Variant rs199846930 details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS2

The NM_000426.4(LAMA2):c.2323-18T>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000885 in 1,612,630 control chromosomes in the GnomAD database, including 14 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00085 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00089 ( 14 hom. )

Consequence

LAMA2
NM_000426.4 intron

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 1.22

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 Benign. Variant got -16 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.8).

BP6

Variant 6-129270606-T-A is Benign according to our data. Variant chr6-129270606-T-A is described in ClinVar as [Likely_benign]. Clinvar id is 256056.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS2

High Homozygotes in GnomAdExome4 at 14 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LAMA2	NM_000426.4 linkuse as main transcript	c.2323-18T>A		intron_variant		ENST00000421865.3
LAMA2	NM_001079823.2 linkuse as main transcript	c.2323-18T>A		intron_variant

Ensembl

Gene	Transcript	HGVSc	Effect	TSL	MANE	Appris
LAMA2	ENST00000421865.3 linkuse as main transcript	c.2323-18T>A	intron_variant	5	NM_000426.4
LAMA2	ENST00000617695.5 linkuse as main transcript	c.2323-18T>A	intron_variant	5
LAMA2	ENST00000618192.5 linkuse as main transcript	c.2323-18T>A	intron_variant	5		P1

Frequencies

GnomAD3 genomes

AF:

0.000855

AC:

130

AN:

152134

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.0236

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00228

Gnomad FIN

AF:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000426

Gnomad OTH

AF:

0.00143

GnomAD3 exomes

AF:

0.00154

AC:

386

AN:

250946

Hom.:

AF XY:

0.00161

AC XY:

219

AN XY:

135624

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000581

Gnomad ASJ exome

AF:

0.0248

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00193

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.000370

Gnomad OTH exome

AF:

0.00229

GnomAD4 exome

AF:

0.000888

AC:

1297

AN:

1460378

Hom.:

Cov.:

AF XY:

0.00102

AC XY:

740

AN XY:

726532

show subpopulations

Gnomad4 AFR exome

AF:

0.000180

Gnomad4 AMR exome

AF:

0.000695

Gnomad4 ASJ exome

AF:

0.0261

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00206

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000212

Gnomad4 OTH exome

AF:

0.00234

GnomAD4 genome

AF:

0.000854

AC:

130

AN:

152252

Hom.:

Cov.:

AF XY:

0.000739

AC XY:

AN XY:

74448

show subpopulations

Gnomad4 AFR

AF:

0.0000962

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.0236

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00228

Gnomad4 FIN

AF:

0.0000942

Gnomad4 NFE

AF:

0.000426

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.00436

Hom.:

Bravo

AF:

0.000963

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Apr 18, 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	-	- -

LAMA2-related muscular dystrophy

Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Jan 31, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.80

CADD

Benign

DANN

Benign

0.67

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.12

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