rs766491800

chrX-120449083-T-C

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BP4

The NM_002294.3(LAMP2):c.443A>G(p.Asn148Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000116 in 1,202,195 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 4 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., 1 hem., cov: 23)

Exomes 𝑓: 0.0000073 ( 0 hom. 3 hem. )

Consequence

LAMP2
NM_002294.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 2.19

Variant links:

Genes affected

LAMP2 (HGNC:6501): (lysosomal associated membrane protein 2) The protein encoded by this gene is a member of a family of membrane glycoproteins. This glycoprotein provides selectins with carbohydrate ligands. It may play a role in tumor cell metastasis. It may also function in the protection, maintenance, and adhesion of the lysosome. Alternative splicing of this gene results in multiple transcript variants encoding distinct proteins. [provided by RefSeq, Jul 2008]

LAMP2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.31337184).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
LAMP2	NM_002294.3 linkuse as main transcript	c.443A>G	p.Asn148Ser	missense_variant	4/9	ENST00000200639.9
LAMP2	NM_001122606.1 linkuse as main transcript	c.443A>G	p.Asn148Ser	missense_variant	4/9
LAMP2	NM_013995.2 linkuse as main transcript	c.443A>G	p.Asn148Ser	missense_variant	4/9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LAMP2	ENST00000200639.9 linkuse as main transcript	c.443A>G	p.Asn148Ser	missense_variant	4/9	1	NM_002294.3	P3	P13473-1

Frequencies

GnomAD3 genomes

AF:

0.0000533

AC:

AN:

112554

Hom.:

Cov.:

AF XY:

0.0000288

AC XY:

AN XY:

34686

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.000112

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000164

AC:

AN:

182411

Hom.:

AF XY:

0.0000149

AC XY:

AN XY:

66985

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000368

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000734

AC:

AN:

1089641

Hom.:

Cov.:

AF XY:

0.00000845

AC XY:

AN XY:

355229

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000959

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000533

AC:

AN:

112554

Hom.:

Cov.:

AF XY:

0.0000288

AC XY:

AN XY:

34686

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000112

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000453

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Danon disease

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Aug 11, 2021	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Aug 29, 2022	This sequence change replaces asparagine, which is neutral and polar, with serine, which is neutral and polar, at codon 148 of the LAMP2 protein (p.Asn148Ser). This variant is present in population databases (rs766491800, gnomAD 0.004%), including at least one homozygous and/or hemizygous individual. This variant has not been reported in the literature in individuals affected with LAMP2-related conditions. ClinVar contains an entry for this variant (Variation ID: 578311). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jul 11, 2019

Has not been previously published as pathogenic or benign to our knowledge; In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 12, 2023

The p.N148S variant (also known as c.443A>G), located in coding exon 4 of the LAMP2 gene, results from an A to G substitution at nucleotide position 443. The asparagine at codon 148 is replaced by serine, an amino acid with highly similar properties. Based on data from gnomAD, the G allele has an overall frequency of 0.0016% (3/182411) total alleles studied, with 1 hemizygote(s) observed. The highest observed frequency was 0.0037% (3/81412) of European (non-Finnish) alleles. This amino acid position is not well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.088

CardioboostCm

Benign

0.053

BayesDel_addAF

Benign

-0.47

BayesDel_noAF

Benign

-0.81

Cadd

Benign

Dann

Uncertain

0.99

FATHMM_MKL

Benign

0.40

LIST_S2

Benign

0.79

T;T;T

M_CAP

Benign

0.033

MetaRNN

Benign

0.31

T;T;T

MetaSVM

Benign

-0.96

MutationAssessor

Pathogenic

3.0

M;M;M

MutationTaster

Benign

1.0

N;N;N;N;N

PrimateAI

Benign

0.44

PROVEAN

Uncertain

-2.9

D;D;D

REVEL

Benign

0.083

Sift

Uncertain

0.010

D;D;D

Sift4G

Uncertain

0.023

D;D;D

Polyphen

0.93, 0.92

.;P;P

Vest4

0.32

MutPred

0.66

Loss of stability (P = 0.0641);Loss of stability (P = 0.0641);Loss of stability (P = 0.0641);

MVP

0.60

MPC

0.50

ClinPred

0.65

GERP RS

1.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.13

gMVP

0.41

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