dbSNP rs79653797: GBA1:p.Arg159Gln (chr1-155238629-C-T) – ACMG Classification: Pathogenic (21 pts)

Variant summary

Our verdict is Pathogenic. The variant received 21 ACMG points: 21P and 0B. PS3PM1PM5PP2PP3_StrongPP5_Very_Strong

The NM_000157.4(GBA1):c.476G>A(p.Arg159Gln) variant causes a missense change. The variant allele was found at a frequency of 0.00000806 in 1,613,418 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 (★★). ClinVar reports functional evidence for this variant: "SCV001423035: "In vitro functional studies showing that fibroblasts cultured from a patient with Gaucher disease had <1% wild-type activity provide some evidence that the p.Arg159Gln variant may impact protein function (PMID:15214004)."" and additional evidence is available in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R159W) has been classified as Pathogenic.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 29)

Exomes 𝑓: 0.0000082 ( 0 hom. )

Consequence

GBA1
NM_000157.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:8O:1

Conservation

PhyloP100: 6.76

Publications

21 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: Genomics England PanelApp, Laboratory for Molecular Medicine, G2P
late-onset Parkinson disease
Inheritance: AD Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Genomics England PanelApp
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: Genomics England PanelApp, Orphanet
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 21 ACMG points.

PS3

PS3 evidence extracted from ClinVar submissions: SCV001423035: "In vitro functional studies showing that fibroblasts cultured from a patient with Gaucher disease had <1% wild-type activity provide some evidence that the p.Arg159Gln variant may impact protein function (PMID: 15214004)."; SCV001737811: The most pronounced variant effect results in <1% of normal activity in the patient derived fibroblast homogenate (Felderhoff-Mueser_2004).; SCV005440760: Functional studies found this variant is associated with significantly reduced enzyme activity compared to wild-type (PMID: 16293621);

PM1

In a hotspot region, there are 8 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_000157.4

PM5

Other missense variant is known to change same aminoacid residue: Variant chr1-155238630-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 65570.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

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 type I, Gaucher disease type III, Gaucher disease type II, Gaucher disease-ophthalmoplegia-cardiovascular calcification syndrome, Gaucher disease perinatal lethal, Gaucher disease, Parkinson disease.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.991

PP5

Variant 1-155238629-C-T is Pathogenic according to our data. Variant chr1-155238629-C-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 4291.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000157.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GBA1	NM_000157.4	MANE Select	c.476G>A	p.Arg159Gln	missense	Exon 5 of 11	NP_000148.2	P04062-1
GBA1	NM_001005741.3		c.476G>A	p.Arg159Gln	missense	Exon 6 of 12	NP_001005741.1	P04062-1
GBA1	NM_001005742.3		c.476G>A	p.Arg159Gln	missense	Exon 6 of 12	NP_001005742.1	P04062-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GBA1	ENST00000368373.8	TSL:1 MANE Select	c.476G>A	p.Arg159Gln	missense	Exon 5 of 11	ENSP00000357357.3	P04062-1
GBA1	ENST00000327247.9	TSL:1	c.476G>A	p.Arg159Gln	missense	Exon 6 of 12	ENSP00000314508.5	P04062-1
GBA1	ENST00000948997.1		c.542G>A	p.Arg181Gln	missense	Exon 7 of 13	ENSP00000619056.1

Frequencies

GnomAD3 genomes

AF:

0.00000659

AC:

AN:

151758

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000243

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000796

AC:

AN:

251180

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:

0.00000881

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000821

AC:

AN:

1461660

Hom.:

Cov.:

AF XY:

0.00000963

AC XY:

AN XY:

727142

show subpopulations

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:

39698

South Asian (SAS)

AF:

0.00

AC:

AN:

86248

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.00000989

AC:

AN:

1111838

Other (OTH)

AF:

0.00

AC:

AN:

60376

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.442

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00000659

AC:

AN:

151758

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74080

show subpopulations

African (AFR)

AF:

0.0000243

AC:

AN:

41192

American (AMR)

AF:

0.00

AC:

AN:

15220

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5166

South Asian (SAS)

AF:

0.00

AC:

AN:

4812

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10578

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68010

Other (OTH)

AF:

0.00

AC:

AN:

2082

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.825

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000182

Hom.:

ClinVar

ClinVar submissions

Significance:Pathogenic/Likely pathogenic

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Gaucher disease (4)

not provided (2)

Gaucher disease perinatal lethal (1)

Gaucher disease type I (1)

Gaucher disease type II;C0268251:Gaucher disease type III;C1856476:Gaucher disease-ophthalmoplegia-cardiovascular calcification syndrome;C1961835:Gaucher disease type I (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.87

BayesDel_addAF

Pathogenic

0.50

BayesDel_noAF

Pathogenic

0.57

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.99

Eigen

Uncertain

0.67

Eigen_PC

Uncertain

0.51

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.98

M_CAP

Pathogenic

0.79

MetaRNN

Pathogenic

0.99

MetaSVM

Pathogenic

0.96

MutationAssessor

Pathogenic

4.0

PhyloP100

6.8

PrimateAI

Benign

0.48

PROVEAN

Uncertain

-3.6

REVEL

Pathogenic

0.96

Sift

Pathogenic

0.0

Sift4G

Uncertain

0.0080

Polyphen

1.0

Vest4

0.98

MutPred

0.90

Loss of methylation at R159 (P = 0.0371)

MVP

0.96

MPC

2.0

ClinPred

1.0

GERP RS

3.5

Varity_R

0.99

gMVP

0.98

Mutation Taster

=0/100

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over