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Related Experiment Videos

Tumor necrosis factor-alpha converting enzyme.

Roy A Black1

  • 1Immunex Corporation, 51 University Street, Seattle, WA 98101, USA. blackr@immunex.com

The International Journal of Biochemistry & Cell Biology
|December 6, 2001
PubMed
Summary

Tumor necrosis factor-alpha converting enzyme (TACE) sheds proteins like TNF-alpha. Understanding TACE substrate recognition and regulation is key for developing new anti-inflammatory drugs.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • Tumor necrosis factor-alpha converting enzyme (TACE), also known as ADAM17, is a metalloprotease crucial for shedding membrane-bound proteins.
  • TACE activity regulates the release of soluble tumor necrosis factor-alpha (TNF-alpha) and other growth factors, impacting cellular signaling and inflammation.
  • While TACE expression is constitutive, its surface availability decreases upon cell activation, suggesting complex regulatory mechanisms.

Purpose of the Study:

  • To elucidate the mechanisms of substrate recognition and regulation of TACE shedding activity.
  • To understand how cell activators modulate TACE function through intracellular kinase cascades.
  • To provide insights for the development of targeted TACE inhibitors for inflammatory diseases.

Main Methods:

  • Analysis of TACE structure and function, including its metalloprotease domain.
  • Investigating substrate binding sites, potentially distal to the active site.
  • Studying the role of membrane-anchoring for enzyme-substrate interactions.
  • Examining the impact of cell activators and intracellular kinase cascades on TACE-mediated shedding.

Main Results:

  • TACE recognizes and cleaves membrane-bound precursors, releasing soluble factors like TNF-alpha.
  • Substrate recognition may involve domains distant from the catalytic site, and membrane anchoring is often required.
  • Cell activation enhances shedding rates, mediated by intracellular kinase pathways, though the precise link remains unclear.

Conclusions:

  • TACE plays a critical role in releasing bioactive soluble proteins through ectodomain shedding.
  • Further research into TACE substrate specificity and regulatory pathways is essential for therapeutic targeting.
  • Inhibiting TACE activity holds promise for treating inflammatory conditions.

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