NM_000152.5(GAA):c.77T>G (p.Leu26Arg) AND Glycogen storage disease, type II

Germline classification:: Uncertain significance (2 submissions)
Last evaluated:: Feb 19, 2022
Review status:: 1 star out of maximum of 4 stars
criteria provided, single submitter

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV000690873.8

Allele description [Variation Report for NM_000152.5(GAA):c.77T>G (p.Leu26Arg)]

NM_000152.5(GAA):c.77T>G (p.Leu26Arg)

Gene:

GAA:alpha glucosidase [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

17q25.3

Genomic location:

Preferred name:

NM_000152.5(GAA):c.77T>G (p.Leu26Arg)

HGVS:

NC_000017.11:g.80104663T>G
NG_009822.1:g.8108T>G
NM_000152.5:c.77T>GMANE SELECT
NM_001079803.3:c.77T>G
NM_001079804.3:c.77T>G
NP_000143.2:p.Leu26Arg
NP_001073271.1:p.Leu26Arg
NP_001073272.1:p.Leu26Arg
LRG_673t1:c.77T>G
LRG_673:g.8108T>G
NC_000017.10:g.78078462T>G
NM_000152.3:c.77T>G

Protein change:

L26R

Links:

dbSNP: rs1385098269

NCBI 1000 Genomes Browser:

rs1385098269

Molecular consequence:

NM_000152.5:c.77T>G - missense variant - [Sequence Ontology: SO:0001583]
NM_001079803.3:c.77T>G - missense variant - [Sequence Ontology: SO:0001583]
NM_001079804.3:c.77T>G - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Glycogen storage disease, type II (GSD2)
Synonyms:: ACID ALPHA-GLUCOSIDASE DEFICIENCY; GLYCOGENOSIS, GENERALIZED, CARDIAC FORM; GSD II; See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0009290; MedGen: C0017921; Orphanet: 365; OMIM: 232300

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000818602	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Feb 19, 2022)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV002091886	Natera, Inc.	no assertion criteria provided	Uncertain significance (Sep 22, 2021)	germline	clinical testing

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000818602

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Feb 19, 2022)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

SCV002091886

Natera, Inc.

no assertion criteria provided

Uncertain significance
(Sep 22, 2021)

germline

clinical testing

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group., Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV000818602.3

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

Description

This sequence change replaces leucine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 26 of the GAA protein (p.Leu26Arg). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with GAA-related conditions. ClinVar contains an entry for this variant (Variation ID: 570091). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt GAA protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Natera, Inc., SCV002091886.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	not provided

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Sep 29, 2024

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