rs1553266024
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong
The NM_170707.4(LMNA):c.1436del(p.Leu479ArgfsTer11) variant causes a frameshift change involving the alteration of a 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. L479L) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.
Frequency
Genomes: not found (cov: 32)
Consequence
LMNA
NM_170707.4 frameshift
NM_170707.4 frameshift
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 7.81
Genes affected
LMNA (HGNC:6636): (lamin A/C) The protein encoded by this gene is part of the nuclear lamina, a two-dimensional matrix of proteins located next to the inner nuclear membrane. The lamin family of proteins make up the matrix and are highly conserved in evolution. During mitosis, the lamina matrix is reversibly disassembled as the lamin proteins are phosphorylated. Lamin proteins are thought to be involved in nuclear stability, chromatin structure and gene expression. Vertebrate lamins consist of two types, A and B. Alternative splicing results in multiple transcript variants. Mutations in this gene lead to several diseases: Emery-Dreifuss muscular dystrophy, familial partial lipodystrophy, limb girdle muscular dystrophy, dilated cardiomyopathy, Charcot-Marie-Tooth disease, and Hutchinson-Gilford progeria syndrome. [provided by RefSeq, May 2022]
Genome browser will be placed here
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 1-156136975-CT-C is Pathogenic according to our data. Variant chr1-156136975-CT-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 476823.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
LMNA | NM_170707.4 | c.1436del | p.Leu479ArgfsTer11 | frameshift_variant | 8/12 | ENST00000368300.9 | |
LMNA | NM_005572.4 | c.1436del | p.Leu479ArgfsTer11 | frameshift_variant | 8/10 | ENST00000677389.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
LMNA | ENST00000368300.9 | c.1436del | p.Leu479ArgfsTer11 | frameshift_variant | 8/12 | 1 | NM_170707.4 | P1 | |
LMNA | ENST00000677389.1 | c.1436del | p.Leu479ArgfsTer11 | frameshift_variant | 8/10 | NM_005572.4 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD4 exome Cov.: 32
GnomAD4 exome
Cov.:
32
GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
Cov.:
32
ClinVar
Significance: Pathogenic/Likely pathogenic
Submissions summary: Pathogenic:3
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
not provided Pathogenic:2
Likely pathogenic, criteria provided, single submitter | clinical testing | GeneDx | Feb 28, 2018 | A variant that is likely pathogenic has been identified in the LMNA gene. The c.1436delT variant hasnot been published as a pathogenic variant, nor has it been reported as a benign variant to our knowledge. The c.1436delT variant causes a frameshift starting with codon Leucine 479, changes this amino acid to an Arginine residue and creates a premature Stop codon at position 11 of the new reading frame, denoted p.Leu479ArgfsX11. This variant is predicted to cause loss of normal protein function either through protein truncation or nonsense-mediated mRNA decay. The c.1436delT variant is not observed in large population cohorts (Lek et al., 2016). Therefore, this variant is likelypathogenic; however, the possibility that it is benign cannot be excluded. - |
Likely pathogenic, criteria provided, single submitter | clinical testing | Revvity Omics, Revvity | Feb 03, 2021 | - - |
Charcot-Marie-Tooth disease type 2 Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Jul 19, 2022 | For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 476823). This variant has not been reported in the literature in individuals affected with LMNA-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Leu479Argfs*11) in the LMNA gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in LMNA are known to be pathogenic (PMID: 18585512, 18926329). - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at