9b2e
DHNA associated with an inhibitor
Structural highlights
FunctionA0A045KE67_MYCTX Catalyzes the conversion of 7,8-dihydroneopterin to 6-hydroxymethyl-7,8-dihydropterin.[RuleBase:RU362079] Publication Abstract from PubMedThe crystallographic structure of the FolB enzyme from Mycobacterium tuberculosis (MtFolB), complexed with its inhibitor 8-mercaptoguanine (8-MG), was elucidated at a resolution of 1.95 A. A novel series of S8-functionalized 8-MG derivatives were synthesised and evaluated as in vitro inhibitors of dihydroneopterin aldolase (DHNA, EC 4.1.2.25) activity of MtFolB. These compounds exhibited IC(50) values in the submicromolar range. Evaluation of the activity for five compounds indicated their inhibition mode and inhibition constants. Molecular docking analyses were performed to determine the enzyme-inhibitor intermolecular interactions and ligand conformations upon complex formation. The inhibitory activities of all compounds against the M. tuberculosis H37Rv strain were evaluated. Compound 3e exhibited a minimum inhibitory concentration in the micromolar range. Finally, Compound 3e showed no apparent toxicity in both HepG2 and Vero cells. The findings presented herein will advance the quest for novel, specific inhibitors targeting MtFolB, an attractive molecular target for TB drug development. Crystal structure of dihydroneopterin aldolase from Mycobacterium tuberculosis associated with 8-mercaptoguanine, and development of novel S8-functionalized analogues as inhibitors: Synthesis, enzyme inhibition, in vitro toxicity and antitubercular activity.,Czeczot AM, Muniz MN, Perello MA, Silva EED, Timmers LFSM, Berger A, Gonzalez LC, Arrache Goncalves G, Moura S, Machado P, Bizarro CV, Basso LA J Enzyme Inhib Med Chem. 2024 Dec;39(1):2388207. doi: , 10.1080/14756366.2024.2388207. Epub 2024 Aug 14. PMID:39140692[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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