6-129383131-G-A

Position:

chr6-129383131-G-A

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BP4

The NM_000426.4(LAMA2):c.4969G>A(p.Val1657Met) variant causes a missense change. The variant allele was found at a frequency of 0.000163 in 1,613,438 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). Synonymous variant affecting the same amino acid position (i.e. V1657V) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00017 ( 1 hom. )

Consequence

LAMA2
NM_000426.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:1O:1

Conservation

PhyloP100: 5.48

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 -1 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.30833888).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LAMA2	NM_000426.4 linkuse as main transcript	c.4969G>A	p.Val1657Met	missense_variant	35/65	ENST00000421865.3
LAMA2	NM_001079823.2 linkuse as main transcript	c.4969G>A	p.Val1657Met	missense_variant	35/64

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
LAMA2	ENST00000421865.3 linkuse as main transcript	c.4969G>A	p.Val1657Met	missense_variant	35/65	5	NM_000426.4
LAMA2	ENST00000618192.5 linkuse as main transcript	c.5233G>A	p.Val1745Met	missense_variant	36/66	5		P1
LAMA2	ENST00000617695.5 linkuse as main transcript	c.4969G>A	p.Val1657Met	missense_variant	35/64	5
LAMA2	ENST00000687590.1 linkuse as main transcript	n.1389G>A		non_coding_transcript_exon_variant	3/5

Frequencies

GnomAD3 genomes

AF:

0.000125

AC:

AN:

152214

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

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:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000220

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000156

AC:

AN:

249888

Hom.:

AF XY:

0.000148

AC XY:

AN XY:

134986

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000924

Gnomad NFE exome

AF:

0.000329

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000167

AC:

244

AN:

1461224

Hom.:

Cov.:

AF XY:

0.000166

AC XY:

121

AN XY:

726906

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.000150

Gnomad4 NFE exome

AF:

0.000206

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.000125

AC:

AN:

152214

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74354

show subpopulations

Gnomad4 AFR

AF:

0.0000724

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000942

Gnomad4 NFE

AF:

0.000220

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000306

Hom.:

Bravo

AF:

0.0000756

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000214

AC:

EpiCase

AF:

0.000218

EpiControl

AF:

0.000296

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:1Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Apr 05, 2021	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Dec 18, 2014	- -

LAMA2-related muscular dystrophy

Benign:1Other:1

not provided, no classification provided	phenotyping only	GenomeConnect, ClinGen	-	Variant interpretted as Uncertain significance and reported on 02-08-2015 by Lab or GTR ID 26957. GenomeConnect assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. GenomeConnect staff make no attempt to reinterpret the clinical significance of the variant. -
Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 16, 2024	- -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Athena Diagnostics

Aug 22, 2016

- -

Merosin deficient congenital muscular dystrophy;C4748327:Muscular dystrophy, limb-girdle, autosomal recessive 23

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Oct 31, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.26

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Benign

-0.22

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.016

.;T;T

Eigen

Uncertain

0.67

Eigen_PC

Pathogenic

0.71

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.97

D;D;D

M_CAP

Benign

0.011

MetaRNN

Benign

0.31

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.4

.;.;M

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.61

PROVEAN

Benign

-1.0

.;.;N

REVEL

Uncertain

0.30

Sift

Benign

0.17

.;.;T

Polyphen

1.0

.;.;D

Vest4

0.51

MVP

0.53

MPC

0.21

ClinPred

0.20

GERP RS

5.9

Varity_R

0.30

gMVP

0.69

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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