NM_000642.3:c.1481G>A

Variant names:

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_000642.3(AGL):c.1481G>A(p.Arg494His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00828 in 1,613,946 control chromosomes in the GnomAD database, including 95 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R494C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0072 ( 11 hom., cov: 32)

Exomes 𝑓: 0.0084 ( 84 hom. )

Consequence

AGL
NM_000642.3 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:13

Conservation

PhyloP100: 7.71

Variant links:

Genes affected

AGL (HGNC:321): (amylo-alpha-1, 6-glucosidase, 4-alpha-glucanotransferase) This gene encodes the glycogen debrancher enzyme which is involved in glycogen degradation. This enzyme has two independent catalytic activities which occur at different sites on the protein: a 4-alpha-glucotransferase activity and a amylo-1,6-glucosidase activity. Mutations in this gene are associated with glycogen storage disease although a wide range of enzymatic and clinical variability occurs which may be due to tissue-specific alternative splicing. Alternatively spliced transcripts encoding different isoforms have been described. [provided by RefSeq, Jul 2008]

AGL links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.01898399).

BP6

Variant 1-99877698-G-A is Benign according to our data. Variant chr1-99877698-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 256723.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-99877698-G-A is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00719 (1094/152200) while in subpopulation NFE AF= 0.00907 (617/68004). AF 95% confidence interval is 0.00848. There are 11 homozygotes in gnomad4. There are 601 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 11 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AGL	NM_000642.3 link	c.1481G>A	p.Arg494His	missense_variant	Exon 12 of 34	ENST00000361915.8	NP_000633.2	P35573-1A0A0S2A4E4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AGL	ENST00000361915.8 link	c.1481G>A	p.Arg494His	missense_variant	Exon 12 of 34	1	NM_000642.3	ENSP00000355106.3		P35573-1

Frequencies

GnomAD3 genomes

AF:

0.00720

AC:

1095

AN:

152082

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00140

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00236

Gnomad ASJ

AF:

0.00231

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00145

Gnomad FIN

AF:

0.0338

Gnomad MID

AF:

0.00318

Gnomad NFE

AF:

0.00907

Gnomad OTH

AF:

0.00478

GnomAD3 exomes

AF:

0.00843

AC:

2119

AN:

251244

Hom.:

AF XY:

0.00874

AC XY:

1186

AN XY:

135772

show subpopulations

Gnomad AFR exome

AF:

0.00105

Gnomad AMR exome

AF:

0.00234

Gnomad ASJ exome

AF:

0.00367

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00105

Gnomad FIN exome

AF:

0.0309

Gnomad NFE exome

AF:

0.0109

Gnomad OTH exome

AF:

0.00735

GnomAD4 exome

AF:

0.00839

AC:

12269

AN:

1461746

Hom.:

Cov.:

AF XY:

0.00839

AC XY:

6103

AN XY:

727180

show subpopulations

Gnomad4 AFR exome

AF:

0.000747

Gnomad4 AMR exome

AF:

0.00266

Gnomad4 ASJ exome

AF:

0.00352

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000985

Gnomad4 FIN exome

AF:

0.0301

Gnomad4 NFE exome

AF:

0.00892

Gnomad4 OTH exome

AF:

0.00667

GnomAD4 genome

AF:

0.00719

AC:

1094

AN:

152200

Hom.:

Cov.:

AF XY:

0.00808

AC XY:

601

AN XY:

74414

show subpopulations

Gnomad4 AFR

AF:

0.00137

Gnomad4 AMR

AF:

0.00235

Gnomad4 ASJ

AF:

0.00231

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00145

Gnomad4 FIN

AF:

0.0338

Gnomad4 NFE

AF:

0.00907

Gnomad4 OTH

AF:

0.00473

Alfa

AF:

0.00740

Hom.:

Bravo

AF:

0.00475

TwinsUK

AF:

0.00647

AC:

ALSPAC

AF:

0.00908

AC:

ESP6500AA

AF:

0.00182

AC:

ESP6500EA

AF:

0.00837

AC:

ExAC

AF:

0.00888

AC:

1078

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.00780

EpiControl

AF:

0.00699

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:13

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Glycogen storage disease type III

Benign:5

Dec 31, 2019

Natera, Inc.

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Feb 04, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 06, 2018

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Jul 15, 2021

Genome-Nilou Lab

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dec 28, 2017

Counsyl

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Benign:4

Nov 01, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Nov 22, 2017

Mayo Clinic Laboratories, Mayo Clinic

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Aug 29, 2017

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dec 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

AGL: BS2 -

not specified

Benign:3

Mar 28, 2016

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant identified in a genome or exome case(s) and assessed due to predicted null impact of the variant or pathogenic assertions in the literature or databases. Disclaimer: This variant has not undergone full assessment. The following are preliminary notes: Reported in a patient with two other pathogenic variants, clinical significance is uncertain. Frequency 1.8%. -

Apr 25, 2016

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Aug 23, 2016

Eurofins Ntd Llc (ga)

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

AGL-related disorder

Benign:1

Feb 23, 2022

PreventionGenetics, part of Exact Sciences

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.23

BayesDel_addAF

Benign

-0.0040

BayesDel_noAF

Pathogenic

0.23

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.45

T;T;T;T;.

Eigen

Pathogenic

0.87

Eigen_PC

Pathogenic

0.80

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.97

D;.;.;.;D

MetaRNN

Benign

0.019

T;T;T;T;T

MetaSVM

Pathogenic

0.79

MutationAssessor

Pathogenic

3.5

H;H;H;H;.

PrimateAI

Uncertain

0.72

PROVEAN

Uncertain

-4.3

D;D;D;D;D

REVEL

Pathogenic

0.89

Sift

Uncertain

0.0020

D;D;D;D;D

Sift4G

Uncertain

0.0040

D;D;D;D;D

Polyphen

1.0

D;D;D;D;D

Vest4

0.80

MVP

0.94

MPC

0.32

ClinPred

0.049

GERP RS

5.1

Varity_R

0.55

gMVP

0.86

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