Total submissions: 4
| Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
|---|---|---|---|---|---|---|---|---|
| Invitae | RCV003535890 | SCV000937484 | uncertain significance | Familial adenomatous polyposis 1 | 2023-12-16 | criteria provided, single submitter | clinical testing | This sequence change replaces isoleucine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 66 of the APC protein (p.Ile66Thr). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with biliary tract cancer (PMID: 36243179). ClinVar contains an entry for this variant (Variation ID: 644058). 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 APC protein function with a negative predictive value of 95%. 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 | RCV001013942 | SCV001174588 | uncertain significance | Hereditary cancer-predisposing syndrome | 2022-04-20 | criteria provided, single submitter | clinical testing | The p.I66T variant (also known as c.197T>C), located in coding exon 2 of the APC gene, results from a T to C substitution at nucleotide position 197. The isoleucine at codon 66 is replaced by threonine, an amino acid with similar properties. This amino acid position is well conserved in available vertebrate species. 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. |
| Color Diagnostics, |
RCV001013942 | SCV001341735 | uncertain significance | Hereditary cancer-predisposing syndrome | 2023-03-16 | criteria provided, single submitter | clinical testing | This missense variant replaces isoleucine with threonine at codon 66 of the APC protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with APC-related disorders in the literature. This variant has not been identified in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. |
| Baylor Genetics | RCV002537060 | SCV004202647 | uncertain significance | Familial adenomatous polyposis 1 | 2023-08-09 | criteria provided, single submitter | clinical testing |