rs730880651
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong
The NM_000256.3(MYBPC3):c.2267del(p.Pro756LeufsTer66) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. P756P) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.
Frequency
Genomes: not found (cov: 32)
Consequence
MYBPC3
NM_000256.3 frameshift
NM_000256.3 frameshift
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 4.52
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]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 18 ACMG points.
PVS1
?
Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
PM2
?
Very rare variant in population databases, with high coverage;
PP5
?
Variant 11-47338560-AG-A is Pathogenic according to our data. Variant chr11-47338560-AG-A is described in ClinVar as [Pathogenic]. Clinvar id is 181078.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr11-47338560-AG-A is described in Lovd as [Pathogenic].
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MYBPC3 | NM_000256.3 | c.2267del | p.Pro756LeufsTer66 | frameshift_variant | 23/35 | ENST00000545968.6 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MYBPC3 | ENST00000545968.6 | c.2267del | p.Pro756LeufsTer66 | frameshift_variant | 23/35 | 5 | NM_000256.3 | P4 | |
MYBPC3 | ENST00000399249.6 | c.2267del | p.Pro756LeufsTer66 | frameshift_variant | 22/34 | 5 | A2 | ||
MYBPC3 | ENST00000544791.1 | c.2267del | p.Pro756LeufsTer? | frameshift_variant, NMD_transcript_variant | 23/27 | 5 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD4 exome Cov.: 31
GnomAD4 exome
Cov.:
31
GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
Cov.:
32
ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:3
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Cardiomyopathy Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario | Apr 07, 2022 | - - |
not provided Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | GeneDx | May 18, 2023 | Not observed at significant frequency in large population cohorts (gnomAD); Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; This variant is associated with the following publications: (PMID: 20474083, 27532257, 10521296) - |
Hypertrophic cardiomyopathy Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Jan 20, 2024 | This sequence change creates a premature translational stop signal (p.Pro756Leufs*66) in the MYBPC3 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in MYBPC3 are known to be pathogenic (PMID: 19574547). This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individual(s) with hypertrophic cardiomyopathy (PMID: 10521296, 27532257). ClinVar contains an entry for this variant (Variation ID: 181078). For these reasons, this variant has been classified as Pathogenic. - |
Computational scores
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Calibrated prediction
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Prediction
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at