Oscillations in coupled enzymic reactions at high concentration of enzyme

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Abstract

The transient-state kinetic consequences of the coupling of a single-enzyme reaction to other metabolic reactions have been examined in generalized terms. Analytical data are presented which specify under what conditions such coupling may lead to an oscillatory transient rate behaviour of a reaction system involving an enzyme operating by a Michaelian mechanism. The results indicate that the presence of enzyme in concentrations comparable to those of substrate and product may represent a hitherto unforeseen possible source of weakly damped, or even sustained, oscillations in metabolic networks. This observation has some important implications with regard to the occurrence of oscillations in biochemical reaction systems and to transient-state kinetic modelling of metabolic systems.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Organic Chemistry

Keywords

  • End-product inhibition, High enzyme concentration, Metabolic oscillation, Ribulose 1,5-bisphosphate carboxylase, Steady-state approximation
Original languageEnglish
Pages (from-to)118-122
Number of pages5
JournalBBA - Protein Structure and Molecular Enzymology
Volume1119
Issue number2
Publication statusPublished - 1992 Feb 26
Publication categoryResearch
Peer-reviewedYes