期刊
METHODS
卷 49, 期 2, 页码 148-166出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ymeth.2009.07.005
关键词
RNA; Ribozymes; Catalysis; Metal ion-ligand interactions; X-ray crystallography; EPR; NMR; Isotope effects; Tetrahymena group I ribozyme; RNase P; Metal ion rescue
资金
- University of Chicago Pritzker School of Medicine
- Howard Hughes Medical Institute
- NATIONAL INSTITUTE OF ALLERGY AND INFECTIOUS DISEASES [R56AI081987, R01AI081987] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [T32GM008720, R01GM088656] Funding Source: NIH RePORTER
Site-bound metal ions participate in the catalytic mechanisms of many ribozymes. Understanding these mechanisms therefore requires knowledge of the specific ligands on both substrate and ribozyme that coordinate these catalytic metal ions. A number of different structural and biochemical strategies have been developed and refined for identifying metal ion binding sites within ribozymes, and for assessing the catalytic contributions of the metal ions bound at those sites. We review these approaches and provide examples of their application, focusing in particular on metal ion rescue experiments and their roles in the construction of the transition state models for the Tetrahymena group I and RNase P ribozymes. (c) 2009 Elsevier Inc. All rights reserved.
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