rs1553684545

Variant names:

• chr3-81594018-T-A
• rs1553684545
• NM_000158.4:c.998A>T

Your query was ambiguous. Multiple possible variants found:

• chr3-81594018-T-A
• chr3-81594018-T-C

Variant summary

Our verdict is Pathogenic. The variant received 14 ACMG points: 14P and 0B. PM1 PM2 PP3_Moderate PP5_Very_Strong

The NM_000158.4(GBE1):​c.998A>T​(p.Glu333Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. E333G) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: GBE1 NM_000158.4 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:5
• Conservation: PhyloP100: 7.63
• Publications: 0 publications found

Genes affected

GBE1 (HGNC:4180): (1,4-alpha-glucan branching enzyme 1) The protein encoded by this gene is a glycogen branching enzyme that catalyzes the transfer of alpha-1,4-linked glucosyl units from the outer end of a glycogen chain to an alpha-1,6 position on the same or a neighboring glycogen chain. Branching of the chains is essential to increase the solubility of the glycogen molecule and, consequently, in reducing the osmotic pressure within cells. Highest level of this enzyme are found in liver and muscle. Mutations in this gene are associated with glycogen storage disease IV (also known as Andersen's disease). [provided by RefSeq, Jul 2008]

GBE1 Gene-Disease associations (from GenCC):

• glycogen storage disease due to glycogen branching enzyme deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Laboratory for Molecular Medicine, G2P, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), ClinGen
• adult polyglucosan body disease

  Inheritance: AR Classification: MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 14 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 3 uncertain in NM_000158.4
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.929
• PP5: Variant 3-81594018-T-A is Pathogenic according to our data. Variant chr3-81594018-T-A is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 520679.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000158.4. 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
	GBE1	NM_000158.4	MANE Select	c.998A>T	p.Glu333Val	missense	Exon 8 of 16	NP_000149.4	Q04446

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GBE1	ENST00000429644.7	TSL:1 MANE Select	c.998A>T	p.Glu333Val	missense	Exon 8 of 16	ENSP00000410833.2	Q04446
	GBE1	ENST00000895874.1		c.998A>T	p.Glu333Val	missense	Exon 8 of 16	ENSP00000565933.1
	GBE1	ENST00000942742.1		c.992A>T	p.Glu331Val	missense	Exon 8 of 16	ENSP00000612801.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 18

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
4	-	-	Glycogen storage disease, type IV (4)
1	-	-	Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.93
BayesDel_addAF	Pathogenic	0.48	D
BayesDel_noAF	Pathogenic	0.45
CADD	Pathogenic	29
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.73	D
Eigen	Pathogenic	0.82
Eigen_PC	Pathogenic	0.75
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Pathogenic	1.0	D
M_CAP	Uncertain	0.25	D
MetaRNN	Pathogenic	0.93	D
MetaSVM	Pathogenic	0.86	D
MutationAssessor	Pathogenic	3.8	H
PhyloP100		7.6
PrimateAI	Uncertain	0.58	T
PROVEAN	Pathogenic	-6.7	D
REVEL	Pathogenic	0.90
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.94
MutPred		0.67		Gain of MoRF binding (P = 0.0226)
MVP		0.96
MPC		0.21
ClinPred		1.0	D
GERP RS		5.7
Varity_R		0.88
gMVP		0.87
Mutation Taster		=1/99	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs1553684545; hg19: chr3-81643169;