Total submissions: 1
| Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
|---|---|---|---|---|---|---|---|---|
| Invitae | RCV001056519 | SCV001220964 | uncertain significance | Koolen-de Vries syndrome | 2020-07-16 | criteria provided, single submitter | clinical testing | Due to the possible presence of a polymorphic segmental duplication, the location of the variant could not be unambiguously resolved. If the variant occurs in the KANSL1 gene, this sequence change replaces arginine with tryptophan at codon 19 of the KANSL1 protein (p.Arg19Trp). The arginine residue is highly conserved and there is a moderate physicochemical difference between arginine and tryptophan. The frequency data for this variant in the population databases (ExAC) is considered unreliable due to the presence of homologous sequence, such as pseudogenes or paralogs, in the genome. This variant has not been reported in the literature in individuals with KANSL1-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 disruptive, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. Until the location of this sequence change can be resolved, the clinical significance of this variant remains uncertain. It has been classified as a Variant of Uncertain Significance. |