VCV000628813.22 - ClinVar

NM_000218.3(KCNQ1):c.1375G>A (p.Asp459Asn)

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.

(9)

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.

Conflicting classifications of pathogenicity
Uncertain significance(8); Likely benign(1)

criteria provided, conflicting classifications

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_000218.3(KCNQ1):c.1375G>A (p.Asp459Asn)

Variation ID: 628813 Accession: VCV000628813.22

Type and length

single nucleotide variant, 1 bp

Location

Cytogenetic: 11p15.5 11: 2588836 (GRCh38) [ NCBI UCSC ] 11: 2610066 (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 20, 2019	Aug 11, 2024	May 14, 2024

HGVS

Nucleotide	Protein	Molecular consequence
NM_000218.3:c.1375G>A MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_000209.2:p.Asp459Asn	missense
NM_001406836.1:c.1279G>A	NP_001393765.1:p.Asp427Asn	missense
NM_001406837.1:c.1105G>A	NP_001393766.1:p.Asp369Asn	missense
NM_001406838.1:c.835G>A	NP_001393767.1:p.Asp279Asn	missense
NM_181798.2:c.994G>A	NP_861463.1:p.Asp332Asn	missense
NR_040711.2:n.1268G>A
NC_000011.10:g.2588836G>A
NC_000011.9:g.2610066G>A
NG_008935.1:g.148846G>A
LRG_287:g.148846G>A
LRG_287t1:c.1375G>A	LRG_287p1:p.Asp459Asn
LRG_287t2:c.994G>A	LRG_287p2:p.Asp332Asn

... more HGVS ... less HGVS

Protein change

D332N, D459N, D279N, D369N, D427N

Other names

Canonical SPDI

NC_000011.10:2588835:G:A

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.

Trans-Omics for Precision Medicine (TOPMed) 0.00002

Exome Aggregation Consortium (ExAC) 0.00003

The Genome Aggregation Database (gnomAD) 0.00003

The Genome Aggregation Database (gnomAD), exomes 0.00004

Links

dbSNP: rs747704276 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.
KCNQ1		Sufficient evidence for dosage pathogenicity	No evidence available	GRCh38 GRCh38 GRCh37	1720	2663

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.
Long QT syndrome	Uncertain significance (2)	criteria provided, multiple submitters, no conflicts	Dec 29, 2023	RCV001071913.15
Long QT syndrome 1	Uncertain significance (1)	criteria provided, single submitter	Jan 12, 2018	RCV001105970.12
Jervell and Lange-Nielsen syndrome 1	Uncertain significance (1)	criteria provided, single submitter	Jan 12, 2018	RCV001105971.12
Short QT syndrome type 2	Likely benign (1)	criteria provided, single submitter	Jan 12, 2018	RCV001105969.12
Atrial fibrillation, familial, 3	Uncertain significance (1)	criteria provided, single submitter	Jan 12, 2018	RCV001105968.12
not provided	Uncertain significance (1)	criteria provided, single submitter	Jul 20, 2023	RCV001772029.11
Cardiac arrhythmia	Uncertain significance (1)	criteria provided, single submitter	Feb 22, 2023	RCV001841898.11
Cardiovascular phenotype	Uncertain significance (1)	criteria provided, single submitter	May 14, 2024	RCV002386338.10

