ClinVar Miner

Submissions for variant NM_005592.4(MUSK):c.374G>T (p.Arg125Leu)

dbSNP: rs375737188
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Genetic Services Laboratory, University of Chicago RCV000192613 SCV000248095 likely pathogenic Congenital myasthenic syndrome 4C 2015-02-26 criteria provided, single submitter clinical testing
Invitae RCV000526130 SCV000656590 uncertain significance Fetal akinesia deformation sequence 1; Congenital myasthenic syndrome 9 2022-10-04 criteria provided, single submitter clinical testing This sequence change replaces arginine, which is basic and polar, with leucine, which is neutral and non-polar, at codon 125 of the MUSK protein (p.Arg125Leu). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. 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: 211541). 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. 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 RCV003343688 SCV004060313 uncertain significance Inborn genetic diseases 2023-08-04 criteria provided, single submitter clinical testing The c.374G>T (p.R125L) alteration is located in exon 4 (coding exon 4) of the MUSK gene. This alteration results from a G to T substitution at nucleotide position 374, causing the arginine (R) at amino acid position 125 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear.

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