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Related Concept Videos

Introduction to Mechanisms of Enzyme Catalysis01:13

Introduction to Mechanisms of Enzyme Catalysis

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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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Enzymes speed up reactions by lowering the activation energy of the reactants. The speed at which the enzyme turns reactants into products is called the rate of reaction. Several factors impact the rate of reaction, including the number of available reactants. Enzyme kinetics is the study of how an enzyme changes the rate of a reaction.
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Enzymes02:34

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Inside living organisms, enzymes act as catalysts for many biochemical reactions involved in cellular metabolism. The role of enzymes is to reduce the activation energies of biochemical reactions by forming complexes with its substrates. The lowering of activation energies favor an increase in the rates of biochemical reactions.
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Enzyme kinetics studies the rates of biochemical reactions. Scientists monitor the reaction rates for a particular enzymatic reaction at various substrate concentrations. Additional trials with inhibitors or other molecules that affect the reaction rate may also be performed.
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Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
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Unraveling Entropic Rate Acceleration Induced by Solvent Dynamics in Membrane Enzymes
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Enzyme dynamics: Looking beyond a single structure.

Pratul K Agarwal1,2, David N Bernard3, Khushboo Bafna4

  • 1Department of Physiological Sciences and High-Performance Computing Center, Oklahoma State University, Stillwater, Oklahoma 74078.

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|April 26, 2021
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Summary
This summary is machine-generated.

Enzymes are not static; their dynamic motions are crucial for function and catalysis. Understanding enzyme dynamics opens new avenues for biocatalysis and enzyme engineering.

Keywords:
Biocatalysisconformational sub-statesdirected evolutionenzyme engineeringprotein dynamics

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Area of Science:

  • Biochemistry
  • Enzymology
  • Structural Biology

Background:

  • Traditional enzyme studies focus on static structures.
  • Emerging evidence highlights the importance of enzyme dynamics and conformational flexibility.
  • Enzyme motions occur across various timescales, influencing catalytic mechanisms.

Purpose of the Study:

  • To review recent developments in understanding enzyme dynamics.
  • To discuss challenges and opportunities in studying enzyme motion.
  • To explore the implications of enzyme dynamics for biocatalysis and enzyme engineering.

Main Methods:

  • Analysis of existing literature on enzyme dynamics.
  • Discussion of experimental and computational approaches.
  • Consideration of enzyme function in cellular environments versus dilute solutions.

Main Results:

  • Enzyme internal motions are integral to catalytic mechanisms.
  • Studying dynamics provides insights beyond static structures.
  • Cellular milieu conditions differ significantly from experimental settings.

Conclusions:

  • Enzyme dynamics is a critical aspect of enzyme function and catalysis.
  • Further research is needed to overcome technical challenges and study enzymes in native-like conditions.
  • Integrating enzyme dynamics can lead to advancements in biocatalysis and enzyme engineering for various applications.