Mechanism-based inactivation of N-arylhydroxamic acid N,O-acyltransferase by 7-substituted-N-hydroxy-2-acetamidofluorenes
作者:Virginia C. Marhevka、Nancy A. Ebner、Russell D. Sehon、Patrick E. Hanna
DOI:10.1021/jm00379a005
日期:1985.1
N-Arylhydroxamicacid N,O-acyltransferase (AHAT) catalyzes the transfer of the N-acetyl group fromN-arylhydroxamicacids to arylamines. In the absence of an arylamine acceptor, AHAT catalyzes the conversion of N-arylhydroxamicacids to reactive electrophilic intermediates that become irreversibly bound to cellular nucleophiles, including those present on AHAT itself. As part of an investigation of
Substituent effects on the bioactivation of 2-(N-hydroxyacetamido)fluorenes by N-arylhydroxamic acid N,O-acyltransferase
作者:Adnan A. Elfarra、Patrick E. Hanna
DOI:10.1021/jm00148a014
日期:1985.10
A series of 7-substituted analogues of 2-(N-hydroxyacetamido)fluorene (1) was subjected to bioactivation by a partially purified preparation of hamster hepatic AHAT, and the rates of methylthio adduct formation resulting from the reaction of the activated intermediates with N-acetylmethionine were determined. Electronegative substituents enhanced the amount of adduct formed; this finding contrasted