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Related Concept Videos

Protein-protein Interfaces02:04

Protein-protein Interfaces

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Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
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Protein Networks02:26

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An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
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Updated: Nov 3, 2025

Separation of Bioactive Small Molecules, Peptides from Natural Sources and Proteins from Microbes by Preparative Isoelectric Focusing IEF Method
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Target Protein-Oriented Isolations for Bioactive Natural Products.

Midori A Arai1

  • 1Faculty of Science and Technology, Keio University.

Chemical & Pharmaceutical Bulletin
|June 3, 2021
PubMed
Summary

Researchers developed novel protein-based methods to isolate natural products for drug discovery. These techniques efficiently identify compounds with potential as neural stem cell activators and cancer therapeutics, accelerating medicine development.

Keywords:
cancer cellnatural productneural stem cellprotein beadprotein plate

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Area of Science:

  • Natural Product Chemistry
  • Medicinal Chemistry
  • Drug Discovery

Background:

  • Natural products offer complex structures and bioactivities valuable for medicine development.
  • Existing isolation methods may not efficiently identify bioactive compounds.
  • Protein binding is a key indicator of a compound's bioactivity.

Purpose of the Study:

  • To develop and review protein-oriented isolation methods for discovering bioactive natural products.
  • To highlight the application of these methods in identifying neural stem cell differentiation activators and cancer drug candidates.
  • To demonstrate the utility of protein-based approaches for finding novel therapeutic agents.

Main Methods:

  • Protein beads method for isolating neural stem cell differentiation activators.
  • Protein plate method for identifying protein-protein interaction inhibitors.
  • Synthesis of isolated natural products.

Main Results:

  • Successful isolation of target protein-oriented natural products.
  • Identification of compounds with potential as neural stem cell differentiation activators.
  • Discovery of new potential cancer drug candidates.
  • Demonstration of protein-protein interaction inhibition.

Conclusions:

  • Protein-based natural product isolation is a powerful strategy for discovering new medicines.
  • Developed methods enable rapid identification of bioactive compounds from natural resources.
  • This approach accelerates the search for novel therapeutics, including cancer drugs and neural stem cell modulators.