VCV001778395.5 - ClinVar

NM_004982.4(KCNJ8):c.1055G>A (p.Arg352Gln)

Germline

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.

(2)

Stars represent the aggregate review status, or the level of review supporting the aggregate germline classification for this VCV record. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status. The number of submissions which contribute to this review status is shown in parentheses.

Uncertain significance

criteria provided, multiple submitters, no conflicts

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_004982.4(KCNJ8):c.1055G>A (p.Arg352Gln)

Variation ID: 1778395 Accession: VCV001778395.5

Type and length

single nucleotide variant, 1 bp

Location

Cytogenetic: 12p12.1 12: 21765943 (GRCh38) [ NCBI UCSC ] 12: 21918877 (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	Nov 29, 2022	May 1, 2024	Jan 31, 2024

HGVS

Nucleotide	Protein	Molecular consequence
NM_004982.4:c.1055G>A MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_004973.1:p.Arg352Gln	missense
NC_000012.12:g.21765943C>T
NC_000012.11:g.21918877C>T
NG_041794.1:g.13879G>A

Protein change

Other names

Canonical SPDI

NC_000012.12:21765942:C:T

Functional consequence Help The effect of the variant on RNA or protein function, based on experimental evidence from submitters.

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.

Links

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.
KCNJ8		-	-	GRCh38 GRCh37	199	243

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.
Cardiovascular phenotype	Uncertain significance (1)	criteria provided, single submitter	Jan 31, 2024	RCV002406340.9
Brugada syndrome	Uncertain significance (1)	criteria provided, single submitter	Sep 26, 2023	RCV003108083.11

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.	More information 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 (Sep 26, 2023)	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015)) Method: clinical testing	Brugada syndrome Affected status: unknown Allele origin: germline	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV003780676.2 First in ClinVar: Feb 13, 2023 Last updated: Feb 20, 2024	Comment: 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 … (more) 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. 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 KCNJ8 protein function. This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 352 of the KCNJ8 protein (p.Arg352Gln). This variant is present in population databases (rs747622709, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with KCNJ8-related conditions. ClinVar contains an entry for this variant (Variation ID: 1778395). (less)
Uncertain significance (Jan 31, 2024)	criteria provided, single submitter (Ambry Variant Classification Scheme 2023) Method: clinical testing	Cardiovascular phenotype Affected status: unknown Allele origin: germline	Ambry Genetics Accession: SCV002710176.2 First in ClinVar: Nov 29, 2022 Last updated: May 01, 2024	Publications: PubMed (1) PubMed: 27711072 Comment: The p.R352Q variant (also known as c.1055G>A), located in coding exon 2 of the KCNJ8 gene, results from a G to A substitution at nucleotide … (more) The p.R352Q variant (also known as c.1055G>A), located in coding exon 2 of the KCNJ8 gene, results from a G to A substitution at nucleotide position 1055. The arginine at codon 352 is replaced by glutamine, an amino acid with highly similar properties. In one study, this variant was identified in an exome cohort, and was not associated with J-point elevation (Ghouse J et al. Genet. Med., 2017 05;19:521-528). This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. (less)

Comment:

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. 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 KCNJ8 protein function. This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 352 of the KCNJ8 protein (p.Arg352Gln). This variant is present in population databases (rs747622709, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with KCNJ8-related conditions. ClinVar contains an entry for this variant (Variation ID: 1778395).

Comment:

The p.R352Q variant (also known as c.1055G>A), located in coding exon 2 of the KCNJ8 gene, results from a G to A substitution at nucleotide position 1055. The arginine at codon 352 is replaced by glutamine, an amino acid with highly similar properties. In one study, this variant was identified in an exome cohort, and was not associated with J-point elevation (Ghouse J et al. Genet. Med., 2017 05;19:521-528). This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

Germline Functional Evidence

There is no functional evidence in ClinVar for this variation. If you have generated functional data for this variation, please consider submitting that data to ClinVar.

Comment:

Citations for germline classification of this variant

Title	Author	Journal	Year	Link
Numerous Brugada syndrome-associated genetic variants have no effect on J-point elevation, syncope susceptibility, malignant cardiac arrhythmia, and all-cause mortality.	Ghouse J	Genetics in medicine : official journal of the American College of Medical Genetics	2017	PMID: 27711072

Text-mined citations for this variant ...

Record last updated Sep 29, 2024

ClinVar Genomic variation as it relates to human health

NM_004982.4(KCNJ8):c.1055G>A (p.Arg352Gln)

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for this variant ...