The enzymic nature of antibody catalysis: Development of multistep kinetic processing

Stephen J. Benkovic, Joseph A. Adams, C. L. Borders, Kim D. Janda, Rihard A. Lerner

Research output: Contribution to journalArticle

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Abstract

Detailed kinetic investigations of a catalytic antibody that promotes the hydrolyses of an anilide and phenyl ester show that this catalyst uses a multistep kinetic sequence resembling that found in serine proteases to hydrolyze its substrates, although antibody was elicited to a single transition-state analog. Like the serine proteases the antibody catalyzes the hydrolysis reactions through a putative covalent intermediate, but unlike the enzymes it may use hydroxide ion to deave the intermediates. Nevertheless, the antibody is a potent catalyst with turnover at higher pH values rivaling that of chymotrypsin. This analysis also reveals that turnover by the antibody is ultimately limited by product desorption, suggesting that improvements in catalytic efficiency may be achieved by judicious changes in the structure of the substrate, so that it is not superimposable on that of the eliciting hapten.

Original languageEnglish (US)
Pages (from-to)1135-1139
Number of pages5
JournalScience
Volume250
Issue number494
StatePublished - Jan 1 1990

All Science Journal Classification (ASJC) codes

  • General

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    Benkovic, S. J., Adams, J. A., Borders, C. L., Janda, K. D., & Lerner, R. A. (1990). The enzymic nature of antibody catalysis: Development of multistep kinetic processing. Science, 250(494), 1135-1139.