rs113785045

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_006059.4(LAMC3):c.2987G>A(p.Arg996His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000249 in 1,595,748 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/20 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. R996C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00058 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00021 ( 2 hom. )

Consequence

LAMC3
NM_006059.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:5

Conservation

PhyloP100: -0.0570

Variant links:

Genes affected

LAMC3 (HGNC:6494): (laminin subunit gamma 3) 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 gamma chain isoform laminin, gamma 3. The gamma 3 chain is most similar to the gamma 1 chain, and contains all the 6 domains expected of the gamma chain. It is a component of laminin 12. The gamma 3 chain is broadly expressed in skin, heart, lung, and the reproductive tracts. In skin, it is seen within the basement membrane of the dermal-epidermal junction at points of nerve penetration. Gamma 3 is also a prominent element of the apical surface of ciliated epithelial cells of lung, oviduct, epididymis, ductus deferens, and seminiferous tubules. The distribution of gamma 3-containing laminins along ciliated epithelial surfaces suggests that the apical laminins are important in the morphogenesis and structural stability of the ciliated processes of these cells. [provided by RefSeq, Aug 2011]

LAMC3 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=0.020186871).

BP6

Variant 9-131069768-G-A is Benign according to our data. Variant chr9-131069768-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 435738.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=5, Uncertain_significance=1}. Variant chr9-131069768-G-A is described in Lovd as [Benign].

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000578 (88/152154) while in subpopulation AFR AF= 0.00154 (64/41432). AF 95% confidence interval is 0.00124. There are 0 homozygotes in gnomad4. There are 39 alleles in male gnomad4 subpopulation. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
LAMC3	NM_006059.4 linkuse as main transcript	c.2987G>A	p.Arg996His	missense_variant	17/28	ENST00000361069.9
LAMC3	XM_011518121.2 linkuse as main transcript	c.2987G>A	p.Arg996His	missense_variant	17/28
LAMC3	XM_006716921.3 linkuse as main transcript	c.2987G>A	p.Arg996His	missense_variant	17/23

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LAMC3	ENST00000361069.9 linkuse as main transcript	c.2987G>A	p.Arg996His	missense_variant	17/28	2	NM_006059.4	P1

Frequencies

GnomAD3 genomes

AF:

0.000578

AC:

AN:

152154

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00154

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00634

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000339

AC:

AN:

218256

Hom.:

AF XY:

0.000339

AC XY:

AN XY:

117868

show subpopulations

Gnomad AFR exome

AF:

0.00157

Gnomad AMR exome

AF:

0.0000322

Gnomad ASJ exome

AF:

0.00480

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000412

Gnomad OTH exome

AF:

0.000542

GnomAD4 exome

AF:

0.000214

AC:

309

AN:

1443594

Hom.:

Cov.:

AF XY:

0.000212

AC XY:

152

AN XY:

716406

show subpopulations

Gnomad4 AFR exome

AF:

0.00208

Gnomad4 AMR exome

AF:

0.0000475

Gnomad4 ASJ exome

AF:

0.00525

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000240

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000489

Gnomad4 OTH exome

AF:

0.000653

GnomAD4 genome

AF:

0.000578

AC:

AN:

152154

Hom.:

Cov.:

AF XY:

0.000525

AC XY:

AN XY:

74340

show subpopulations

Gnomad4 AFR

AF:

0.00154

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00634

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000371

Hom.:

Bravo

AF:

0.000563

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.00205

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.000305

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:5

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Benign:3

Likely benign, criteria provided, single submitter	clinical testing	Invitae	Jan 27, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Dec 13, 2018	This variant is associated with the following publications: (PMID: 30924900) -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jan 01, 2024	LAMC3: BP4 -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genetic Services Laboratory, University of Chicago

Feb 13, 2017

- -

LAMC3-related condition

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Feb 24, 2023

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 01, 2021

This alteration is classified as likely 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

0.064

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.46

Cadd

Benign

Dann

Uncertain

0.99

DEOGEN2

Benign

0.088

Eigen

Benign

-0.29

Eigen_PC

Benign

-0.23

FATHMM_MKL

Benign

0.46

LIST_S2

Benign

0.73

M_CAP

Benign

0.021

MetaRNN

Benign

0.020

MetaSVM

Benign

-0.87

MutationAssessor

Benign

1.6

MutationTaster

Benign

0.74

D;D

PrimateAI

Benign

0.26

PROVEAN

Uncertain

-2.4

REVEL

Benign

0.040

Sift

Benign

0.11

Sift4G

Benign

0.16

Polyphen

0.21

Vest4

0.29

MVP

0.75

MPC

0.21

ClinPred

0.026

GERP RS

2.0

Varity_R

0.055

gMVP

0.35

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.13

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