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NM_004700.4(KCNQ4):c.818C>G (p.Ser273Trp) AND KCNQ4-related disorder

Germline classification:
Uncertain significance (1 submission)
Last evaluated:
Apr 12, 2024
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
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:
RCV003983360.3

Allele description [Variation Report for NM_004700.4(KCNQ4):c.818C>G (p.Ser273Trp)]

NM_004700.4(KCNQ4):c.818C>G (p.Ser273Trp)

Gene:
KCNQ4:potassium voltage-gated channel subfamily Q member 4 [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
1p34.2
Genomic location:
Preferred name:
NM_004700.4(KCNQ4):c.818C>G (p.Ser273Trp)
HGVS:
  • NC_000001.11:g.40819456C>G
  • NG_008139.3:g.40670C>G
  • NM_004700.4:c.818C>GMANE SELECT
  • NM_172163.3:c.818C>G
  • NP_004691.2:p.Ser273Trp
  • NP_751895.1:p.Ser273Trp
  • LRG_1378t1:c.818C>G
  • LRG_1378:g.40670C>G
  • LRG_1378p1:p.Ser273Trp
  • NC_000001.10:g.41285128C>G
  • NM_004700.3:c.818C>G
Protein change:
S273W
Molecular consequence:
  • NM_004700.4:c.818C>G - missense variant - [Sequence Ontology: SO:0001583]
  • NM_172163.3:c.818C>G - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:
KCNQ4-related disorder
Synonyms:
KCNQ4-related condition
Identifiers:

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Assertion and evidence details

Help
Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV004800310PreventionGenetics, part of Exact Sciences
no assertion criteria provided
Uncertain significance
(Apr 12, 2024) 		germlineclinical testing

Help

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical testing

Details of each submission

From PreventionGenetics, part of Exact Sciences, SCV004800310.2

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testingnot provided

Description

The KCNQ4 c.818C>G variant is predicted to result in the amino acid substitution p.Ser273Trp. To our knowledge, this variant has not been reported in the literature or in a large population database, indicating this variant is rare. The KCNQ4 pore forming region (amino acids 270 – 297) is considered a mutational hotspot due to intolerance to missense variation in the general population and enrichment of pathogenic missense variants in patients with autosomal dominant hearing loss (ClinGen Hearing Loss Variant Curation Expert Panel, Oza et al. 2018. PubMed ID: 30311386; Naito et al. 2013. PubMed ID: 23717403). Although we suspect that this variant may be pathogenic, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence.

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

Last Updated: Oct 13, 2024