VCV000533875.15 - ClinVar

NM_016203.4(PRKAG2):c.56G>A (p.Gly19Glu)

Germline

Classification

criteria provided, conflicting classifications. Learn more about how ClinVar calculates review status.

Conflicting classifications of pathogenicity
Uncertain significance (4); Benign (1)

5 out of 5 submissions contributed to this classification

The aggregate germline classification for this variant, typically for a monogenic or Mendelian disorder as in the ACMG/AMP guidelines, or for response to a drug. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the aggregate classification.

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_016203.4(PRKAG2):c.56G>A (p.Gly19Glu)

Variation ID: 533875 Accession: VCV000533875.15

Type and length

single nucleotide variant, 1 bp

Location

Cytogenetic: 7q36.1 7: 151876565 (GRCh38) [ NCBI UCSC ] 7: 151573650 (GRCh37) [ NCBI UCSC ]

Timeline in ClinVar

	First in ClinVar Help The date this variant first appeared in ClinVar with each type of classification.	Last submission Help The date of the most recent submission for each type of classification for this variant.	Last evaluated Help The most recent date that a submitter evaluated this variant for each type of classification.
Germline	May 28, 2018	Mar 7, 2026	Jul 30, 2024

HGVS

Nucleotide	Protein	Molecular consequence
NM_016203.4:c.56G>A MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_057287.2:p.Gly19Glu	missense
NC_000007.14:g.151876565C>T
NC_000007.13:g.151573650C>T
NG_007486.1:g.5667G>A
LRG_430t1:c.56G>A	LRG_430p1:p.Gly19Glu

... more HGVS ... less HGVS

Protein change

G19E

Other names

Canonical SPDI

NC_000007.14:151876564:C:T

Global minor allele frequency (GMAF) Help The global minor allele frequency calculated by the 1000 Genomes Project. The minor allele at this location is indicated in parentheses and may be different from the allele represented by this VCV record.

Allele frequency Help The frequency of the allele represented by this VCV record.

The Genome Aggregation Database (gnomAD), exomes 0.00000

The Genome Aggregation Database (gnomAD) 0.00001

The Genome Aggregation Database (gnomAD), exomes 0.00001

Links

ClinGen: CA169183671 dbSNP: rs368522976 VarSome

Genes

Gene	OMIM	ClinGen Gene Dosage Sensitivity Curation		Variation Viewer Help Links to Variation Viewer, a genome browser to view variation data from NCBI databases.	Related variants
Gene	OMIM	HI score Help The haploinsufficiency score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.	TS score Help The triplosensitivity score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.		Within gene Help The number of variants in ClinVar that are contained within this gene, with a link to view the list of variants.	All Help The number of variants in ClinVar for this gene, including smaller variants within the gene and larger CNVs that overlap or fully contain the gene.
PRKAG2		No evidence available	No evidence available	GRCh38 GRCh37	1399	1604

Conditions - Germline

Condition Help The condition for this variant-condition (RCV) record in ClinVar.	Classification Help The aggregate germline classification for this variant-condition (RCV) record in ClinVar. The number of submissions that contribute to this aggregate classification is shown in parentheses. (# of submissions)	Review status Help The aggregate review status for this variant-condition (RCV) record in ClinVar. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status.	Last evaluated Help The most recent date that a submitter evaluated this variant for the condition.	Variation/condition record Help The RCV accession number, with most recent version number, for the variant-condition record, with a link to the RCV web page.
Lethal congenital glycogen storage disease of heart	Benign (1)	criteria provided, single submitter	Jul 30, 2024	RCV000641180.7
Cardiomyopathy	Uncertain significance (1)	criteria provided, single submitter	Nov 14, 2023	RCV001524936.4
not provided	Uncertain significance (1)	criteria provided, single submitter	Aug 21, 2020	RCV001712773.2
Cardiovascular phenotype	Uncertain significance (1)	criteria provided, single submitter	Aug 12, 2020	RCV002343276.2
Hypertrophic cardiomyopathy	Uncertain significance (1)	criteria provided, single submitter	Dec 13, 2023	RCV004003918.2

Submissions - Germline

Classification Help The submitted germline classification for each SCV record. (Last evaluated)	Review status Help Stars represent the review status, or the level of review supporting the submitted (SCV) record. This value is calculated by NCBI based on data from the submitter. Read our rules for calculating the review status. This column also includes a link to the submitter’s assertion criteria if provided, and the collection method. (Assertion criteria)	Condition Help The condition for the classification, provided by the submitter for this submitted (SCV) record. This column also includes the affected status and allele origin of individuals observed with this variant.	Submitter Help The submitting organization for this submitted (SCV) record. This column also includes the SCV accession and version number, the date this SCV first appeared in ClinVar, and the date that this SCV was last updated in ClinVar.	Expand all rows Collapse all rows Help This column includes more information supporting the classification, including citations, the comment on classification, and detailed evidence provided as observations of the variant by the submitter.
Uncertain significance (Nov 14, 2023) C Contributing to aggregate classification	criteria provided, single submitter (ACMG Guidelines, 2015)	Cardiomyopathy	Color Diagnostics, LLC DBA Color Health Accession: SCV001734917.3 First in ClinVar: Jun 19, 2021 Last updated: May 03, 2025	Publications: PubMed (1) PubMed: 28341588 Comment: show This missense variant replaces glycine with glutamic acid at codon 19 of the PRKAG2 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in homozygosity in an individual suspected of having a primary electrical disease (PMID: 28341588). This variant has been identified in 2/248682 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. (less) Observation: 1 Collection method: clinical testing Allele origin: germline Affected status: unknown more Observation 1 Collection method: clinical testing Allele origin: germline Affected status: unknown Platform type: NGS

