rs35818148

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_020944.3(GBA2):c.1495G>A(p.Glu499Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000096 in 1,613,808 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000092 ( 0 hom. )

Consequence

GBA2
NM_020944.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 2.71

Variant links:

Genes affected

GBA2 (HGNC:18986): (glucosylceramidase beta 2) This gene encodes a microsomal beta-glucosidase that catalyzes the hydrolysis of bile acid 3-O-glucosides as endogenous compounds. Studies to determine subcellular localization of this protein in the liver indicated that the enzyme was mainly enriched in the microsomal fraction where it appeared to be confined to the endoplasmic reticulum. This putative transmembrane protein is thought to play a role in carbohydrate transport and metabolism. [provided by RefSeq, Jul 2008]

GBA2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.12332639).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GBA2	NM_020944.3 linkuse as main transcript	c.1495G>A	p.Glu499Lys	missense_variant	9/17	ENST00000378103.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GBA2	ENST00000378103.7 linkuse as main transcript	c.1495G>A	p.Glu499Lys	missense_variant	9/17	1	NM_020944.3	P1	Q9HCG7-1
GBA2	ENST00000378094.4 linkuse as main transcript	c.1495G>A	p.Glu499Lys	missense_variant	9/17	1			Q9HCG7-2
GBA2	ENST00000467252.5 linkuse as main transcript	n.1067G>A		non_coding_transcript_exon_variant	6/13	1

Frequencies

GnomAD3 genomes

AF:

0.000131

AC:

AN:

152178

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

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:

0.000250

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000123

AC:

AN:

251374

Hom.:

AF XY:

0.000147

AC XY:

AN XY:

135860

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000298

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000237

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000924

AC:

135

AN:

1461630

Hom.:

Cov.:

AF XY:

0.0000908

AC XY:

AN XY:

727122

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.000459

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000106

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.000131

AC:

AN:

152178

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74332

show subpopulations

Gnomad4 AFR

AF:

0.0000724

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:

0.000250

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000186

Hom.:

Bravo

AF:

0.0000945

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000349

AC:

ExAC

AF:

0.000148

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.000415

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Spastic paraplegia

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Sep 27, 2022

This sequence change replaces glutamic acid, which is acidic and polar, with lysine, which is basic and polar, at codon 499 of the GBA2 protein (p.Glu499Lys). This variant is present in population databases (rs35818148, gnomAD 0.03%). This missense change has been observed in individual(s) with dystonia, hypertonia, arachnoid cyst, and global developmental delay (PMID: 29453417). ClinVar contains an entry for this variant (Variation ID: 437457). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. 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

CeGaT Center for Human Genetics Tuebingen

Jan 01, 2021

- -

Hereditary spastic paraplegia 5A

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genomic Research Center, Shahid Beheshti University of Medical Sciences

Jun 18, 2017

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.088

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Benign

-0.24

Cadd

Benign

Dann

Uncertain

1.0

DEOGEN2

Benign

0.37

T;.

Eigen

Benign

-0.23

Eigen_PC

Benign

-0.15

FATHMM_MKL

Benign

0.75

LIST_S2

Uncertain

0.86

D;D

M_CAP

Benign

0.0089

MetaRNN

Benign

0.12

T;T

MetaSVM

Benign

-0.95

MutationAssessor

Benign

2.0

M;M

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Benign

0.39

PROVEAN

Benign

-1.1

N;N

REVEL

Benign

0.12

Sift

Benign

0.14

T;T

Sift4G

Benign

0.22

T;T

Polyphen

0.36

B;B

Vest4

0.33

MVP

0.60

MPC

0.33

ClinPred

0.066

GERP RS

5.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.2

Varity_R

0.15

gMVP

0.63

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