ClinVar Miner

Submissions for variant NM_172107.4(KCNQ2):c.2006C>T (p.Pro669Leu)

dbSNP: rs774306858
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV000806722 SCV000946736 uncertain significance Early infantile epileptic encephalopathy with suppression bursts 2024-02-26 criteria provided, single submitter clinical testing This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 669 of the KCNQ2 protein (p.Pro669Leu). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with KCNQ2-related conditions. ClinVar contains an entry for this variant (Variation ID: 651375). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. 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.
GeneDx RCV004768668 SCV005379963 uncertain significance not provided 2024-01-03 criteria provided, single submitter clinical testing Missense variants in this gene are a common cause of disease and they are underrepresented in the general population; In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge; This substitution is predicted to be within the C-terminal cytoplasmic domain

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