chr12-1831276-C-T

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_001039029.3(LRTM2):c.409C>T(p.Arg137Trp) variant causes a missense change. The variant allele was found at a frequency of 0.000124 in 1,613,588 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00013 ( 0 hom. )

Consequence

LRTM2
NM_001039029.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.49

Variant links:

Genes affected

LRTM2 (HGNC:32443): (leucine rich repeats and transmembrane domains 2) Predicted to enable Roundabout binding activity and heparin binding activity. Predicted to be involved in axon guidance and negative chemotaxis. Predicted to act upstream of or within positive regulation of synapse assembly. Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

LRTM2 links:

CACNA2D4 (HGNC:20202): (calcium voltage-gated channel auxiliary subunit alpha2delta 4) This gene encodes a member of the alpha-2/delta subunit family, a protein in the voltage-dependent calcium channel complex. Calcium channels mediate the influx of calcium ions into the cell upon membrane polarization and consist of a complex of alpha-1, alpha-2/delta, beta, and gamma subunits in a 1:1:1:1 ratio. Various versions of each of these subunits exist, either expressed from similar genes or the result of alternative splicing. Research on a highly similar protein in rabbit suggests the protein described in this record is cleaved into alpha-2 and delta subunits. Alternate transcriptional splice variants of this gene have been observed but have not been thoroughly characterized. [provided by RefSeq, Jul 2008]

CACNA2D4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.26050878).

BS2

High AC in GnomAd4 at 7 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LRTM2	NM_001039029.3 link	c.409C>T	p.Arg137Trp	missense_variant	Exon 4 of 5	ENST00000299194.6	NP_001034118.1	Q8N967
CACNA2D4	NM_172364.5 link	c.2551+9463G>A		intron_variant	Intron 26 of 37	ENST00000382722.10	NP_758952.4	Q7Z3S7-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
LRTM2	ENST00000299194.6 link	c.409C>T	p.Arg137Trp	missense_variant	Exon 4 of 5	2	NM_001039029.3	ENSP00000299194.1	Q8N967
CACNA2D4	ENST00000382722.10 link	c.2551+9463G>A		intron_variant	Intron 26 of 37	1	NM_172364.5	ENSP00000372169.4	Q7Z3S7-1
CACNA2D4	ENST00000586184.5 link	c.2551+9463G>A		intron_variant	Intron 26 of 36	5		ENSP00000465060.1	Q7Z3S7-5
CACNA2D4	ENST00000587995.5 link	c.2476+9463G>A		intron_variant	Intron 25 of 36	5		ENSP00000465372.1	K7EJY1
CACNA2D4	ENST00000585708.5 link	c.2359+9463G>A		intron_variant	Intron 26 of 36	5		ENSP00000467697.1	Q7Z3S7-6
CACNA2D4	ENST00000588077.5 link	c.2359+9463G>A		intron_variant	Intron 26 of 37	5		ENSP00000468530.1	Q7Z3S7-4
CACNA2D4	ENST00000444595.6 link	n.*797+9463G>A		intron_variant	Intron 26 of 36	1		ENSP00000403371.2	E7EUE0
CACNA2D4	ENST00000537784.5 link	n.391+9463G>A		intron_variant	Intron 4 of 14	1		ENSP00000440231.2	X6RLU5

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152224

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000239

AC:

AN:

250562

Hom.:

AF XY:

0.0000295

AC XY:

AN XY:

135614

show subpopulations

Gnomad AFR exome

AF:

0.0000620

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000440

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000132

AC:

193

AN:

1461364

Hom.:

Cov.:

AF XY:

0.000125

AC XY:

AN XY:

727038

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000166

Gnomad4 OTH exome

AF:

0.0000994

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152224

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74362

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000169

Hom.:

Bravo

AF:

0.0000604

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Sep 29, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.409C>T (p.R137W) alteration is located in exon 4 (coding exon 2) of the LRTM2 gene. This alteration results from a C to T substitution at nucleotide position 409, causing the arginine (R) at amino acid position 137 to be replaced by a tryptophan (W). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.089

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Benign

-0.36

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.059

T;T;T

Eigen

Uncertain

0.36

Eigen_PC

Uncertain

0.36

FATHMM_MKL

Benign

0.37

M_CAP

Benign

0.061

MetaRNN

Benign

0.26

T;T;T

MetaSVM

Benign

-0.53

MutationAssessor

Benign

1.4

L;L;L

PrimateAI

Benign

0.32

PROVEAN

Benign

-2.2

N;N;N

REVEL

Benign

0.16

Sift

Uncertain

0.016

D;D;D

Sift4G

Uncertain

0.016

D;D;D

Polyphen

0.93

P;P;P

Vest4

0.32

MVP

0.37

MPC

0.59

ClinPred

0.52

GERP RS

4.3

Varity_R

0.11

gMVP

0.58

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

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