ClinVar Miner

Submissions for variant NM_015443.4(KANSL1):c.518C>T (p.Ser173Phe)

gnomAD frequency: 0.00006  dbSNP: rs750012482
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV001324680 SCV001515641 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 serine with phenylalanine at codon 173 of the KANSL1 protein (p.Ser173Phe). The serine residue is highly conserved and there is a large physicochemical difference between serine and phenylalanine. 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: 1024494). 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.
Ambry Genetics RCV003246881 SCV003952675 uncertain significance Inborn genetic diseases 2023-05-24 criteria provided, single submitter clinical testing The c.518C>T (p.S173F) alteration is located in exon 2 (coding exon 1) of the KANSL1 gene. This alteration results from a C to T substitution at nucleotide position 518, causing the serine (S) at amino acid position 173 to be replaced by a phenylalanine (F). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear.

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