17-80104717-G-T

Position:

chr17-80104717-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 1P and 1B. PM2_SupportingBP4

This summary comes from the ClinGen Evidence Repository: The NM_000152.5:c.131G>T variant in GAA is predicted to result in the substitution of glycine by valine at amino acid 44 (p.Gly44Val). The highest population minor allele frequency in gnomAD v2.1.1 is 0.00025 (32/126504 alleles) in the European non-Finnish population, which is lower than the ClinGen LSD VCEP’s threshold for PM2_Supporting (<0.001), meeting this criterion (PM2_Supporting). The computational predictor REVEL gives a score of 0.245 which is below the threshold of 0.5, evidence that does not predict a damaging effect on GAA function. No impact on splicing is predicted by SpliceAI (BP4). To our knowledge, this variant has not been reported in the literature in individuals with Pompe disease, and the results of functional studies are not available. There is a ClinVar entry for this variant (Variation ID: 325774). In summary, this variant meets the criteria to be classified as a variant of uncertain significance for Pompe disease. GAA-specific ACMG/AMP criteria applied, as specified by the ClinGen LSD VCEP: PM2_Supporting, BP4.(Classification approved by the ClinGen Lysosomal Diseases VCEP on June 20, 2023). LINK:https://erepo.genome.network/evrepo/ui/classification/CA8814793/MONDO:0009290/010

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00021 ( 0 hom. )

Consequence

GAA
NM_000152.5 missense

Scores

Clinical Significance

Uncertain significance reviewed by expert panel U:8B:1

Conservation

PhyloP100: -0.0340

Variant links:

Genes affected

GAA (HGNC:4065): (alpha glucosidase) This gene encodes lysosomal alpha-glucosidase, which is essential for the degradation of glycogen to glucose in lysosomes. The encoded preproprotein is proteolytically processed to generate multiple intermediate forms and the mature form of the enzyme. Defects in this gene are the cause of glycogen storage disease II, also known as Pompe's disease, which is an autosomal recessive disorder with a broad clinical spectrum. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2016]

GAA links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

For more information check the summary or visit ClinGen Evidence Repository.

BP4

For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GAA	NM_000152.5 linkuse as main transcript	c.131G>T	p.Gly44Val	missense_variant	2/20	ENST00000302262.8	NP_000143.2	P10253

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GAA	ENST00000302262.8 linkuse as main transcript	c.131G>T	p.Gly44Val	missense_variant	2/20	1	NM_000152.5	ENSP00000305692.3		P10253

Frequencies

GnomAD3 genomes

AF:

0.000164

AC:

AN:

152118

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000966

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000309

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000122

AC:

AN:

246842

Hom.:

AF XY:

0.000164

AC XY:

AN XY:

134300

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000261

Gnomad OTH exome

AF:

0.000167

GnomAD4 exome

AF:

0.000205

AC:

300

AN:

1460276

Hom.:

Cov.:

AF XY:

0.000209

AC XY:

152

AN XY:

726412

show subpopulations

Gnomad4 AFR exome

AF:

0.0000598

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:

0.000256

Gnomad4 OTH exome

AF:

0.000215

GnomAD4 genome

AF:

0.000164

AC:

AN:

152118

Hom.:

Cov.:

AF XY:

0.000188

AC XY:

AN XY:

74296

show subpopulations

Gnomad4 AFR

AF:

0.0000966

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000309

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000196

Hom.:

Bravo

AF:

0.000125

ExAC

AF:

0.0000825

AC:

EpiCase

AF:

0.000218

EpiControl

AF:

0.0000594

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:8Benign:1

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Glycogen storage disease, type II

Uncertain:4Benign:1

Uncertain significance, reviewed by expert panel	curation	ClinGen Lysosomal Storage Disorder Variant Curation Expert Panel	Jun 20, 2023	The NM_000152.5:c.131G>T variant in GAA is predicted to result in the substitution of glycine by valine at amino acid 44 (p.Gly44Val). The highest population minor allele frequency in gnomAD v2.1.1 is 0.00025 (32/126504 alleles) in the European non-Finnish population, which is lower than the ClinGen LSD VCEP’s threshold for PM2_Supporting (<0.001), meeting this criterion (PM2_Supporting). The computational predictor REVEL gives a score of 0.245 which is below the threshold of 0.5, evidence that does not predict a damaging effect on GAA function. No impact on splicing is predicted by SpliceAI (BP4). To our knowledge, this variant has not been reported in the literature in individuals with Pompe disease, and the results of functional studies are not available. There is a ClinVar entry for this variant (Variation ID: 325774). In summary, this variant meets the criteria to be classified as a variant of uncertain significance for Pompe disease. GAA-specific ACMG/AMP criteria applied, as specified by the ClinGen LSD VCEP: PM2_Supporting, BP4. (Classification approved by the ClinGen Lysosomal Diseases VCEP on June 20, 2023). -
Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jun 14, 2016	- -
Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 17, 2024	- -
Uncertain significance, no assertion criteria provided	clinical testing	Natera, Inc.	Jan 24, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Nov 01, 2021	- -

not provided

Uncertain:4

Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Sep 22, 2021	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jun 11, 2024	Has not been previously published as pathogenic or benign to our knowledge; In silico analysis indicates that this missense variant does not alter protein structure/function -
Uncertain significance, no assertion criteria provided	provider interpretation	Stanford Center for Inherited Cardiovascular Disease, Stanford University	Sep 07, 2017	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Mar 28, 2023	BP4, PM2 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.072

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.30

CADD

Benign

4.9

DANN

Benign

0.67

DEOGEN2

Benign

0.0071

T;.;T;T

Eigen

Benign

-1.0

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.12

LIST_S2

Benign

0.46

T;T;.;T

M_CAP

Benign

0.043

MetaRNN

Benign

0.079

T;T;T;T

MetaSVM

Benign

-0.68

MutationAssessor

Benign

0.69

.;.;N;N

PrimateAI

Benign

0.27

PROVEAN

Benign

0.22

.;.;N;N

REVEL

Benign

0.24

Sift

Benign

0.18

.;.;T;T

Sift4G

Benign

0.27

T;T;T;T

Polyphen

0.0030

.;.;B;B

Vest4

0.17

MutPred

0.34

Loss of glycosylation at S43 (P = 0.036);Loss of glycosylation at S43 (P = 0.036);Loss of glycosylation at S43 (P = 0.036);Loss of glycosylation at S43 (P = 0.036);

MVP

0.82

MPC

0.19

ClinPred

0.020

GERP RS

1.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.065

gMVP

0.49

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over