Total submissions: 3
| Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
|---|---|---|---|---|---|---|---|---|
| Ambry Genetics | RCV001018112 | SCV001179299 | uncertain significance | Hereditary cancer-predisposing syndrome | 2024-01-19 | criteria provided, single submitter | clinical testing | The p.T288R variant (also known as c.863C>G), located in coding exon 10 of the MLH1 gene, results from a C to G substitution at nucleotide position 863. The threonine at codon 288 is replaced by arginine, 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 deleterious by in silico analysis. Based on the available evidence, the clinical significance of this alteration remains unclear. |
| Invitae | RCV001210387 | SCV001381872 | uncertain significance | Hereditary nonpolyposis colorectal neoplasms | 2023-06-04 | criteria provided, single submitter | clinical testing | 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. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. 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 MLH1 protein function. ClinVar contains an entry for this variant (Variation ID: 822620). This variant has not been reported in the literature in individuals affected with MLH1-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces threonine, which is neutral and polar, with arginine, which is basic and polar, at codon 288 of the MLH1 protein (p.Thr288Arg). |
| All of Us Research Program, |
RCV004004573 | SCV004840916 | uncertain significance | Lynch syndrome | 2023-08-28 | criteria provided, single submitter | clinical testing | This missense variant replaces threonine with arginine at codon 288 of the MLH1 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 MLH1-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. |