Total submissions: 2
| Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
|---|---|---|---|---|---|---|---|---|
| Invitae | RCV000541009 | SCV000656574 | uncertain significance | Fetal akinesia deformation sequence 1; Congenital myasthenic syndrome 9 | 2022-10-25 | criteria provided, single submitter | clinical testing | This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 668 of the MUSK protein (p.Arg668Cys). This variant is present in population databases (rs754730206, gnomAD 0.003%). This variant has not been reported in the literature in individuals affected with MUSK-related conditions. ClinVar contains an entry for this variant (Variation ID: 476139). 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 expected to disrupt MUSK protein function. 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. |
| Ambry Genetics | RCV004024354 | SCV004935687 | uncertain significance | Inborn genetic diseases | 2023-11-29 | criteria provided, single submitter | clinical testing | The c.2002C>T (p.R668C) alteration is located in exon 15 (coding exon 15) of the MUSK gene. This alteration results from a C to T substitution at nucleotide position 2002, causing the arginine (R) at amino acid position 668 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. |