6d4s | pdb_00006d4s

M. thermoresistible GuaB2 delta-CBS in complex with inhibitor Compound 37 (VCC670597)

spinqualitylabelsall models 6d4s, resolution 1.63Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6d4s is a 1 chain structure with sequence from Myct3. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: FWV, IMP Gene: guaB, KEK_23061 (MYCT3) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [G7CNL4_MYCT3] Catalyzes the conversion of inosine 5'-phosphate (IMP) to xanthosine 5'-phosphate (XMP), the first committed and rate-limiting step in the de novo synthesis of guanine nucleotides, and therefore plays an important role in the regulation of cell growth.[HAMAP-Rule:MF_01964] Publication Abstract from PubMed Tuberculosis (TB) is a major infectious disease associated increasingly with drug resistance. Thus, new anti-tubercular agents with novel mechanisms of action are urgently required for the treatment of drug-resistant TB. In prior work, we identified compound 1 (cyclohexyl(4-(isoquinolin-5-ylsulfonyl)piperazin-1-yl)methanone) and showed that its anti-tubercular activity is attributable to inhibition of inosine-5'-monophosphate dehydrogenase (IMPDH) in Mycobacterium tuberculosis. In the present study, we explored the structure-activity relationship around compound 1 by synthesizing and evaluating the inhibitory activity of analogues against M. tuberculosis IMPDH in biochemical and whole-cell assays. X-ray crystallography was performed to elucidate the mode of binding of selected analogues to IMPDH. We establish the importance of the cyclohexyl, piperazine and isoquinoline rings for activity, and report the identification of an analogue with IMPDH-selective activity against a mutant of M. tuberculosis that is highly resistant to compound 1. We also show that the nitrogen in urea analogues is required for anti-tubercular activity and identify benzylurea derivatives as promising inhibitors that warrant further investigation. Synthesis and Structure-Activity relationship of 1-(5-isoquinolinesulfonyl)piperazine analogues as inhibitors of Mycobacterium tuberculosis IMPDH.,Singh V, Pacitto A, Donini S, Ferraris DM, Boros S, Illyes E, Szokol B, Rizzi M, Blundell TL, Ascher DB, Pato J, Mizrahi V Eur J Med Chem. 2019 Jul 15;174:309-329. doi: 10.1016/j.ejmech.2019.04.027. Epub , 2019 Apr 15. PMID:31055147 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Inosine monophosphate dehydrogenase 3D structures

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