rs377520770

chr11-47350069-G-Achr11-47350069-G-C

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_Strong BP6_Very_Strong BP7

The NM_000256.3(MYBPC3):c.450C>T(p.Pro150=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000858 in 1,561,618 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 Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. P150P) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.000092 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000085 (0 hom.)
• Consequence: MYBPC3 NM_000256.3 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7
• Conservation: PhyloP100: -0.411

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]

ACMG classification

Verdict is Benign. Variant got -13 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).
• BP6: Variant 11-47350069-G-A is Benign according to our data. Variant chr11-47350069-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 42753.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr11-47350069-G-A is described in Lovd as [Likely_benign].
• BP7: Synonymous conserved (PhyloP=-0.411 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYBPC3	NM_000256.3	c.450C>T	p.Pro150=	synonymous_variant	4/35	ENST00000545968.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYBPC3	ENST00000545968.6	c.450C>T	p.Pro150=	synonymous_variant	4/35	5	NM_000256.3	P4
MYBPC3	ENST00000399249.6	c.450C>T	p.Pro150=	synonymous_variant	4/34	5		A2
MYBPC3	ENST00000544791.1	c.450C>T	p.Pro150=	synonymous_variant, NMD_transcript_variant	4/27	5

Frequencies

GnomAD3 genomes AF: 0.0000920 AC: 14 AN: 152146 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.000121

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00116

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000294

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000141 AC: 24 AN: 170106 Hom.: 0 AF XY: 0.000110 AC XY: 10 AN XY: 90616

Gnomad AFR exome AF: 0.000439

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00124

Gnomad SAS exome AF: 0.0000855

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000435

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000851 AC: 120 AN: 1409354 Hom.: 0 Cov.: 35 AF XY: 0.0000776 AC XY: 54 AN XY: 696262

Gnomad4 AFR exome AF: 0.0000936

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000821

Gnomad4 SAS exome AF: 0.000188

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000609

Gnomad4 OTH exome AF: 0.000103

GnomAD4 genome AF: 0.0000919 AC: 14 AN: 152264 Hom.: 0 Cov.: 33 AF XY: 0.000107 AC XY: 8 AN XY: 74456

Gnomad4 AFR AF: 0.000120

Gnomad4 AMR AF: 0.0000654

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00116

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000294

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000761 Hom.: 0

Bravo AF: 0.000136

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:3

Likely benign, criteria provided, single submitter	clinical testing	Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute	Feb 13, 2020	- -
Likely benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Apr 04, 2012	Pro150Pro in exon 4 of MYBPC3: This variant is not expected to have clinical sig nificance because it does not alter an amino acid and is not located in the spli ce consensus sequence. This variant has been identified in 1/6698 European Ameri can chromosomes and 1/3314 African American chromosomes from a broad population by the NHLBI Exome Sequencing Project (http://evs.gs.washington.edu/EVS/). Pro1 50Pro in exon 4 of MYBPC3 (allele frequency = 1/6698) ** -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Feb 20, 2014	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Hypertrophic cardiomyopathy Benign:2

Likely benign, criteria provided, single submitter	clinical testing	All of Us Research Program, National Institutes of Health	Feb 05, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	Invitae	Jan 24, 2024	- -

Cardiomyopathy Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Color Diagnostics, LLC DBA Color Health

Apr 22, 2018

- -

Cardiovascular phenotype Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 16, 2015

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
BayesDel_noAF	Benign	-0.88
Cadd	Benign	0.038
Dann	Benign	0.89

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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

Other links and lift over

dbSNP: rs377520770; hg19: chr11-47371620;