ClinVar Miner

Submissions for variant NM_003334.4(UBA1):c.2329G>A (p.Gly777Arg)

gnomAD frequency: 0.00001  dbSNP: rs868922840
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV000443698 SCV000534579 uncertain significance not provided 2019-01-17 criteria provided, single submitter clinical testing The G777R variant in the UBA1 gene has not been reported previously as a pathogenic variant, nor as a benign variant, to our knowledge. This variant was not observed in approximately 6500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. The G777R variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. This substitution occurs at a position that is conserved across species. In silico analysis predicts this variant is probably damaging to the protein structure/function. We interpret G777R as a variant of uncertain significance.
Invitae RCV001861629 SCV002299276 uncertain significance Infantile-onset X-linked spinal muscular atrophy 2022-08-03 criteria provided, single submitter clinical testing This variant is present in population databases (no rsID available, gnomAD 0.008%). 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. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. 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. ClinVar contains an entry for this variant (Variation ID: 391497). This variant has not been reported in the literature in individuals affected with UBA1-related conditions. This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 777 of the UBA1 protein (p.Gly777Arg).

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