Determination of the bound conformation of a competitive nanomolar inhibitor of mycobacterium tuberculosis type II dehydroquinase by NMR spectroscopy.
The synergy between tuberculosis and the AIDS epidemic, along with the surge of multidrug-resistant isolates of M. tuberculosis, has reaffirmed tuberculosis as a primary public health threat. It is therefore necessary to discover new, safe, and more efficient antibiotics against this disease. On the other hand, mapping the dynamic interactions of inhibitors of a target protein can provide information for the development of more potent inhibitors and consequently, more potent potential drugs. In this context, the conformational binding of our previously reported nanomolar inhibitor of M. tuberculosis type II dehydroquinase, the 3-nitrophenyl derivative 1, was studied using saturation transfer difference (STD) and transferred NOESY experiments. These studies have shown that in the bound state, one conformation of those present in solution of the competitive nanomolar inhibitor 3-nitrophenyl derivative 1 is selected. In the bound conformation, the aromatic ring is slightly shifted from coplanarity, with the double bond and the nitro group of 1 oriented towards the double bond side.
Prazeres
Verónica F V
VF
Laboratorio de Química Orgánica, CSIC and Departamento de Química Orgánica, Facultad de Química, Universidad de Santiago de Compostela, Avenida de las Ciencias s/n, 15782 Santiago de Compostela, Spain.
Sánchez-Sixto
Cristina
C
Castedo
Luis
L
Canales
Angeles
A
Cañada
Francisco Javier
FJ
Jiménez-Barbero
Jesús
J
Lamb
Heather
H
Hawkins
Alastair R
AR
González-Bello
Concepción
C
D000995:Antitubercular Agents / Q000737:chemistry* / Q000494:pharmacology; D019295:Computational Biology; D004791:Enzyme Inhibitors / Q000737:chemistry* / Q000494:pharmacology; D006836:Hydro-Lyases / Q000037:antagonists & inhibitors*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008968:Molecular Conformation; D009169:Mycobacterium tuberculosis / Q000187:drug effects / Q000201:enzymology*; D011485:Protein Binding
D000995:Antitubercular Agents; D004791:Enzyme Inhibitors; D006836:Hydro-Lyases; C020000:3-dehydroquinate dehydratase