2v57

Crystal structure of the TetR-like transcriptional regulator LfrR from Mycobacterium smegmatis in complex with proflavine

spinqualitylabelsall models 2v57, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2v57 is a 4 chain structure with sequence from Mycolicibacterium smegmatis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.9Å Ligands: IPA, PRL, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q58L87_MYCSM 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 TetR-like transcriptional repressor LfrR controls the expression of the gene encoding the Mycobacterium smegmatis efflux pump LfrA, which actively extrudes fluoroquinolones, cationic dyes, and anthracyclines from the cell and promotes intrinsic antibiotic resistance. The crystal structure of the apoprotein form of the repressor reveals a structurally asymmetric homodimer exhibiting local unfolding and a blocked drug-binding site, emphasizing the significant conformational plasticity of the protein necessary for DNA and multidrug recognition. Crystallographic and calorimetric studies of LfrR-drug complexes further confirm the intrinsic flexibility of the homodimer, which provides a dynamic mechanism to broaden multidrug binding specificity and may be a general property of transcriptional repressors regulating microbial efflux pump expression. Structural plasticity and distinct drug-binding modes of LfrR, a mycobacterial efflux pump regulator.,Bellinzoni M, Buroni S, Schaeffer F, Riccardi G, De Rossi E, Alzari PM J Bacteriol. 2009 Dec;191(24):7531-7. Epub 2009 Oct 9. PMID:19820093 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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