rs139633545

Positions:

chrX-120431414-A-G

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP6BS2

The NM_002294.3(LAMP2):c.1142T>C(p.Val381Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000546 in 1,209,735 control chromosomes in the GnomAD database, including 1 homozygotes. There are 21 hemizygotes in GnomAD. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00023 ( 0 hom., 7 hem., cov: 23)

Exomes 𝑓: 0.000036 ( 1 hom. 14 hem. )

Consequence

LAMP2
NM_002294.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:4

Conservation

PhyloP100: 8.51

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 -5 ACMG points.

BP6

Variant X-120431414-A-G is Benign according to our data. Variant chrX-120431414-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 180882.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Benign=2, Uncertain_significance=2}. Variant chrX-120431414-A-G is described in Lovd as [Benign]. Variant chrX-120431414-A-G is described in Lovd as [Likely_benign].

BS2

High Hemizygotes in GnomAd4 at 7 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
LAMP2	NM_002294.3 linkuse as main transcript	c.1142T>C	p.Val381Ala	missense_variant	9/9	ENST00000200639.9	NP_002285.1
LAMP2	NM_001122606.1 linkuse as main transcript	c.1094-2788T>C		intron_variant			NP_001116078.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
LAMP2	ENST00000200639.9 linkuse as main transcript	c.1142T>C	p.Val381Ala	missense_variant	9/9	1	NM_002294.3	ENSP00000200639	P3	P13473-1
LAMP2	ENST00000434600.6 linkuse as main transcript	c.1094-2788T>C		intron_variant		1		ENSP00000408411	A1	P13473-3
LAMP2	ENST00000706600.1 linkuse as main transcript	c.*1001T>C		3_prime_UTR_variant	9/9			ENSP00000516464
LAMP2	ENST00000486593.5 linkuse as main transcript	c.*127T>C		3_prime_UTR_variant, NMD_transcript_variant	7/7	5		ENSP00000431526

Frequencies

GnomAD3 genomes

AF:

0.000232

AC:

AN:

112272

Hom.:

Cov.:

AF XY:

0.000203

AC XY:

AN XY:

34446

show subpopulations

Gnomad AFR

AF:

0.000711

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000555

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00133

GnomAD3 exomes

AF:

0.000116

AC:

AN:

181255

Hom.:

AF XY:

0.000119

AC XY:

AN XY:

67135

show subpopulations

Gnomad AFR exome

AF:

0.00106

Gnomad AMR exome

AF:

0.0000730

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000361

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000364

AC:

AN:

1097463

Hom.:

Cov.:

AF XY:

0.0000386

AC XY:

AN XY:

362985

show subpopulations

Gnomad4 AFR exome

AF:

0.000265

Gnomad4 AMR exome

AF:

0.0000568

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000132

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.000586

GnomAD4 genome

AF:

0.000232

AC:

AN:

112272

Hom.:

Cov.:

AF XY:

0.000203

AC XY:

AN XY:

34446

show subpopulations

Gnomad4 AFR

AF:

0.000711

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000555

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00133

Alfa

AF:

0.000125

Hom.:

Bravo

AF:

0.000253

ESP6500AA

AF:

0.00156

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000165

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Mar 23, 2015

Variant classified as Uncertain Significance - Favor Benign. The p.Val381Ala var iant in LAMP2 has not been previously reported in individuals with cardiomyopath y or Danon disease, but has been identified in 0.1% (11/8513) African chromosome s, including 3 hemizygotes, by the Exome Aggregation Consortium (ExAC, http://ex ac.broadinstitute.org; dbSNP rs139633545). Computational prediction tools and co nservation analysis suggest that this variant may impact the protein, though thi s information is not predictive enough to determine pathogenicity. In summary, w hile the clinical significance of the p.Val381Ala variant is uncertain, its freq uency and presence in multiple hemizygous control individuals suggests that it is more likely to be benign. -

Cardiomyopathy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

May 11, 2021

- -

Danon disease

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 11, 2024

- -

LAMP2-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Nov 17, 2020

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

not provided

Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Oct 02, 2020

- -

Cardiovascular phenotype

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 18, 2019

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.52

CardioboostCm

Benign

0.062

BayesDel_addAF

Uncertain

0.081

BayesDel_noAF

Pathogenic

0.29

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.46

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.88

M_CAP

Pathogenic

0.44

MetaRNN

Uncertain

0.56

MetaSVM

Uncertain

-0.058

MutationAssessor

Pathogenic

3.1

MutationTaster

Benign

1.0

D;D;D

PROVEAN

Uncertain

-3.9

REVEL

Pathogenic

0.65

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.73

MVP

0.96

ClinPred

0.22

GERP RS

5.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.89

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.14

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