Total submissions: 2
| Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
|---|---|---|---|---|---|---|---|---|
| Ambry Genetics | RCV002391819 | SCV002699777 | uncertain significance | Cardiovascular phenotype | 2023-08-03 | criteria provided, single submitter | clinical testing | The p.A474S variant (also known as c.1420G>T), located in coding exon 8 of the TBX1 gene, results from a G to T substitution at nucleotide position 1420. The alanine at codon 474 is replaced by serine, 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. |
| Labcorp Genetics |
RCV003095133 | SCV003253287 | uncertain significance | DiGeorge syndrome | 2024-04-03 | criteria provided, single submitter | clinical testing | This sequence change replaces alanine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 474 of the TBX1 protein (p.Ala474Ser). This variant is present in population databases (no rsID available, gnomAD 0.01%). This variant has not been reported in the literature in individuals affected with TBX1-related conditions. ClinVar contains an entry for this variant (Variation ID: 1772257). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. 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. |