[HTML][HTML] 1-Chloro-2, 4-dinitrobenzene Is an Irreversible Inhibitor of Human Thioredoxin Reductase: loss of thioredoxin disulfide reductase activity is accompanied by a …

ESJ Arnér, M Björnstedt, A Holmgren - Journal of Biological Chemistry, 1995 - ASBMB
Human thioredoxin reductase is a dimeric enzyme that catalyzes reduction of the disulfide in
oxidized thioredoxin by a mechanism involving transfer of electrons from NADPH via FAD to
a redox-active disulfide. 1-Chloro-2, 4-dinitrobenzene (DNCB) is an alkylating agent used
for depleting intracellular GSH and also showing distinct immunomodulatory properties. We
have discovered that low concentrations of DNCB completely inactivated human or bovine
thioredoxin reductase, with a second order rate constant in excess of 200 M-1 s-1, which is …