1-156137190-C-T

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

Scores

5

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:25

Conservation

PhyloP100: -2.86
Variant links:
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
LMNANM_170707.4 linkuse as main transcriptc.1566C>T p.Cys522= synonymous_variant 9/12 ENST00000368300.9 NP_733821.1
LMNANM_005572.4 linkuse as main transcriptc.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
LMNAENST00000368300.9 linkuse as main transcriptc.1566C>T p.Cys522= synonymous_variant 9/121 NM_170707.4 ENSP00000357283 P1P02545-1
LMNAENST00000677389.1 linkuse as main transcriptc.1566C>T p.Cys522= synonymous_variant 9/10 NM_005572.4 ENSP00000503633 P02545-2

Frequencies

GnomAD3 genomes
AF:
0.00122
AC:
185
AN:
152156
Hom.:
1
Cov.:
32
show subpopulations
Gnomad AFR
AF:
0.00379
Gnomad AMI
AF:
0.00
Gnomad AMR
AF:
0.000982
Gnomad ASJ
AF:
0.00
Gnomad EAS
AF:
0.00
Gnomad SAS
AF:
0.000414
Gnomad FIN
AF:
0.00
Gnomad MID
AF:
0.00
Gnomad NFE
AF:
0.000132
Gnomad OTH
AF:
0.000956
GnomAD3 exomes
AF:
0.000437
AC:
102
AN:
233258
Hom.:
0
AF XY:
0.000339
AC XY:
43
AN XY:
126692
show subpopulations
Gnomad AFR exome
AF:
0.00377
Gnomad AMR exome
AF:
0.000826
Gnomad ASJ exome
AF:
0.00
Gnomad EAS exome
AF:
0.00
Gnomad SAS exome
AF:
0.000103
Gnomad FIN exome
AF:
0.00
Gnomad NFE exome
AF:
0.000124
Gnomad OTH exome
AF:
0.000348
GnomAD4 exome
AF:
0.000216
AC:
314
AN:
1454494
Hom.:
0
Cov.:
32
AF XY:
0.000203
AC XY:
147
AN XY:
723116
show subpopulations
Gnomad4 AFR exome
AF:
0.00362
Gnomad4 AMR exome
AF:
0.00110
Gnomad4 ASJ exome
AF:
0.00
Gnomad4 EAS exome
AF:
0.00
Gnomad4 SAS exome
AF:
0.0000703
Gnomad4 FIN exome
AF:
0.0000193
Gnomad4 NFE exome
AF:
0.0000929
Gnomad4 OTH exome
AF:
0.000500
GnomAD4 genome
AF:
0.00121
AC:
185
AN:
152274
Hom.:
1
Cov.:
32
AF XY:
0.00121
AC XY:
90
AN XY:
74452
show subpopulations
Gnomad4 AFR
AF:
0.00378
Gnomad4 AMR
AF:
0.000981
Gnomad4 ASJ
AF:
0.00
Gnomad4 EAS
AF:
0.00
Gnomad4 SAS
AF:
0.000414
Gnomad4 FIN
AF:
0.00
Gnomad4 NFE
AF:
0.000132
Gnomad4 OTH
AF:
0.000946
Alfa
AF:
0.000639
Hom.:
0
Bravo
AF:
0.00138
ESP6500AA
AF:
0.00386
AC:
17
ESP6500EA
AF:
0.00
AC:
0
ExAC
AF:
0.000429
AC:
52
Asia WGS
AF:
0.00173
AC:
6
AN:
3478

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 providedclinical testingClinical Genetics, Academic Medical Center-- -
Benign, criteria provided, single submitterclinical testingGeneDxSep 04, 2014This 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 submitterclinical testingLaboratory for Molecular Medicine, Mass General Brigham Personalized MedicineApr 10, 2012Cys522Cys 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 submitterclinical testingEurofins Ntd Llc (ga)Aug 20, 2015- -
Uncertain significance, criteria provided, single submitterclinical testingGenetic Services Laboratory, University of ChicagoFeb 08, 2013- -
Benign, criteria provided, single submitterclinical testingAthena DiagnosticsJan 24, 2020- -
Benign, criteria provided, single submitterclinical testingWomen's Health and Genetics/Laboratory Corporation of America, LabCorpJul 09, 2018Variant 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 submitterclinical testingCeGaT Center for Human Genetics TuebingenJun 01, 2024LMNA: BP4, BP7 -
Likely benign, no assertion criteria providedclinical testingClinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center-- -
Likely benign, no assertion criteria providedclinical testingLaboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)-- -
Likely benign, no assertion criteria providedclinical testingDiagnostic Laboratory, Department of Genetics, University Medical Center Groningen-- -
Dilated cardiomyopathy 1A Uncertain:1Benign:1
Likely benign, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaApr 27, 2017This 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 submitterresearchClinical 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 submitterclinical testingMolecular Genetics Laboratory, London Health Sciences Centre-- -
Limb-girdle muscular dystrophy, recessive Benign:1
Likely benign, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaJun 14, 2016- -
Emery-Dreifuss muscular dystrophy Benign:1
Likely benign, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaApr 27, 2017This 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 submitterclinical testingColor Diagnostics, LLC DBA Color HealthOct 15, 2018- -
Charcot-Marie-Tooth disease type 2B1 Benign:1
Likely benign, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaApr 27, 2017This 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 submitterclinical testingIllumina Laboratory Services, IlluminaApr 27, 2017This 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 submitterclinical testingIllumina Laboratory Services, IlluminaJun 14, 2016- -
Mandibuloacral dysplasia with type A lipodystrophy Benign:1
Likely benign, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaApr 27, 2017This 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 submitterclinical testingLabcorp Genetics (formerly Invitae), LabcorpJan 29, 2024- -
Lethal tight skin contracture syndrome Benign:1
Likely benign, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaApr 27, 2017This 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 submitterclinical testingIllumina Laboratory Services, IlluminaApr 27, 2017This 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 submitterclinical testingIllumina Laboratory Services, IlluminaApr 27, 2017This 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 submitterclinical testingAmbry GeneticsFeb 01, 2016This 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 submitterclinical testingIllumina Laboratory Services, IlluminaApr 27, 2017This 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

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Benign
-0.50
T
BayesDel_noAF
Benign
-0.50
CADD
Benign
7.7
DANN
Benign
0.81
FATHMM_MKL
Benign
0.18
N
MutationTaster
Benign
1.0
D;D;D;D;D;D;D;D;D
GERP RS
-3.9
RBP_binding_hub_radar
0.0
RBP_regulation_power_radar
1.7

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.0
Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs149339264; hg19: chr1-156106981; API