Why urease is a di-nickel enzyme whereas the CcrA β-lactamase is a di-zinc enzyme

CE Valdez, AN Alexandrova - The Journal of Physical Chemistry …, 2012 - ACS Publications
Ureases and metallo-β-lactamases are amide hydrolases closely related in function and
structure. However, one major difference between them is that the former uses two nickel …

Quantum mechanical and molecular dynamics simulations of ureases and Zn β‐lactamases

G Estiu, D Suárez, KM Merz - Journal of computational …, 2006 - Wiley Online Library
Herein we briefly review theoretical contributions that have increased our understanding of
the structure and function of metallo‐β‐lactamases and ureases. Both are bimetallic …

New Delhi metallo-β-lactamase I: Substrate binding and catalytic mechanism

M Zheng, D Xu - The Journal of Physical Chemistry B, 2013 - ACS Publications
Metallo-β-lactamases can hydrolyze and deactivate lactam-containing antibiotics, which is
the major mechanism for causing drug resistance in the treatment of bacterial infections …

Quantum mechanical/molecular mechanical studies of zinc hydrolases

D Xu, Q Cui, H Guo - International Reviews in Physical Chemistry, 2014 - Taylor & Francis
Metallo-enzymes play an indispensible role in many biological functions, and their modes of
substrate binding and catalysis differ considerably from those of metal-free enzymes. A …

Antibiotic Binding to Dizinc β-Lactamase L1 from Stenotrophomonas maltophilia:  SCC-DFTB/CHARMM and DFT Studies

D Xu, H Guo, Q Cui - The Journal of Physical Chemistry A, 2007 - ACS Publications
A dizinc β-lactamase (L1 from Stenotrophomonas maltophilia) complexed with an antibiotic
compound (moxalactam) has been studied using a hybrid quantum mechanical/molecular …

Zn 2+ catalysed hydrolysis of β-lactams: experimental and theoretical studies on the influence of the β-lactam structure

N Díaz, TL Sordo, D Suárez, R Méndez… - New Journal of …, 2004 - pubs.rsc.org
We present both experimental and theoretical results on simple model systems of zinc-β-
lactamases. Kinetic studies show that the rate of degradation of β-lactam antibiotics in the …

Hydrolysis of cephalexin and meropenem by New Delhi metallo-β-lactamase: the substrate protonation mechanism is drug dependent

CK Das, NN Nair - Physical Chemistry Chemical Physics, 2017 - pubs.rsc.org
Emergence of antibiotic resistance due to New Delhi metallo-β-lactamase (NDM-1) bacterial
enzymes is of great concern due to their ability to hydrolyze a wide range of antibiotics …

Role of zinc content on the catalytic efficiency of B1 metallo β-lactamases

M Dal Peraro, AJ Vila, P Carloni… - Journal of the American …, 2007 - ACS Publications
Metallo β-lactamases (MβL) are enzymes naturally evolved by bacterial strains under the
evolutionary pressure of β-lactam antibiotic clinical use. They have a broad substrate …

Hybrid QM/MM and DFT Investigations of the Catalytic Mechanism and Inhibition of the Dinuclear Zinc Metallo-β-Lactamase CcrA from Bacteroides fragilis

H Park, EN Brothers, KM Merz - Journal of the American Chemical …, 2005 - ACS Publications
Based on hybrid QM/MM molecular dynamics simulation and density functional theoretical
(DFT) calculations, we investigate the mechanistic and energetic features of the catalytic …

Binding of benzylpenicillin to metallo-β-lactamase: a QM/MM study

L Olsen, T Rasmussen, L Hemmingsen… - The Journal of Physical …, 2004 - ACS Publications
Metallo-β-lactamases are bacterial enzymes that may function with either one or two zinc
ions bound in the active site. In this work, the binding of benzylpenicillin to mono-zinc …