rs144492513

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4_StrongBP6

The NM_000426.4(LAMA2):c.2767G>A(p.Gly923Ser) variant causes a missense change. The variant allele was found at a frequency of 0.0000415 in 1,613,786 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. G923G) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000034 ( 1 hom. )

Consequence

LAMA2
NM_000426.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: 5.85

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.04699698).

BP6

Variant 6-129291631-G-A is Benign according to our data. Variant chr6-129291631-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 450118.We mark this variant Likely_benign, oryginal submissions are: {Benign=1, Uncertain_significance=1}. Variant chr6-129291631-G-A is described in Lovd as [Likely_benign].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LAMA2	NM_000426.4 linkuse as main transcript	c.2767G>A	p.Gly923Ser	missense_variant	20/65	ENST00000421865.3
LAMA2	NM_001079823.2 linkuse as main transcript	c.2767G>A	p.Gly923Ser	missense_variant	20/64

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
LAMA2	ENST00000421865.3 linkuse as main transcript	c.2767G>A	p.Gly923Ser	missense_variant	20/65	5	NM_000426.4
LAMA2	ENST00000618192.5 linkuse as main transcript	c.2767G>A	p.Gly923Ser	missense_variant	20/66	5		P1
LAMA2	ENST00000617695.5 linkuse as main transcript	c.2767G>A	p.Gly923Ser	missense_variant	20/64	5

Frequencies

GnomAD3 genomes

AF:

0.000112

AC:

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000386

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000597

AC:

AN:

251418

Hom.:

AF XY:

0.0000662

AC XY:

AN XY:

135888

show subpopulations

Gnomad AFR exome

AF:

0.000431

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.0000654

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000352

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000342

AC:

AN:

1461500

Hom.:

Cov.:

AF XY:

0.0000316

AC XY:

AN XY:

727076

show subpopulations

Gnomad4 AFR exome

AF:

0.000329

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000580

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000270

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.000112

AC:

AN:

152286

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74462

show subpopulations

Gnomad4 AFR

AF:

0.000385

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000825

Hom.:

Bravo

AF:

0.000140

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000741

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Dec 06, 2021

In silico analysis supports that this missense variant does not alter protein structure/function; Previously reported in an individual with dilated cardiomyopathy, however detailed clinical information was not provided (Mazzarotto et al., 2020); This variant is associated with the following publications: (PMID: 31983221, 30055037) -

LAMA2-related muscular dystrophy

Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Jan 22, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.046

BayesDel_addAF

Benign

-0.39

BayesDel_noAF

Benign

-0.47

Cadd

Benign

Dann

Uncertain

0.99

Eigen

Benign

-0.71

Eigen_PC

Benign

-0.49

FATHMM_MKL

Benign

0.13

LIST_S2

Benign

0.059

T;T;T

M_CAP

Benign

0.012

MetaRNN

Benign

0.047

T;T;T

MetaSVM

Benign

-0.98

MutationTaster

Benign

0.99

PrimateAI

Benign

0.38

Polyphen

0.0050

.;.;B

Vest4

0.27

MVP

0.54

MPC

0.088

ClinPred

0.073

GERP RS

3.4

Varity_R

0.064

gMVP

0.15

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