rs200294882

Positions:

chr17-80108788-A-G

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BA1

This summary comes from the ClinGen Evidence Repository: The highest continental population minor allele frequency for c.1286A>G (p.Gln429Arg) in gnomAD v2.1.1 is 0.01028 in the East Asian population. This is higher than the ClinGen LSD VCEP’s BA1 threshold (>0.01), therefore meeting the BA1 criterion. There is a ClinVar entry for this variant (Variation ID: 284497; 2 star review status) with three submitters classifying the variant as benign and one as likely benign. In summary, this variant meets the criteria to be classified as benign for Pompe disease. GAA-specific ACMG/AMP criteria applied, as specified by the ClinGen LSD VCEP: BA1. LINK:https://erepo.genome.network/evrepo/ui/classification/CA8815250/MONDO:0009290/010

Frequency

Genomes: 𝑓 0.00039 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00024 ( 1 hom. )

Consequence

GAA
NM_000152.5 missense

Scores

Clinical Significance

Benign reviewed by expert panel U:1B:8

Conservation

PhyloP100: -0.443

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BA1

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GAA	NM_000152.5 linkuse as main transcript	c.1286A>G	p.Gln429Arg	missense_variant	8/20	ENST00000302262.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GAA	ENST00000302262.8 linkuse as main transcript	c.1286A>G	p.Gln429Arg	missense_variant	8/20	1	NM_000152.5	P1

Frequencies

GnomAD3 genomes

AF:

0.000388

AC:

AN:

152190

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.0101

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000798

AC:

187

AN:

234302

Hom.:

AF XY:

0.000705

AC XY:

AN XY:

127700

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0105

Gnomad SAS exome

AF:

0.0000341

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000960

Gnomad OTH exome

AF:

0.000172

GnomAD4 exome

AF:

0.000238

AC:

347

AN:

1455418

Hom.:

Cov.:

AF XY:

0.000232

AC XY:

168

AN XY:

723648

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000227

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00781

Gnomad4 SAS exome

AF:

0.0000234

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000721

Gnomad4 OTH exome

AF:

0.000466

GnomAD4 genome

AF:

0.000387

AC:

AN:

152308

Hom.:

Cov.:

AF XY:

0.000443

AC XY:

AN XY:

74466

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.0101

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000513

Hom.:

Bravo

AF:

0.000348

ExAC

AF:

0.000728

AC:

Asia WGS

AF:

0.00173

AC:

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Uncertain:1Benign:8

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Glycogen storage disease, type II

Uncertain:1Benign:3

Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	May 05, 2017	This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. However, the evidence from the literature, in combination with allele frequency data from public databases where available, was not sufficient to rule this variant in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -
Benign, reviewed by expert panel	curation	ClinGen Lysosomal Storage Disorder Variant Curation Expert Panel	Jan 22, 2020	The highest continental population minor allele frequency for c.1286A>G (p.Gln429Arg) in gnomAD v2.1.1 is 0.01028 in the East Asian population. This is higher than the ClinGen LSD VCEP's BA1 threshold (>0.01), therefore meeting the BA1 criterion. There is a ClinVar entry for this variant (Variation ID: 284497; 2 star review status) with three submitters classifying the variant as benign and one as likely benign. In summary, this variant meets the criteria to be classified as benign for Pompe disease. GAA-specific ACMG/AMP criteria applied, as specified by the ClinGen LSD VCEP: BA1. -
Benign, criteria provided, single submitter	curation	Broad Center for Mendelian Genomics, Broad Institute of MIT and Harvard	Jan 22, 2020	The p.Gln429Arg variant in GAA has been reported in one Taiwanese individual with glycogen storage disease II (PMID: 25466677). This variant has also been reported in ClinVar as benign by EGL Genetic Diagnostics and Invitae, and as likely benign by GeneDx (VariantID: 284497). This variant has been identified in 1.03% (196/19070) of East Asian chromosomes, 0.03% (1/29316) of South Asian chromosomes, and 0.002% (2/119604) of European (non-Finnish) chromosomes by the Genome Aggregation Database (gnomAD, http://gnomad.broadinstitute.org; dbSNP rs200294882). This variant has been seen in the general population at a frequency high enough to rule out a pathogenic role. Computational prediction tools, including splice predictors, and conservation analyses suggest that this variant may not impact the protein, though this information is not predictive enough to rule out pathogenicity. This variant was found in cis with another pathogenic variant, suggesting that it may not cause disease (PMID: 25466677; Variation ID: 423925). In summary, this variant meets criteria to be classified as benign for glycogen storage disease II in an autosomal recessive manner based on its high frequency in the general population and the presence of the same amino acid in other mammals. ACMG/AMP Criteria applied: BA1, BP2, BP4 (Richards 2015). -
Benign, criteria provided, single submitter	clinical testing	Invitae	Jan 31, 2024	- -

not specified

Benign:2

Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Nov 12, 2015	- -
Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Aug 09, 2019	Variant summary: GAA c.1286A>G (p.Gln429Arg) results in a conservative amino acid change in the encoded protein sequence. Five of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.0008 in 234302 control chromosomes, predominantly at a frequency of 0.011 within the East Asian subpopulation in the gnomAD database, including 1 homozygote. The observed variant frequency within East Asian control individuals in the gnomAD database is approximately 2.6 fold of the estimated maximal expected allele frequency for a pathogenic variant in GAA causing Glycogen Storage Disease, Type 2 (Pompe Disease) phenotype (0.0042). In addition, the variant was also found in Japanese healthy controls with a frequency of 0.005, including 1 homozygote (in the HGVD database). These data strongly suggest that the variant is a benign polymorphism found primarily in populations of East Asian origin. The variant, c.1286A>G, has been reported in the literature in a newborn affected with infantile-onset Glycogen Storage Disease, Type 2 (Pompe Disease), however, this patient also carried two other pathogenic GAA variants, in cis (c.1062 C>G (p.Tyr354X)), and trans (c.1935C>A (p.Asp645Glu)) that could explain the phenotype, therefore supporting a benign role for the variant of interest (Chien_2014, Peng_2016). To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Three ClinVar submissions from other clinical diagnostic laboratories (evaluation after 2014) classified the variant as likely benign (1x) and benign (2x). Based on the evidence outlined above, the variant was classified as benign. -

Cardiomyopathy

Benign:1

Benign, criteria provided, single submitter

clinical testing

Center for Advanced Laboratory Medicine, UC San Diego Health, University of California San Diego

Mar 14, 2017

- -

not provided

Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Oct 15, 2020

This variant is associated with the following publications: (PMID: 27183828, 25466677) -

Cardiovascular phenotype

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 23, 2020

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.056

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.27

CADD

Benign

0.0060

DANN

Benign

0.19

DEOGEN2

Uncertain

0.52

D;D

Eigen

Benign

-1.9

Eigen_PC

Benign

-1.9

FATHMM_MKL

Benign

0.088

MetaRNN

Benign

0.0081

T;T

MetaSVM

Benign

-0.68

MutationAssessor

Benign

-0.025

N;N

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.22

PROVEAN

Benign

-0.39

N;N

REVEL

Uncertain

0.33

Sift

Benign

0.61

T;T

Sift4G

Benign

0.57

T;T

Polyphen

0.0

B;B

Vest4

0.17

MVP

0.74

MPC

0.12

ClinPred

0.0042

GERP RS

-5.3

Varity_R

0.13

gMVP

0.51

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.28

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.28

Position offset: -5

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