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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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Updated: Jul 9, 2025

The Determination of Protease Specificity in Mouse Tissue Extracts by MALDI-TOF Mass Spectrometry: Manipulating PH to Cause Specificity Changes
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Redefining metalloproteases specificity through network proteolysis.

Orit Kollet1, Alakesh Das1, Nikos Karamanos2

  • 1The Weizmann Institute of Science, Department of Immunology and Regenerative Biology, Rehovot, Israel.

Trends in Molecular Medicine
|November 30, 2023
PubMed
Summary

Matrix metalloproteases (MMPs) and ADAMs remodel tissues. Understanding their complex network activity, beyond single enzyme actions, is key for developing targeted therapies for inflammation and cancer.

Keywords:
biomarkersdegradomicsextracellular matrix (ECM) remodelingmatrix metalloproteases (MMPs)protease specificityproteolytic network

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Molecular Biology

Background:

  • Proteolytic enzymes like matrix metalloproteases (MMPs) and ADAMs are crucial for cell surface and extracellular matrix (ECM) remodeling.
  • These processes are vital for tissue integrity and cellular functions in both health and disease.
  • Current therapeutic strategies targeting MMPs face challenges due to their broad activity.

Purpose of the Study:

  • To review the intricate network of MMP-mediated proteolytic cascades.
  • To highlight the importance of understanding MMPs beyond their individual substrate-enzyme interactions.
  • To emphasize the need for insights into MMP function and tissue specificity for drug discovery.

Main Methods:

  • Literature review of systems biology advances in proteolysis.
  • Analysis of MMPs' roles in initiating proteolytic cascades.
  • Examination of MMPs' impact on cellular processes and network consequences.

Main Results:

  • MMPs initiate complex proteolytic cascades, generating new substrates and modulating other MMPs.
  • These cascades involve activation or suppression of other MMPs and generation of signaling molecules.
  • The network activity of MMPs is critical for tissue remodeling and cellular signaling.

Conclusions:

  • Effective drug discovery for inflammation and cancer requires understanding MMPs' network functions, not just individual activities.
  • Targeting MMPs necessitates considering their intricate roles in dynamic cellular processes and network proteolysis.
  • Further research into MMP tissue specificity and network dynamics will enable novel therapeutic strategies.