RNA molecules with structure-dependent functions play important roles throughout molecular biology. The broad, long-term objective of the proposed research is to better understand the structural and catalytic properties of RNA. The focus is on two ribozymes at the frontier of RNA catalytic function. One ribozyme ligates RNA and is among the fastest known RNA catalysts. The other ribozyme polymerizes RNA using the same reaction as that of protein enzymes that replicate RNA. This reaction is among the most complex reactions known to be catalyzed by RNA. The reactions and structures of these two ribozymes will be examined and enhanced with a set of molecular biology experiments that involve biochemical, engineering, and combinatorial approaches.
Specific aims are 1) to characterize and optimize the rapid folding and catalysis of the RNA ligase ribozyme, 2) to examine the tertiary structure of the ligase ribozyme, and 3) to optimize and characterize the polymerase ribozyme. These experiments will contribute to our fundamental knowledge of RNA molecular biology. They will describe and extend known limits of RNA catalytic function, lay the foundation for later studies exploring how RNA can achieve such rapid and complex function, and speak to the ability of RNA to catalyze self- replication-the central presumption of current theories of the early evolution of life. Innovations and insights from these experiments will also enable and inspire those seeking to isolate new ribozymes with efficient and complex functions, including ribozymes useful as diagnostics, therapeutics, and research tools.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
5R01GM061835-03
Application #
6525945
Study Section
Cell Development and Function Integrated Review Group (CDF)
Program Officer
Greenberg, Judith H
Project Start
2000-08-01
Project End
2004-07-31
Budget Start
2002-08-01
Budget End
2003-07-31
Support Year
3
Fiscal Year
2002
Total Cost
$279,000
Indirect Cost
Name
Whitehead Institute for Biomedical Research
Department
Type
DUNS #
076580745
City
Cambridge
State
MA
Country
United States
Zip Code
02142
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