1-156137190-C-T
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Variant summary
Our verdict is Benign. Variant got -8 ACMG points: 2P and 10B. PM2BP4_StrongBP6BP7BS1
The NM_170707.4(LMNA):c.1566C>T(p.Cys522=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000311 in 1,606,768 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Genomes: 𝑓 0.0012 ( 1 hom., cov: 32)
Exomes 𝑓: 0.00022 ( 0 hom. )
Consequence
LMNA
NM_170707.4 synonymous
NM_170707.4 synonymous
Scores
5
Clinical Significance
Conservation
PhyloP100: -2.86
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]
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ACMG classification
Classification made for transcript
Verdict is Benign. Variant got -8 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (BayesDel_addAF=-0.503423).
BP6
Variant 1-156137190-C-T is Benign according to our data. Variant chr1-156137190-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 48043.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=15, Benign=6, Uncertain_significance=2}. Variant chr1-156137190-C-T is described in Lovd as [Benign]. Variant chr1-156137190-C-T is described in Lovd as [Likely_benign].
BP7
Synonymous conserved (PhyloP=-2.86 with no splicing effect.
BS1
Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00121 (185/152274) while in subpopulation AFR AF= 0.00378 (157/41542). AF 95% confidence interval is 0.0033. There are 1 homozygotes in gnomad4. There are 90 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
LMNA | NM_170707.4 | c.1566C>T | p.Cys522= | synonymous_variant | 9/12 | ENST00000368300.9 | NP_733821.1 | |
LMNA | NM_005572.4 | c.1566C>T | p.Cys522= | synonymous_variant | 9/10 | ENST00000677389.1 | NP_005563.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
LMNA | ENST00000368300.9 | c.1566C>T | p.Cys522= | synonymous_variant | 9/12 | 1 | NM_170707.4 | ENSP00000357283 | P1 | |
LMNA | ENST00000677389.1 | c.1566C>T | p.Cys522= | synonymous_variant | 9/10 | NM_005572.4 | ENSP00000503633 |
Frequencies
GnomAD3 genomes AF: 0.00122 AC: 185AN: 152156Hom.: 1 Cov.: 32
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GnomAD3 exomes AF: 0.000437 AC: 102AN: 233258Hom.: 0 AF XY: 0.000339 AC XY: 43AN XY: 126692
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GnomAD4 exome AF: 0.000216 AC: 314AN: 1454494Hom.: 0 Cov.: 32 AF XY: 0.000203 AC XY: 147AN XY: 723116
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GnomAD4 genome AF: 0.00121 AC: 185AN: 152274Hom.: 1 Cov.: 32 AF XY: 0.00121 AC XY: 90AN XY: 74452
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ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Uncertain:2Benign:25
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
not specified Uncertain:1Benign:6
Benign, no assertion criteria provided | clinical testing | Clinical Genetics, Academic Medical Center | - | - - |
Benign, criteria provided, single submitter | clinical testing | GeneDx | Sep 04, 2014 | This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. - |
Benign, criteria provided, single submitter | clinical testing | Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine | Apr 10, 2012 | Cys522Cys in Exon 09 of LMNA: This variant is not expected to have clinical sign ificance because it does not alter an amino acid residue, is not located within the splice consensus sequence and has been identified in 0.4% (16/3736) of Afric an American chromosomes from a broad population by the NHLBI Exome Sequencing Pr oject (http://evs.gs.washington.edu/EVS; dbSNP rs149339264). - |
Likely benign, criteria provided, single submitter | clinical testing | Eurofins Ntd Llc (ga) | Aug 20, 2015 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Genetic Services Laboratory, University of Chicago | Feb 08, 2013 | - - |
Benign, criteria provided, single submitter | clinical testing | Athena Diagnostics | Jan 24, 2020 | - - |
Benign, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Jul 09, 2018 | Variant summary: LMNA c.1566C>T alters a non-conserved nucleotide resulting in a synonymous change. 5/5 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.00052 in 259802 control chromosomes (gnomAD). The observed variant frequency is approximately 2-fold of the estimated maximal expected allele frequency for a pathogenic variant in LMNA causing Cardiomyopathy phenotype (0.00025), strongly suggesting that the variant is benign. To our knowledge, no occurrence of c.1566C>T in individuals affected with Cardiomyopathy and no experimental evidence demonstrating its impact on protein function have been reported. Four clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as benign/likely benign. Based on the evidence outlined above, the variant was classified as benign. - |
not provided Benign:4
Likely benign, criteria provided, single submitter | clinical testing | CeGaT Center for Human Genetics Tuebingen | Jun 01, 2024 | LMNA: BP4, BP7 - |
Likely benign, no assertion criteria provided | clinical testing | Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center | - | - - |
Likely benign, no assertion criteria provided | clinical testing | Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC) | - | - - |
Likely benign, no assertion criteria provided | clinical testing | Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen | - | - - |
Dilated cardiomyopathy 1A Uncertain:1Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Apr 27, 2017 | This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. - |
Uncertain significance, criteria provided, single submitter | research | Clinical Genomics, Uppaluri K&H Personalized Medicine Clinic | - | Potent mutations in LMNA gene can lead to structural alteration in skeletal and cardiac muscle by altering the structure of Lamin A and Lamin C. It is associated with dilated cardiomyopathy and skeletal muscle dystrophies. However no sufficient evidence is found to ascertain the role of this particular variant rs149339264, yet. - |
Charcot-Marie-Tooth disease Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Molecular Genetics Laboratory, London Health Sciences Centre | - | - - |
Limb-girdle muscular dystrophy, recessive Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jun 14, 2016 | - - |
Emery-Dreifuss muscular dystrophy Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Apr 27, 2017 | This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. - |
Cardiomyopathy Benign:1
Benign, criteria provided, single submitter | clinical testing | Color Diagnostics, LLC DBA Color Health | Oct 15, 2018 | - - |
Charcot-Marie-Tooth disease type 2B1 Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Apr 27, 2017 | This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. - |
Congenital muscular dystrophy due to LMNA mutation Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Apr 27, 2017 | This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. - |
Hutchinson-Gilford syndrome Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jun 14, 2016 | - - |
Mandibuloacral dysplasia with type A lipodystrophy Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Apr 27, 2017 | This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. - |
Charcot-Marie-Tooth disease type 2 Benign:1
Benign, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Jan 29, 2024 | - - |
Lethal tight skin contracture syndrome Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Apr 27, 2017 | This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. - |
Lipoatrophy with Diabetes, Hepatic Steatosis, Hypertrophic Cardiomyopathy, and Leukomelanodermic Papules Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Apr 27, 2017 | This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. - |
Familial partial lipodystrophy, Dunnigan type Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Apr 27, 2017 | This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. - |
Cardiovascular phenotype Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Ambry Genetics | Feb 01, 2016 | 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. - |
Emery-Dreifuss muscular dystrophy 2, autosomal dominant Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Apr 27, 2017 | This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. - |
Computational scores
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Name
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BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
FATHMM_MKL
Benign
N
MutationTaster
Benign
D;D;D;D;D;D;D;D;D
GERP RS
RBP_binding_hub_radar
RBP_regulation_power_radar
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