rs75992359

Positions:

• chr6-112214000-C-T

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The ENST00000431543.6(LAMA4):​c.368G>A​(p.Arg123Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00679 in 758,944 control chromosomes in the GnomAD database, including 131 homozygotes. In-silico tool predicts a benign outcome for this variant. 11/13 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.019 (89 hom., cov: 32)
  • Exomes 𝑓: 0.0036 (42 hom.)
• Consequence: LAMA4 ENST00000431543.6 missense
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.722

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 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.0020734668).
• BP6: Variant 6-112214000-C-T is Benign according to our data. Variant chr6-112214000-C-T is described in ClinVar as [Benign]. Clinvar id is 192187.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0614 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
LAMA4	NM_001105206.3	c.297+2368G>A		intron_variant		ENST00000230538.12	NP_001098676.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
LAMA4	ENST00000230538.12	c.297+2368G>A		intron_variant		1	NM_001105206.3	ENSP00000230538.7

Frequencies

GnomAD3 genomes AF: 0.0194 AC: 2948 AN: 152138 Hom.: 88 Cov.: 32

Gnomad AFR AF: 0.0633

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00955

Gnomad ASJ AF: 0.0291

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000828

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00949

Gnomad NFE AF: 0.000661

Gnomad OTH AF: 0.0139

GnomAD3 exomes AF: 0.00553 AC: 1279 AN: 231458 Hom.: 29 AF XY: 0.00460 AC XY: 587 AN XY: 127744

Gnomad AFR exome AF: 0.0618

Gnomad AMR exome AF: 0.00327

Gnomad ASJ exome AF: 0.0250

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000277

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000736

Gnomad OTH exome AF: 0.00284

GnomAD4 exome AF: 0.00361 AC: 2192 AN: 606688 Hom.: 42 Cov.: 0 AF XY: 0.00299 AC XY: 991 AN XY: 331970

Gnomad4 AFR exome AF: 0.0583

Gnomad4 AMR exome AF: 0.00426

Gnomad4 ASJ exome AF: 0.0258

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000210

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000635

Gnomad4 OTH exome AF: 0.00821

GnomAD4 genome AF: 0.0194 AC: 2960 AN: 152256 Hom.: 89 Cov.: 32 AF XY: 0.0186 AC XY: 1382 AN XY: 74460

Gnomad4 AFR AF: 0.0634

Gnomad4 AMR AF: 0.00954

Gnomad4 ASJ AF: 0.0291

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000829

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000662

Gnomad4 OTH AF: 0.0137

Alfa AF: 0.0713 Hom.: 2371

Bravo AF: 0.0219

TwinsUK AF: 0.000809 AC: 3

ALSPAC AF: 0.000259 AC: 1

ESP6500AA AF: 0.0576 AC: 101

ESP6500EA AF: 0.00151 AC: 6

ExAC AF: 0.00575 AC: 667

Asia WGS AF: 0.00577 AC: 20 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Benign:1

Benign, criteria provided, single submitter

research

Biesecker Lab/Clinical Genomics Section, National Institutes of Health

Jun 24, 2013

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.64	T
BayesDel_noAF	Benign	-0.64
CADD	Benign	4.7
DANN	Benign	0.87
Eigen	Benign	-0.93
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.077	N
LIST_S2	Benign	0.34	T
MetaRNN	Benign	0.0021	T
MetaSVM	Benign	-1.0	T
PROVEAN	Benign	-0.44	N
REVEL	Benign	0.025
Sift	Pathogenic	0.0	D
Polyphen		0.021	B
Vest4		0.068
MVP		0.34
ClinPred		0.022	T
GERP RS		-0.86

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

Other links and lift over

dbSNP: rs75992359; hg19: chr6-112535201;