Benign (Jul 30, 2024) C Contributing to aggregate classification	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Lethal congenital glycogen storage disease of heart	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV000762818.6 First in ClinVar: May 28, 2018 Last updated: Mar 07, 2026	Observation: 1 Collection method: clinical testing Allele origin: germline Affected status: unknown Observation 1 Collection method: clinical testing Allele origin: germline Affected status: unknown

Uncertain significance (Aug 21, 2020) C Contributing to aggregate classification	criteria provided, single submitter (GeneDx Variant Classification Process June 2021)	not provided	GeneDx Accession: SCV001942773.2 First in ClinVar: Sep 29, 2021 Last updated: Mar 04, 2023	Comment: show Reported as a likely benign variant in a patient with long QT syndrome (Proost et al., 2017); Not observed at a significant frequency in large population cohorts (Lek et al., 2016); In silico analysis supports that this missense variant does not alter protein structure/function; Reported in ClinVar as a variant of uncertain significance (ClinVar Variant ID# 533875; Landrum et al., 2016); This variant is associated with the following publications: (PMID: 28341588) (less) Observation: 1 Collection method: clinical testing Allele origin: germline Affected status: yes Observation 1 Collection method: clinical testing Allele origin: germline Affected status: yes

Uncertain Significance (Dec 13, 2023) C Contributing to aggregate classification	criteria provided, single submitter (ACMG Guidelines, 2015)	Hypertrophic cardiomyopathy (Autosomal dominant inheritance)	All of Us Research Program, National Institutes of Health Accession: SCV004842344.1 First in ClinVar: Apr 20, 2024 Last updated: Apr 20, 2024 Comment: This study involves interpretation of variants in research participants for the purpose of population health screening. Participant phenotype was not available at the time of … (more) This study involves interpretation of variants in research participants for the purpose of population health screening. Participant phenotype was not available at the time of variant classification. Additional details can be found in publication PMID: 35346344, PMCID: PMC8962531 (less)	Publications: PubMed (1) PubMed: 28341588 Comment: show This missense variant replaces glycine with glutamic acid at codon 19 of the PRKAG2 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in homozygosity in an individual suspected of having a primary electrical disease (PMID: 28341588). This variant has been identified in 2/248682 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. (less) Observation: 1 Collection method: clinical testing Allele origin: germline Affected status: unknown more Observation 1 Collection method: clinical testing Allele origin: germline Affected status: unknown Number of individuals with the variant: 1 Zygosity: 1 Single Heterozygote

Uncertain significance (Aug 12, 2020) C Contributing to aggregate classification	criteria provided, single submitter (Ambry Variant Classification Scheme 2023)	Cardiovascular phenotype	Ambry Genetics Accession: SCV002647550.2 First in ClinVar: Nov 29, 2022 Last updated: May 01, 2024	Publications: PubMed (1) PubMed: 28341588 Comment: show The p.G19E variant (also known as c.56G>A), located in coding exon 1 of the PRKAG2 gene, results from a G to A substitution at nucleotide position 56. The glycine at codon 19 is replaced by glutamic acid, an amino acid with similar properties. This variant was reportedly identified as homozygous in an individual with long QT syndrome (LQTS); however clinical details were limited (Proost D et al. J Mol Diagn, 2017 05;19:445-459). This amino acid position is well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. (less) Observation: 1 Collection method: clinical testing Allele origin: germline Affected status: unknown Observation 1 Collection method: clinical testing Allele origin: germline Affected status: unknown

Comment:

This missense variant replaces glycine with glutamic acid at codon 19 of the PRKAG2 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in homozygosity in an individual suspected of having a primary electrical disease (PMID: 28341588). This variant has been identified in 2/248682 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance.

Comment:

Reported as a likely benign variant in a patient with long QT syndrome (Proost et al., 2017); Not observed at a significant frequency in large population cohorts (Lek et al., 2016); In silico analysis supports that this missense variant does not alter protein structure/function; Reported in ClinVar as a variant of uncertain significance (ClinVar Variant ID# 533875; Landrum et al., 2016); This variant is associated with the following publications: (PMID: 28341588)

Comment:

The p.G19E variant (also known as c.56G>A), located in coding exon 1 of the PRKAG2 gene, results from a G to A substitution at nucleotide position 56. The glycine at codon 19 is replaced by glutamic acid, an amino acid with similar properties. This variant was reportedly identified as homozygous in an individual with long QT syndrome (LQTS); however clinical details were limited (Proost D et al. J Mol Diagn, 2017 05;19:445-459). This amino acid position is well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

Citations for germline classification of this variant

Title	Author	Journal	Year	Link
Targeted Next-Generation Sequencing of 51 Genes Involved in Primary Electrical Disease.	Proost D	The Journal of molecular diagnostics : JMD	2017	PMID: 28341588

Text-mined citations for rs368522976 ...

These citations are identified by LitVar using the rs number, so they may include citations for more than one variant at this location. Please review the LitVar results carefully for your variant of interest.

Record last updated Apr 13, 2026