Reactions of Organoselenenyl Iodides with Thiouracil Drugs: An Enzyme Mimetic Study on the Inhibition of Iodothyronine Deiodinase
作者:Wolf-Walther du Mont、Govindasamy Mugesh、Cathleen Wismach、Peter G. Jones
DOI:10.1002/1521-3773(20010702)40:13<2486::aid-anie2486>3.0.co;2-n
日期:2001.7.2
The proposed mechanism of iodothyronine deiodinase inhibition by the thiourea-derived drugs 6-n-propylthiouracil (PTU) and 6-methylthiouracil is supported by experimental evidence. Model reactions with sterically or coordinatively stabilized organoselenyl iodides as enzyme-mimetic substrates (E-SeI; see scheme) support the proposal that PTU reacts not with the enzyme but with the enzyme-SeI intermediate containing a covalent Se-I bond, and suggest that the Se-I bond is kinetically activated by basic amino acid groups such as histidine.