NM_000256.3:c.710A>G

Variant names:

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM1PM2PM5PP3_StrongPP5_Moderate

The NM_000256.3(MYBPC3):c.710A>G(p.Tyr237Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,266 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 Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Y237S) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 30)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

MYBPC3
NM_000256.3 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 7.97

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:

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ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 12 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

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr11-47348486-T-G is described in Lovd as [Likely_pathogenic].

PP3

MetaRNN computational evidence supports a deleterious effect, 0.988

PP5

Variant 11-47348486-T-C is Pathogenic according to our data. Variant chr11-47348486-T-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2496735.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr11-47348486-T-C is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYBPC3	NM_000256.3 link	c.710A>G	p.Tyr237Cys	missense_variant	Exon 6 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.710A>G	p.Tyr237Cys	missense_variant	Exon 6 of 35	5	NM_000256.3	ENSP00000442795.1	Q14896-1
MYBPC3	ENST00000399249.6 link	c.710A>G	p.Tyr237Cys	missense_variant	Exon 6 of 34	5		ENSP00000382193.2	A8MXZ9
MYBPC3	ENST00000544791.1 link	n.710A>G		non_coding_transcript_exon_variant	Exon 6 of 27	5		ENSP00000444259.1	F5GZR4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461266

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726886

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Cardiovascular phenotype

Pathogenic:1

Nov 22, 2022

Ambry Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Y237C variant (also known as c.710A>G), located in coding exon 6 of the MYBPC3 gene, results from an A to G substitution at nucleotide position 710. The tyrosine at codon 237 is replaced by cysteine, an amino acid with highly dissimilar properties. This alteration has been reported in association with hypertrophic cardiomyopathy (HCM) (Coto E et al. J Mol Diagn, 2012 Sep;14:518-24; García-Castro M et al. Rev Esp Cardiol, 2009 Jan;62:48-56: Ambry internal data). This variant is considered to be rare based on population cohorts in the Genome Aggregation Database (gnomAD). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the majority of available evidence to date, this variant is likely to be pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.84

CardioboostCm

Uncertain

0.39

BayesDel_addAF

Pathogenic

0.51

BayesDel_noAF

Pathogenic

0.49

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.87

D;T;T

Eigen

Pathogenic

0.80

Eigen_PC

Pathogenic

0.73

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.96

D;D;D

M_CAP

Pathogenic

0.42

MetaRNN

Pathogenic

0.99

D;D;D

MetaSVM

Pathogenic

0.90

MutationAssessor

Uncertain

2.6

M;.;.

PrimateAI

Uncertain

0.62

PROVEAN

Pathogenic

-7.8

D;D;D

REVEL

Pathogenic

0.94

Sift

Pathogenic

0.0

D;D;D

Sift4G

Pathogenic

0.0

D;D;D

Polyphen

1.0

D;.;.

Vest4

0.96

MutPred

0.98

Loss of disorder (P = 0.2556);Loss of disorder (P = 0.2556);Loss of disorder (P = 0.2556);

MVP

0.97

MPC

0.93

ClinPred

1.0

GERP RS

5.1

Varity_R

0.84

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

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over