The protein tubulin plays a vital role in the life of all eukaryotic cells. Microtubules, made mostly of tubulin, are involved in organelle movement, separation of chromosomes during cell division, maintenance of cell shape and other critical cellular activities. The assembly and disassembly of microtubules at particular times are essential steps in the cell cycle. These processes are closely regulated, and interference with the regulatory mechanisms can lead to cell death. These properties have made tubulin both a fascinating specimen for biophysical studies and a useful target for anti-cancer drugs. It is important to understand how tubulin molecules interact with each other as well as with large number of other proteins and ligands in these activities in order to have a full understanding of the life of the cell, and as a first step in this direction we have determined the structure of tubulin and microtubules by electron crystallography and cryo-EM. In the proposed work we will extend our understanding of the structure and learn more about the processes that give tubulin its unique properties. We will study the interaction of tubulin with drugs that stabilize microtubules and the interactions with some of the proteins that bind to microtubules and that utilize and regulate the microtubule cytoskeleton. This work will lead to a rational understanding of the functional mechanisms of microtubule dynamics and may reveal several distinct underlying mechanism of microtubule stabilization, eventually allowing development of new, more effective drugs targeted to tubulin.
Our structural studies of tubulin and the microtubules it forms are aimed at understanding how proteins and small ligands interact in regulating processes within cells. This information will expand our knowledge of basic cell biology and enhance opportunities to address diseases including cancer and Parkinson's Disease..
| Sazzed, Salim; Song, Junha; Kovacs, Julio A et al. (2018) Tracing Actin Filament Bundles in Three-Dimensional Electron Tomography Density Maps of Hair Cell Stereocilia. Molecules 23: |
| Kamennaya, Nina A; Zemla, Marcin; Mahoney, Laura et al. (2018) High pCO2-induced exopolysaccharide-rich ballasted aggregates of planktonic cyanobacteria could explain Paleoproterozoic carbon burial. Nat Commun 9:2116 |
| Howes, Stuart C; Geyer, Elisabeth A; LaFrance, Benjamin et al. (2018) Structural and functional differences between porcine brain and budding yeast microtubules. Cell Cycle 17:278-287 |
| Glaeser, Robert M (2018) PROTEINS, INTERFACES, AND CRYO-EM GRIDS. Curr Opin Colloid Interface Sci 34:1-8 |
| Kellogg, Elizabeth H; Hejab, Nisreen M A; Poepsel, Simon et al. (2018) Near-atomic model of microtubule-tau interactions. Science 360:1242-1246 |
| Zhang, Rui; LaFrance, Benjamin; Nogales, Eva (2018) Separating the effects of nucleotide and EB binding on microtubule structure. Proc Natl Acad Sci U S A 115:E6191-E6200 |
| Nogales, Eva (2018) Cytoskeleton in high resolution. Nat Rev Mol Cell Biol 19:142 |
| Downing, Kenneth H; Glaeser, Robert M (2018) Estimating the effect of finite depth of field in single-particle cryo-EM. Ultramicroscopy 184:94-99 |
| Nogales, Eva (2018) Cryo-EM. Curr Biol 28:R1127-R1128 |
| Han, Bong-Gyoon; Watson, Zoe; Cate, Jamie H D et al. (2017) Monolayer-crystal streptavidin support films provide an internal standard of cryo-EM image quality. J Struct Biol 200:307-313 |
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