Total submissions: 4
| Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
|---|---|---|---|---|---|---|---|---|
| Labcorp Genetics |
RCV004561940 | SCV000944905 | uncertain significance | Familial adenomatous polyposis 1 | 2024-07-21 | criteria provided, single submitter | clinical testing | This sequence change replaces methionine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 330 of the APC protein (p.Met330Thr). 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: 649918). 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 | RCV001019870 | SCV001181281 | uncertain significance | Hereditary cancer-predisposing syndrome | 2021-11-03 | criteria provided, single submitter | clinical testing | The p.M330T variant (also known as c.989T>C), located in coding exon 9 of the APC gene, results from a T to C substitution at nucleotide position 989. The methionine at codon 330 is replaced by threonine, an amino acid with similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, in silico predictors for this gene do not accurately predict pathogenicity. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. |
| Color Diagnostics, |
RCV001019870 | SCV001349745 | uncertain significance | Hereditary cancer-predisposing syndrome | 2019-12-31 | criteria provided, single submitter | clinical testing | This missense variant replaces methionine with threonine at codon 330 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). Splice site prediction tools suggest that this variant may not impact RNA splicing. To our knowledge, functional studies have not been performed 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. |
| Women's Health and Genetics/Laboratory Corporation of America, |
RCV002298779 | SCV002599059 | uncertain significance | not specified | 2022-09-04 | criteria provided, single submitter | clinical testing |