NM_000157.4:c.1208G>C

Variant names:

• chr1-155236261-C-G
• rs121908307
• NM_000157.4:c.1208G>C

Variant summary

Our verdict is Pathogenic. The variant received 17 ACMG points: 17P and 0B. PM1 PM2 PP2 PP3_Strong PP5_Very_Strong

The NM_000157.4(GBA1):​c.1208G>C​(p.Ser403Thr) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,618 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. S403G) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: GBA1 NM_000157.4 missense
• Clinical Significance: Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 5.32
• Publications: 5 publications found

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

ACMG classification

Our verdict: Pathogenic. The variant received 17 ACMG points.

• PM1: In a hotspot region, there are 10 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 5 uncertain in NM_000157.4
• PM2: Very rare variant in population databases, with high coverage
• 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, 0.95
• PP5: Variant 1-155236261-C-G is Pathogenic according to our data. Variant chr1-155236261-C-G is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 4320.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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GBA1	NM_000157.4	MANE Select	c.1208G>C	p.Ser403Thr	missense	Exon 8 of 11	NP_000148.2
	GBA1	NM_001005741.3		c.1208G>C	p.Ser403Thr	missense	Exon 9 of 12	NP_001005741.1
	GBA1	NM_001005742.3		c.1208G>C	p.Ser403Thr	missense	Exon 9 of 12	NP_001005742.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GBA1	ENST00000368373.8	TSL:1 MANE Select	c.1208G>C	p.Ser403Thr	missense	Exon 8 of 11	ENSP00000357357.3
	GBA1	ENST00000327247.9	TSL:1	c.1208G>C	p.Ser403Thr	missense	Exon 9 of 12	ENSP00000314508.5
	GBA1	ENST00000427500.7	TSL:2	c.1061G>C	p.Ser354Thr	missense	Exon 7 of 10	ENSP00000402577.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251292 AF XY: 0.00

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461618 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 727154

African (AFR) AF: 0.00 AC: 0 AN: 33476

American (AMR) AF: 0.00 AC: 0 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39696

South Asian (SAS) AF: 0.00 AC: 0 AN: 86248

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111786

Other (OTH) AF: 0.00 AC: 0 AN: 60378

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Gaucher disease type I Pathogenic:2

Jan 22, 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.Ser403Thr variant in GBA has been reported in 4 individuals with Gaucher disease (PMID: 1899336, 26756743, 18586596) and has been identified in 0.001% (1/113654) of European (non-Finnish) chromosomes by the by the Genome Aggregation Database (gnomAD, http://gnomad.broadinstitute.org; dbSNP rs121908307). Although this variant has been seen in the general population, its frequency is low enough to be consistent with a recessive carrier frequency. Computational prediction tools and conservation analyses do not provide strong support for or against an impact to the protein. A likely pathogenic variant, resulting in a different amino acid change at the same position, p.Ser403Arg, has been reported in association with disease in the literature, slightly supporting that a change at this position may not be tolerated (PMID: 16039881, 14757438, 11783951, 21384230, 22429443). Additionally, the presence of this variant in combination with a reported pathogenic variant and in 4 individuals with Gaucher disease increases the likelihood that the p.Ser403Thr variant is pathogenic (VariationID: 4288, PMID: 1899336, 26756743, 18586596). In summary, although additional studies are required to fully establish its clinical significance, this variant is likely pathogenic. ACMG/AMP Criteria applied: PM3_strong, PM2, PM5_supporting (Richards 2015).

Jul 01, 1990

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

not provided Pathogenic:1

Mar 02, 2022

GeneDx

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Published functional studies demonstrate a damaging effect with reduced enzyme activity compared to wildtype (Grace et al., 1994; Liou et al., 2006); In silico analysis supports that this missense variant does not alter protein structure/function; Also known as S364T; This variant is associated with the following publications: (PMID: 16293621, 8294487, 21228398, 26756743, 18586596, 1899336)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.41
BayesDel_addAF	Pathogenic	0.32	D
BayesDel_noAF	Pathogenic	0.22
CADD	Uncertain	24
DANN	Benign	0.97
DEOGEN2	Pathogenic	0.88	D
Eigen	Benign	-0.054
Eigen_PC	Benign	0.052
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Benign	0.71	T
M_CAP	Pathogenic	0.63	D
MetaRNN	Pathogenic	0.95	D
MetaSVM	Uncertain	0.78	D
MutationAssessor	Benign	1.6	L
PhyloP100		5.3
PrimateAI	Uncertain	0.59	T
PROVEAN	Benign	-1.4	N
REVEL	Pathogenic	0.66
Sift	Benign	0.12	T
Sift4G	Benign	0.27	T
Polyphen		0.43	B
Vest4		0.81
MutPred		0.70		Loss of disorder (P = 0.0742)
MVP		0.89
MPC		0.79
ClinPred		0.54	D
GERP RS		3.6
Varity_R		0.55
gMVP		0.98
Mutation Taster		=2/98	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs121908307; hg19: chr1-155206052;