5bs3 | pdb_00005bs3

Crystal Structure of S.A. gyrase in complex with Compound 7

spinqualitylabelsall models 5bs3, resolution 2.65Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5bs3 is a 4 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: MN, SO4, WCP Activity: DNA topoisomerase (ATP-hydrolyzing), with EC number 5.99.1.3 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [GYRB_STAAU] DNA gyrase negatively supercoils closed circular double-stranded DNA in an ATP-dependent manner and also catalyzes the interconversion of other topological isomers of double-stranded DNA rings, including catenanes and knotted rings.[HAMAP-Rule:MF_01898] Publication Abstract from PubMed Novel bacterial topoisomerase inhibitors (NBTIs) represent a new class of broad-spectrum antibacterial agents targeting bacterial Gyrase A and ParC and have potential utility in combating antibiotic resistance. A series of novel oxabicyclooctane-linked NBTIs with new tricyclic-1,5-naphthyridinone left hand side moieties have been described. Compounds with a (R)-hydroxy-1,5-naphthyridinone moiety (7) showed potent antibacterial activity (e.g., Staphylococcus aureus MIC 0.25mug/mL), acceptable Gram-positive and Gram-negative spectrum with rapidly bactericidal activity. The compound 7 showed intravenous and oral efficacy (ED50) at 3.2 and 27mg/kg doses, respectively, in a murine model of bacteremia. Most importantly they showed significant attenuation of functional hERG activity (IC50 >170muM). In general, lower logD attenuated hERG activity but also reduced Gram-negative activity. The co-crystal structure of a hydroxy-tricyclic NBTI bound to a DNA-gyrase complex exhibited a binding mode that show enantiomeric preference for R isomer and explains the activity and SAR. The discovery, synthesis, SAR and X-ray crystal structure of the left-hand-side tricyclic 1,5-naphthyridinone based oxabicyclooctane linked NBTIs are described. Tricyclic 1,5-naphthyridinone oxabicyclooctane-linked novel bacterial topoisomerase inhibitors as broad-spectrum antibacterial agents-SAR of left-hand-side moiety (Part-2).,Singh SB, Kaelin DE, Wu J, Miesel L, Tan CM, Black T, Nargund R, Meinke PT, Olsen DB, Lagrutta A, Lu J, Patel S, Rickert KW, Smith RF, Soisson S, Sherer E, Joyce LA, Wei C, Peng X, Wang X, Fukuda H, Kishii R, Takei M, Takano H, Shibasaki M, Yajima M, Nishimura A, Shibata T, Fukuda Y Bioorg Med Chem Lett. 2015 May 1;25(9):1831-5. doi: 10.1016/j.bmcl.2015.03.044., Epub 2015 Mar 24. PMID:25851938 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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