Total submissions: 4
| Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
|---|---|---|---|---|---|---|---|---|
| Ambry Genetics | RCV001014496 | SCV001175210 | uncertain significance | Hereditary cancer-predisposing syndrome | 2023-04-18 | criteria provided, single submitter | clinical testing | The p.Y721S variant (also known as c.2162A>C), located in coding exon 19 of the MLH1 gene, results from an A to C substitution at nucleotide position 2162. The tyrosine at codon 721 is replaced by serine, an amino acid with dissimilar properties. This amino acid position is well 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. |
| Invitae | RCV001065739 | SCV001230714 | uncertain significance | Hereditary nonpolyposis colorectal neoplasms | 2023-09-03 | criteria provided, single submitter | clinical testing | This sequence change replaces tyrosine, which is neutral and polar, with serine, which is neutral and polar, at codon 721 of the MLH1 protein (p.Tyr721Ser). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with MLH1-related conditions. ClinVar contains an entry for this variant (Variation ID: 820740). 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) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on MLH1 protein function. 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. |
| Baylor Genetics | RCV003461339 | SCV004195102 | uncertain significance | Colorectal cancer, hereditary nonpolyposis, type 2 | 2023-09-21 | criteria provided, single submitter | clinical testing | |
| Color Diagnostics, |
RCV001014496 | SCV004359278 | uncertain significance | Hereditary cancer-predisposing syndrome | 2022-03-03 | criteria provided, single submitter | clinical testing | This missense variant replaces tyrosine with serine at codon 721 of the MLH1 protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 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. |