chr11-47349782-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 2P and 9B. PM1BP4_StrongBP6BS2

The NM_000256.3(MYBPC3):c.646G>A(p.Ala216Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000255 in 1,605,254 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. A216A) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00075 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00020 ( 2 hom. )

Consequence

MYBPC3
NM_000256.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:15

Conservation

PhyloP100: 0.698

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 Benign. Variant got -7 ACMG points.

PM1

In a domain Ig-like C2-type 1 (size 103) in uniprot entity MYPC3_HUMAN there are 30 pathogenic changes around while only 10 benign (75%) in NM_000256.3

BP4

Computational evidence support a benign effect (MetaRNN=0.007139623).

BP6

Variant 11-47349782-C-T is Benign according to our data. Variant chr11-47349782-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 42779.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=2, Benign=2, Likely_benign=8}. Variant chr11-47349782-C-T is described in Lovd as [Likely_benign].

BS2

High Homozygotes in GnomAdExome4 at 2 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYBPC3	NM_000256.3 link	c.646G>A	p.Ala216Thr	missense_variant	Exon 5 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.646G>A	p.Ala216Thr	missense_variant	Exon 5 of 35	5	NM_000256.3	ENSP00000442795.1	Q14896-1
MYBPC3	ENST00000399249.6 link	c.646G>A	p.Ala216Thr	missense_variant	Exon 5 of 34	5		ENSP00000382193.2	A8MXZ9
MYBPC3	ENST00000544791.1 link	n.646G>A		non_coding_transcript_exon_variant	Exon 5 of 27	5		ENSP00000444259.1	F5GZR4

Frequencies

GnomAD3 genomes

AF:

0.000742

AC:

113

AN:

152246

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00188

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000785

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000294

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000375

AC:

AN:

240270

Hom.:

AF XY:

0.000335

AC XY:

AN XY:

131246

show subpopulations

Gnomad AFR exome

AF:

0.00266

Gnomad AMR exome

AF:

0.000700

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000993

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000189

Gnomad OTH exome

AF:

0.000336

GnomAD4 exome

AF:

0.000203

AC:

295

AN:

1452890

Hom.:

Cov.:

AF XY:

0.000192

AC XY:

139

AN XY:

723034

show subpopulations

Gnomad4 AFR exome

AF:

0.00161

Gnomad4 AMR exome

AF:

0.000695

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000931

Gnomad4 FIN exome

AF:

0.0000438

Gnomad4 NFE exome

AF:

0.000147

Gnomad4 OTH exome

AF:

0.000398

GnomAD4 genome

AF:

0.000748

AC:

114

AN:

152364

Hom.:

Cov.:

AF XY:

0.000859

AC XY:

AN XY:

74502

show subpopulations

Gnomad4 AFR

AF:

0.00195

Gnomad4 AMR

AF:

0.000784

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000265

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000269

Hom.:

Bravo

AF:

0.000937

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.00145

AC:

ESP6500EA

AF:

0.000119

AC:

ExAC

AF:

0.000347

AC:

Asia WGS

AF:

0.00115

AC:

AN:

3478

EpiCase

AF:

0.000273

EpiControl

AF:

0.000119

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:15

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Benign:6

Clinical Genetics, Academic Medical Center

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Aug 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

MYBPC3: BP4 -

Feb 11, 2025

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

See Variant Classification Assertion Criteria. -

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Primary familial hypertrophic cardiomyopathy

Uncertain:2

Jun 01, 2014

CSER _CC_NCGL, University of Washington

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: research

Low GERP score may suggest that this variant may belong in a lower pathogenicity class -

Dec 20, 2016

Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified

Benign:2

Aug 22, 2016

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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

Jun 21, 2021

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: MYBPC3 c.646G>A (p.Ala216Thr) results in a non-conservative amino acid change located in the Immunoglobulin subtype domain (IPR003599) of the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00037 in 240462 control chromosomes, predominantly at a frequency of 0.0027 within the African or African-American subpopulation in the gnomAD database. The observed variant frequency within African or African-American control individuals in the gnomAD database is approximately 3 fold of the estimated maximal expected allele frequency for a pathogenic variant in MYBPC3 causing Cardiomyopathy phenotype (0.001), strongly suggesting that the variant is a benign polymorphism found primarily in populations of African or African-American origin. c.646G>A has been reported in the literature in individuals affected with Cardiomyopathy however, without strong evidence for pathogenicity (example: Bick_2012, Pugh_2014). Co-occurrence with another pathogenic variant has been reported (MYBPC3 c.772G>A , p.E258K), providing supporting evidence for a benign role (Nunez_2013). To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Seven other ClinVar submitters (evaluation after 2014) cite the variant as likely benign (n=6) or uncertain significance (n=1). Based on the evidence outlined above, the variant was classified as likely benign. -

Cardiomyopathy

Benign:2

Apr 07, 2018

Color Diagnostics, LLC DBA Color Health

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jun 02, 2023

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

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hypertrophic cardiomyopathy

Benign:2

Jan 26, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Sep 27, 2022

Cohesion Phenomics

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Left ventricular noncompaction 10

Benign:1

Aug 14, 2019

Illumina Laboratory Services, Illumina

Significance: Likely 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). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to determine this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

Hypertrophic cardiomyopathy 4

Benign:1

Aug 14, 2019

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Cardiovascular phenotype

Benign:1

Aug 27, 2018

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

Benign

0.13

CardioboostCm

Benign

0.00089

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.27

CADD

Benign

DANN

Benign

0.39

DEOGEN2

Benign

0.11

T;T;T

Eigen

Benign

-0.82

Eigen_PC

Benign

-0.81

FATHMM_MKL

Benign

0.12

LIST_S2

Benign

0.70

T;T;T

M_CAP

Benign

0.051

MetaRNN

Benign

0.0071

T;T;T

MetaSVM

Benign

-0.94

MutationAssessor

Benign

0.85

L;.;.

PrimateAI

Benign

0.32

PROVEAN

Benign

0.13

N;N;N

REVEL

Uncertain

0.36

Sift

Benign

0.51

T;T;T

Sift4G

Benign

0.66

T;T;T

Polyphen

0.0

B;.;.

Vest4

0.15

MVP

0.71

MPC

0.21

ClinPred

0.0022

GERP RS

-1.1

Varity_R

0.071

gMVP

0.63

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