rs730880623

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PP3_Moderate

The NM_000256.3(MYBPC3):c.604A>C(p.Lys202Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000515 in 1,611,404 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 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. K202R) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000051 ( 0 hom. )

Consequence

MYBPC3
NM_000256.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:9

Conservation

PhyloP100: 8.01

Variant links:

Genes affected

MYBPC3 (HGNC:7551): (myosin binding protein C3) MYBPC3 encodes the cardiac isoform of myosin-binding protein C. Myosin-binding protein C is a myosin-associated protein found in the cross-bridge-bearing zone (C region) of A bands in striated muscle. MYBPC3 is expressed exclusively in heart muscle and is a key regulator of cardiac contraction. Mutations in this gene are a frequent cause of familial hypertrophic cardiomyopathy. [provided by RefSeq, May 2022]

MYBPC3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.869

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYBPC3	NM_000256.3 linkuse as main transcript	c.604A>C	p.Lys202Gln	missense_variant	5/35	ENST00000545968.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYBPC3	ENST00000545968.6 linkuse as main transcript	c.604A>C	p.Lys202Gln	missense_variant	5/35	5	NM_000256.3	P4	Q14896-1
MYBPC3	ENST00000399249.6 linkuse as main transcript	c.604A>C	p.Lys202Gln	missense_variant	5/34	5		A2
MYBPC3	ENST00000544791.1 linkuse as main transcript	c.604A>C	p.Lys202Gln	missense_variant, NMD_transcript_variant	5/27	5

Frequencies

GnomAD3 genomes

AF:

0.0000591

AC:

AN:

152268

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:

0.000132

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000367

AC:

AN:

245380

Hom.:

AF XY:

0.0000449

AC XY:

AN XY:

133700

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:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000805

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000507

AC:

AN:

1459136

Hom.:

Cov.:

AF XY:

0.0000482

AC XY:

AN XY:

725960

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000657

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152268

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74394

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:

0.000132

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000970

Hom.:

Bravo

AF:

0.0000491

ExAC

AF:

0.0000413

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:9

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Apr 05, 2019	The p.Lys202Gln variant in MYBPC3 has been reported in 1 individual with DCM. This variant has also been identified in 5/62340 European chromosomes by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.org; dbSNP rs730880623). Computational prediction tools and conservation analysis suggest that the variant may impact the protein, though this information is not predictive enough to determine pathogenicity. In summary, the clinical significance of the p.Lys202Gln variant is uncertain. -
Uncertain significance, criteria provided, single submitter	clinical testing	AiLife Diagnostics, AiLife Diagnostics	Apr 24, 2021	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Aug 13, 2021	Reported in association with DCM in the published literature (Hershberger et al., 2010; Ito et al., 2017; Ramchand et al., 2020; Mazzaroatto et al., 2020) and in a participant in the Framington Heart Study (Bick et al., 2012); Reported in ClinVar (ClinVar Variant ID# 181046; ClinVar); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 22958901, 20215591, 31931689, 28679633, 31983221) -

Hypertrophic cardiomyopathy

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	All of Us Research Program, National Institutes of Health	Jan 11, 2024	This missense variant replaces lysine with glutamine at codon 202 of the MYBPC3 protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). To our knowledge, functional studies have not been performed for this variant. This variant has been reported in two individuals affected with dilated cardiomyopathy (PMID: 20215591, 31983221). This variant has also been identified in 10/276772 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Oct 22, 2023	This sequence change replaces lysine, which is basic and polar, with glutamine, which is neutral and polar, at codon 202 of the MYBPC3 protein (p.Lys202Gln). This variant is present in population databases (rs730880623, gnomAD 0.008%). This missense change has been observed in individual(s) with dilated cardiomyopathy (PMID: 20215591, 31931689, 31983221). ClinVar contains an entry for this variant (Variation ID: 181046). 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 disruptive. 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. -

Cardiomyopathy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Color Diagnostics, LLC DBA Color Health

May 12, 2023

This missense variant replaces lysine with glutamine at codon 202 of the MYBPC3 protein. Computational prediction suggests that this variant may have a deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in two individuals affected with dilated cardiomyopathy (PMID: 20215591, 31983221). This variant has been identified in 10/276772 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -

Dilated cardiomyopathy 1A

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genomic Diagnostic Laboratory, Division of Genomic Diagnostics, Children's Hospital of Philadelphia

May 11, 2015

- -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 14, 2022

The p.K202Q variant (also known as c.604A>C), located in coding exon 5 of the MYBPC3 gene, results from an A to C substitution at nucleotide position 604. The lysine at codon 202 is replaced by glutamine, an amino acid with similar properties. This alteration has been detected in dilated cardiomyopathy (DCM) cohorts; however, clinical details were limited (Hershberger RE et al. Circ Cardiovasc Genet. 2010;3:155-61; Mazzarotto F et al. Circulation, 2020 02;141:387-398; Ramchand J et al. J Am Heart Assoc, 2020 01;9:e013346). This variant has also been identified in individuals without overt clinical features of DCM (Bick AG et al. Am. J. Hum. Genet. 2012;91:513-9). This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

MYBPC3-related disorder

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Sep 28, 2022

The MYBPC3 c.604A>C variant is predicted to result in the amino acid substitution p.Lys202Gln. This variant has been reported in individuals with dilated cardiomyopathy (Hershberger et al. 2010. PubMed ID: 20215591; Dataset S6, Ito et al. 2017. PubMed ID: 28679633; Table S3, Mazzarotto et al. 2020. PubMed ID: 31983221; Table S2, Bick et al. 2012. PubMed ID: 22958901; Table S4, Ramchand et al. 2020. PubMed ID: 31931689). This variant is reported in 0.0079% of alleles in individuals of European (Non-Finnish) descent in gnomAD (http://gnomad.broadinstitute.org/variant/11-47371375-T-G). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

CardioboostCm

Uncertain

0.54

BayesDel_addAF

Benign

-0.012

BayesDel_noAF

Uncertain

-0.060

Cadd

Uncertain

Dann

Uncertain

0.99

DEOGEN2

Uncertain

0.58

D;T;T

Eigen

Pathogenic

0.80

Eigen_PC

Pathogenic

0.73

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Pathogenic

1.0

D;D;D

M_CAP

Uncertain

0.21

MetaRNN

Pathogenic

0.87

D;D;D

MetaSVM

Uncertain

0.21

MutationAssessor

Uncertain

2.6

M;.;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.66

PROVEAN

Uncertain

-3.5

D;D;D

REVEL

Pathogenic

0.79

Sift

Uncertain

0.0020

D;D;D

Sift4G

Uncertain

0.0020

D;D;D

Polyphen

1.0

D;.;.

Vest4

0.82

MVP

0.91

MPC

0.86

ClinPred

0.66

GERP RS

4.8

Varity_R

0.76

gMVP

0.73

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