rs80356763

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Pathogenic. The variant received 13 ACMG points: 13P and 0B. PM1PM2PM5PP2PP3_StrongPP5_Moderate

The NM_000157.4(GBA1):c.509G>T(p.Arg170Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,658 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R170H) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 29)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

GBA1
NM_000157.4 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:2O:1

Conservation

PhyloP100: 2.05

Publications

17 publications found

Variant links:

Genes affected

GBA1 (HGNC:4177): (glucosylceramidase beta 1) This gene encodes a lysosomal membrane protein that cleaves the beta-glucosidic linkage of glycosylceramide, an intermediate in glycolipid metabolism. Mutations in this gene cause Gaucher disease, a lysosomal storage disease characterized by an accumulation of glucocerebrosides. A related pseudogene is approximately 12 kb downstream of this gene on chromosome 1. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2010]

GBA1 Gene-Disease associations (from GenCC):

Parkinson disease
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
Gaucher disease
Inheritance: AR Classification: DEFINITIVE Submitted by: Myriad Women’s Health, ClinGen
Gaucher disease perinatal lethal
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Laboratory for Molecular Medicine, Genomics England PanelApp
late-onset Parkinson disease
Inheritance: AD Classification: STRONG, LIMITED Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics
Gaucher disease type I
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Orphanet
Gaucher disease type II
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Genomics England PanelApp
Gaucher disease type III
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Orphanet
Gaucher disease-ophthalmoplegia-cardiovascular calcification syndrome
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Orphanet

GBA1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 13 ACMG points.

PM1

In a hotspot region, there are 10 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 2 uncertain in NM_000157.4

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr1-155238596-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 813341.

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 94 curated pathogenic missense variants (we use a threshold of 10). The gene has 3 curated benign missense variants. Gene score misZ: 1.1739 (below the threshold of 3.09). Trascript score misZ: 2.2879 (below the threshold of 3.09). GenCC associations: The gene is linked to late-onset Parkinson disease, Gaucher disease perinatal lethal, Gaucher disease, Gaucher disease type I, Gaucher disease-ophthalmoplegia-cardiovascular calcification syndrome, Gaucher disease type II, Parkinson disease, Gaucher disease type III.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.989

PP5

Variant 1-155238596-C-A is Pathogenic according to our data. Variant chr1-155238596-C-A is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 4329.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GBA1	NM_000157.4 link	c.509G>T	p.Arg170Leu	missense_variant	Exon 5 of 11	ENST00000368373.8	NP_000148.2	P04062-1A0A068F658

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GBA1	ENST00000368373.8 link	c.509G>T	p.Arg170Leu	missense_variant	Exon 5 of 11	1	NM_000157.4	ENSP00000357357.3		P04062-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251178

AF XY:

0.00000737

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS 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:

6.84e-7

AC:

AN:

1461658

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727142

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33472

American (AMR)

AF:

0.0000224

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86246

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111832

Other (OTH)

AF:

0.00

AC:

AN:

60378

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000121

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2Other:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Gaucher disease

Pathogenic:1Other:1

GeneReviews

Significance:not provided

Review Status:no classification provided

Collection Method:literature only

- -

Jan 13, 2020

Broad Center for Mendelian Genomics, Broad Institute of MIT and Harvard

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:curation

The p.Arg170Leu variant in GBA has been reported in 2 individuals with Gaucher disease, segregated with disease in 2 affected relatives from 1 family (PMID: 10685993), and has been identified in 0.003% (1/34592) of Latino chromosomes by the Genome Aggregation Database (gnomAD, http://gnomad.broadinstitute.org; dbSNP rs80356763). Although this variant has been seen in the general population, its frequency is low enough to be consistent with a recessive carrier frequency. This variant has also been reported in ClinVar (VariationID: 4329) as pathogenic by OMIM. Computational prediction tools and conservation analyses suggest that this variant may impact the protein, though this information is not predictive enough to determine pathogenicity. One additional pathogenic variant, resulting in a different amino acid change at the same position, p.Arg170Cys, has been reported in association with disease in the literature and ClinVar, supporting that a change at this position may not be tolerated (PMID: 29602947, 23430543, 27008851, 17427031, 20946052, 27922757, 22623374, 20880730; VariationID: 93453). The presence of this variant in 2 affected homozygotes increases the likelihood that the p.Arg170Leu variant is pathogenic (PMID: 10685993). The phenotype of an individual homozygous for this variant is highly specific for Gaucher disease based on extremely low residual enzyme activity, consistent with disease (PMID: 10685993). In summary, although additional studies are required to fully establish its clinical significance, this variant is likely pathogenic. ACMG/AMP Criteria applied: PM2, PM5, PM3, PP3, PP4 (Richards 2015). -

Gaucher disease perinatal lethal

Pathogenic:1

Mar 01, 2000

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.50

BayesDel_addAF

Pathogenic

0.44

BayesDel_noAF

Pathogenic

0.47

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.98

D;D;.;.

Eigen

Uncertain

0.32

Eigen_PC

Benign

0.19

FATHMM_MKL

Uncertain

0.88

LIST_S2

Uncertain

0.95

.;D;D;D

M_CAP

Pathogenic

0.77

MetaRNN

Pathogenic

0.99

D;D;D;D

MetaSVM

Pathogenic

1.1

MutationAssessor

Uncertain

2.9

M;M;.;.

PhyloP100

2.1

PrimateAI

Benign

0.38

PROVEAN

Pathogenic

-5.5

D;D;D;D

REVEL

Pathogenic

0.88

Sift

Uncertain

0.0090

D;D;D;D

Sift4G

Uncertain

0.017

D;D;D;D

Polyphen

0.99

D;D;.;.

Vest4

0.89

MutPred

0.86

Loss of catalytic residue at R170 (P = 0.0088);Loss of catalytic residue at R170 (P = 0.0088);.;.;

MVP

0.92

MPC

1.6

ClinPred

0.98

GERP RS

3.5

Varity_R

0.93

gMVP

0.93

Mutation Taster

=0/100

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over