Alkylating esters X. The reaction of some aziridine alkylating agents with methionine and S-methyl cysteine |
| |
Authors: | AR Jones PA Capps |
| |
Institution: | 1. Pharmacology Department, University of Manchester, Manchester M13 9PL Great Britain;2. Paterson Laboratories, Christie Hospital and Holt Radium Institute, Manchester M20 9BX Great Britain |
| |
Abstract: | Two biologically active aziridine ring-containing compounds, N,N-ethylene urethane (I) and N,N-ethylene urea (II), have been shown to react with methionine in dilute phosphate buffer (pH 7.4) at 37°C. Degradative procedures indicate that the aziridine ring effectively alkylates the thio ether group of methionine and other thio ether-containing amino acids to produce sulphonium salts (V). By using 35S]methionine, the sulphonium salts have been shown to be quite stable under physiological conditions ( 7–9 days) hydrolysing to convert the methionine residue to homoserine.It is proposed that similar alkylations of methionyl residues in vivo by aziridine-alkylating agents may explain the complex, and as yet unknown, metabolic fate of the aziridine ring and could also be a factor contributing to the diverse effects that these agents have on living cells. |
| |
Keywords: | AM4 TEM triethylenemelamine |
本文献已被 ScienceDirect 等数据库收录! |
|