rs199728019

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM1PP3BP6

The NM_000256.3(MYBPC3):c.1786G>A(p.Gly596Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000048 in 1,561,638 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 Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000046 ( 0 hom. )

Consequence

MYBPC3
NM_000256.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:9B:3

Conservation

PhyloP100: 7.53

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.

PM1

In a domain Ig-like C2-type 4 (size 89) in uniprot entity MYPC3_HUMAN there are 31 pathogenic changes around while only 3 benign (91%) in NM_000256.3

PP3

MetaRNN computational evidence supports a deleterious effect, 0.755

BP6

Variant 11-47341995-C-T is Benign according to our data. Variant chr11-47341995-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 42566.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=8, Benign=1, Likely_benign=2}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYBPC3	NM_000256.3 link	c.1786G>A	p.Gly596Arg	missense_variant	Exon 18 of 35	ENST00000545968.6	NP_000247.2	Q14896-1A5YM48

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
MYBPC3	ENST00000545968.6 link	c.1786G>A	p.Gly596Arg	missense_variant	Exon 18 of 35	5	NM_000256.3	ENSP00000442795.1	Q14896-1
MYBPC3	ENST00000399249.6 link	c.1786G>A	p.Gly596Arg	missense_variant	Exon 17 of 34	5		ENSP00000382193.2	A8MXZ9
MYBPC3	ENST00000544791.1 link	n.1786G>A		non_coding_transcript_exon_variant	Exon 18 of 27	5		ENSP00000444259.1	F5GZR4

Frequencies

GnomAD3 genomes

AF:

0.0000657

AC:

AN:

152206

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00115

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:

0.000116

AC:

AN:

172158

Hom.:

AF XY:

0.0000657

AC XY:

AN XY:

91262

show subpopulations

Gnomad AFR exome

AF:

0.000104

Gnomad AMR exome

AF:

0.000117

Gnomad ASJ exome

AF:

0.00159

Gnomad EAS exome

AF:

0.0000838

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000209

GnomAD4 exome

AF:

0.0000461

AC:

AN:

1409432

Hom.:

Cov.:

AF XY:

0.0000531

AC XY:

AN XY:

696172

show subpopulations

Gnomad4 AFR exome

AF:

0.0000311

Gnomad4 AMR exome

AF:

0.000138

Gnomad4 ASJ exome

AF:

0.00158

Gnomad4 EAS exome

AF:

0.0000274

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000553

Gnomad4 OTH exome

AF:

0.000205

GnomAD4 genome

AF:

0.0000657

AC:

AN:

152206

Hom.:

Cov.:

AF XY:

0.0000807

AC XY:

AN XY:

74358

show subpopulations

Gnomad4 AFR

AF:

0.0000965

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00115

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:

0.000125

Hom.:

Bravo

AF:

0.000106

ESP6500AA

AF:

0.000238

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000590

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:9Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:2

Jan 21, 2013

Stanford Center for Inherited Cardiovascular Disease, Stanford University

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

Note this variant was found in clinical genetic testing performed by one or more labs who may also submit to ClinVar. Thus any internal case data may overlap with the internal case data of other labs. The interpretation reviewed below is that of the Stanford Center for Inherited Cardiovascular Disease -

Apr 10, 2018

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

proposed classification - variant undergoing re-assessment, contact laboratory -

Cardiomyopathy

Uncertain:2

Dec 16, 2022

Color Diagnostics, LLC DBA Color Health

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This missense variant replaces glycine with arginine at codon 596 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 reported for this variant. This variant has been reported in several individuals affected with hypertrophic cardiomyopathy (PMID: 21511876, 25351510, 25558701), dilated cardiomyopathy (PMID: 32746448), or sudden death (PMID: 27930701). This variant has been identified in 21/203560 chromosomes in the general population by the Genome Aggregation Database (gnomAD). Although the elevated allele frequency in the general population suggests that this variant may not be disease-causing, additional studies are necessary to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -

May 30, 2018

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Uncertain:2

Oct 15, 2024

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Reported in several unrelated individuals with HCM and one adult individual with unexplained sudden death in the published literature (Chung et al. (2007) Progress In Pediatric Cardiology 23 :33-38; PMID: 21511876, 25611685, 25351510, 28166282); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Functional studies suggest p.(G596R) appears to shift the balance of MYBPC3 interaction from actin to myosin (PMID: 38042491); This variant is associated with the following publications: (PMID: 25611685, 25351510, 28166282, 28518168, 25558701, 32746448, 16267253, 27930701, 33495597, 38042491, 32841044, 35130036, 37652022, 32461654, 21511876) -

Dec 29, 2020

Mayo Clinic Laboratories, Mayo Clinic

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Left ventricular noncompaction 10

Uncertain:1Benign:1

Apr 19, 2019

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases was too high to be consistent with this variant causing disease. Therefore, this variant is classified as benign. -

Dec 07, 2022

Servicio Canario de Salud, Hospital Universitario Nuestra Sra. de Candelaria

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1786G>A (p.Gly596Arg) MYBPC3 variant has been reported in our laboratory in a 59-year-old female patient with a clinical diagnosis of non-compaction dilated cardiomyopathy, with severe left ventricular dysfunction and with defibrillator. A nephew who died of sudden death at 45 years of age. This variant has been reported in several individuals affected with hypertrophic cardiomyopathy (PMID: 21511876, 25351510, 25558701). This variant is present in population databases (gnomAD allele frequency 0.0001032). ClinVar contains an entry for this variant (Variation ID: 42566). In silico analysis (CADD, PolyPhen-2, MutationTaster, SIFT y Provean) supports that this missense variant has a deleterious effect on protein structure/function, but this prediction has not been confirmed by functional studies. In summary, the available evidence for c.1054A>G (p.Arg352Gly) TP63 variant is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Hypertrophic cardiomyopathy

Uncertain:1Benign:1

Sep 23, 2024

All of Us Research Program, National Institutes of Health

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This missense variant replaces glycine with arginine at codon 596 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 reported for this variant. This variant has been reported in several individuals affected with hypertrophic cardiomyopathy (PMID: 21511876, 25351510, 25558701), dilated cardiomyopathy (PMID: 32746448), or sudden death (PMID: 27930701). This variant has also been identified in 21/203560 chromosomes (14/9070 Ashkenazi Jewish chromosomes) in the general population by the Genome Aggregation Database (gnomAD). Although the elevated allele frequency in the general population suggests that this variant may not be disease-causing, additional studies are necessary to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Primary familial hypertrophic cardiomyopathy

Pathogenic:1

Oct 31, 2014

Blueprint Genetics

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Hypertrophic cardiomyopathy 4

Uncertain:1

Apr 19, 2019

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. However, the evidence from the literature, in combination with allele frequency data from public databases where available, was not sufficient to rule this variant in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

Cardiovascular phenotype

Benign:1

May 14, 2024

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.64

CardioboostCm

Uncertain

0.25

BayesDel_addAF

Pathogenic

0.26

BayesDel_noAF

Pathogenic

0.35

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.76

D;T;T

Eigen

Pathogenic

0.90

Eigen_PC

Pathogenic

0.84

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.99

D;D;D

M_CAP

Pathogenic

0.58

MetaRNN

Pathogenic

0.76

D;D;D

MetaSVM

Uncertain

0.59

MutationAssessor

Pathogenic

3.2

M;.;.

PrimateAI

Uncertain

0.77

PROVEAN

Pathogenic

-6.5

D;.;D

REVEL

Pathogenic

0.86

Sift

Uncertain

0.0010

D;.;D

Sift4G

Pathogenic

0.0010

D;D;D

Vest4

0.89

MVP

0.95

MPC

0.90

ClinPred

0.74

GERP RS

5.1

Varity_R

0.75

gMVP

0.88

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