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Related Concept Videos

Introduction to Enzyme Kinetics01:19

Introduction to Enzyme Kinetics

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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.
The experimenter can then plot the initial reaction rate or velocity (Vo) of a given trial against the substrate concentration ([S]) to obtain a graph of the reaction properties. For many enzymatic reactions involving a...
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Enzyme Kinetics01:19

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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.
Scientists typically study enzyme kinetics with a fixed amount of enzyme in the controlled environment of a test tube. When more reactant, or substrate, is...
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Enzymes02:34

Enzymes

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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.
Enzyme deficiencies can often translate into life-threatening diseases. For example, a genetic abnormality resulting in the deficiency of the enzyme G6PD...
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The Equilibrium Binding Constant and Binding Strength02:18

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The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
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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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Protein Dynamics in Living Cells

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Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
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Unraveling Entropic Rate Acceleration Induced by Solvent Dynamics in Membrane Enzymes
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Kinetic Measurements for Enzyme Immobilization.

Michael J Cooney1

  • 1Hawaii Natural Energy Institute, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, 1680 East-west Rd., Honolulu, HI, 96822, USA. mcooney@hawaii.edu.

Methods in Molecular Biology (Clifton, N.J.)
|October 23, 2016
PubMed
Summary
This summary is machine-generated.

Enzyme kinetics, the study of enzyme reaction rates, faces challenges with immobilized enzymes. This review explores adapting Michaelis-Menten kinetics for immobilized enzymes, addressing matrix barriers and improving enzyme properties.

Keywords:
Enzyme activityEnzyme kineticsImmobilizationMichaelis–Menten

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Area of Science:

  • Biochemistry
  • Enzyme kinetics
  • Biotechnology

Background:

  • Enzyme kinetics studies reaction rates and mechanisms, with the Michaelis-Menten equation being a standard model.
  • Soluble enzymes often require immobilization for industrial applications to enhance stability and reusability.
  • Immobilization presents challenges for traditional kinetic analysis due to matrix interference.

Purpose of the Study:

  • To review enzyme activity and kinetics in the context of immobilized enzymes.
  • To discuss the limitations of applying Michaelis-Menten kinetics to immobilized systems.
  • To present novel protocols for analyzing immobilized enzyme kinetics.

Main Methods:

  • Adaptation of Michaelis-Menten equation for immobilized enzyme systems.
  • Controlled application of kinetic coefficients (Vmax, KM) to assess immobilization effects.
  • Development of protocols to overcome immobilization-related measurement barriers.

Main Results:

  • Michaelis-Menten coefficients can evaluate immobilization effects on enzyme activity under controlled conditions.
  • Immobilization can improve enzyme stability, activity, and selectivity.
  • Novel protocols address constraints imposed by immobilization matrices.

Conclusions:

  • Adapting enzyme kinetics models like Michaelis-Menten is crucial for understanding and optimizing immobilized enzymes.
  • Careful application of kinetic parameters can reveal immobilization impacts.
  • New methods are needed to accurately measure kinetics of immobilized enzymes.