Total submissions: 2
Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
---|---|---|---|---|---|---|---|---|
Gene |
RCV000482514 | SCV000570231 | uncertain significance | not provided | 2016-05-25 | criteria provided, single submitter | clinical testing | This variant is denoted POLD1 c.1135C>T at the cDNA level and p.Gln379Ter (Q379X) at the protein level. The substitution creates a nonsense variant, which changes a Glutamine to a premature stop codon (CAG>TAG), and is predicted to result in protein truncation or nonsense-mediated mRNA decay. This variant has not, to our knowledge, been published in the literature. While some missense variants in POLD1 have been recognized as an underlying cause of Polymerase Proofreading-Associated Polyposis (PPAP), there are no data at this time to support that loss-of-function variants confer the same cancer risks. We therefore consider POLD1 Gln379Ter to be a variant of uncertain significance with respect to cancer. |
Invitae | RCV000700497 | SCV000829254 | uncertain significance | Colorectal cancer, susceptibility to, 10 | 2022-07-06 | 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. ClinVar contains an entry for this variant (Variation ID: 421125). This variant has not been reported in the literature in individuals affected with POLD1-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Gln379*) in the POLD1 gene. Missense variants that disrupt the 3'-5' exonuclease (proof-reading) activity of the POLD1 protein are associated with an increased risk for colonic adenomatous polyps and colon cancer (PMID: 23263490, 23447401). However, loss-of-function variants that result in an absent or severely disrupted POLD1 protein, and missense variants outside the exonuclease domain, are unlikely to be associated with polyposis or colon cancer. |