rs376736293

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM1PM5BP4_Moderate

The NM_000256.3(MYBPC3):c.1813G>A(p.Asp605Asn) variant causes a missense change. The variant allele was found at a frequency of 0.000103 in 1,593,218 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D605G) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00019 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000094 ( 0 hom. )

Consequence

MYBPC3
NM_000256.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:6B:5

Conservation

PhyloP100: 5.76

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 hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 12 uncertain in NM_000256.3

PM5

Other missense variant is known to change same aminoacid residue: Variant chr11-47341221-T-C is described in Lovd as [Likely_pathogenic].

BP4

Computational evidence support a benign effect (MetaRNN=0.077186525).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYBPC3	NM_000256.3 linkuse as main transcript	c.1813G>A	p.Asp605Asn	missense_variant	19/35	ENST00000545968.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYBPC3	ENST00000545968.6 linkuse as main transcript	c.1813G>A	p.Asp605Asn	missense_variant	19/35	5	NM_000256.3	P4	Q14896-1
MYBPC3	ENST00000399249.6 linkuse as main transcript	c.1813G>A	p.Asp605Asn	missense_variant	18/34	5		A2
MYBPC3	ENST00000544791.1 linkuse as main transcript	c.1813G>A	p.Asp605Asn	missense_variant, NMD_transcript_variant	19/27	5

Frequencies

GnomAD3 genomes

AF:

0.000191

AC:

AN:

152190

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000338

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00317

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000198

AC:

AN:

212574

Hom.:

AF XY:

0.000165

AC XY:

AN XY:

114884

show subpopulations

Gnomad AFR exome

AF:

0.0000817

Gnomad AMR exome

AF:

0.0000328

Gnomad ASJ exome

AF:

0.00353

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000529

Gnomad OTH exome

AF:

0.000371

GnomAD4 exome

AF:

0.0000937

AC:

135

AN:

1441028

Hom.:

Cov.:

AF XY:

0.0000825

AC XY:

AN XY:

714748

show subpopulations

Gnomad4 AFR exome

AF:

0.0000908

Gnomad4 AMR exome

AF:

0.0000240

Gnomad4 ASJ exome

AF:

0.00354

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000181

Gnomad4 OTH exome

AF:

0.000335

GnomAD4 genome

AF:

0.000191

AC:

AN:

152190

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74344

show subpopulations

Gnomad4 AFR

AF:

0.000338

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00317

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000362

Hom.:

Bravo

AF:

0.000174

ESP6500AA

AF:

0.000249

AC:

ESP6500EA

AF:

0.000360

AC:

ExAC

AF:

0.0000995

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:6Benign:5

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2

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	Clinical Genetics, Academic Medical Center	-	- -

Cardiomyopathy

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario	Mar 04, 2022	- -
Likely benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Aug 13, 2018	- -

Hypertrophic cardiomyopathy

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Invitae	Jan 28, 2024	- -
Uncertain significance, criteria provided, single submitter	research	Biesecker Lab/Clinical Genomics Section, National Institutes of Health	Jun 24, 2013	- -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

May 21, 2018

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

Hypertrophic cardiomyopathy 4

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 28, 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. -

MYBPC3-related condition

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

May 18, 2020

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Left ventricular noncompaction 10

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 28, 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 was too high to be consistent with this variant causing disease. Therefore, this variant is classified as benign. -

Cardiovascular phenotype

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 02, 2019

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

Benign

0.16

CardioboostCm

Benign

0.064

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.41

Cadd

Uncertain

Dann

Uncertain

1.0

DEOGEN2

Benign

0.29

T;T;T

Eigen

Benign

0.048

Eigen_PC

Benign

0.21

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.96

D;D;D

M_CAP

Uncertain

0.14

MetaRNN

Benign

0.077

T;T;T

MetaSVM

Benign

-0.70

MutationAssessor

Benign

0.69

N;.;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.68

PROVEAN

Benign

-2.2

N;.;N

REVEL

Benign

0.26

Sift

Benign

0.47

T;.;T

Sift4G

Benign

0.16

T;T;T

Vest4

0.74

MVP

0.84

MPC

0.63

ClinPred

0.084

GERP RS

4.6

Varity_R

0.27

gMVP

0.70

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