11-47347891-C-T

Position:

chr11-47347891-C-T

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BP4

The NM_000256.3(MYBPC3):c.787G>A(p.Gly263Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000572 in 1,572,982 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000056 ( 1 hom. )

Consequence

MYBPC3
NM_000256.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:16

Conservation

PhyloP100: 3.44

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 Likely_benign. Variant got -1 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.2798164).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYBPC3	NM_000256.3 linkuse as main transcript	c.787G>A	p.Gly263Arg	missense_variant	7/35	ENST00000545968.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYBPC3	ENST00000545968.6 linkuse as main transcript	c.787G>A	p.Gly263Arg	missense_variant	7/35	5	NM_000256.3	P4	Q14896-1
MYBPC3	ENST00000399249.6 linkuse as main transcript	c.787G>A	p.Gly263Arg	missense_variant	7/34	5		A2
MYBPC3	ENST00000544791.1 linkuse as main transcript	c.787G>A	p.Gly263Arg	missense_variant, NMD_transcript_variant	7/27	5

Frequencies

GnomAD3 genomes

AF:

0.0000657

AC:

AN:

152180

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:

0.000770

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.0000926

AC:

AN:

183508

Hom.:

AF XY:

0.000112

AC XY:

AN XY:

98610

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000531

Gnomad SAS exome

AF:

0.000166

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000509

Gnomad OTH exome

AF:

0.000406

GnomAD4 exome

AF:

0.0000563

AC:

AN:

1420684

Hom.:

Cov.:

AF XY:

0.0000612

AC XY:

AN XY:

702726

show subpopulations

Gnomad4 AFR exome

AF:

0.000154

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000268

Gnomad4 SAS exome

AF:

0.000298

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000366

Gnomad4 OTH exome

AF:

0.0000170

GnomAD4 genome

AF:

0.0000657

AC:

AN:

152298

Hom.:

Cov.:

AF XY:

0.0000671

AC XY:

AN XY:

74464

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000771

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.0000665

Hom.:

Bravo

AF:

0.0000642

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000123

AC:

ExAC

AF:

0.0000596

AC:

Asia WGS

AF:

0.00115

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:16

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:5

Uncertain significance, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Uncertain significance, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Uncertain significance, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Uncertain significance, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	May 27, 2016	A variant of uncertain significance has been identified in the MYBPC3 gene. The Gly263Arg variant has been reported as a de novo variant in one patient with HCM and was absent from 120 control individuals; however, functional studies and detailed clinical information were not provided. It was not observed with any significant frequency in approximately 6,000 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project10, indicating it is not a common benign variant in these populations. The Gly263Arg variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. However, this substitution occurs at a position that is not conserved across species and in silico analysis predicts this variant likely does not alter the protein structure/function. -

Hypertrophic cardiomyopathy 4;C3715165:Left ventricular noncompaction 10

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Oct 25, 2021	- -
Uncertain significance, criteria provided, single submitter	clinical testing	New York Genome Center	Apr 22, 2022	- -

Cardiomyopathy

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario	May 30, 2023	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	May 11, 2023	This missense variant replaces glycine with arginine at codon 263 of the MYBPC3 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in individuals affected with hypertrophic cardiomyopathy (PMID: 15563892, 32841044, 33495597, 33782553), and in one instance has been reported to occur de novo (PMID: 15563892). It has also been reported in anindividual affected with sudden death (PMID: 27707468). This variant has been identified in 18/214866 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. -

Hypertrophic cardiomyopathy 4

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Mendelics	May 28, 2019	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Apr 27, 2017	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. -

Hypertrophic cardiomyopathy

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	All of Us Research Program, National Institutes of Health	Feb 05, 2024	This missense variant replaces glycine with arginine at codon 263 of the MYBPC3 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in individuals affected with hypertrophic cardiomyopathy (PMID: 15563892, 32841044, 33495597, 33782553), and in one instance has been reported to occur de novo (PMID: 15563892). It has also been reported in anindividual affected with sudden death (PMID: 27707468). This variant has been identified in 18/214866 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 13, 2022	This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 263 of the MYBPC3 protein (p.Gly263Arg). This variant is present in population databases (rs373730381, gnomAD 0.05%), and has an allele count higher than expected for a pathogenic variant. This missense change has been observed in individual(s) with MYBPC3-related conditions (PMID: 15563892, 30847666). In at least one individual the variant was observed to be de novo. ClinVar contains an entry for this variant (Variation ID: 161315). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. 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. -

Left ventricular noncompaction 10

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 2017

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 did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

Primary familial hypertrophic cardiomyopathy

Uncertain:1

Uncertain significance, no assertion criteria provided

research

CSER _CC_NCGL, University of Washington

Jun 01, 2014

- -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 30, 2023

The p.G263R variant (also known as c.787G>A), located in coding exon 7 of the MYBPC3 gene, results from a G to A substitution at nucleotide position 787. The glycine at codon 263 is replaced by arginine, an amino acid with dissimilar properties. This alteration was reported as de novo in an individual with hypertrophic cardiomyopathy (Song L et al. Clin. Chim. Acta, 2005 Jan;351:209-16), as well in in other cardiomyopathy cohorts (Zou Y et al. Mol Biol Rep, 2013 Jun;40:3969-76; van Lint FHM et al. Neth Heart J, 2019 Jun;27:304-309; Magrì D et al. J Clin Med, 2020 May;9; Harper AR et al. Nat Genet, 2021 Feb;53:135-142). However, clinical details were limited. This alteration has also been reported in exome cohorts (Amendola LM et al. Genome Res., 2015 Mar;25:305-15). In addition, this alteration has been reported in ostensibly healthy individuals (Kapplinger JD et al. J Cardiovasc Transl Res, 2014 Apr;7:347-61; Kars ME et al. Proc Natl Acad Sci U S A, 2021 Sep;118). Based on data from gnomAD, the frequency for this variant is above the maximum credible frequency for a disease-causing variant in this gene based on internally established thresholds (Karczewski et al. Nature. 2020 May;581(7809):434-443; Whiffin et al. Genet Med. 2017 10;19:1151-1158). This amino acid position is not well 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.23

CardioboostCm

Benign

0.0021

BayesDel_addAF

Benign

-0.12

BayesDel_noAF

Uncertain

-0.080

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.28

T;T;T

Eigen

Benign

-0.21

Eigen_PC

Benign

-0.21

FATHMM_MKL

Benign

0.41

LIST_S2

Uncertain

0.89

D;D;D

M_CAP

Uncertain

0.099

MetaRNN

Benign

0.28

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.2

M;.;.

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Benign

0.45

PROVEAN

Benign

-2.0

N;N;N

REVEL

Benign

0.24

Sift

Benign

0.13

T;T;T

Sift4G

Benign

0.26

T;T;T

Polyphen

0.66

P;.;.

Vest4

0.83

MutPred

0.79

Loss of catalytic residue at G263 (P = 0.0382);Loss of catalytic residue at G263 (P = 0.0382);Loss of catalytic residue at G263 (P = 0.0382);

MVP

0.79

MPC

0.60

ClinPred

0.20

GERP RS

4.6

Varity_R

0.13

gMVP

0.42

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.11

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