The goal of this proposal is to develop specific, rapid and reversible small-molecule kinase activators to probe specific nodes in kinase signaling. The studies proposed here lay the foundation for the development of a new technique for local activation and characterization of complex cell signaling cascades. Currently, we do not a have systematic mean to rapidly activate and detect responses mediated by individual protein kinases. The development of small-molecule dependent split-kinases could elucidate the dynamic nature of signaling pathways, independent of extrinsic signals, providing a roadmap of specific activation pathways that are dependent on levels of kinase activity. In theory, this strategy could be rapidly implemented for dissecting and probing essentially any protein kinase, based on the high degree of homology within kinase families. Inducible split-kinase constructs will provide a powerful method to study individual protein kinases without the need to design specific inhibitors to each kinase of interest. The studies proposed here will provide a tractable method for increasing the threshold of kinase activity in a selective, rapid and tunable manner to address questions relating kinase function with activation levels.

Public Health Relevance

These global phosphorylation studies will reveal the dynamic nature of signaling pathways and follow how these signals change over time as a function of kinase activity. Small-molecule activation of split-kinases will enable the pharmacological value of a kinase to be examined by circumventing extracellular activation of signaling pathways and potentially discovering new physiologically relevant targets for treating diseases.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Postdoctoral Individual National Research Service Award (F32)
Project #
5F32GM089082-02
Application #
7923992
Study Section
Special Emphasis Panel (ZRG1-F04B-L (20))
Program Officer
Fabian, Miles
Project Start
2009-08-01
Project End
2012-07-31
Budget Start
2010-08-01
Budget End
2011-07-31
Support Year
2
Fiscal Year
2010
Total Cost
$50,474
Indirect Cost
Name
University of California San Francisco
Department
Pharmacology
Type
Schools of Pharmacy
DUNS #
094878337
City
San Francisco
State
CA
Country
United States
Zip Code
94143
Diaz, Juan E; Morgan, Charles W; Minogue, Catherine E et al. (2017) A Split-Abl Kinase for Direct Activation in Cells. Cell Chem Biol 24:1250-1258.e4