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Related Concept Videos

Protein Networks02:26

Protein Networks

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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.
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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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The Ras-gene-encoded proteins are regulators of signaling pathways controlling cell proliferation, differentiation, or cell survival. The Ras-gene family in humans constitutes three primary members—the HRas, NRas, and KRas. These genes code for four functionally distinct yet closely related proteins—the HRas, NRas, KRas4A, and KRas4B. The involvement of mutant Ras genes in human cancer was first discovered in 1982 and is among the most common causes of human tumorigenesis.
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Dissecting Multi-protein Signaling Complexes by Bimolecular Complementation Affinity Purification BiCAP
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Using BioID to Characterize the RAS Interactome.

Hema Adhikari1, Christopher M Counter2,3

  • 1Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, NC, USA.

Methods in Molecular Biology (Clifton, N.J.)
|May 12, 2021
PubMed
Summary
This summary is machine-generated.

Researchers used BioID proximity labeling to find proteins interacting with RAS oncoproteins. This unbiased method helps understand RAS signaling and identify new therapeutic targets for cancer treatment.

Keywords:
BioIDBirAHRASInteractomeKRASNRASProximity labeling

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Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • RAS oncoproteins are critical regulators of cell signaling, and their mutations drive many cancers.
  • Understanding the protein interactome of RAS is essential for elucidating its oncogenic functions and identifying therapeutic strategies.

Purpose of the Study:

  • To develop and present a detailed protocol for identifying RAS-interacting proteins using proximity labeling.
  • To leverage the BioID methodology for an unbiased discovery of proteins in the vicinity of oncogenic RAS.

Main Methods:

  • Utilized the BioID (proximity-dependent biotinylation) technique.
  • Applied the protocol to capture proteins in the immediate vicinity of RAS oncoproteins.
  • Focused on identifying both strong and weak/transient protein interactions.

Main Results:

  • Successfully established a protocol for unbiased identification of proteins associated with RAS oncoproteins.
  • Demonstrated the capability of BioID to capture a comprehensive set of proximal proteins, including potentially weak or transient interactors.

Conclusions:

  • Proximity labeling via BioID is a powerful, unbiased approach to study the RAS interactome.
  • This methodology provides valuable insights into RAS-regulated signaling pathways.
  • The identified proteins represent potential novel therapeutic targets for RAS-driven cancers.