Trex1

Trex1 the protein is involved in DNA damage response. Tyrannosaurus rex (T. rex) the dinosaur lived during the Cretaceous Period. Raptor the protein is a regulator of mTOR activity. Velociraptors the dinosaurs lived during the Cretaceous Period. Learn more about Trex1 and Raptor proteins as well as some fun facts about the tyrannosaurus rex and the velociraptor in our infographic below.

This gene encodes the major 3' to 5' DNA exonuclease in human cells. The protein is a non-processive exonuclease that appears to provide proofreading for checkpoint signaling after DNA damage in response to oxidative stress and apoptosis. It is ubiquitously expressed. Trex1 binds to single-stranded DNA coated with replication protein A found at sites of DNA damage, and recruits the ataxia telangiectasia and Rad3 related protein (ATR) checkpoint kinase.