Life: The Science of Biology 11th Edition

Published by W. H. Freeman
ISBN 10: 1-31901-016-4
ISBN 13: 978-1-31901-016-4

Chapter 8 - Energy, Enzymes, and Metabolism - 8.5 Enzyme Activities Can Be Regulated - 8.5 Recap - Learning Outcomes - Page 169: 2

Answer

Allosteric regulation refers to any form of regulation where the regulatory molecule bonds to an enzyme away from the active site, at a location called the allosteric site. Allosteric enzymes have multiple active sites spaced throughout different protein subunits. When an allosteric inhibitor binds to an enzyme, all of the active sites on the protein subunits are physically altered, which causes them to be less effective. Allosteric regulation includes almost all cases of noncompetitive inhibition and some cases of competitive inhibition.

Work Step by Step

Allosteric regulation refers to any form of regulation where the regulatory molecule bonds to an enzyme away from the active site, at a location called the allosteric site. Allosteric enzymes have multiple active sites spaced throughout different protein subunits. When an allosteric inhibitor binds to an enzyme, all of the active sites on the protein subunits are physically altered, which causes them to be less effective. Allosteric regulation includes almost all cases of noncompetitive inhibition and some cases of competitive inhibition.
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