ClinVar Miner

Submissions for variant NM_015443.4(KANSL1):c.1004T>G (p.Leu335Trp)

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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV002027537 SCV002309604 uncertain significance Koolen-de Vries syndrome 2021-07-04 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. Variants with ambiguous mapping are still reported relative to the KANSL1 transcript. This sequence change replaces leucine with tryptophan at codon 335 of the KANSL1 protein (p.Leu335Trp). The leucine residue is highly conserved and there is a small physicochemical difference between leucine 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. 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.

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