NM_000238.4(KCNH2):c.2398+10G>A AND Long QT syndrome

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Aug 29, 2023
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:: RCV003768580.2

Allele description [Variation Report for NM_000238.4(KCNH2):c.2398+10G>A]

NM_000238.4(KCNH2):c.2398+10G>A

Gene:

KCNH2:potassium voltage-gated channel subfamily H member 2 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

7q36.1

Genomic location:

Preferred name:

NM_000238.4(KCNH2):c.2398+10G>A

HGVS:

NC_000007.14:g.150950158C>T
NG_008916.1:g.32769G>A
NM_000238.4:c.2398+10G>AMANE SELECT
NM_001204798.2:c.1388G>A
NM_001406755.1:c.2231G>A
NM_001406756.1:c.2120G>A
NM_001406757.1:c.2108G>A
NM_172056.3:c.2408G>A
NM_172057.3:c.1378+10G>A
NP_001191727.1:p.Trp463Ter
NP_001393684.1:p.Trp744Ter
NP_001393685.1:p.Trp707Ter
NP_001393686.1:p.Trp703Ter
NP_742053.1:p.Trp803Ter
NP_742053.1:p.Trp803Ter
LRG_288t2:c.2408G>A
LRG_288:g.32769G>A
LRG_288p2:p.Trp803Ter
NC_000007.13:g.150647246C>T
NC_000007.13:g.150647246C>T
NM_000238.2:c.2398+10G>A
NM_172056.2:c.2408G>A

Protein change:

W463*

Links:

dbSNP: rs750281789

NCBI 1000 Genomes Browser:

rs750281789

Molecular consequence:

NM_000238.4:c.2398+10G>A - intron variant - [Sequence Ontology: SO:0001627]
NM_172057.3:c.1378+10G>A - intron variant - [Sequence Ontology: SO:0001627]
NM_001204798.2:c.1388G>A - nonsense - [Sequence Ontology: SO:0001587]
NM_001406755.1:c.2231G>A - nonsense - [Sequence Ontology: SO:0001587]
NM_001406756.1:c.2120G>A - nonsense - [Sequence Ontology: SO:0001587]
NM_001406757.1:c.2108G>A - nonsense - [Sequence Ontology: SO:0001587]
NM_172056.3:c.2408G>A - nonsense - [Sequence Ontology: SO:0001587]

Condition(s)

Name:: Long QT syndrome (LQTS)
Identifiers:: MONDO: MONDO:0002442; MeSH: D008133; MedGen: C0023976

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV004622768	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Aug 29, 2023)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV004622768

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Aug 29, 2023)

germline

clinical testing

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

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, SCV004622768.1

#	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 falls in intron 9 of the KCNH2 gene. It does not directly change the encoded amino acid sequence of the KCNH2 protein. This variant is present in population databases (rs750281789, gnomAD 0.003%). This variant has not been reported in the literature in individuals affected with KCNH2-related conditions. ClinVar contains an entry for this variant (Variation ID: 669612). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. 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

Last Updated: Sep 29, 2024

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