chr11-47350048-G-A

Position:

• chr11-47350048-G-A

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BP4_Moderate BP6 BP7

The NM_000256.3(MYBPC3):​c.471C>T​(p.Phe157=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000366 in 1,564,150 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).

• Frequency:
  • Genomes: 𝑓 0.00034 (0 hom., cov: 33)
  • Exomes 𝑓: 0.00037 (0 hom.)
• Consequence: MYBPC3 NM_000256.3 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3 B:13
• Conservation: PhyloP100: 0.409

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 Likely_benign. Variant got -4 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.43).
• BP6: Variant 11-47350048-G-A is Benign according to our data. Variant chr11-47350048-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 42757.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=6, Benign=2, Uncertain_significance=3}. Variant chr11-47350048-G-A is described in Lovd as [Benign]. Variant chr11-47350048-G-A is described in Lovd as [Likely_benign].
• BP7: Synonymous conserved (PhyloP=0.409 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYBPC3	NM_000256.3	c.471C>T	p.Phe157=	synonymous_variant	4/35	ENST00000545968.6	NP_000247.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MYBPC3	ENST00000545968.6	c.471C>T	p.Phe157=	synonymous_variant	4/35	5	NM_000256.3	ENSP00000442795	P4
MYBPC3	ENST00000399249.6	c.471C>T	p.Phe157=	synonymous_variant	4/34	5		ENSP00000382193	A2
MYBPC3	ENST00000544791.1	c.471C>T	p.Phe157=	synonymous_variant, NMD_transcript_variant	4/27	5		ENSP00000444259

Frequencies

GnomAD3 genomes AF: 0.000342 AC: 52 AN: 152100 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000966

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000386

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.000661

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000529

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000411 AC: 72 AN: 175022 Hom.: 0 AF XY: 0.000513 AC XY: 48 AN XY: 93498

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000376

Gnomad ASJ exome AF: 0.000114

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000296

Gnomad FIN exome AF: 0.000290

Gnomad NFE exome AF: 0.000792

Gnomad OTH exome AF: 0.000211

GnomAD4 exome AF: 0.000369 AC: 521 AN: 1411932 Hom.: 0 Cov.: 35 AF XY: 0.000393 AC XY: 274 AN XY: 697724

Gnomad4 AFR exome AF: 0.0000933

Gnomad4 AMR exome AF: 0.000107

Gnomad4 ASJ exome AF: 0.000237

Gnomad4 EAS exome AF: 0.0000545

Gnomad4 SAS exome AF: 0.000699

Gnomad4 FIN exome AF: 0.000460

Gnomad4 NFE exome AF: 0.000372

Gnomad4 OTH exome AF: 0.000342

GnomAD4 genome AF: 0.000342 AC: 52 AN: 152218 Hom.: 0 Cov.: 33 AF XY: 0.000430 AC XY: 32 AN XY: 74424

Gnomad4 AFR AF: 0.0000963

Gnomad4 AMR AF: 0.000131

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000387

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.000661

Gnomad4 NFE AF: 0.000529

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000442 Hom.: 0

Bravo AF: 0.000291

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3 Benign:13

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Benign:5

Likely benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Aug 01, 2023	MYBPC3: BP4, BP7 -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Likely benign, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -

not specified Benign:4

Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Aug 30, 2020	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Likely benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Aug 17, 2010	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	May 14, 2012	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 Uncertain:1 Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jun 14, 2016	- -
Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 15, 2024	- -

Cardiomyopathy Benign:2

Likely benign, criteria provided, single submitter	clinical testing	CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario	Mar 06, 2023	- -
Likely benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Jul 09, 2018	- -

Dilated Cardiomyopathy, Dominant Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Left ventricular noncompaction cardiomyopathy Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Cardiovascular phenotype Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

May 23, 2023

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	-0.43
CADD	Benign	12
DANN	Benign	0.73

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs150291001; hg19: chr11-47371599;