6mhb
Glutathione S-Transferase Omega 1 bound to covalent inhibitor 18
Structural highlights
FunctionGSTO1_HUMAN Exhibits glutathione-dependent thiol transferase and dehydroascorbate reductase activities. Has S-(phenacyl)glutathione reductase activity. Has also glutathione S-transferase activity. Participates in the biotransformation of inorganic arsenic and reduces monomethylarsonic acid (MMA) and dimethylarsonic acid.[1] [2] [3] [4] [5] Publication Abstract from PubMedUsing reported glutathione S-transferase omega 1 (GSTO1-1) co-crystal structures, we designed and synthesized acrylamide-containing compounds that covalently bind to Cys32 on the catalytic site. Starting from a thiazole derivative 10 (GSTO1-1 IC50 = 0.6 microM), compound 18 was synthesized and co-crystalized with GSTO1. Modification on the amide moiety of hit compound 10 significantly increased the GSTO1-1 inhibitory potency. We solved the co-crystal structures of new derivatives, 37 and 44, bearing amide side chain bound to GSTO1. These new structures showed a reorientation of the phenyl thiazole core of inhibitors, 37 and 44, when compared to 18. Guided by the co-crystal structure of GSTO1:44, analog 49 was designed resulting in the most potent GSTO1-1 inhibitor (IC50 = 0.22 +/- 0.02 nM) known to date. We believe that our data will inform the future studies of developing GSTO1-1 as a new drug target for cancer therapy. Structure-based Design of N-(5-phenylthiazol-2-yl)acrylamides as Novel and Potent Glutathione S-Transferase Omega 1 Inhibitors.,Dai W, Samanta S, Xue D, Petrunak EM, Stuckey JA, Han Y, Sun D, Wu Y, Neamati N J Med Chem. 2019 Feb 8. doi: 10.1021/acs.jmedchem.8b01960. PMID:30735370[6] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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