Walter Schmidt

Walter Schmidt is a Professor and Associate Head of Department in the Department of Biochemistry and Molecular Biology at the University of Georgia, where he holds the distinguished title of Josiah Meigs Distinguished Teaching Professor and is a Georgia Cancer Coalition Scholar. His research laboratory investigates the molecular mechanisms of protein prenylation and proteolytic processing of CaaX-type proteins, with significant implications for cancer biology and therapeutic development.

Education:

• PostDoctoral Research: Johns Hopkins University School of Medicine (2001)
• PhD: University of California, Berkeley (1995)
• Undergraduate: Rice University, B.A. (1989)
• High School: Weslaco High School (1985)

Professor Schmidt's research program focuses on the post-translational modifications of CaaX proteins, which undergo an ordered series of C-terminal modifications: isoprenylation, proteolysis, and carboxylmethylation. His lab has made significant contributions to understanding the 'shunt pathway' alternative to standard modification pathways, the proteolytic mechanisms of Rce1p and Ste24p proteases, and the biological roles of M16A proteases including their relationship to insulin-degrading enzyme and Alzheimer's disease. His work bridges fundamental biochemistry with translational applications, particularly in cancer therapeutics through the National Cancer Institute's RAS Initiative. The lab employs a multidisciplinary approach combining yeast genetics, biochemical assays, structural analysis, and increasingly, bioinformatic and machine learning methodologies to characterize substrate specificities and enzymatic mechanisms.

Analysis of Professor Schmidt's recent publication record reveals a consistent and expanding research trajectory focused on protein prenylation mechanisms. His work has evolved from basic characterization of CaaX processing enzymes to sophisticated analyses of substrate scope using peptide libraries, machine learning, and humanized yeast systems. The research demonstrates increasing integration of computational approaches with experimental validation, while maintaining strong relevance to cancer biology through examination of Ras oncoproteins and related signaling pathways. Recent publications highlight the unexpected breadth of substrates for prenylating enzymes and the functional consequences of altered processing on protein localization and cellular phenotypes.

Scientific Awards and Recognition:

• 2021 Undergraduate Research Mentoring Award
• Georgia Cancer Coalition Scholar
• Josiah Meigs Distinguished Teaching Professor

Professor Schmidt maintains an active mentoring program with notable success in guiding undergraduate and graduate researchers. Several students from his laboratory have received prestigious awards including the Mary Loraine Young Hines 1968 Graduate Fellowship in Cancer Research, Hamilton Lokey Graduate Scholarship, and Hispanic Scholarship Fund awards. His research is supported by substantial extramural funding, particularly NIH R01 grants GM117148 (2016-2020) focused on 'Role of proteolysis in regulating CaaX protein function' and GM132606 (2019-2024) studying 'Determining the scope of prenylatable protein sequences.' These sustained funding streams reflect the significance of his work in understanding fundamental cellular processes with direct implications for cancer therapeutics.

Professor Schmidt leads an active research group operating from the Life Sciences Building (A416) at the University of Georgia. The Schmidt Lab utilizes a sophisticated humanized yeast system as a powerful genetic platform to investigate protein prenylation mechanisms applicable to human biology and disease. The laboratory's research directly contributes to the broader scientific understanding of Ras biology through participation in the National Cancer Institute's RAS Initiative, positioning the work at the intersection of basic science and translational cancer research.