rs786205654
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong
The NM_000426.4(LAMA2):c.1762del(p.Ala588LeufsTer11) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. P587P) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.
Frequency
Genomes: not found (cov: 33)
Consequence
LAMA2
NM_000426.4 frameshift
NM_000426.4 frameshift
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: -1.08
Genes affected
LAMA2 (HGNC:6482): (laminin subunit alpha 2) Laminin, an extracellular protein, is a major component of the basement membrane. It is thought to mediate the attachment, migration, and organization of cells into tissues during embryonic development by interacting with other extracellular matrix components. It is composed of three subunits, alpha, beta, and gamma, which are bound to each other by disulfide bonds into a cross-shaped molecule. This gene encodes the alpha 2 chain, which constitutes one of the subunits of laminin 2 (merosin) and laminin 4 (s-merosin). Mutations in this gene have been identified as the cause of congenital merosin-deficient muscular dystrophy. Two transcript variants encoding different proteins have been found for this gene. [provided by RefSeq, Jul 2008]
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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 6-129192831-CG-C is Pathogenic according to our data. Variant chr6-129192831-CG-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 191334.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr6-129192831-CG-C is described in Lovd as [Pathogenic]. Variant chr6-129192831-CG-C is described in Lovd as [Likely_pathogenic].
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
LAMA2 | NM_000426.4 | c.1762del | p.Ala588LeufsTer11 | frameshift_variant | 12/65 | ENST00000421865.3 | |
LAMA2 | NM_001079823.2 | c.1762del | p.Ala588LeufsTer11 | frameshift_variant | 12/64 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
LAMA2 | ENST00000421865.3 | c.1762del | p.Ala588LeufsTer11 | frameshift_variant | 12/65 | 5 | NM_000426.4 |
Frequencies
GnomAD3 genomes ? Cov.: 33
GnomAD3 genomes
?
Cov.:
33
GnomAD4 exome Cov.: 32
GnomAD4 exome
Cov.:
32
GnomAD4 genome ? Cov.: 33
GnomAD4 genome
?
Cov.:
33
ClinVar
Significance: Pathogenic/Likely pathogenic
Submissions summary: Pathogenic:4
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
not provided Pathogenic:4
Likely pathogenic, criteria provided, single submitter | clinical testing | Revvity Omics, Revvity | Dec 05, 2022 | - - |
Likely pathogenic, criteria provided, single submitter | research | Department Of Translational Genomics (developmental Genetics Section), King Faisal Specialist Hospital & Research Centre | - | - - |
Pathogenic, criteria provided, single submitter | clinical testing | GeneDx | Dec 21, 2020 | 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; Not observed in large population cohorts (Lek et al., 2016); This variant is associated with the following publications: (PMID: 30055037, 27124789, 33101984, 31130284) - |
Pathogenic, criteria provided, single submitter | clinical testing | CeGaT Center for Human Genetics Tuebingen | May 01, 2022 | LAMA2: PVS1, PM2 - |
Computational scores
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Calibrated prediction
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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