Total submissions: 2
| Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
|---|---|---|---|---|---|---|---|---|
| Labcorp Genetics |
RCV000795027 | SCV000934465 | uncertain significance | Cowden syndrome | 2018-10-02 | criteria provided, single submitter | clinical testing | This sequence change replaces proline with threonine at codon 316 of the PIK3CA protein (p.Pro316Thr). The proline residue is highly conserved and there is a small physicochemical difference between proline and threonine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with PIK3CA-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). 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 | RCV002442631 | SCV002683223 | uncertain significance | Inborn genetic diseases | 2021-06-25 | criteria provided, single submitter | clinical testing | The p.P316T variant (also known as c.946C>A), located in coding exon 4 of the PIK3CA gene, results from a C to A substitution at nucleotide position 946. The proline at codon 316 is replaced by threonine, an amino acid with highly 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. |