Total submissions: 2
| Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
|---|---|---|---|---|---|---|---|---|
| Labcorp Genetics |
RCV003614302 | SCV004379091 | uncertain significance | Bloom syndrome | 2023-11-24 | criteria provided, single submitter | clinical testing | This sequence change replaces threonine, which is neutral and polar, with lysine, which is basic and polar, at codon 747 of the BLM protein (p.Thr747Lys). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with BLM-related conditions. 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 BLM protein function with a negative predictive value of 80%. 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 | RCV004371525 | SCV005022413 | uncertain significance | Hereditary cancer-predisposing syndrome | 2023-10-22 | criteria provided, single submitter | clinical testing | The p.T747K variant (also known as c.2240C>A), located in coding exon 9 of the BLM gene, results from a C to A substitution at nucleotide position 2240. The threonine at codon 747 is replaced by lysine, 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. |