VCV001420029.4 - ClinVar

NC_000021.8:g.(?_35742778)_(35821932_?)dup

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, single submitter

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NC_000021.8:g.(?_35742778)_(35821932_?)dup

Variation ID: 1420029 Accession: VCV001420029.4

Type and length

Duplication, 79,155 bp

Location

Cytogenetic: 21q22.11-22.12 21: 35742778-35821932 (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	Mar 28, 2022	Nov 11, 2023	Nov 3, 2022

HGVS

Nucleotide	Protein	Molecular consequence
NC_000021.8:g.(?_35742778)_(35821932_?)dup

Protein change

Other names

Canonical SPDI

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.
KCNE1		-	-	GRCh38 GRCh37	1261	1339
KCNE2		-	-	GRCh38 GRCh37	1	223
SMIM11	-	-	-	GRCh38 GRCh37	1	78

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 (1)	criteria provided, single submitter	Nov 3, 2022	RCV001943442.5
Long QT syndrome 6	Uncertain significance (1)	criteria provided, single submitter	Nov 1, 2022	RCV003120752.3

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 (Nov 03, 2022)	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: SCV002188928.3 First in ClinVar: Mar 28, 2022 Last updated: Nov 11, 2023	Publications: PubMed (1) PubMed: 25640679 Comment: A copy number gain of the genomic region encompassing the full coding sequence of the KCNE1 gene has been identified. The boundaries of this event … (more) A copy number gain of the genomic region encompassing the full coding sequence of the KCNE1 gene has been identified. The boundaries of this event are unknown as they extend beyond the assayed region for this gene and therefore may encompass additional genes. As the precise location of this event is unknown, it may be in tandem or it may be located elsewhere in the genome. Isolated whole-gene copy number gains of KCNE1 have not been reported in the literature. However, larger copy number events that include this gene have been reported (PMID: 25640679). 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 01, 2022)	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015)) Method: clinical testing	Long QT syndrome 6 Affected status: unknown Allele origin: germline	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV003796906.2 First in ClinVar: Feb 13, 2023 Last updated: Nov 11, 2023	Publications: PubMed (1) PubMed: 25640679 Comment: A copy number gain of the genomic region encompassing the full coding sequence of the KCNE2 gene has been identified. The boundaries of this event … (more) A copy number gain of the genomic region encompassing the full coding sequence of the KCNE2 gene has been identified. The boundaries of this event are unknown as they extend beyond the assayed region for this gene and therefore may encompass additional genes. As the precise location of this event is unknown, it may be in tandem or it may be located elsewhere in the genome. Isolated whole-gene copy number gains of KCNE2 have not been reported in the literature. However, larger copy number events that include this gene have been reported (PMID: 25640679). 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)

Comment:

A copy number gain of the genomic region encompassing the full coding sequence of the KCNE1 gene has been identified. The boundaries of this event are unknown as they extend beyond the assayed region for this gene and therefore may encompass additional genes. As the precise location of this event is unknown, it may be in tandem or it may be located elsewhere in the genome. Isolated whole-gene copy number gains of KCNE1 have not been reported in the literature. However, larger copy number events that include this gene have been reported (PMID: 25640679). 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:

A copy number gain of the genomic region encompassing the full coding sequence of the KCNE2 gene has been identified. The boundaries of this event are unknown as they extend beyond the assayed region for this gene and therefore may encompass additional genes. As the precise location of this event is unknown, it may be in tandem or it may be located elsewhere in the genome. Isolated whole-gene copy number gains of KCNE2 have not been reported in the literature. However, larger copy number events that include this gene have been reported (PMID: 25640679). 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.

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
Next-generation sequencing of duplication CNVs reveals that most are tandem and some create fusion genes at breakpoints.	Newman S	American journal of human genetics	2015	PMID: 25640679

Text-mined citations for this variant ...

Record last updated Sep 29, 2024

ClinVar Genomic variation as it relates to human health

NC_000021.8:g.(?_35742778)_(35821932_?)dup

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for this variant ...