379D

THE STRUCTURAL BASIS OF HAMMERHEAD RIBOZYME SELF-CLEAVAGE

Summary for 379D

• Entry DOI: 10.2210/pdb379d/pdb
• Descriptor: RNA (5'-R(*GP*UP*GP*GP*UP*CP*UP*GP*AP*UP*GP*AP*GP*GP*CP*C)-3'), RNA (5'-R(*GP*GP*CP*CP*GP*AP*AP*AP*CP*UP*CP*GP*UP*AP*AP*GP*A P*GP*UP*CP*AP*CP*CP*AP*C)-3'), COBALT (II) ION (3 entities in total)
• Functional Keywords: rna hammerhead ribozyme, catalytic rna, loop, ribozyme
• Total number of polymer chains: 2
• Total formula weight: 13661.44

Authors

Murray, J.B.,Terwey, D.P.,Maloney, L.,Karpeisky, A.,Usman, N.,Beigelman, L.,Scott, W.G. (deposition date: 1998-02-05, release date: 1998-02-11, Last modification date: 2024-04-03)

Primary citation

Murray, J.B.,Terwey, D.P.,Maloney, L.,Karpeisky, A.,Usman, N.,Beigelman, L.,Scott, W.G.
The structural basis of hammerhead ribozyme self-cleavage.
Cell(Cambridge,Mass.), 92:665-673, 1998

PubMed Abstract: We have captured an 8.7 A conformational change that takes place in the cleavage site of the hammerhead ribozyme during self-cleavage, using X-ray crystallography combined with physical and chemical trapping techniques. This rearrangement brings the hammerhead ribozyme from the ground state into a conformation that is poised to form the transition state geometry required for hammerhead RNA self-cleavage. Use of a 5'-C-methylated ribose adjacent to the cleavage site permits this ordinarily transient conformational change to be kinetically trapped and observed crystallographically after initiating the hammerhead ribozyme reaction in the crystal. Cleavage of the corresponding unmodified hammerhead ribozyme in the crystal under otherwise identical conditions is faster than in solution, indicating that we have indeed trapped a catalytically relevant intermediate form of this RNA enzyme.

PubMed: 9506521
DOI: 10.1016/S0092-8674(00)81134-4

Experimental method

X-RAY DIFFRACTION (3.1 Å)