ClinVar Miner

Submissions for variant NM_000218.3(KCNQ1):c.921+1G>A

dbSNP: rs397508130
Minimum review status: Collection method:
Minimum conflict level:
ClinVar version:
Total submissions: 2
Download table as spreadsheet
Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV001895718 SCV002148429 pathogenic Long QT syndrome 2023-03-27 criteria provided, single submitter clinical testing This variant is not present in population databases (gnomAD no frequency). This sequence change affects a donor splice site in intron 6 of the KCNQ1 gene. It is expected to disrupt RNA splicing. Variants that disrupt the donor or acceptor splice site typically lead to a loss of protein function (PMID: 16199547), and loss-of-function variants in KCNQ1 are known to be pathogenic (PMID: 9323054, 19862833). Disruption of this splice site has been observed in individual(s) with Jervell and Lange-Nielsen syndrome and/or long QT syndrome (PMID: 10973849; Invitae). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. For these reasons, this variant has been classified as Pathogenic. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. ClinVar contains an entry for this variant (Variation ID: 1384067).
Molecular Genetics Laboratory - Cardiogenetics, CHU de Nantes RCV003319486 SCV004024186 pathogenic Long QT syndrome 1 2023-08-01 criteria provided, single submitter clinical testing

The information on this website is not intended for direct diagnostic use or medical decision-making without review by a genetics professional. Individuals should not change their health behavior solely on the basis of information contained on this website. Neither the University of Utah nor the National Institutes of Health independently verfies the submitted information. If you have questions about the information contained on this website, please see a health care professional.