Total submissions: 3
| Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
|---|---|---|---|---|---|---|---|---|
| Invitae | RCV003534675 | SCV000828014 | uncertain significance | Familial adenomatous polyposis 1 | 2023-12-25 | criteria provided, single submitter | clinical testing | This sequence change replaces serine, which is neutral and polar, with phenylalanine, which is neutral and non-polar, at codon 521 of the APC protein (p.Ser521Phe). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with APC-related conditions. ClinVar contains an entry for this variant (Variation ID: 576742). 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. |
| Color Diagnostics, |
RCV000772565 | SCV000905745 | uncertain significance | Hereditary cancer-predisposing syndrome | 2020-03-10 | criteria provided, single submitter | clinical testing | This missense variant replaces serine with phenylalanine at codon 521 of the APC protein. Computational prediction is inconclusive regarding the impact of this variant on protein structure and function (internally defined REVEL score threshold 0.5 < inconclusive < 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with hereditary cancer 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. |
| Ambry Genetics | RCV000772565 | SCV002707140 | uncertain significance | Hereditary cancer-predisposing syndrome | 2023-03-29 | criteria provided, single submitter | clinical testing | The p.S521F variant (also known as c.1562C>T), located in coding exon 12 of the APC gene, results from a C to T substitution at nucleotide position 1562. The serine at codon 521 is replaced by phenylalanine, an amino acid with highly dissimilar properties. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. |