1mme

THE CRYSTAL STRUCTURE OF AN ALL-RNA HAMMERHEAD RIBOZYME: A PROPOSED MECHANISM FOR RNA CATALYTIC CLEAVAGETHE CRYSTAL STRUCTURE OF AN ALL-RNA HAMMERHEAD RIBOZYME: A PROPOSED MECHANISM FOR RNA CATALYTIC CLEAVAGE

Structural highlights 1mme is a 4 chain structure. The May 2005 RCSB PDB Molecule of the Month feature on Self-splicing RNA by David S. Goodsell is 10.2210/rcsb_pdb/mom_2005_5. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed We have solved the crystal structure of an all-RNA hammerhead ribozyme having a single 2'-O-methyl cytosine incorporated at the active site to prevent cleavage. The conditions used differ from those in another recent solution in four significant ways: first, it is an all-RNA ribozyme rather than a DNA-RNA hybrid; second, the connectivity of the ribozyme backbone strands is different; third, the crystals were grown in the presence of a much lower concentration of salt; and fourth, the crystal packing scheme is very different. Nevertheless, the three-dimensional structure of the all-RNA hammerhead ribozyme is similar to the previous structure. Five potential Mg(II)-binding sites are identified, including one positioned near the ribozyme catalytic pocket. Upon this basis, as well as upon comparisons with the metal-binding sites in the structurally homologous uridine turn of tRNAPhe, we propose a mechanism for RNA catalytic cleavage. The crystal structure of an all-RNA hammerhead ribozyme: a proposed mechanism for RNA catalytic cleavage.,Scott WG, Finch JT, Klug A Cell. 1995 Jun 30;81(7):991-1002. PMID:7541315 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ribozyme 3D structures

spinqualitylabelsall models 1mme, resolution 3.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image