ClinVar Miner

Submissions for variant NM_015443.4(KANSL1):c.623G>A (p.Cys208Tyr)

gnomAD frequency: 0.00001  dbSNP: rs762448559
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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV001996602 SCV002218919 uncertain significance Koolen-de Vries syndrome 2021-09-17 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 cysteine with tyrosine at codon 208 of the KANSL1 protein (p.Cys208Tyr). The cysteine residue is highly conserved and there is a large physicochemical difference between cysteine and tyrosine. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the ExAC database. 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 are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). 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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