ClinVar Miner

Submissions for variant NM_139058.3(ARX):c.766G>C (p.Ala256Pro)

dbSNP: rs769056463
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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV000699383 SCV000828089 uncertain significance Developmental and epileptic encephalopathy, 1; Intellectual disability, X-linked, with or without seizures, arx-related 2018-04-18 criteria provided, single submitter clinical testing This sequence change replaces alanine with proline at codon 256 of the ARX protein (p.Ala256Pro). The alanine residue is weakly conserved and there is a small physicochemical difference between alanine and proline. While this variant is not present in population databases, the frequency information is 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 ARX-related disease. 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, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

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