rs3816665

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_000426.4(LAMA2):​c.1856G>A​(p.Arg619His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.16 in 1,595,278 control chromosomes in the GnomAD database, including 27,206 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.25 ( 7179 hom., cov: 32)
Exomes 𝑓: 0.15 ( 20027 hom. )

Consequence

LAMA2
NM_000426.4 missense

Scores

17

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:10

Conservation

PhyloP100: -1.57
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]

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4
Computational evidence support a benign effect (MetaRNN=3.9240298E-5).
BP6
Variant 6-129250185-G-A is Benign according to our data. Variant chr6-129250185-G-A is described in ClinVar as [Benign]. Clinvar id is 92943.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr6-129250185-G-A is described in Lovd as [Benign].
BA1
GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.527 is higher than 0.05.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
LAMA2NM_000426.4 linkuse as main transcriptc.1856G>A p.Arg619His missense_variant 13/65 ENST00000421865.3 NP_000417.3
LAMA2NM_001079823.2 linkuse as main transcriptc.1856G>A p.Arg619His missense_variant 13/64 NP_001073291.2

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
LAMA2ENST00000421865.3 linkuse as main transcriptc.1856G>A p.Arg619His missense_variant 13/655 NM_000426.4 ENSP00000400365
LAMA2ENST00000618192.5 linkuse as main transcriptc.1856G>A p.Arg619His missense_variant 13/665 ENSP00000480802 P1
LAMA2ENST00000617695.5 linkuse as main transcriptc.1856G>A p.Arg619His missense_variant 13/645 ENSP00000481744

Frequencies

GnomAD3 genomes
AF:
0.250
AC:
37925
AN:
151884
Hom.:
7155
Cov.:
32
show subpopulations
Gnomad AFR
AF:
0.533
Gnomad AMI
AF:
0.135
Gnomad AMR
AF:
0.135
Gnomad ASJ
AF:
0.153
Gnomad EAS
AF:
0.0903
Gnomad SAS
AF:
0.229
Gnomad FIN
AF:
0.192
Gnomad MID
AF:
0.168
Gnomad NFE
AF:
0.134
Gnomad OTH
AF:
0.211
GnomAD3 exomes
AF:
0.174
AC:
43614
AN:
251036
Hom.:
5258
AF XY:
0.172
AC XY:
23310
AN XY:
135702
show subpopulations
Gnomad AFR exome
AF:
0.542
Gnomad AMR exome
AF:
0.119
Gnomad ASJ exome
AF:
0.156
Gnomad EAS exome
AF:
0.0785
Gnomad SAS exome
AF:
0.234
Gnomad FIN exome
AF:
0.190
Gnomad NFE exome
AF:
0.136
Gnomad OTH exome
AF:
0.162
GnomAD4 exome
AF:
0.151
AC:
217711
AN:
1443276
Hom.:
20027
Cov.:
28
AF XY:
0.153
AC XY:
109798
AN XY:
719284
show subpopulations
Gnomad4 AFR exome
AF:
0.547
Gnomad4 AMR exome
AF:
0.122
Gnomad4 ASJ exome
AF:
0.157
Gnomad4 EAS exome
AF:
0.0952
Gnomad4 SAS exome
AF:
0.232
Gnomad4 FIN exome
AF:
0.184
Gnomad4 NFE exome
AF:
0.133
Gnomad4 OTH exome
AF:
0.167
GnomAD4 genome
AF:
0.250
AC:
37996
AN:
152002
Hom.:
7179
Cov.:
32
AF XY:
0.249
AC XY:
18520
AN XY:
74298
show subpopulations
Gnomad4 AFR
AF:
0.533
Gnomad4 AMR
AF:
0.134
Gnomad4 ASJ
AF:
0.153
Gnomad4 EAS
AF:
0.0899
Gnomad4 SAS
AF:
0.228
Gnomad4 FIN
AF:
0.192
Gnomad4 NFE
AF:
0.134
Gnomad4 OTH
AF:
0.211
Alfa
AF:
0.154
Hom.:
5506
Bravo
AF:
0.257
TwinsUK
AF:
0.136
AC:
506
ALSPAC
AF:
0.132
AC:
508
ESP6500AA
AF:
0.523
AC:
2304
ESP6500EA
AF:
0.140
AC:
1204
ExAC
AF:
0.183
AC:
22176
Asia WGS
AF:
0.200
AC:
697
AN:
3478

ClinVar

Significance: Benign
Submissions summary: Benign:10
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

not specified Benign:6
Benign, no assertion criteria providedclinical testingJoint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+-- -
Benign, no assertion criteria providedclinical testingClinical Genetics, Academic Medical Center-- -
Benign, criteria provided, single submitterclinical testingGenetic Services Laboratory, University of ChicagoAug 15, 2013- -
Benign, criteria provided, single submitterclinical testingEurofins Ntd Llc (ga)Jan 20, 2016- -
Benign, criteria provided, single submitterclinical testingGeneDxJan 05, 2016This 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 submitterclinical testingPreventionGenetics, part of Exact Sciences-- -
Merosin deficient congenital muscular dystrophy Benign:2
Benign, criteria provided, single submitterclinical testingAthena DiagnosticsApr 13, 2017- -
Benign, no assertion criteria providedclinical testingDiagnostic Laboratory, Department of Genetics, University Medical Center Groningen-- -
LAMA2-related muscular dystrophy Benign:1
Benign, criteria provided, single submitterclinical testingLabcorp Genetics (formerly Invitae), LabcorpFeb 01, 2024- -
Congenital muscular dystrophy due to partial LAMA2 deficiency Benign:1
Benign, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaJan 13, 2018This 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
AlphaMissense
Benign
0.062
BayesDel_addAF
Benign
-0.79
T
BayesDel_noAF
Benign
-0.76
CADD
Benign
0.0070
DANN
Benign
0.73
DEOGEN2
Benign
0.015
.;T;T
Eigen
Benign
-1.7
Eigen_PC
Benign
-1.7
FATHMM_MKL
Benign
0.012
N
LIST_S2
Benign
0.38
T;T;T
MetaRNN
Benign
0.000039
T;T;T
MetaSVM
Benign
-1.0
T
MutationAssessor
Benign
0.90
.;.;L
MutationTaster
Benign
1.0
P
PrimateAI
Benign
0.22
T
PROVEAN
Benign
0.050
.;.;N
REVEL
Benign
0.063
Sift
Benign
0.29
.;.;T
Polyphen
0.0
.;.;B
Vest4
0.030
MPC
0.11
ClinPred
0.0018
T
GERP RS
-5.1
Varity_R
0.022
gMVP
0.34

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.

Other links and lift over

dbSNP: rs3816665; hg19: chr6-129571330; COSMIC: COSV70358074; API