Total submissions: 2
| Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
|---|---|---|---|---|---|---|---|---|
| Invitae | RCV000818657 | SCV000959282 | uncertain significance | Tuberous sclerosis 2 | 2018-08-02 | criteria provided, single submitter | clinical testing | This sequence change replaces histidine with leucine at codon 1773 of the TSC2 protein (p.His1773Leu). The histidine residue is weakly conserved and there is a moderate physicochemical difference between histidine and leucine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with TSC2-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. |
| Ambry Genetics | RCV003166378 | SCV003865880 | uncertain significance | Hereditary cancer-predisposing syndrome | 2023-01-16 | criteria provided, single submitter | clinical testing | The p.H1773L variant (also known as c.5318A>T), located in coding exon 41 of the TSC2 gene, results from an A to T substitution at nucleotide position 5318. The histidine at codon 1773 is replaced by leucine, an amino acid with similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. |