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Structure-activity relationships in the inactivation of elastase by β-sultam

Hinchliffe, Paul S., Wood, J. Matthew, Davis, Andrew M., Austin, Rupert P., Beckett, R. Paul and Page, Michael I. (2003) Structure-activity relationships in the inactivation of elastase by β-sultam. Organic and Biomolecular Chemistry, 1 (1). pp. 67-80. ISSN 1477-0539

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Abstract

N-Acyl--sultams are time dependent irreversible active site directed inhibitors of elastase. The rate of inactivation is first order with respect to -sultam concentration and the second order rate constants show a similar dependence on pH to that for the hydrolysis of a peptide substrate. Inactivation is due to the formation of a stable l l enzyme inhibitor complex as a result of the active site serine being sulfonylated by the -sultam. Ring opening of the -sultam occurs by S–N fission in contrast to the C–N fission observed in the acylation of elastase by N-acylsulfonamides. Structure–activity effects are compared between sulfonylation of the enzyme and alkaline hydrolysis. Variation in 4-alkyl and N-substituted -sultams causes differences in the rates of inactivation by 4 orders of magnitude

Item Type: Article
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Schools: School of Applied Sciences
School of Applied Sciences > Biomolecular Sciences Research Centre
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Date Deposited: 11 Feb 2008 10:14
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URI: http://eprints.hud.ac.uk/id/eprint/520

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