1-155235256-C-A

Variant names:

• chr1-155235256-C-A
• rs75671029
• NM_000157.4:c.1444G>T

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM1 PM2 PP2

The NM_000157.4(GBA1):​c.1444G>T​(p.Asp482Tyr) 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 1,461,662 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D482N) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 26)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: GBA1 NM_000157.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.184
• Publications: 0 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: Uncertain_significance. The variant received 5 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 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.

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.1444G>T	p.Asp482Tyr	missense	Exon 10 of 11	NP_000148.2
	GBA1	NM_001005741.3		c.1444G>T	p.Asp482Tyr	missense	Exon 11 of 12	NP_001005741.1
	GBA1	NM_001005742.3		c.1444G>T	p.Asp482Tyr	missense	Exon 11 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.1444G>T	p.Asp482Tyr	missense	Exon 10 of 11	ENSP00000357357.3
	GBA1	ENST00000327247.9	TSL:1	c.1444G>T	p.Asp482Tyr	missense	Exon 11 of 12	ENSP00000314508.5
	GBA1	ENST00000427500.7	TSL:2	c.1297G>T	p.Asp433Tyr	missense	Exon 9 of 10	ENSP00000402577.2

Frequencies

GnomAD3 genomes Cov.: 26

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461662 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727140

African (AFR) AF: 0.00 AC: 0 AN: 33472

American (AMR) AF: 0.00 AC: 0 AN: 44710

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86250

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5762

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111838

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

GnomAD4 genome Cov.: 26

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Pathogenic	0.18	D
BayesDel_noAF	Uncertain	0.020
CADD	Benign	12
DANN	Uncertain	0.97
DEOGEN2	Pathogenic	0.89	D
Eigen	Benign	-0.76
Eigen_PC	Benign	-0.99
FATHMM_MKL	Benign	0.036	N
LIST_S2	Benign	0.84	T
M_CAP	Pathogenic	0.54	D
MetaRNN	Uncertain	0.66	D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Uncertain	2.2	M
PhyloP100		-0.18
PrimateAI	Benign	0.43	T
PROVEAN	Uncertain	-3.1	D
REVEL	Uncertain	0.56
Sift	Uncertain	0.029	D
Sift4G	Uncertain	0.016	D
Polyphen		0.53	P
Vest4		0.44
MutPred		0.52		Gain of phosphorylation at D482 (P = 0.0287)
MVP		0.81
MPC		1.2
ClinPred		0.44	T
GERP RS		-1.2
Varity_R		0.23
gMVP		0.85
Mutation Taster		=79/21	polymorphism

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: rs75671029; hg19: chr1-155205047;