Genetic Variant LGI1:p.Arg18Ile (chr10-93758197-G-T) – 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_005097.4(LGI1):c.53G>T(p.Arg18Ile) variant causes a missense change. The variant allele was found at a frequency of 0.00000274 in 1,461,888 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. R18K) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

LGI1
NM_005097.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 6.02

Publications

0 publications found

Variant links:

Genes affected

LGI1 (HGNC:6572): (leucine rich glioma inactivated 1) This gene encodes a member of the secreted leucine-rich repeat (LRR) superfamily and shares homology with members of the SLIT protein family. The encoded protein may regulate the activity of voltage-gated potassium channels and may be involved in neuronal growth regulation and cell survival. This gene is rearranged as a result of translocations in glioblastoma cell lines, and it is frequently down-regulated or rearranged in malignant gliomas. Mutations in this gene result in autosomal dominant lateral temporal epilepsy. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Apr 2015]

LGI1 Gene-Disease associations (from GenCC):

autosomal dominant epilepsy with auditory features
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
epilepsy, familial temporal lobe, 1
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)

LGI1 links:

ENSG00000303320 (HGNC:):

ENSG00000303320 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
LGI1	NM_005097.4 link	c.53G>T	p.Arg18Ile	missense_variant	Exon 1 of 8	ENST00000371418.9	NP_005088.1	O95970-1A0A0S2Z4S7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LGI1	ENST00000371418.9 link	c.53G>T	p.Arg18Ile	missense_variant	Exon 1 of 8	1	NM_005097.4	ENSP00000360472.4		O95970-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461888

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727244

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000360

AC:

AN:

1112008

Other (OTH)

AF:

0.00

AC:

AN:

60396

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

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Uncertain

0.079

BayesDel_noAF

Benign

-0.12

CADD

Uncertain

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.34

T;.;.;.;.;T;T;.

Eigen

Benign

0.12

Eigen_PC

Uncertain

0.26

FATHMM_MKL

Uncertain

0.90

LIST_S2

Uncertain

0.97

D;D;.;.;D;D;D;D

M_CAP

Benign

0.024

MetaRNN

Uncertain

0.48

T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.53

MutationAssessor

Benign

1.3

L;.;.;.;L;.;.;L

PhyloP100

6.0

PrimateAI

Uncertain

0.59

PROVEAN

Benign

-1.1

N;.;.;.;.;.;.;N

REVEL

Benign

0.26

Sift

Benign

0.099

T;.;.;.;.;.;.;T

Sift4G

Benign

0.29

T;T;T;T;T;.;T;T

Polyphen

0.30

B;.;.;.;B;.;.;P

Vest4

0.36

MutPred

0.60

Loss of MoRF binding (P = 0.016);Loss of MoRF binding (P = 0.016);Loss of MoRF binding (P = 0.016);Loss of MoRF binding (P = 0.016);Loss of MoRF binding (P = 0.016);Loss of MoRF binding (P = 0.016);Loss of MoRF binding (P = 0.016);Loss of MoRF binding (P = 0.016);

MVP

0.84

MPC

1.5

ClinPred

0.77

GERP RS

4.7

PromoterAI

-0.12

Neutral

(source)

Varity_R

0.18

gMVP

0.62

Mutation Taster

=72/28

polymorphism

(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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10-93758197-G-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over