2l5z | pdb_00002l5z

NMR structure of the A730 loop of the Neurospora VS ribozyme

spinqualitylabelsall models 2l5z, 21 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2l5z is a 1 chain structure. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed The Neurospora VS ribozyme is a small nucleolytic ribozyme with unique primary, secondary and global tertiary structures, which displays mechanistic similarities to the hairpin ribozyme. Here, we determined the high-resolution NMR structure of a stem-loop VI fragment containing the A730 internal loop, which forms part of the active site. In the presence of magnesium ions, the A730 loop adopts a structure that is consistent with existing biochemical data and most likely reflects its conformation in the VS ribozyme prior to docking with the cleavage site internal loop. Interestingly, the A730 loop adopts an S-turn motif that is also present in loop B within the hairpin ribozyme active site. The S-turn appears necessary to expose the Watson-Crick edge of a catalytically important residue (A756) so that it can fulfill its role in catalysis. The A730 loop and the cleavage site loop of the VS ribozyme display structural similarities to internal loops found in the active site of the hairpin ribozyme. These similarities provided a rationale to build a model of the VS ribozyme active site based on the crystal structure of the hairpin ribozyme. NMR structure of the A730 loop of the Neurospora VS ribozyme: insights into the formation of the active site.,Desjardins G, Bonneau E, Girard N, Boisbouvier J, Legault P Nucleic Acids Res. 2011 Jan 25. PMID:21266483 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ribozyme

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