Stable Benzotriazole Esters as Mechanism-Based Inactivators of the Severe Acute Respiratory Syndrome 3CL Protease
Resource
Chemistry & Biology 13 (3): 261-268
Journal
Chemistry & Biology
Journal Volume
13
Journal Issue
3
Pages
261-268
Date Issued
2006
Date
2006
Author(s)
Wu, Chung-Yi
King, Ke-Yung
Kuo, Chih-Jung
Wu, Ying-Ta
Ho, Ming-Yi
Liao, Chung-Lin
Shie, Jiun-Jie
Liang, Po-Huang
Wong, Chi-Huey
Abstract
Severe acute respiratory syndrome (SARS) is caused by a newly emerged coronavirus that infected more than 8000 individuals and resulted in more than 800 fatalities in 2003. Currently, there is no effective treatment for this epidemic. SARS-3CLpro has been shown to be essential for replication and is thus a target for drug discovery. Here, a class of stable benzotriazole esters was reported as mechanism-based inactivators of 3CLpro, and the most potent inactivator exhibited a kinact of 0.0011 s-1 and a Ki of 7.5 nM. Mechanistic investigation with kinetic and mass spectrometry analyses indicates that the active site Cys145 is acylated, and that no irreversible inactivation was observed with the use of the C145A mutant. In addition, a noncovalent, competitive inhibition became apparent by using benzotriazole ester surrogates in which the bridged ester-oxygen group is replaced with carbon. © 2006 Elsevier Ltd. All rights reserved.
SDGs
File(s)![Thumbnail Image]()
Loading...
Name
09.pdf
Size
392.02 KB
Format
Adobe PDF
Checksum
(MD5):a0645e3d4fdbd1250c52e929579b4e9f