rs397516081
Positions:
Variant summary
Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong
The NM_000256.3(MYBPC3):c.926+4A>G variant causes a splice donor region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000014 in 1,431,830 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 Uncertain significance (★★).
Frequency
Genomes: not found (cov: 31)
Exomes 𝑓: 0.0000014 ( 0 hom. )
Consequence
MYBPC3
NM_000256.3 splice_donor_region, intron
NM_000256.3 splice_donor_region, intron
Scores
2
Splicing: ADA: 0.4652
2
Clinical Significance
Conservation
PhyloP100: 1.82
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]
Genome browser will be placed here
ACMG classification
Classification made for transcript
Verdict is Likely_benign. Variant got -2 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (BayesDel_noAF=-0.52).
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MYBPC3 | NM_000256.3 | c.926+4A>G | splice_donor_region_variant, intron_variant | ENST00000545968.6 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MYBPC3 | ENST00000545968.6 | c.926+4A>G | splice_donor_region_variant, intron_variant | 5 | NM_000256.3 | P4 | |||
MYBPC3 | ENST00000399249.6 | c.926+4A>G | splice_donor_region_variant, intron_variant | 5 | A2 | ||||
MYBPC3 | ENST00000544791.1 | c.926+4A>G | splice_donor_region_variant, intron_variant, NMD_transcript_variant | 5 |
Frequencies
GnomAD3 genomes Cov.: 31
GnomAD3 genomes
Cov.:
31
GnomAD4 exome AF: 0.00000140 AC: 2AN: 1431830Hom.: 0 Cov.: 38 AF XY: 0.00000141 AC XY: 1AN XY: 709186
GnomAD4 exome
AF:
AC:
2
AN:
1431830
Hom.:
Cov.:
38
AF XY:
AC XY:
1
AN XY:
709186
Gnomad4 AFR exome
AF:
Gnomad4 AMR exome
AF:
Gnomad4 ASJ exome
AF:
Gnomad4 EAS exome
AF:
Gnomad4 SAS exome
AF:
Gnomad4 FIN exome
AF:
Gnomad4 NFE exome
AF:
Gnomad4 OTH exome
AF:
GnomAD4 genome Cov.: 31
GnomAD4 genome
Cov.:
31
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:3
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
not specified Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine | Oct 10, 2020 | The c.926+4A>G variant in MYBPC3 has been reported in one individual with dilated cardiomyopathy (DCM; Ito 2017 PMID: 28679633) and was absent from large population studies. This variant is located in the 5' splice region. Computational tools predict a splicing impact and functional studies using a cell-based minigene splicing assay provide some evidence that this variant impacts splicing (Ito 2017 PMID: 28679633). In summary, the clinical significance of this variant is uncertain. ACMG/AMP Criteria applied: PM2, PP3, PS3_Supporting. - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Oct 02, 2020 | Reported in association with cardiomyopathy (Ito et al., 2017); however, additional clinical information was not provided; In-silico analysis, which includes splice predictors and evolutionary conservation, is inconclusive as to whether the variant alters gene splicing. In the absence of RNA/functional studies, the actual effect of this sequence change is unknown.; This variant is associated with the following publications: (PMID: 28679633) - |
Hypertrophic cardiomyopathy Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Aug 12, 2021 | This sequence change falls in intron 11 of the MYBPC3 gene. It does not directly change the encoded amino acid sequence of the MYBPC3 protein. It affects a nucleotide within the consensus splice site of the intron. This variant is present in population databases (rs397516081, ExAC 0.009%). This variant has been observed in individual(s) with dilated cardiomyopathy (PMID: 28679633). ClinVar contains an entry for this variant (Variation ID: 42803). Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Studies have shown that this variant is associated with altered splicing, but the impact on the resulting protein product is unknown (PMID: 28679633). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
Splicing
Name
Calibrated prediction
Score
Prediction
dbscSNV1_ADA
Benign
dbscSNV1_RF
Benign
SpliceAI score (max)
Details are displayed if max score is > 0.2
DS_DL_spliceai
Position offset: 4
Find out detailed SpliceAI scores and Pangolin per-transcript scores at