1uth

DntR from Burkholderia sp. strain DNT in complex with Thiocyanate

spinqualitylabelsall models 1uth, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1uth is a 2 chain structure with sequence from Burkholderia sp. dnt. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: SCN Related: 1utb Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT 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 The transcriptional regulator DntR, a member of the LysR family, is a central element in a prototype bacterial cell-based biosensor for the detection of hazardous contamination of soil and groundwater by dinitrotoluenes. To optimise the sensitivity of the biosensor for such compounds we have chosen a rational design of the inducer-binding cavity based on knowledge of the three-dimensional structure of DntR. We report two crystal structures of DntR with acetate (resolution 2.6 angstroms) and thiocyanate (resolution 2.3 angstroms), respectively, occupying the inducer-binding cavity. These structures allow for the construction of models of DntR in complex with salicylate (Kd approximately or = 4 microM) and 2,4-dinitrotoluene that provide a basis for the design of mutant DntR with enhanced specificity for dinitrotoluenes. In both crystal structures DntR crystallises as a homodimer with a "head-to-tail" arrangement of monomers in the asymmetric unit. Analysis of the crystal structure has allowed the building of a full-length model of DntR in its biologically active homotetrameric form consisting of two "head-to-head" dimers. The implications of this model for the mechanism of transcription regulation by LysR proteins are discussed. Development of a bacterial biosensor for nitrotoluenes: the crystal structure of the transcriptional regulator DntR.,Smirnova IA, Dian C, Leonard GA, McSweeney S, Birse D, Brzezinski P J Mol Biol. 2004 Jul 9;340(3):405-18. PMID:15210343 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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