2aqb | pdb_00002aqb

Structure-activity relationships at the 5-position of thiolactomycin: an intact 5(R)-isoprene unit is required for activity against the condensing enzymes from Mycobacterium tuberculosis and Escherchia coli

spinqualitylabelsall models 2aqb, resolution 2.19Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2aqb is a 4 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: TL6 Related: 1fj4, 2aq7 Gene: fabB, fabC (Escherichia coli) Activity: Beta-ketoacyl-acyl-carrier-protein synthase I, with EC number 2.3.1.41 Resources: FirstGlance, OCA, RCSB, PDBsum Function [FABB_ECOLI] Catalyzes the condensation reaction of fatty acid synthesis by the addition to an acyl acceptor of two carbons from malonyl-ACP. Specific for elongation from C-10 to unsaturated C-16 and C-18 fatty acids. 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 Thiolactomycin inhibits bacterial cell growth through inhibition of the beta-ketoacyl-ACP synthase activity of type II fatty acid synthases. The effect of modifications of the 5-position isoprenoid side chain on both IC(50) and MIC were determined. Synthesis and screening of a structurally diverse set of 5-position analogues revealed very little tolerance for substitution in purified enzyme assays, but a few analogues retained MIC, presumably through another target. Even subtle modifications such as reducing one or both double bonds of the diene were not tolerated. The only permissible structural modifications were removal of the isoprene methyl group or addition of a methyl group to the terminus. Cocrystallization of these two inhibitors with the condensing enzyme from Escherichia coli revealed that they retained the TLM binding mode at the active site with reduced affinity. These results suggest a strict requirement for a conjugated, planar side chain inserting within the condensing enzyme active site. Structure-activity relationships at the 5-position of thiolactomycin: an intact (5R)-isoprene unit is required for activity against the condensing enzymes from Mycobacterium tuberculosis and Escherichia coli.,Kim P, Zhang YM, Shenoy G, Nguyen QA, Boshoff HI, Manjunatha UH, Goodwin MB, Lonsdale J, Price AC, Miller DJ, Duncan K, White SW, Rock CO, Barry CE 3rd, Dowd CS J Med Chem. 2006 Jan 12;49(1):159-71. PMID:16392800 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Acyl carrier protein synthase

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