11-47338684-G-A

Position:

• chr11-47338684-G-A

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP4_Strong BP6_Very_Strong BS2

The NM_000256.3(MYBPC3):​c.2149-5C>T variant causes a splice region, splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000568 in 1,607,440 control chromosomes in the GnomAD database, including 12 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.00041 (1 hom., cov: 32)
  • Exomes 𝑓: 0.00058 (11 hom.)
• Consequence: MYBPC3 NM_000256.3 splice_region, splice_polypyrimidine_tract, intron
• Scores: Splicing: ADA: 0.00001938
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:14
• Conservation: PhyloP100: -0.507

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 -16 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).
• BP6: Variant 11-47338684-G-A is Benign according to our data. Variant chr11-47338684-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 42599.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr11-47338684-G-A is described in Lovd as [Benign]. Variant chr11-47338684-G-A is described in Lovd as [Likely_benign].
• BS2: High Homozygotes in GnomAdExome4 at 11 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYBPC3	NM_000256.3	c.2149-5C>T		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		ENST00000545968.6	NP_000247.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MYBPC3	ENST00000545968.6	c.2149-5C>T		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		5	NM_000256.3	ENSP00000442795	P4
MYBPC3	ENST00000399249.6	c.2149-5C>T		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		5		ENSP00000382193	A2
MYBPC3	ENST00000544791.1	c.2149-5C>T		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant, NMD_transcript_variant		5		ENSP00000444259

Frequencies

GnomAD3 genomes AF: 0.000414 AC: 63 AN: 152182 Hom.: 1 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000589

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00809

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.000147

Gnomad OTH AF: 0.00191

GnomAD3 exomes AF: 0.000958 AC: 229 AN: 239032 Hom.: 3 AF XY: 0.00141 AC XY: 183 AN XY: 129728

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000327

Gnomad ASJ exome AF: 0.000209

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00634

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000232

Gnomad OTH exome AF: 0.000858

GnomAD4 exome AF: 0.000584 AC: 850 AN: 1455140 Hom.: 11 Cov.: 31 AF XY: 0.000832 AC XY: 602 AN XY: 723234

Gnomad4 AFR exome AF: 0.0000599

Gnomad4 AMR exome AF: 0.000634

Gnomad4 ASJ exome AF: 0.000233

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00703

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000140

Gnomad4 OTH exome AF: 0.000716

GnomAD4 genome AF: 0.000414 AC: 63 AN: 152300 Hom.: 1 Cov.: 32 AF XY: 0.000457 AC XY: 34 AN XY: 74470

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.000588

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00810

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000147

Gnomad4 OTH AF: 0.00189

Alfa AF: 0.000181 Hom.: 0

Bravo AF: 0.000178

Asia WGS AF: 0.00231 AC: 8 AN: 3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:14

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:3

Likely benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Oct 01, 2024	MYBPC3: BP4, BS2 -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 03, 2015	This variant is associated with the following publications: (PMID: 25351510) -

Hypertrophic cardiomyopathy 4 Benign:3

Likely benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -
Benign, criteria provided, single submitter	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	Sep 21, 2015	- -
Likely benign, criteria provided, single submitter	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	Jul 28, 2017	- -

not specified Benign:2

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 21, 2012	2149-5C>T in intron 22 of MYBPC3: This variant is not expected to have clinical significance because it is not located within the splice consensus sequence. It has been identified in 2/120 Columbian chromosomes from a broad population by th e 1000 Genomes project and in 3% (9/300) of Indian chromosomes from a population that included both unaffected individuals and individuals with HCM (dbSNP rs362 11722). -

Cardiomyopathy Benign:2

Benign, criteria provided, single submitter	clinical testing	CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario	Jan 13, 2023	- -
Benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Jun 18, 2018	- -

Left ventricular noncompaction 10 Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Primary familial hypertrophic cardiomyopathy Benign:1

Likely benign, no assertion criteria provided

clinical testing

Blueprint Genetics

Feb 11, 2014

- -

Hypertrophic cardiomyopathy Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 31, 2024

- -

Cardiovascular phenotype Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 29, 2018

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	-0.82
CADD	Benign	1.1
DANN	Benign	0.67

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000019
dbscSNV1_RF	Benign	0.0020
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

Other links and lift over

dbSNP: rs36211722; hg19: chr11-47360235;