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7090165 
Journal Article 
Discovery of a new type inhibitor of human glyoxalase I by myricetin-based 4-point pharmacophore 
Takasawa, R; Tao, A; Saeki, K; Shionozaki, N; Tanaka, Ryo; Uchiro, H; Takahashi, S; Yoshimori, A; Tanuma, S; , 
2011 
Yes 
Bioorganic & Medicinal Chemistry Letters
ISSN: 0960-894X
EISSN: 1464-3405 
PERGAMON-ELSEVIER SCIENCE LTD 
OXFORD 
21 
14 
4337-4342 
English 
21669529 
WOS:000292186400048 
The human glyoxalase I (hGLO I), which is a rate-limiting enzyme in the pathway for detoxification of apoptosis-inducible methylglyoxal (MG), has been expected as an attractive target for the development of new anti-cancer drugs. We have previously identified a natural compound myricetin as a substrate transition-state (Zn(2+)-bound MG-glutathione (GSH) hemithioacetal) mimetic inhibitor of hGLO I. Here, we constructed a hGLO I/inhibitor 4-point pharmacophore based on the binding mode of myricetin to hGLO I. Using this pharmacophore, in silico screening of chemical library was performed by docking study. Consequently, a new type of compound, which has a unique benzothiazole ring with a carboxyl group, named TLSC702, was found to inhibit hGLO I more effectively than S-p-bromobenzylglutathione (BBG), a well-known GSH analog inhibitor. The computational simulation of the binding mode indicates the contribution of Zn(2+)-chelating carboxyl group of TLSC702 to the hGLO I inhibitory activity. This implies an important scaffold-hopping of myricetin to TLSC702. Thus, TLSC702 may be a valuable seed compound for the generation of a new lead of anti-cancer pharmaceuticals targeting hGLO I. (C) 2011 Elsevier Ltd. All rights reserved.