TY  - JOUR
PY  - 1994//
TI  - N-(sulfonyloxy)phthalimides and analogues are potent inactivators of serine proteases
JO  - Journal of biological chemistry
A1  - Neumann, U.
A1  - Gütschow, M.
SP  - 21561
EP  - 21567
VL  - 269
IS  - 34
N2  - A series of 2-(sulfonyloxy) and 2-(acyloxy)-1H-isoindole-1,3(2H)-diones and analogous 1H-benz[de]isoquinoline-1,3(2H)-diones was prepared, and their potential to inactivate chymotrypsin was investigated. The N-(sulfonyloxy) and N-(acyloxy)phthalimides were found to be potent inactivators of chymotrypsin and related serine proteinases. For the most active compounds, N-(dansyloxy)phthalimide and N-(tosyloxy)phthalimide, the second-order rate constant of chymotrypsin inactivation was in the range of 250,000 m-1 s-1. N-(Mesyloxy)-phthalimide was the most active compound for inactivation of leukocyte elastase. It was shown that these compounds act as true suicide substrates. Enzyme-catalyzed opening of the heterocyclic ring results in the formation of an acyl-enzyme with attached O-acyl or O-sulfonylhydroxamic acid moiety. Subsequent Lossen rearrangement leads to the formation of a highly reactive isocyanate, which irreversibly modifies the target protease.<p /> <p>Language: en</p>
LA  - en
SN  - 0021-9258
UR  - http://dx.doi.org/
ID  - ref1
ER  -