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NM_000238.4(KCNH2):c.2774_2775delinsTT (p.Gly925Val) AND Long QT syndrome

Germline classification:
Uncertain significance (1 submission)
Last evaluated:
Aug 9, 2022
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:
RCV001367745.7

Allele description [Variation Report for NM_000238.4(KCNH2):c.2774_2775delinsTT (p.Gly925Val)]

NM_000238.4(KCNH2):c.2774_2775delinsTT (p.Gly925Val)

Gene:
KCNH2:potassium voltage-gated channel subfamily H member 2 [Gene - OMIM - HGNC]
Variant type:
Indel
Cytogenetic location:
7q36.1
Genomic location:
Preferred name:
NM_000238.4(KCNH2):c.2774_2775delinsTT (p.Gly925Val)
HGVS:
  • NC_000007.14:g.150947796_150947797delinsAA
  • NG_008916.1:g.35130_35131delinsTT
  • NM_000238.4:c.2774_2775delinsTTMANE SELECT
  • NM_172057.3:c.1754_1755delinsTT
  • NP_000229.1:p.Gly925Val
  • NP_742054.1:p.Gly585Val
  • LRG_288:g.35130_35131delinsTT
  • NC_000007.13:g.150644884_150644885delinsAA
Protein change:
G585V
Links:
dbSNP: rs2116933373
NCBI 1000 Genomes Browser:
rs2116933373
Molecular consequence:
  • NM_000238.4:c.2774_2775delinsTT - missense variant - [Sequence Ontology: SO:0001583]
  • NM_172057.3:c.1754_1755delinsTT - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

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

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Assertion and evidence details

Submission AccessionSubmitterReview Status
(Assertion method)
Clinical Significance
(Last evaluated)
OriginMethodCitations
SCV001564108Labcorp Genetics (formerly Invitae), Labcorp
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))
Uncertain significance
(Aug 9, 2022)
germlineclinical testing

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

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical 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, SCV001564108.4

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (1)

Description

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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available"). ClinVar contains an entry for this variant (Variation ID: 1058588). This variant has not been reported in the literature in individuals affected with KCNH2-related conditions. Information on the frequency of this variant in the gnomAD database is not available, as this variant may be reported differently in the database. This sequence change replaces glycine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 925 of the KCNH2 protein (p.Gly925Val).

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

Last Updated: Sep 29, 2024