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Return to: College of Biological Sciences: Medical School: U of M Home |
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Areas of Research Strength: Cell biology, with emphasis on regulation of organelle biogenesis Membrane structure and dynamics Sterol metabolism Protein targeting and localization Genetic and genomic approaches to organelle biogenesis Microscopic analysis of cell structure Undergraduate education back to top |
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Research Techniques: Microscopy, including electron microscopy Classical genetics Molecular genetics Genomics Biochemical analyses Assessment strategies for undergraduate classes back to top |
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Research Interests: The story of life on Earth is likely to be a story of cold. The first organic molecules and cells may have arisen on Earth in icy conditions, providing an evolutionary “cold start” to life. As recently as 500 million years ago, all life has had to survive through global glaciations. Even today, Earth’s biosphere is largely cold, with as much as 80% having an average temperature of less than 5oC. Clearly, understanding how organisms adapt to cold temperature is important for a variety of disciplines, from the evolution of life to the ecology of arctic environments to cellular biology and physiology. However, surprisingly large gaps exist in our exploration of the biology of cold adaptation. Most notably, investigations of cold adaptation are nearly non-existent in fungi, one of the five classical kingdoms of life. In addition, the roles of sterol metabolism in cold adaptation in any organism are similarly unexplored. Current research in my lab focuses on laying the foundations for deep exploration of the genetics, molecular and cellular biology, and physiology of cold adaptation in yeast, a unicellular fungus. It is likely that results of these studies will have relevance to other fungi, and perhaps to other kingdoms of life. In a search for genes required for ER biogenesis in the yeast Saccharomyces cerevisiae, the Wright lab discovered that mutations in a subset of genes involved in ER-associated degradation (ERAD) result in cold sensitivity. In collaboration with co-PI Martin Bard (IUPUI), they also discovered that these genes are required for proper regulation of sterol metabolism. These observations lead to the foundational hypothesis that they explore: ERAD regulates key aspects of sterol metabolism in yeast and this regulation is required for cold adaptation. To test this hypothesis, they use genetic, biochemical, and cell biological approaches to determine both the molecular mechanisms by which ERAD regulates sterol metabolism and also whether this regulation underlies the role of ERAD itself in cold adaptation. To examine the ecological and evolutionary relevance of sterol metabolism in cold adaptation, experiments in S. cerevisiae will be coordinated with analyses of sterols in psychrophilic yeast species isolated in Antarctic environments. In addition, the genes in S. cerevisiae that are necessary for cold adaptation have been identified using global genetic screens and are being analyzed using genomics approaches. The results of these studies will provide specific insights into the role of sterol metabolism and ERAD in cold adaptation, as well as create a framework for long-term investigations of cold adaptation in yeast. Education Interests
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Selected Publications: Parrish, M., E. Cadera, L. Larson, C. Cho, P. Garrett-Engele, C. Armour, P.Y. Lum, D. D. Shoemaker, and R. Wright. 2003. Parallel analysis of tagged deletion mutants efficiently identifies genes involved in endoplasmic reticulum biogenesis. Yeast (in press). Larson, L.L., M.L. Parrish, A.J. Koning, and R. Wright. 2002. Proliferation of the endoplasmic reticulum occurs normally in cells that lack a functional unfolded protein response. Yeast 19:373-393. Koning, A.J., L.L. Larson, E. J. Cadera, M.L. Parrish, and R. Wright. 2002. Mutations that affect vacuole biogenesis inhibit proliferation of the endoplasmic reticulum in Saccharomyces cerevisiae. Genetics 160:1335-1352. Profant, D., C. Roberts, and R. Wright. 2000. Mutational analysis of the karmellae-inducing signal in Hmg1p, a yeast HMG-CoA reductase isozyme. Yeast 16:811-827. Profant, D. A., C. J. Roberts, A. J. Koning, and R. Wright. 1999. The role of the HMG-CoA reductase cytosolic domain in karmellae biogenesis. Mol. Biol. Cell 10:3409-3423. Articles about Teaching Wright, R. 2006. “Dear Abbot” article on teaching mitosis and meiosis, in Genetics Newsletter. Robin L. Wright, Aaron Charlson, and Carrie F. Olson Robin L. Wright Wright, R. and J. Boggs. 2002. Learning cell biology as a team: a project-based approach to upper-division cell biology. Cell Biology Education 1:145-153. Wright, R. 2001. The Art of Teaching, Session 1: Reading the Audience. Science’s Next Wave. Wright, R. 2001. The Art of Teaching, Session 2: Using portfolios to improve and evaluate teaching. Science’s Next Wave. To view these and other publications visit http://www.ncbi.nlm.nih.gov/PubMed search menu should say PubMed type Wright R in the avaliable line. Note: There are serveral people who use "Wright R" back to top |
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