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Regulated Protein Degradation02:58

Regulated Protein Degradation

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It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
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Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
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Evaluation of Substrate Ubiquitylation by E3 Ubiquitin-ligase in Mammalian Cell Lysates
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Systematic approaches to identify E3 ligase substrates.

Mary Iconomou1,2, Darren N Saunders3

  • 1The Kinghorn Cancer Centre, Garvan Institute of Medical Research, Darlinghurst 2010, Australia.

The Biochemical Journal
|November 12, 2016
PubMed
Summary
This summary is machine-generated.

Protein ubiquitylation, regulated by E3 ligases in the ubiquitin proteasome system (UPS), impacts crucial cell processes. New methods are rapidly advancing UPS target identification for drug development and disease understanding.

Keywords:
cancerfunctional genomicsneurodegenerationproteomicsproteostasisubiquitin

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • Protein ubiquitylation is a key post-translational modification regulating diverse cellular functions.
  • The ubiquitin proteasome system (UPS) controls protein degradation, cell cycle, DNA repair, and transcription.
  • E3 ligases are crucial for substrate specificity within the UPS, but many remain poorly characterized.

Purpose of the Study:

  • To highlight systematic approaches for identifying and validating UPS targets.
  • To discuss advancements in understanding UPS biochemistry and biology.
  • To explore the role of UPS in drug development and disease processes.

Main Methods:

  • Systematic target identification strategies.
  • Validation of ubiquitin proteasome system targets.
  • Integration of novel tools and model systems.

Main Results:

  • Advances in identifying and validating E3 ligase substrates.
  • Improved understanding of the ubiquitin proteasome system's biochemical and biological roles.
  • Identification of UPS as a target for drug development.

Conclusions:

  • Systematic approaches are crucial for characterizing E3 ligases and their substrates.
  • Novel methods are accelerating UPS research.
  • Targeting the UPS holds promise for treating various diseases.