Abstract

The long-term goal of this research is to understand how centrosomes in animal cells nucleate microtubules and how this nucleating activity is regulated by cell-cycle and developmental processes. The protein complex to be used in this study is the recently identified gamma-tubulin ring complex (gamma-TuRC) which can nucleate and bind to the minus ends of tits nucleated microtubules in vitro. Based on a number of lines of evidence it is hypothesized that the gamma-TuRC is the major microtubule nucleator at the centrosomes. The gamma-TuRC consists of gamma tubulin and at least five currently unidentified proteins (p183, p151, p98, p82 and p75s). The four aims of this proposal are to: 1) clone and biochemically characterize the currently unknown proteins in the gamma-TuRC; 2) elucidate the structural organization of gamma-TuRC; 3)reconstitute functional gamma TuRC in vitro; and 4)determine the detailed functions of the gamma-TuRC.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
1R01GM056312-01
Application #
2383451
Study Section
Biological Sciences 2 (BIOL)
Project Start
1997-09-30
Project End
2002-08-31
Budget Start
1997-09-30
Budget End
1998-08-31
Support Year
1
Fiscal Year
1997
Total Cost
Indirect Cost

  Institution

Name
Carnegie Institution of Washington, D.C.
Department
Type
DUNS #
072641707
City
Washington
State
DC
Country
United States
Zip Code
20005

  Publications

Huang, Yuejia; Li, Teng; Ems-McClung, Stephanie C et al. (2018) Aurora A activation in mitosis promoted by BuGZ. J Cell Biol 217:107-116
Zheng, Xiaobin; Hu, Jiabiao; Yue, Sibiao et al. (2018) Lamins Organize the Global Three-Dimensional Genome from the Nuclear Periphery. Mol Cell 71:802-815.e7
Gigante, Crystal M; Dibattista, Michele; Dong, Frederick N et al. (2017) Lamin B1 is required for mature neuron-specific gene expression during olfactory sensory neuron differentiation. Nat Commun 8:15098
Chen, Haiyang; Zheng, Xiaobin; Xiao, Danqing et al. (2016) Age-associated de-repression of retrotransposons in the Drosophila fat body, its potential cause and consequence. Aging Cell 15:542-52
Tran, Joseph R; Zheng, Xiaobin; Zheng, Yixian (2016) Lamin-B1 contributes to the proper timing of epicardial cell migration and function during embryonic heart development. Mol Biol Cell 27:3956-3963
Tran, Joseph R; Chen, Haiyang; Zheng, Xiaobin et al. (2016) Lamin in inflammation and aging. Curr Opin Cell Biol 40:124-130
Jiang, Hao; He, Xiaonan; Feng, Di et al. (2015) RanGTP aids anaphase entry through Ubr5-mediated protein turnover. J Cell Biol 211:7-18
Zheng, Xiaobin; Yue, Sibiao; Chen, Haiyang et al. (2015) Low-Cell-Number Epigenome Profiling Aids the Study of Lens Aging and Hematopoiesis. Cell Rep 13:1505-1518
Guo, Yuxuan; Zheng, Yixian (2015) Lamins position the nuclear pores and centrosomes by modulating dynein. Mol Biol Cell 26:3379-89
Zheng, Xiaobin; Kim, Youngjo; Zheng, Yixian (2015) Identification of lamin B-regulated chromatin regions based on chromatin landscapes. Mol Biol Cell 26:2685-97

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