Theoretical Test

MHz): δ 203, 178, 173, 132 (for two identical carbons), 127 (for two identicalcarbons), 65, 49, 48.δ, chemical shift; H, integrals; d, doublet; dd, doublet of doublet; J, couplingconstant; t, triplet; s, singletChorismate mutase is believed to stabilize the transition state of Claisenrearrangement. Thus it is an interesting target for inhibitor design. Inhibitors,called transition state analog (TSA)s that resemble the transition state (TS,e.g., the species in brackets “[ ]” above) of the reaction are designed tooccupy the active site. Several inhibitors were designed and synthesized,and among them eight turned out to be potent inhibitors of the enzyme. Thelower the IC 50 (inhibitor concentration of 50% of the enzymatic activity) value,the better the inhibitor.CO 2 HCO 2 HCO 2 HCO 2 HCO 2 HCO 2 HCO 2 HCO 2 HHOCO 2 HOH1IC 50 = 2.5 mMOH2IC 50 = 1.3 mMOH3IC 50 = 0.78 mMOH4IC 50 = 1.1 mM5IC 50 = 5.3 mMHO 2 CCO 2 HHaOCO 2 HHaOCO 2 HHO 2 COCO 2 HOH6IC 50 = 0.017 mMOH7IC 50 =0.0059 mMOH8IC 50 = 0.00015 mM22