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Related Concept Videos

Enzyme Kinetics01:19

Enzyme Kinetics

104.9K
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...
104.9K

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Membrane Transport Processes Analyzed by a Highly Parallel Nanopore Chip System at Single Protein Resolution
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Single-molecule nanopore enzymology.

Kherim Willems1,2, Veerle Van Meervelt1,3, Carsten Wloka3

  • 1Department of Chemistry, KU Leuven, Celestijnenlaan 200G, 3001 Leuven, Belgium.

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
|June 21, 2017
PubMed
Summary

Biological nanopores, membrane proteins creating nanoscale channels, enable single-molecule analysis. Nanopore enzymology allows long-term observation of native proteins and enzymes, offering unique insights into their function.

Keywords:
nanopore enzymologyprotein trappingreviewsingle-molecule

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Area of Science:

  • Biophysics
  • Biochemistry
  • Molecular Biology

Background:

  • Biological nanopores are membrane proteins forming nanoscale water channels.
  • Reconstituted nanopores in artificial membranes with applied voltage allow ionic current monitoring.
  • Applications include chemical reaction monitoring, molecular recognition, and DNA sequencing.

Purpose of the Study:

  • To describe approaches and challenges in nanopore enzymology.
  • To highlight the advantages of single-molecule, long-timescale observation of proteins and enzymes.

Main Methods:

  • Utilizing biological nanopores reconstituted in artificial membranes.
  • Applying bias voltage across the membrane to generate measurable ionic current.
  • Monitoring enzymatic reactions at the single-molecule level.

Main Results:

  • Nanopore analysis enables the study of individual proteins and enzymes.
  • Nanopore enzymology allows for extended observation periods of native protein behavior.
  • This technique provides a unique window into enzymatic processes.

Conclusions:

  • Nanopore enzymology is a powerful tool for studying protein and enzyme dynamics.
  • The method offers unprecedented long-timescale, single-molecule insights.
  • Further development in nanopore enzymology promises advancements in understanding biological systems.