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Introduction to Mechanisms of Enzyme Catalysis01:13

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For many years, scientists thought that enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model stated that the enzyme and substrate fit together perfectly in one instantaneous step. However, current research supports a more refined view scientists call induced fit. The induced-fit model expands upon the lock-and-key model by describing a more dynamic interaction between enzyme and substrate. As the enzyme and substrate come together, their interaction causes...
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Binding sites linkages can regulate a protein's function.  For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
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Allosteric regulation of enzymes occurs when the binding of an effector molecule to a site that is different from the active site causes a change in the enzymatic activity. This alternate site is called an allosteric site, and an enzyme can contain more than one of these sites. Allosteric regulation can either be positive or negative, resulting in an increase or decrease in enzyme activity. Most enzymes that display allosteric regulation are metabolic enzymes involved in the degradation or...
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Updated: Feb 23, 2026

Expression, Purification, Crystallization, and Enzyme Assays of Fumarylacetoacetate Hydrolase Domain-Containing Proteins
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Allostery in enzyme catalysis.

George P Lisi1, J Patrick Loria2

  • 1Department of Chemistry, Yale University, New Haven, CT, USA.

Current Opinion in Structural Biology
|September 3, 2017
PubMed
Summary
This summary is machine-generated.

Enzymes use dynamic allosteric pathways, driven by conformational changes, to regulate function. Allosteric effectors modulate these motions, optimizing enzyme activity and ligand binding.

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Area of Science:

  • Biochemistry
  • Enzyme kinetics
  • Structural biology

Background:

  • Allostery is crucial for enzyme regulation.
  • Conformational ensembles are key to modern allostery interpretations.
  • Allosteric effectors influence enzyme dynamics.

Purpose of the Study:

  • To review principles of allosteric regulation in enzyme catalysis.
  • To highlight dynamic allostery through enzyme case studies.

Main Methods:

  • Literature review of allosteric regulation.
  • Analysis of enzyme conformational dynamics.
  • Case studies of specific enzymes.

Main Results:

  • Allosteric regulation relies on dynamic conformational pathways.
  • Effectors modulate enzyme dynamics to control function.
  • Specific enzymes exemplify dynamic allostery principles.

Conclusions:

  • Dynamic allostery is a fundamental mechanism in enzyme catalysis.
  • Understanding enzyme dynamics is critical for allosteric control.
  • Further research into enzyme conformational ensembles is warranted.