chr3-54918700-C-A

Position:

chr3-54918700-C-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_020678.4(LRTM1):c.797G>T(p.Arg266Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000883 in 1,614,150 control chromosomes in the GnomAD database, including 9 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0048 ( 5 hom., cov: 31)

Exomes 𝑓: 0.00048 ( 4 hom. )

Consequence

LRTM1
NM_020678.4 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -0.614

Variant links:

Genes affected

LRTM1 (HGNC:25023): (leucine rich repeats and transmembrane domains 1) 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]

LRTM1 links:

CACNA2D3 (HGNC:15460): (calcium voltage-gated channel auxiliary subunit alpha2delta 3) 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]

CACNA2D3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0038592517).

BP6

Variant 3-54918700-C-A is Benign according to our data. Variant chr3-54918700-C-A is described in ClinVar as [Benign]. Clinvar id is 791931.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00479 (730/152270) while in subpopulation AFR AF= 0.0167 (693/41558). AF 95% confidence interval is 0.0156. There are 5 homozygotes in gnomad4. There are 351 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 5 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
LRTM1	NM_020678.4 link	c.797G>T	p.Arg266Leu	missense_variant	3/3	ENST00000273286.6	NP_065729.1	Q9HBL6-1
CACNA2D3	NM_018398.3 link	c.2449+18832C>A		intron_variant		ENST00000474759.6	NP_060868.2	Q8IZS8-1
LRTM1	NM_001304389.2 link	c.569G>T	p.Arg190Leu	missense_variant	3/3		NP_001291318.1	Q9HBL6-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
LRTM1	ENST00000273286.6 link	c.797G>T	p.Arg266Leu	missense_variant	3/3	1	NM_020678.4	ENSP00000273286.5		Q9HBL6-1
CACNA2D3	ENST00000474759.6 link	c.2449+18832C>A		intron_variant		1	NM_018398.3	ENSP00000419101.1		Q8IZS8-1

Frequencies

GnomAD3 genomes

AF:

0.00479

AC:

729

AN:

152150

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0167

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00144

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:

0.000103

Gnomad OTH

AF:

0.00382

GnomAD3 exomes

AF:

0.00115

AC:

290

AN:

251278

Hom.:

AF XY:

0.000832

AC XY:

113

AN XY:

135814

show subpopulations

Gnomad AFR exome

AF:

0.0169

Gnomad AMR exome

AF:

0.000318

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:

0.000476

AC:

696

AN:

1461880

Hom.:

Cov.:

AF XY:

0.000381

AC XY:

277

AN XY:

727238

show subpopulations

Gnomad4 AFR exome

AF:

0.0173

Gnomad4 AMR exome

AF:

0.000402

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:

0.0000378

Gnomad4 OTH exome

AF:

0.000861

GnomAD4 genome

AF:

0.00479

AC:

730

AN:

152270

Hom.:

Cov.:

AF XY:

0.00471

AC XY:

351

AN XY:

74456

show subpopulations

Gnomad4 AFR

AF:

0.0167

Gnomad4 AMR

AF:

0.00144

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000103

Gnomad4 OTH

AF:

0.00378

Alfa

AF:

0.000387

Hom.:

Bravo

AF:

0.00540

ESP6500AA

AF:

0.0161

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00135

AC:

164

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Dec 31, 2019	- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.092

BayesDel_addAF

Benign

-0.65

BayesDel_noAF

Benign

-0.70

CADD

Benign

0.48

DANN

Benign

0.90

DEOGEN2

Benign

0.0041

T;.

Eigen

Benign

-0.89

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.20

LIST_S2

Benign

0.48

T;T

MetaRNN

Benign

0.0039

T;T

MetaSVM

Benign

-0.95

MutationAssessor

Benign

1.8

L;.

PrimateAI

Benign

0.22

PROVEAN

Benign

-0.56

N;N

REVEL

Benign

0.049

Sift

Benign

0.16

T;T

Sift4G

Benign

0.26

T;T

Polyphen

0.25

B;.

Vest4

0.063

MVP

0.38

MPC

0.017

ClinPred

0.0034

GERP RS

-2.3

Varity_R

0.042

gMVP

0.39

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