rs34997144

Positions:

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BA1

The NM_000426.4(LAMA2):c.8124T>A(p.Gly2708=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00318 in 1,614,160 control chromosomes in the GnomAD database, including 101 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.016 ( 44 hom., cov: 32)

Exomes 𝑓: 0.0019 ( 57 hom. )

Consequence

LAMA2
NM_000426.4 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:9

Conservation

PhyloP100: -0.184

Variant links:

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]

LAMA2 links:

(HGNC:):

links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.51).

BP6

Variant 6-129492363-T-A is Benign according to our data. Variant chr6-129492363-T-A is described in ClinVar as [Benign]. Clinvar id is 129444.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr6-129492363-T-A is described in Lovd as [Benign]. Variant chr6-129492363-T-A is described in Lovd as [Likely_benign].

BP7

Synonymous conserved (PhyloP=-0.184 with no splicing effect.

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0506 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
LAMA2	NM_000426.4 linkuse as main transcript	c.8124T>A	p.Gly2708=	synonymous_variant	58/65	ENST00000421865.3	NP_000417.3
LAMA2	NM_001079823.2 linkuse as main transcript	c.8112T>A	p.Gly2704=	synonymous_variant	57/64		NP_001073291.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
LAMA2	ENST00000421865.3 linkuse as main transcript	c.8124T>A	p.Gly2708=	synonymous_variant	58/65	5	NM_000426.4	ENSP00000400365
	ENST00000665046.1 linkuse as main transcript	n.975+10242A>T		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes

AF:

0.0158

AC:

2411

AN:

152222

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0524

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0107

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.0158

Gnomad NFE

AF:

0.000573

Gnomad OTH

AF:

0.0129

GnomAD3 exomes

AF:

0.00436

AC:

1095

AN:

251012

Hom.:

AF XY:

0.00310

AC XY:

421

AN XY:

135652

show subpopulations

Gnomad AFR exome

AF:

0.0502

Gnomad AMR exome

AF:

0.00538

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000196

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000591

Gnomad OTH exome

AF:

0.00326

GnomAD4 exome

AF:

0.00186

AC:

2714

AN:

1461820

Hom.:

Cov.:

AF XY:

0.00161

AC XY:

1173

AN XY:

727218

show subpopulations

Gnomad4 AFR exome

AF:

0.0515

Gnomad4 AMR exome

AF:

0.00550

Gnomad4 ASJ exome

AF:

0.000153

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000243

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000366

Gnomad4 OTH exome

AF:

0.00411

GnomAD4 genome

AF:

0.0159

AC:

2418

AN:

152340

Hom.:

Cov.:

AF XY:

0.0157

AC XY:

1167

AN XY:

74500

show subpopulations

Gnomad4 AFR

AF:

0.0524

Gnomad4 AMR

AF:

0.0107

Gnomad4 ASJ

AF:

0.000288

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000415

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000573

Gnomad4 OTH

AF:

0.0128

Alfa

AF:

0.00130

Hom.:

Bravo

AF:

0.0178

Asia WGS

AF:

0.00462

AC:

AN:

3478

EpiCase

AF:

0.000981

EpiControl

AF:

0.000889

ClinVar

Significance: Benign

Submissions summary: Benign:9

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:6

Benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Likely benign, no assertion criteria provided	clinical testing	Genetic Services Laboratory, University of Chicago	-	Likely benign based on allele frequency in 1000 Genomes Project or ESP global frequency and its presence in a patient with a rare or unrelated disease phenotype. NOT Sanger confirmed. -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Jul 08, 2016	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	PreventionGenetics, part of Exact Sciences	-	- -
Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jun 01, 2016	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -

LAMA2-related muscular dystrophy

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 31, 2024

- -

not provided

Benign:1

Likely benign, no assertion criteria provided

clinical testing

Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)

- -

Congenital muscular dystrophy due to partial LAMA2 deficiency

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.51

CADD

Benign

5.9

DANN

Benign

0.89

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