ClinVar Miner

Submissions for variant NM_005592.4(MUSK):c.1235T>C (p.Val412Ala)

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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV003080811 SCV003486881 uncertain significance Fetal akinesia deformation sequence 1; Congenital myasthenic syndrome 9 2022-08-05 criteria provided, single submitter clinical testing 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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt MUSK protein function. This variant has not been reported in the literature in individuals affected with MUSK-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces valine, which is neutral and non-polar, with alanine, which is neutral and non-polar, at codon 412 of the MUSK protein (p.Val412Ala).
Women's Health and Genetics/Laboratory Corporation of America, LabCorp RCV003479472 SCV004222839 uncertain significance not specified 2023-11-17 criteria provided, single submitter clinical testing Variant summary: MUSK c.1235T>C (p.Val412Ala) results in a non-conservative amino acid change located in the Frizzled domain (IPR020067) of the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The frequency data for this variant in gnomAD is considered unreliable, as metrics indicate poor data quality at this position. To our knowledge, no occurrence of c.1235T>C in individuals affected with MUSK-Related Disorders and no experimental evidence demonstrating its impact on protein function have been reported. One submitter has cited clinical-significance assessments for this variant to ClinVar after 2014 and has classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance.

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