With a PhD in theoretical physics and over twenty years experience in experimental biological research, it is not surprising that my current research is in computational biology, focused on the quantitative analysis of experimental data in biochemistry and cell biology. Similarly, I am particularly interested in the training of both our undergraduate and graduate biology students at the interface between biology, mathematics, physics and computation.
Our research focuses on the role of aberrant splicing of the Receptor Protein Tyrosine Phosphatase alpha (RPTPalpha) proto-oncoprotein in cancer. Our previous experimental studies with a limited number of patients showed that PTPalpha is aberrantly spliced in large fractions of breast and colon cancers and that it can induce cancer by "dominant-positive" activity. We are now computationally investigating much larger numbers of patients and additional tumor types by analyzing high-throughput RNA sequence data from human tumors. In experimental studies, we are investigating the mechanism of alternative splicing and whether known cancer-associated mutations are acting via the dominant positive mechanism.
Additional projects in computational biology include
1) Development of a new statistical method for improved analysis of high-throughput RNAaptamer-target binding data (i.e., HitsRap data). This new experimental technique can facilitate the rapid identification of high-affinity ligands, but requires the new type of analysis that we are developing for maximum advantage. (Collaboration with John Lis, Dept. of MBG).
3) Cell replication and motility in the epidermis and hair follicle. These systems provide models of organ development that can be studied in detail using transgenic mice in which the replication and motility of individual cells can be followed using fluorescent tracers. We use mathematical modeling to infer the underlying biological processes involved. (Collaboration with Doina Tumbar, Dept. of MBG.)
4) Improved methods of pattern recognition in multidimensional large database analysis. Even the identification of patterns in a two-dimensional field (e.g., in vision) is computationally challenging, and the many-dimensional problem posed by large-scale bio-databases is even more difficult. We are developing a novel approach using advanced methods from stochastic statistical physics.
BioMG 838: Scientific Communication in Biochemistry, Molecular and Cell Biology- students are coached in preparing a grant proposal, presenting a scientific talk, and writing scientific papers
My focus is on training students in the skill of written and oral scientific communication and on the application of mathematics, statistics and computation to experimental biological problems.
- Corrales, L. R., Yi, T. D., Trumbo, S. K., Shalloway, D. I., Lunine, J. I., & Usher, D. A. (2017). Acetonitrile cluster solvation in a cryogenic ethane-methane-propane liquid: implications for Titan lake chemistry. Journal of Chemical Physics. 146:104308.
- Filter, J. J., Williams, B. C., Eto, M., Shalloway, D. I., & Goldberg, M. L. (2017). Unfair competition governs the interaction of pCPI-17 with myosin phosphatase (PP1-MYPT1). eLife. 6:e24665.
- Rahm, M., Lunine, J., Usher, D. A., & Shalloway, D. I. (2016). Polymorphism and electronic structure of polyimine and its potential significance for prebiotic chemistry on Titan. Proceedings of the National Academy of Sciences of the United States of America. 113:8121-8126.
- Sada, A., Jacob, F., Leung, E., Wang, S., White, B. S., Shalloway, D. I., & Tumbar, T. (2016). Defining the cellular lineage hierarchy in adult skin epidermis. Nature Cell Biology. 18:619-631.
- Williams, B. C., Filter, J. J., Blake-Hodek, K. A., Wadzinski, B. E., Fuda, N. J., Shalloway, D. I., & Goldberg, M. L. (2014). Greatwall-phosphorylated endosulfine is both an inhibitor and a substrate of PP2A-B55 heterotrimers. eLife. 3:e01695.
- Shalloway, D. I. (2014). The evidentiary credible region. Bayesian Analysis. 9:909-922.
- Ozer, A., White, B. S., Lis, J. T., & Shalloway, D. I. (2013). Density-dependent cooperative non-specific binding in solid-phase SELEX affinity selection. Nucleic Acids Research. 41:7167-7175.
- Lee, J., Hoi, C. S., Lilja, K. C., White, B., Lee, S. E., Shalloway, D. I., & Tumbar, T. (2013). Runx1 and p21 synergistically limit the extent of hair follicle stem cell quiescence in vivo. Proceedings of the National Academy of Sciences of the United States of America. 110:4634-4639.
- Huang, J., Yao, L., Xu, R., Wu, J., Wang, M., White, B. S., Shalloway, D. I., & Zheng, X. (2011). Activation of Src and transformation by a RPTPalpha splice mutant found in human tumors. EMBO Journal. 30:3200-3211.
- Tremper-Wells, B., Resnick, R. J., Zheng, X., Holsinger, L. J., & Shalloway, D. I. (2010). Extracellular domain dependence of PTPalpha transforming activity. Genes to Cells. 15:711-724.