chr6-112130993-C-T

Position:

chr6-112130993-C-T

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBP6BS2

The NM_001105206.3(LAMA4):c.3943G>A(p.Val1315Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000411 in 1,613,042 control chromosomes in the GnomAD database, including 5 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00078 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00037 ( 4 hom. )

Consequence

LAMA4
NM_001105206.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:8

Conservation

PhyloP100: -0.00800

Variant links:

Genes affected

LAMA4 (HGNC:6484): (laminin subunit alpha 4) Laminins, a family of extracellular matrix glycoproteins, are the major noncollagenous constituent of basement membranes. They have been implicated in a wide variety of biological processes including cell adhesion, differentiation, migration, signaling, neurite outgrowth and metastasis. Laminins are composed of 3 non identical chains: laminin alpha, beta and gamma (formerly A, B1, and B2, respectively) and they form a cruciform structure consisting of 3 short arms, each formed by a different chain, and a long arm composed of all 3 chains. Each laminin chain is a multidomain protein encoded by a distinct gene. Several isoforms of each chain have been described. Different alpha, beta and gamma chain isomers combine to give rise to different heterotrimeric laminin isoforms which are designated by Arabic numerals in the order of their discovery, i.e. alpha1beta1gamma1 heterotrimer is laminin 1. The biological functions of the different chains and trimer molecules are largely unknown, but some of the chains have been shown to differ with respect to their tissue distribution, presumably reflecting diverse functions in vivo. This gene encodes the alpha chain isoform laminin, alpha 4. The domain structure of alpha 4 is similar to that of alpha 3, both of which resemble truncated versions of alpha 1 and alpha 2, in that approximately 1,200 residues at the N-terminus (domains IV, V and VI) have been lost. Laminin, alpha 4 contains the C-terminal G domain which distinguishes all alpha chains from the beta and gamma chains. The RNA analysis from adult and fetal tissues revealed developmental regulation of expression, however, the exact function of laminin, alpha 4 is not known. Tissue-specific utilization of alternative polyA-signal has been described in literature. Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Aug 2011]

LAMA4 links:

LOC107986633 (HGNC:):

LOC107986633 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0030601919).

BP6

Variant 6-112130993-C-T is Benign according to our data. Variant chr6-112130993-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 44380.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=2, Benign=4}. Variant chr6-112130993-C-T is described in Lovd as [Benign]. Variant chr6-112130993-C-T is described in Lovd as [Likely_benign].

BS2

High AC in GnomAd4 at 119 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LAMA4	NM_001105206.3 linkuse as main transcript	c.3943G>A	p.Val1315Ile	missense_variant	29/39	ENST00000230538.12
LOC107986633	XR_001744299.2 linkuse as main transcript	n.439+14566C>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LAMA4	ENST00000230538.12 linkuse as main transcript	c.3943G>A	p.Val1315Ile	missense_variant	29/39	1	NM_001105206.3	A1

Frequencies

GnomAD3 genomes

AF:

0.000782

AC:

119

AN:

152078

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000386

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.0166

Gnomad SAS

AF:

0.00165

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000883

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.00127

AC:

319

AN:

250794

Hom.:

AF XY:

0.00114

AC XY:

154

AN XY:

135518

show subpopulations

Gnomad AFR exome

AF:

0.000492

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0155

Gnomad SAS exome

AF:

0.000392

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.0000618

Gnomad OTH exome

AF:

0.000981

GnomAD4 exome

AF:

0.000372

AC:

544

AN:

1460846

Hom.:

Cov.:

AF XY:

0.000377

AC XY:

274

AN XY:

726752

show subpopulations

Gnomad4 AFR exome

AF:

0.000419

Gnomad4 AMR exome

AF:

0.0000448

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00923

Gnomad4 SAS exome

AF:

0.000557

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000360

Gnomad4 OTH exome

AF:

0.00119

GnomAD4 genome

AF:

0.000782

AC:

119

AN:

152196

Hom.:

Cov.:

AF XY:

0.000927

AC XY:

AN XY:

74428

show subpopulations

Gnomad4 AFR

AF:

0.000385

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.0166

Gnomad4 SAS

AF:

0.00166

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000883

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.000663

Hom.:

Bravo

AF:

0.000710

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00117

AC:

142

Asia WGS

AF:

0.00808

AC:

AN:

3478

EpiCase

AF:

0.000218

EpiControl

AF:

0.000178

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:8

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1Benign:3

Uncertain significance, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Jan 05, 2012	Variant classified as Uncertain Significance - Favor Benign. The Val1308Ile vari ant (LAMA4) has been identified in 2/46 chromosomes from an Asian population, 7/ 2334 chromosomes from the 1000 Genomes population, and 1/3738 chromosomes from a broad but clinically unspecified African American cohort (http://evs.gs.washing ton.edu/EVS, dbSNP rs70940811). Valine (Val) residue at position 1308 is not con served among mammals, suggesting that a change may be tolerated. Computational t ools (PolyPhen2, SIFT, AlignGVGD) also predict this change to be benign although their accuracy is unknown. In summary, this variant is more likely benign but additional information is needed to fully assess its clinical significance. -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Oct 16, 2014	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, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -

not provided

Uncertain:1Benign:2

Uncertain significance, criteria provided, single submitter	research	Biesecker Lab/Clinical Genomics Section, National Institutes of Health	Jun 24, 2013	- -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Likely benign, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -

Dilated cardiomyopathy 1JJ

Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Jan 17, 2024

- -

Cardiomyopathy

Benign:1

Benign, criteria provided, single submitter

clinical testing

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Mar 23, 2018

- -

Cardiovascular phenotype

Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

May 21, 2015

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.062

BayesDel_addAF

Benign

-0.48

BayesDel_noAF

Benign

-0.44

CADD

Benign

7.7

DANN

Benign

0.72

DEOGEN2

Benign

0.015

T;T;T;T

Eigen

Benign

-1.1

Eigen_PC

Benign

-0.96

FATHMM_MKL

Benign

0.23

LIST_S2

Benign

0.73

T;.;.;T

MetaRNN

Benign

0.0031

T;T;T;T

MetaSVM

Benign

-0.97

MutationTaster

Benign

0.94

N;N;N;N

PrimateAI

Benign

0.25

PROVEAN

Benign

-0.48

N;N;N;N

REVEL

Benign

0.22

Sift

Benign

0.23

T;T;T;T

Sift4G

Benign

1.0

T;T;T;T

Vest4

0.12

MVP

0.30

MPC

0.097

ClinPred

0.0038

GERP RS

-2.0

gMVP

0.13

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

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