Genetic Variant LGI4:p.Trp288Leu (chr19-35126706-C-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_139284.3(LGI4):c.863G>T(p.Trp288Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000182 in 1,538,512 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. W288S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000017 ( 0 hom. )

Consequence

LGI4
NM_139284.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.97

Publications

0 publications found

Variant links:

Genes affected

LGI4 (HGNC:18712): (leucine rich repeat LGI family member 4) Involved in regulation of myelination. Predicted to be located in extracellular region. Predicted to be active in extracellular space. Implicated in arthrogryposis multiplex congenita-1 and childhood absence epilepsy. [provided by Alliance of Genome Resources, Apr 2022]

LGI4 Gene-Disease associations (from GenCC):

arthrogryposis multiplex congenita 1, neurogenic, with myelin defect
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
hypomyelination neuropathy-arthrogryposis syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

LGI4 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LGI4	NM_139284.3 link	c.863G>T	p.Trp288Leu	missense_variant	Exon 8 of 9	ENST00000310123.8	NP_644813.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LGI4	ENST00000310123.8 link	c.863G>T	p.Trp288Leu	missense_variant	Exon 8 of 9	1	NM_139284.3	ENSP00000312273.3

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152208

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.000955

GnomAD2 exomes

AF:

0.00000747

AC:

AN:

133840

AF XY:

0.0000137

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000245

GnomAD4 exome

AF:

0.0000173

AC:

AN:

1386186

Hom.:

Cov.:

AF XY:

0.0000161

AC XY:

AN XY:

684194

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31766

American (AMR)

AF:

0.00

AC:

AN:

35698

Ashkenazi Jewish (ASJ)

AF:

0.0000398

AC:

AN:

25142

East Asian (EAS)

AF:

0.00

AC:

AN:

35990

South Asian (SAS)

AF:

0.0000252

AC:

AN:

79262

European-Finnish (FIN)

AF:

0.00

AC:

AN:

35698

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5502

European-Non Finnish (NFE)

AF:

0.0000195

AC:

AN:

1079218

Other (OTH)

AF:

0.00

AC:

AN:

57910

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.490

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:

0.0000263

AC:

AN:

152326

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74482

show subpopulations

African (AFR)

AF:

0.0000240

AC:

AN:

41582

American (AMR)

AF:

0.00

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5166

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10630

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68022

Other (OTH)

AF:

0.000945

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

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:

0.00

Hom.:

Bravo

AF:

0.0000227

ExAC

AF:

0.0000315

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.57

BayesDel_addAF

Uncertain

0.060

BayesDel_noAF

Benign

-0.27

CADD

Benign

(source)

DANN

Benign

0.95

Eigen

Benign

-0.17

Eigen_PC

Benign

-0.15

FATHMM_MKL

Benign

0.59

LIST_S2

Benign

0.37

M_CAP

Pathogenic

0.59

MetaRNN

Uncertain

0.57

MetaSVM

Benign

-0.71

PhyloP100

2.0

PROVEAN

Uncertain

-2.6

REVEL

Benign

0.27

Sift

Uncertain

0.0010

Vest4

0.51

MutPred

0.23

Gain of MoRF binding (P = 0.0479);

MVP

0.72

ClinPred

0.43

GERP RS

3.3

Varity_R

0.18

Mutation Taster

=49/51

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over