ClinVar Miner

Submissions for variant NM_015443.4(KANSL1):c.850A>G (p.Ile284Val)

gnomAD frequency: 0.00002  dbSNP: rs766991003
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV001041321 SCV001204927 uncertain significance Koolen-de Vries syndrome 2021-06-29 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 isoleucine with valine at codon 284 of the KANSL1 protein (p.Ile284Val). The isoleucine residue is highly conserved and there is a small physicochemical difference between isoleucine and valine. 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. ClinVar contains an entry for this variant (Variation ID: 839541). 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. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. 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.
CeGaT Center for Human Genetics Tuebingen RCV001310365 SCV001500129 likely benign not provided 2020-07-01 criteria provided, single submitter clinical testing

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