UT San Antonio
UT Health San Antonio

Shaun K. Olsen, PhD

Professor

Department of Biochemistry & Structural Biology

Currently seeking Ph.D. students

The Olsen lab investigates the molecular mechanisms of ubiquitin and ubiquitin-like protein signaling and DNA repair.  The lab studies how E1, E2, and E3 enzymes cooperate to attach ubiquitin and related modifiers, including SUMO, ISG15, and FAT10, to cellular proteins. A central goal is to understand how these enzymes achieve specificity and how their activities might be targeted therapeutically.  In DNA repair, the lab investigates how RAD51 paralog complexes assemble and regulate RAD51 filaments during homologous recombination, helping to maintain genome stability.  The team combines cryo-electron microscopy, X-ray crystallography, enzymology, biochemistry, and cell-based assays to connect molecular mechanisms with cellular function. Collaborations with the Center for Innovative Drug Discovery explore small-molecule inhibitors and targeted protein degraders.