Total submissions: 1
Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
---|---|---|---|---|---|---|---|---|
Invitae | RCV001219677 | SCV001391627 | uncertain significance | Benign neonatal seizures | 2019-06-06 | criteria provided, single submitter | clinical testing | This sequence change replaces tyrosine with phenylalanine at codon 687 of the KCNQ3 protein (p.Tyr687Phe). The tyrosine residue is highly conserved and there is a small physicochemical difference between tyrosine and phenylalanine. This variant is present in population databases (rs757584140, ExAC 0.001%). This variant has not been reported in the literature in individuals with KCNQ3-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. 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. |