1-156135271-A-G

Position:

chr1-156135271-A-G

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 3P and 4B. PM2PP2BP4_Strong

The NM_170707.4(LMNA):c.895A>G(p.Ile299Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000178 in 1,613,644 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00018 ( 0 hom. )

Consequence

LMNA
NM_170707.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:7

Conservation

PhyloP100: 2.98

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]

LMNA links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), LMNA. . Gene score misZ 2.3673 (greater than the threshold 3.09). Trascript score misZ 3.0905 (greater than threshold 3.09). GenCC has associacion of gene with familial partial lipodystrophy, Dunnigan type, autosomal recessive Emery-Dreifuss muscular dystrophy, LMNA-related cardiocutaneous progeria syndrome, atrioventricular block, dilated cardiomyopathy 1A, Emery-Dreifuss muscular dystrophy 2, autosomal dominant, atypical Werner syndrome, restrictive dermopathy 1, autosomal semi-dominant severe lipodystrophic laminopathy, Emery-Dreifuss muscular dystrophy 3, autosomal recessive, dilated cardiomyopathy, Charcot-Marie-Tooth disease type 2B1, dilated cardiomyopathy-hypergonadotropic hypogonadism syndrome, arrhythmogenic right ventricular cardiomyopathy, familial isolated dilated cardiomyopathy, mandibuloacral dysplasia with type A lipodystrophy, autosomal dominant Emery-Dreifuss muscular dystrophy, heart-hand syndrome, Slovenian type, congenital muscular dystrophy due to LMNA mutation, lethal restrictive dermopathy, Hutchinson-Gilford progeria syndrome.

BP4

Computational evidence support a benign effect (MetaRNN=0.019576252).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
LMNA	NM_170707.4 linkuse as main transcript	c.895A>G	p.Ile299Val	missense_variant	5/12	ENST00000368300.9	NP_733821.1
LMNA	NM_005572.4 linkuse as main transcript	c.895A>G	p.Ile299Val	missense_variant	5/10	ENST00000677389.1	NP_005563.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
LMNA	ENST00000368300.9 linkuse as main transcript	c.895A>G	p.Ile299Val	missense_variant	5/12	1	NM_170707.4	ENSP00000357283	P1	P02545-1
LMNA	ENST00000677389.1 linkuse as main transcript	c.895A>G	p.Ile299Val	missense_variant	5/10		NM_005572.4	ENSP00000503633		P02545-2

Frequencies

GnomAD3 genomes

AF:

0.000158

AC:

AN:

152262

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000785

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000479

AC:

120

AN:

250316

Hom.:

AF XY:

0.000383

AC XY:

AN XY:

135598

show subpopulations

Gnomad AFR exome

AF:

0.0000623

Gnomad AMR exome

AF:

0.00307

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000708

Gnomad OTH exome

AF:

0.000656

GnomAD4 exome

AF:

0.000181

AC:

264

AN:

1461264

Hom.:

Cov.:

AF XY:

0.000160

AC XY:

116

AN XY:

726940

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00262

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000117

Gnomad4 OTH exome

AF:

0.000215

GnomAD4 genome

AF:

0.000158

AC:

AN:

152380

Hom.:

Cov.:

AF XY:

0.000174

AC XY:

AN XY:

74514

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.000784

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000120

Hom.:

Bravo

AF:

0.000314

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.000395

AC:

EpiCase

AF:

0.000218

EpiControl

AF:

0.000119

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5Benign:7

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2Benign:2

Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Jun 07, 2022	- -
Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Sep 07, 2018	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jun 26, 2017	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Jan 18, 2021	This variant is associated with the following publications: (PMID: 28663758, 25163546, 25351510, 25367549, 25637381, 24503780, 21883346, 27841971, 26332594, 25832542) -

not specified

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Mar 07, 2019	Variant classified as Uncertain Significance - Favor Benign. The p.Ile299Val variant in LMNA has been reported in 1 individual with Familial Partial Lipodystrophy (FPLD2) and lipomas (it is unclear if this individual had any cardiac manifestations), segregated with disease in 2 affected relatives but was also detected in 1 assymptomatic nephew of the proband, and was absent from 100 control chromosomes (AraÃºjo-Vilar 2011). It has also been reported in 1 individual with DCM (Pugh 2014). This variant has also been identified in 0.3% of Latino chromosomes in gnomAD. Conserved across evolutionarily distant species, however computational predictions on the impact to the protein are mixed . This data suggests that the Ile299Val variant may be benign for cardiomyopathy and Familial Partial Lipodystrophy, although additional information is needed to fully assess its clinical significance. -
Likely benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Mar 05, 2022	- -

Charcot-Marie-Tooth disease

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Molecular Genetics Laboratory, London Health Sciences Centre

- -

Familial partial lipodystrophy, Dunnigan type

Uncertain:1

Uncertain significance, no assertion criteria provided

research

CSER _CC_NCGL, University of Washington

Jun 01, 2014

- -

Cardiomyopathy

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Color Diagnostics, LLC DBA Color Health

Sep 10, 2018

- -

Charcot-Marie-Tooth disease type 2

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Feb 01, 2024

- -

LMNA-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

May 15, 2024

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Cardiovascular phenotype

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 17, 2017

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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

CardioboostCm

Benign

0.030

BayesDel_addAF

Benign

-0.059

BayesDel_noAF

Pathogenic

0.14

CADD

Benign

DANN

Benign

0.95

DEOGEN2

Uncertain

0.59

.;.;.;D;.;.;.;.

Eigen

Benign

-0.19

Eigen_PC

Benign

0.019

FATHMM_MKL

Uncertain

0.90

LIST_S2

Benign

0.83

T;T;T;T;T;T;T;T

M_CAP

Uncertain

0.095

MetaRNN

Benign

0.020

T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.44

MutationAssessor

Benign

0.93

L;.;L;L;L;.;.;.

MutationTaster

Benign

0.99

D;D;D;D;D;D;D;D;D

PrimateAI

Uncertain

0.62

PROVEAN

Benign

-0.33

N;N;N;N;N;N;N;N

REVEL

Uncertain

0.45

Sift

Benign

0.49

T;T;T;T;T;T;T;T

Sift4G

Benign

0.48

T;T;T;T;T;T;T;T

Polyphen

0.0090

B;.;B;B;.;.;B;.

Vest4

0.60

MVP

0.97

MPC

0.81

ClinPred

0.038

GERP RS

5.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.8

Varity_R

0.060

gMVP

0.84

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over