ClinVar Miner

Submissions for variant NM_172107.4(KCNQ2):c.2276dup (p.Asn759fs)

dbSNP: rs2079962041
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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV001047786 SCV001211766 pathogenic Early infantile epileptic encephalopathy with suppression bursts 2019-06-27 criteria provided, single submitter clinical testing For these reasons, this variant has been classified as Pathogenic. This variant disrupts the C-terminus of the KCNQ2 protein. Other variant(s) that disrupt this region (p.Cys774Leufs*91) have been determined to be pathogenic (PMID: 23692823). This suggests that variants that disrupt this region of the protein are likely to be causative of disease. This variant has not been reported in the literature in individuals with KCNQ2-related conditions. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate insufficient coverage at this position in the ExAC database. This sequence change results in a premature translational stop signal in the KCNQ2 gene (p.Asn759Lysfs*106). While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 114 amino acids of the KCNQ2 protein.

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