Total submissions: 4
| Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
|---|---|---|---|---|---|---|---|---|
| Ambry Genetics | RCV000574130 | SCV000667212 | pathogenic | Hereditary cancer-predisposing syndrome | 2023-04-28 | criteria provided, single submitter | clinical testing | The p.V173E pathogenic mutation (also known as c.518T>A), located in coding exon 4 of the TP53 gene, results from a T to A substitution at nucleotide position 518. The valine at codon 173 is replaced by glutamic acid, an amino acid with dissimilar properties. This variant is in the DNA binding domain of the TP53 protein and is reported to have non-functional transactivation in yeast based assays (Kato S et al. Proc. Natl. Acad. Sci. USA. 2003 Jul;100:8424-9). Studies conducted in human cell lines indicate this alteration is deficient at growth suppression and has a dominant negative effect (Kotler E et al. Mol.Cell. 2018 Jul;71:178-190.e8; Giacomelli AO et al. Nat. Genet. 2018 Oct;50:1381-1387). This variant has been detected in at least one individual at an allele fraction that is suggestive of clonal hematopoiesis, a predictor of TP53 pathogenicity (Ambry internal data; Fortuno C et al. Genet Med. 2022 03;24:673-680). Another alteration at the same codon,p.V173M (c.517G>A), has been reported in a family meeting clinical criteria for Li-Fraumeni Syndrome (Achatz M et al. Cancer Lett. 2007 Jan; 245(1-2):96-102). The p.V173E variant is considered to be rare based on population cohorts in the Genome Aggregation Database (gnomAD). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the supporting evidence, this alteration is interpreted as a disease-causing mutation. |
| Labcorp Genetics |
RCV002524700 | SCV003226390 | uncertain significance | Li-Fraumeni syndrome | 2022-07-31 | 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. Experimental studies have shown that this missense change affects TP53 function (PMID: 12826609, 29979965, 30224644). Advanced modeling of experimental studies (such as gene expression, population dynamics, functional pathways, and cell-cycle effects in cell culture) performed at Invitae indicates that this missense variant is expected to disrupt TP53 protein function. ClinVar contains an entry for this variant (Variation ID: 376669). This variant has not been reported in the literature in individuals affected with TP53-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces valine, which is neutral and non-polar, with glutamic acid, which is acidic and polar, at codon 173 of the TP53 protein (p.Val173Glu). |
| Myriad Genetics, |
RCV004022245 | SCV004931809 | likely pathogenic | Li-Fraumeni syndrome 1 | 2024-02-14 | criteria provided, single submitter | clinical testing | This variant is considered likely pathogenic. Functional studies indicate this variant impacts protein function [PMID: 29979965]. This variant is expected to disrupt protein structure [Myriad internal data]. |
| Mayo Clinic Laboratories, |
RCV000582350 | SCV000692084 | uncertain significance | not specified | no assertion criteria provided | clinical testing |