379d | pdb_0000379d

THE STRUCTURAL BASIS OF HAMMERHEAD RIBOZYME SELF-CLEAVAGE

spinqualitylabelsall models 379d, resolution 3.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 379d is a 2 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CO Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed 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. The structural basis of hammerhead ribozyme self-cleavage.,Murray JB, Terwey DP, Maloney L, Karpeisky A, Usman N, Beigelman L, Scott WG Cell. 1998 Mar 6;92(5):665-73. PMID:9506521 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ribozyme

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