6-129401336-T-G

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_StrongBP6

The NM_000426.4(LAMA2):c.5558T>G(p.Ile1853Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000167 in 1,556,158 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I1853T) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00018 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00017 ( 0 hom. )

Consequence

LAMA2
NM_000426.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:4

Conservation

PhyloP100: 2.88

Publications

3 publications found

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 Gene-Disease associations (from GenCC):

congenital merosin-deficient muscular dystrophy 1A
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, G2P, Myriad Women’s Health
LAMA2-related muscular dystrophy
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
muscular dystrophy, limb-girdle, autosomal recessive 23
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)

LAMA2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.041600555).

BP6

Variant 6-129401336-T-G is Benign according to our data. Variant chr6-129401336-T-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 355280.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000426.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LAMA2	NM_000426.4	MANE Select	c.5558T>G	p.Ile1853Arg	missense	Exon 38 of 65	NP_000417.3
	LAMA2	NM_001079823.2		c.5558T>G	p.Ile1853Arg	missense	Exon 38 of 64	NP_001073291.2	A0A087WYF1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
LAMA2	ENST00000421865.3	TSL:5 MANE Select	c.5558T>G	p.Ile1853Arg	missense	Exon 38 of 65	ENSP00000400365.2	P24043
LAMA2	ENST00000618192.5	TSL:5	c.5822T>G	p.Ile1941Arg	missense	Exon 39 of 66	ENSP00000480802.2	A0A087WX80
LAMA2	ENST00000617695.5	TSL:5	c.5558T>G	p.Ile1853Arg	missense	Exon 38 of 64	ENSP00000481744.2	A0A087WYF1

Frequencies

GnomAD3 genomes

AF:

0.000184

AC:

AN:

152188

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.00259

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000206

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.000236

AC:

AN:

250326

AF XY:

0.000170

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.000289

Gnomad ASJ exome

AF:

0.00259

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000142

Gnomad OTH exome

AF:

0.000655

GnomAD4 exome

AF:

0.000165

AC:

232

AN:

1403852

Hom.:

Cov.:

AF XY:

0.000167

AC XY:

117

AN XY:

701966

show subpopulations

African (AFR)

AF:

0.0000624

AC:

AN:

32074

American (AMR)

AF:

0.000336

AC:

AN:

44648

Ashkenazi Jewish (ASJ)

AF:

0.00237

AC:

AN:

25718

East Asian (EAS)

AF:

0.0000254

AC:

AN:

39396

South Asian (SAS)

AF:

0.00

AC:

AN:

85010

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53182

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5662

European-Non Finnish (NFE)

AF:

0.000126

AC:

134

AN:

1059656

Other (OTH)

AF:

0.000325

AC:

AN:

58506

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.443

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000184

AC:

AN:

152306

Hom.:

Cov.:

AF XY:

0.000175

AC XY:

AN XY:

74476

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41562

American (AMR)

AF:

0.000196

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00259

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000206

AC:

AN:

68020

Other (OTH)

AF:

0.000473

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.498

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000351

Hom.:

Bravo

AF:

0.000178

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.000173

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000119

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (3)

Congenital muscular dystrophy due to partial LAMA2 deficiency (1)

LAMA2-related disorder (1)

LAMA2-related muscular dystrophy (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.22

BayesDel_noAF

Benign

-0.25

CADD

Benign

(source)

DANN

Benign

0.96

DEOGEN2

Benign

0.057

Eigen

Benign

-0.018

Eigen_PC

Benign

0.042

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.81

M_CAP

Benign

0.016

MetaRNN

Benign

0.042

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.2

PhyloP100

2.9

PrimateAI

Benign

0.45

PROVEAN

Benign

-2.0

REVEL

Benign

0.12

Sift

Uncertain

0.018

Polyphen

0.71

Vest4

0.53

MVP

0.49

MPC

0.23

ClinPred

0.080

GERP RS

5.4

Varity_R

0.22

gMVP

0.51

Mutation Taster

=95/5

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over