1-155240033-C-G

Variant names:

• chr1-155240033-C-G
• NM_000157.4:c.160G>C
• GBA1 p.Val54Leu

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001171811.2(GBA1):​c.-102G>C variant causes a 5 prime UTR premature start codon gain change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 31)
• Consequence: GBA1 NM_001171811.2 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.45
• 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: Laboratory for Molecular Medicine, G2P, Genomics England PanelApp
• late-onset Parkinson disease

  Inheritance: AD Classification: STRONG, LIMITED Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• 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: Orphanet, Genomics England PanelApp
• 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 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.917

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001171811.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GBA1	NM_000157.4	MANE Select	c.160G>C	p.Val54Leu	missense	Exon 3 of 11	NP_000148.2	P04062-1
	GBA1	NM_001171811.2		c.-102G>C		5_prime_UTR_premature_start_codon_gain	Exon 2 of 10	NP_001165282.1	P04062-4
	GBA1	NM_001005741.3		c.160G>C	p.Val54Leu	missense	Exon 4 of 12	NP_001005741.1	P04062-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GBA1	ENST00000368373.8	TSL:1 MANE Select	c.160G>C	p.Val54Leu	missense	Exon 3 of 11	ENSP00000357357.3	P04062-1
	GBA1	ENST00000327247.9	TSL:1	c.160G>C	p.Val54Leu	missense	Exon 4 of 12	ENSP00000314508.5	P04062-1
	GBA1	ENST00000428024.3	TSL:2	c.-102G>C		5_prime_UTR_premature_start_codon_gain	Exon 2 of 10	ENSP00000397986.2	P04062-4

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.84
BayesDel_addAF	Pathogenic	0.37	D
BayesDel_noAF	Pathogenic	0.30
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.86	D
Eigen	Uncertain	0.58
Eigen_PC	Uncertain	0.44
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Pathogenic	0.86	D
MetaRNN	Pathogenic	0.92	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	3.2	M
PhyloP100		6.4
PrimateAI	Uncertain	0.76	T
PROVEAN	Uncertain	-2.6	D
REVEL	Pathogenic	0.86
Sift	Uncertain	0.0080	D
Sift4G	Uncertain	0.014	D
Varity_R		0.73
gMVP		0.84
Mutation Taster		=1/99	disease causing

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr1-155209824;