5YPL

Crystal structure of NDM-1 bound to hydrolyzed imipenem representing an EP complex

5YPL の概要

• エントリーDOI: 10.2210/pdb5ypl/pdb
• 分子名称: Metallo-beta-lactamase NDM-1, ZINC ION, (2R,4S)-2-[(1S,2R)-1-carboxy-2-hydroxypropyl]-4-[(2-{[(Z)-iminomethyl]amino}ethyl)sulfanyl]-3,4-dihydro-2H-pyrrole-5-ca rboxylic acid, ... (6 entities in total)
• 機能のキーワード: ndm-1, imipenem, ep complex, hydrolase
• 由来する生物種: Escherichia coli
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 52291.51

構造登録者

Feng, H.,Wang, D.,Liu, W. (登録日: 2017-11-02, 公開日: 2018-02-21, 最終更新日: 2023-11-22)

主引用文献

Feng, H.,Liu, X.,Wang, S.,Fleming, J.,Wang, D.C.,Liu, W.
The mechanism of NDM-1-catalyzed carbapenem hydrolysis is distinct from that of penicillin or cephalosporin hydrolysis.
Nat Commun, 8:2242-2242, 2017

PubMed Abstract: New Delhi metallo-β-lactamases (NDMs), the recent additions to metallo-β-lactamases (MBLs), pose a serious public health threat due to its highly efficient hydrolysis of β-lactam antibiotics and rapid worldwide dissemination. The MBL-hydrolyzing mechanism for carbapenems is less studied than that of penicillins and cephalosporins. Here, we report crystal structures of NDM-1 in complex with hydrolyzed imipenem and meropenem, at resolutions of 1.80-2.32 Å, together with NMR spectra monitoring meropenem hydrolysis. Three enzyme-intermediate/product derivatives, EI, EI, and EP, are trapped in these crystals. Our structural data reveal double-bond tautomerization from Δ to Δ, absence of a bridging water molecule and an exclusive β-diastereomeric product, all suggesting that the hydrolytic intermediates are protonated by a bulky water molecule incoming from the β-face. These results strongly suggest a distinct mechanism of NDM-1-catalyzed carbapenem hydrolysis from that of penicillin or cephalosporin hydrolysis, which may provide a novel rationale for design of mechanism-based inhibitors.

PubMed: 29269938
DOI: 10.1038/s41467-017-02339-w

実験手法

X-RAY DIFFRACTION (1.8 Å)