1l8v

Crystal Structure of a Mutant (C109G,G212C) P4-P6 Domain of the Group I Intron from Tetrahymena Thermophilia

spinqualitylabelsall models 1l8v, resolution 2.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1l8v is a 2 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.8Å Ligands: MG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Functional RNAs often form compact structures characterized by closely packed helices. Crystallographic analysis of several large RNAs revealed a prevalent interaction in which unpaired adenosine residues dock into the minor groove of a receptor helix. This A-minor motif, potentially the most important element responsible for global RNA architecture, has also been suggested to contribute to the fidelity of protein synthesis by discriminating against near-cognate tRNAs on the ribosome. The specificity of A-minor interactions is fundamental to RNA tertiary structure formation, as well as to their proposed role in translational accuracy. To investigate A-minor motif specificity, we analyzed mutations in an A-minor interaction within the Tetrahymena group I self-splicing intron. Thermodynamic and x-ray crystallographic results show that the A-minor interaction strongly prefers canonical base pairs over base mismatches in the receptor helix, enabling RNA interhelical packing through specific recognition of Watson-Crick minor groove geometry. Specificity of RNA-RNA helix recognition.,Battle DJ, Doudna JA Proc Natl Acad Sci U S A. 2002 Sep 3;99(18):11676-81. Epub 2002 Aug 20. PMID:12189204 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ribozyme 3D structures

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