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Grigorenko VG, Petrova TE, Carolan C, Rubtsova MY, Uporov IV, Pereira J, Chojnowski G, Samygina VR, Lamzin VS, Egorov AM. Crystal structures of the molecular class A β-lactamase TEM-171 and its complexes with tazobactam. Acta Crystallogr D Struct Biol 2022; 78:825-834. [DOI: 10.1107/s2059798322004879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 05/06/2022] [Indexed: 11/10/2022] Open
Abstract
The resistance of bacteria to β-lactam antibiotics is primarily caused by the production of β-lactamases. Here, novel crystal structures of the native β-lactamase TEM-171 and two complexes with the widely used inhibitor tazobactam are presented, alongside complementary data from UV spectroscopy and fluorescence quenching. The six chemically identical β-lactamase molecules in the crystallographic asymmetric unit displayed different degrees of disorder. The tazobactam intermediate was covalently bound to the catalytic Ser70 in the trans-enamine configuration. While the conformation of tazobactam in the first complex resembled that in published β-lactamase–tazobactam structures, in the second complex, which was obtained after longer soaking of the native crystals in the inhibitor solution, a new and previously unreported tazobactam conformation was observed. It is proposed that the two complexes correspond to different stages along the deacylation path of the acyl-enzyme intermediate. The results provide a novel structural basis for the rational design of new β-lactamase inhibitors.
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Antipin RL, Beshnova DA, Petrov RA, Shiryaeva AS, Andreeva IP, Grigorenko VG, Rubtsova MY, Majouga AG, Lamzin VS, Egorov AM. Synthesis, SAR and molecular docking study of novel non-β-lactam inhibitors of TEM type β-lactamase. Bioorg Med Chem Lett 2017; 27:1588-1592. [DOI: 10.1016/j.bmcl.2017.02.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 02/10/2017] [Accepted: 02/13/2017] [Indexed: 10/20/2022]
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Novel non-β-lactam inhibitor of β-lactamase TEM-171 based on acylated phenoxyaniline. Biochimie 2017; 132:45-53. [DOI: 10.1016/j.biochi.2016.10.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 10/18/2016] [Indexed: 11/27/2022]
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