Regulation of Enzyme Activity

  • B. D. Sanwal
Part of the Biological Regulation and Development book series (BRD, volume 2)


A glance at any map showing the scope, theory, principles, and techniques of metabolic pathways is sufficient for one to realize the need for regulation of the myriad enzymes that catalyze the individual reactions in these pathways. A controlled and coordinated flow of metabolites in the interconnected catabolic, anabolic, and amphibolic routes is absolutely essential to support the ever-changing energy and growth demands of a cell (Davis, 1961; Sanwal, 1970). This is achieved in all living systems principally by the regulation of critical, strategically placed enzymes of individual pathways. (See Goldberger’s definition of “regulation” in Volume 1, Chapter 1.) Control can be exerted by a change in the quantities or catalytic efficiencies of the enzymes. The quantity of an enzyme can be regulated by an alteration of either its rate of synthesis or its rate of degradation. The former encompasses regulatory mechanisms that act at the genetic level, such as induction and repression, and are discussed in Volume 1 of this treatise; the latter encompasses regulatory mechanisms that act at the level of protein turnover, and are discussed in Chapter 2 of this volume.


Glutamine Synthetase Fatty Acid Synthetase Allosteric Site Ornithine Transcarbamylase Negative Cooperativity 
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Copyright information

© Springer Science+Business Media New York 1980

Authors and Affiliations

  • B. D. Sanwal
    • 1
  1. 1.Department of BiochemistryUniversity of Western OntarioCanada

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