1-155239716-C-G

Position:

• chr1-155239716-C-G

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM2 PP3_Moderate PP5_Very_Strong

The NM_000157.4(GBA1):​c.354G>C​(p.Lys118Asn) 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 1,461,892 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 (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: GBA1 NM_000157.4 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:5
• Conservation: PhyloP100: 0.629

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]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.891
• PP5: Variant 1-155239716-C-G is Pathogenic according to our data. Variant chr1-155239716-C-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 4330.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GBA1	NM_000157.4	c.354G>C	p.Lys118Asn	missense_variant	4/11	ENST00000368373.8	NP_000148.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GBA1	ENST00000368373.8	c.354G>C	p.Lys118Asn	missense_variant	4/11	1	NM_000157.4	ENSP00000357357	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461892 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 727246

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jan 29, 2013	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Jul 06, 2019	- -

Gaucher disease type I Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Jan 01, 2003

- -

Gaucher disease Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Jul 20, 2022

Variant summary: GBA c.354G>C (p.Lys118Asn) results in a non-conservative amino acid change located in the Glycosyl hydrolase family 30, TIM-barrel domain of the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant was absent in 251482 control chromosomes. c.354G>C has been reported in the literature in individuals affected with Gaucher Disease (Beutler_1996, Koprivica_2000, Zhao_2003). These data indicate that the variant is likely to be associated with disease. At least one publication reports experimental evidence evaluating an impact on protein function. The most pronounced variant effect results in <10% of normal activity (LIou_2006). One clinical diagnostic laboratory has submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation and classified the variant as likely pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic. -

Gaucher disease type III Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Jan 01, 2003

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.81
BayesDel_addAF	Uncertain	0.13	D
BayesDel_noAF	Uncertain	-0.050
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.88	D;D;.
Eigen	Benign	-0.015
Eigen_PC	Benign	-0.17
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Uncertain	0.94	.;D;D
M_CAP	Pathogenic	0.69	D
MetaRNN	Pathogenic	0.89	D;D;D
MetaSVM	Pathogenic	0.92	D
MutationAssessor	Uncertain	2.6	M;M;.
MutationTaster	Benign	0.94	A;A;A;A;A
PrimateAI	Uncertain	0.63	T
PROVEAN	Benign	-1.5	N;N;N
REVEL	Uncertain	0.54
Sift	Benign	0.036	D;D;D
Sift4G	Benign	0.17	T;T;T
Polyphen		1.0	D;D;.
Vest4		0.81
MutPred		0.49		Loss of methylation at K118 (P = 0.0169);Loss of methylation at K118 (P = 0.0169);.;
MVP		0.95
MPC		1.4
ClinPred		0.86	D
GERP RS		-1.7
Varity_R		0.70
gMVP		0.80

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

Publications

LitVar

Other links and lift over

dbSNP: rs121908312; hg19: chr1-155209507;