chr1-155236550-T-A

Variant names:

• chr1-155236550-T-A
• rs9628662
• NM_000157.4:c.1000-81A>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_000157.4(GBA1):​c.1000-81A>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: GBA1 NM_000157.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.292
• Publications: 34 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: 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

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.91).

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GBA1	NM_000157.4	MANE Select	c.1000-81A>T		intron	N/A	NP_000148.2	P04062-1
	GBA1	NM_001005741.3		c.1000-81A>T		intron	N/A	NP_001005741.1	P04062-1
	GBA1	NM_001005742.3		c.1000-81A>T		intron	N/A	NP_001005742.1	P04062-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GBA1	ENST00000368373.8	TSL:1 MANE Select	c.1000-81A>T		intron	N/A	ENSP00000357357.3	P04062-1
	GBA1	ENST00000327247.9	TSL:1	c.1000-81A>T		intron	N/A	ENSP00000314508.5	P04062-1
	GBA1	ENST00000948997.1		c.1066-81A>T		intron	N/A	ENSP00000619056.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 992558 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 509494

African (AFR) AF: 0.00 AC: 0 AN: 23928

American (AMR) AF: 0.00 AC: 0 AN: 37176

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 22732

East Asian (EAS) AF: 0.00 AC: 0 AN: 35836

South Asian (SAS) AF: 0.00 AC: 0 AN: 73194

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50308

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4948

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 699412

Other (OTH) AF: 0.00 AC: 0 AN: 45024

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	0.74
DANN	Benign	0.48
PhyloP100		-0.29

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.11		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: rs9628662; hg19: chr1-155206341;