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 (Jan 12, 2018)	criteria provided, single submitter (ICSL Variant Classification Criteria 13 December 2019) Method: clinical testing	Atrial fibrillation, familial, 3 Affected status: unknown Allele origin: germline	Illumina Laboratory Services, Illumina Accession: SCV001262992.1 First in ClinVar: May 31, 2020 Last updated: May 31, 2020	Comment: 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 … (more) 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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. (less)
Likely benign (Jan 12, 2018)	criteria provided, single submitter (ICSL Variant Classification Criteria 13 December 2019) Method: clinical testing	Short QT syndrome type 2 Affected status: unknown Allele origin: germline	Illumina Laboratory Services, Illumina Accession: SCV001262993.1 First in ClinVar: May 31, 2020 Last updated: May 31, 2020	Comment: 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 … (more) 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. (less)
Uncertain significance (Jan 12, 2018)	criteria provided, single submitter (ICSL Variant Classification Criteria 13 December 2019) Method: clinical testing	Jervell and Lange-Nielsen syndrome 1 Affected status: unknown Allele origin: germline	Illumina Laboratory Services, Illumina Accession: SCV001262995.1 First in ClinVar: May 31, 2020 Last updated: May 31, 2020	Comment: 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 … (more) 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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. (less)
Uncertain significance (Jan 12, 2018)	criteria provided, single submitter (ICSL Variant Classification Criteria 13 December 2019) Method: clinical testing	Long QT syndrome 1 Affected status: unknown Allele origin: germline	Illumina Laboratory Services, Illumina Accession: SCV001262994.1 First in ClinVar: May 31, 2020 Last updated: May 31, 2020	Comment: 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 … (more) 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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. (less)
Uncertain significance (Jul 20, 2023)	criteria provided, single submitter (GeneDx Variant Classification Process June 2021) Method: clinical testing	Not Provided Affected status: yes Allele origin: germline	GeneDx Accession: SCV001994083.3 First in ClinVar: Nov 06, 2021 Last updated: Jul 29, 2023	Comment: Has not been previously published as pathogenic or benign to our knowledge; In silico analysis supports that this missense variant does not alter protein structure/function
Uncertain significance (Feb 22, 2023)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	Cardiac arrhythmia Affected status: unknown Allele origin: germline	Color Diagnostics, LLC DBA Color Health Accession: SCV000907170.5 First in ClinVar: May 20, 2019 Last updated: Feb 14, 2024	Comment: This missense variant replaces aspartic acid with asparagine at codon 459 of the KCNQ1 protein. Computational prediction is inconclusive regarding the impact of this variant … (more) This missense variant replaces aspartic acid with asparagine at codon 459 of the KCNQ1 protein. Computational prediction is inconclusive regarding the impact of this variant on protein structure and function (internally defined REVEL score threshold 0.5 < inconclusive < 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with KCNQ1-related disorders in the literature. This variant has been identified in 10/280428 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)
Uncertain significance (Dec 29, 2023)	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015)) Method: clinical testing	Long QT syndrome Affected status: unknown Allele origin: germline	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV001237245.4 First in ClinVar: Apr 15, 2020 Last updated: Feb 20, 2024	Comment: This sequence change replaces aspartic acid, which is acidic and polar, with asparagine, which is neutral and polar, at codon 459 of the KCNQ1 protein … (more) This sequence change replaces aspartic acid, which is acidic and polar, with asparagine, which is neutral and polar, at codon 459 of the KCNQ1 protein (p.Asp459Asn). This variant is present in population databases (rs747704276, gnomAD 0.06%). This variant has not been reported in the literature in individuals affected with KCNQ1-related conditions. ClinVar contains an entry for this variant (Variation ID: 628813). 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 KCNQ1 protein function with a negative predictive value of 80%. 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. (less)
Uncertain Significance (Nov 02, 2023)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	Long QT syndrome (Autosomal dominant inheritance) Affected status: unknown Allele origin: germline	All of Us Research Program, National Institutes of Health Accession: SCV004836431.1 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)	Comment: This missense variant replaces aspartic acid with asparagine at codon 459 of the KCNQ1 protein. Computational prediction is inconclusive regarding the impact of this variant … (more) This missense variant replaces aspartic acid with asparagine at codon 459 of the KCNQ1 protein. Computational prediction is inconclusive regarding the impact of this variant on protein structure and function (internally defined REVEL score threshold 0.5 < inconclusive < 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with cardiovascular disorders in the literature. This variant has been identified in 10/280428 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) Number of individuals with the variant: 5
Uncertain significance (May 14, 2024)	criteria provided, single submitter (Ambry Variant Classification Scheme 2023) Method: clinical testing	Cardiovascular phenotype Affected status: unknown Allele origin: germline	Ambry Genetics Accession: SCV002702531.3 First in ClinVar: Nov 29, 2022 Last updated: Aug 11, 2024	Comment: The p.D459N variant (also known as c.1375G>A), located in coding exon 10 of the KCNQ1 gene, results from a G to A substitution at nucleotide … (more) The p.D459N variant (also known as c.1375G>A), located in coding exon 10 of the KCNQ1 gene, results from a G to A substitution at nucleotide position 1375. The aspartic acid at codon 459 is replaced by asparagine, an amino acid with highly similar properties. This amino acid position is well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Based on the available evidence, the clinical significance of this variant remains unclear. (less)

Comment:

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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease.

Comment:

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.

Comment:

This missense variant replaces aspartic acid with asparagine at codon 459 of the KCNQ1 protein. Computational prediction is inconclusive regarding the impact of this variant on protein structure and function (internally defined REVEL score threshold 0.5 < inconclusive < 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with KCNQ1-related disorders in the literature. This variant has been identified in 10/280428 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:

This sequence change replaces aspartic acid, which is acidic and polar, with asparagine, which is neutral and polar, at codon 459 of the KCNQ1 protein (p.Asp459Asn). This variant is present in population databases (rs747704276, gnomAD 0.06%). This variant has not been reported in the literature in individuals affected with KCNQ1-related conditions. ClinVar contains an entry for this variant (Variation ID: 628813). 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 KCNQ1 protein function with a negative predictive value of 80%. 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.

Comment:

This missense variant replaces aspartic acid with asparagine at codon 459 of the KCNQ1 protein. Computational prediction is inconclusive regarding the impact of this variant on protein structure and function (internally defined REVEL score threshold 0.5 < inconclusive < 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with cardiovascular disorders in the literature. This variant has been identified in 10/280428 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:

The p.D459N variant (also known as c.1375G>A), located in coding exon 10 of the KCNQ1 gene, results from a G to A substitution at nucleotide position 1375. The aspartic acid at codon 459 is replaced by asparagine, an amino acid with highly similar properties. This amino acid position is well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Based on the available evidence, the clinical significance of this variant 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:

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.

Comment:

This missense variant replaces aspartic acid with asparagine at codon 459 of the KCNQ1 protein. Computational prediction is inconclusive regarding the impact of this variant on protein structure and function (internally defined REVEL score threshold 0.5 < inconclusive < 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with cardiovascular disorders in the literature. This variant has been identified in 10/280428 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:

Citations for germline classification of this variant

There are no citations for germline classification of this variant in ClinVar. If you know of citations for this variation, please consider submitting that information to ClinVar.

Text-mined citations for rs747704276 ...

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 Oct 27, 2024

ClinVar Genomic variation as it relates to human health

NM_000218.3(KCNQ1):c.1375G>A (p.Asp459Asn)

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for rs747704276 ...