3fri

Structure of the 16S rRNA methylase RmtB, I222

spinqualitylabelsall models 3fri, resolution 1.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3fri is a 1 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.8Å Ligands: SAH Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q763K9_ECOLX Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Aminoglycosides are used extensively for the treatment of severe infections due to Gram-negative bacteria. However, certain species have become highly resistant after acquisition of genes for methyltransferases which catalyze post-transcriptional methylation of N7-G1405 in 16 S rRNA of 30 S ribosomal subunits. Inactivation of this enzymatic activity is therefore an important challenge for development of an effective therapy. The present work describes the crystallographic structures of methyltransferases RmtB and ArmA from clinical isolates. Together with biochemical experiments, the 3D structures indicate that the N-terminal domain specific for this family of methyltransferases is required for enzymatic activity. Site-directed mutagenesis has enabled important residues for catalysis and RNA binding to be identified. These high-resolution structures should underpin the design of potential inhibitors of these enzymes, which could be used to restore the activity of aminoglycosides against resistant pathogens. Structural bases for 16 S rRNA methylation catalyzed by ArmA and RmtB methyltransferases.,Schmitt E, Galimand M, Panvert M, Courvalin P, Mechulam Y J Mol Biol. 2009 May 8;388(3):570-82. Epub 2009 Mar 20. PMID:19303884 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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