148G>A	p.Ala50Thr	missense_variant	Exon 3 of 6	1	NM_003476.5	ENSP00000265968.3		P50461-1

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152122

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000398

AC:

AN:

250998

Hom.:

AF XY:

0.0000369

AC XY:

AN XY:

135652

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.0000867

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000109

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000438

AC:

AN:

1460532

Hom.:

Cov.:

AF XY:

0.0000509

AC XY:

AN XY:

726574

show subpopulations

Gnomad4 AFR exome

AF:

0.0000897

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000486

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000526

AC:

AN:

152122

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74322

show subpopulations

Gnomad4 AFR

AF:

0.0000724

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000444

Hom.:

Bravo

AF:

0.0000604

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.0000412

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Dilated cardiomyopathy 1M;C2677491:Hypertrophic cardiomyopathy 12

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Nov 17, 2023	This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 50 of the CSRP3 protein (p.Ala50Thr). This variant is present in population databases (rs145300736, gnomAD 0.01%). This missense change has been observed in individual(s) with dilated cardiomyopathy (PMID: 20474083, 27532257). ClinVar contains an entry for this variant (Variation ID: 44687). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Aug 31, 2021	- -

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Mar 08, 2022	- -

CSRP3-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 24, 2024

The CSRP3 c.148G>A variant is predicted to result in the amino acid substitution p.Ala50Thr. This variant was reported in individuals with dilated cardiomyopathy (Zimmerman et al. 2010. PubMed ID: 20474083; Table S1B, Walsh et al. 2016. PubMed ID: 27532257) and also documented in the general population (Andreasen et al. 2013. PubMed ID: 23299917). This variant is reported in 0.010% of alleles in individuals of East Asian descent in gnomAD and is interpreted as a variant of uncertain significance in ClinVar (https://www.ncbi.nlm.nih.gov/clinvar/variation/44687). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Aug 23, 2011

Variant classified as Uncertain Significance - Favor Benign. The Ala50Thr varian t has not been identified in 1 individual with DCM out of >350 Caucasian individ uals tested and was absent from 344 Caucasian and 376 Black control chromosomes tested by our laboratory (Zimmerman 2010). Alanine (Ala) at position 50 is highl y conserved across evolutionarily distant species, suggesting that a change may negatively impact the protein's function, though fruitfly carries a threonine (t he same amino acid as this variant) and C. elegans carries a cystine. While cons ervation and absence in controls support a pathogenic role of the Ala50Thr varia nt, it was absent in an affected family member, which raises the possibility tha t it is benign. In summary, additional data is needed to clarify the clinical s ignificance of this variant. -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 03, 2021

The c.148G>A (p.A50T) alteration is located in exon 3 (coding exon 2) of the CSRP3 gene. This alteration results from a G to A substitution at nucleotide position 148, causing the alanine (A) at amino acid position 50 to be replaced by a threonine (T). 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

Uncertain

0.41

BayesDel_addAF

Pathogenic

0.17

BayesDel_noAF

Pathogenic

0.24

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.45

T;.;T;T

Eigen

Benign

0.063

Eigen_PC

Benign

0.095

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.94

.;D;.;D

M_CAP

Uncertain

0.093

MetaRNN

Uncertain

0.57

D;D;D;D

MetaSVM

Uncertain

0.21

MutationAssessor

Benign

1.3

L;.;L;L

PrimateAI

Uncertain

0.79

PROVEAN

Benign

-0.060

N;.;.;N

REVEL

Uncertain

0.57

Sift

Benign

0.34

T;.;.;T

Sift4G

Benign

0.19

T;.;.;T

Polyphen

0.58

P;.;P;P

Vest4

0.83

MVP

0.90

MPC

0.070

ClinPred

0.094

GERP RS

5.6

Varity_R

0.23

gMVP

0.55

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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