6ZA6

M. tuberculosis salicylate synthase MbtI in complex with Ba2+

6ZA6 の概要

• エントリーDOI: 10.2210/pdb6za6/pdb
• 分子名称: Salicylate synthase, GLYCEROL, PHOSPHATE ION, ... (6 entities in total)
• 機能のキーワード: salicylate, isochorismate, chorismate, mycobactins, lyase
• 由来する生物種: Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 197225.92

構造登録者

Mori, M.,Villa, S.,Meneghetti, F.,Bellinzoni, M. (登録日: 2020-06-04, 公開日: 2020-07-01, 最終更新日: 2024-01-24)

主引用文献

Mori, M.,Stelitano, G.,Gelain, A.,Pini, E.,Chiarelli, L.R.,Sammartino, J.C.,Poli, G.,Tuccinardi, T.,Beretta, G.,Porta, A.,Bellinzoni, M.,Villa, S.,Meneghetti, F.
Shedding X-ray Light on the Role of Magnesium in the Activity ofMycobacterium tuberculosisSalicylate Synthase (MbtI) for Drug Design.
J.Med.Chem., 63:7066-7080, 2020

PubMed Abstract: The Mg-dependent salicylate synthase (MbtI) is a key enzyme involved in the biosynthesis of siderophores. Because iron is essential for the survival and pathogenicity of the microorganism, this protein constitutes an attractive target for antitubercular therapy, also considering the absence of homologous enzymes in mammals. An extension of the structure-activity relationships of our furan-based candidates allowed us to disclose the most potent competitive inhibitor known to date (, = 4 μM), which also proved effective on mycobacterial cultures. By structural studies, we characterized its unexpected Mg-independent binding mode. We also investigated the role of the Mg cofactor in catalysis, analyzing the first crystal structure of the MbtI-Mg-salicylate ternary complex. Overall, these results pave the way for the development of novel antituberculars through the rational design of improved MbtI inhibitors.

PubMed: 32530281
DOI: 10.1021/acs.jmedchem.0c00373

実験手法

X-RAY DIFFRACTION (1.804 Å)