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The Proteasome Structure01:17

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The ubiquitin-proteasome pathway is a well-known mechanism utilized by eukaryotic cells to remove cytoplasmic proteins that are misfolded, damaged, or no longer needed. In this pathway, the protein that needs to be eliminated undergoes a process called ubiquitination, where a chain of ubiquitin molecules is attached to the 48th lysine residue of the target protein. This ubiquitin modification helps the proteasome distinguish between a target protein and a healthy protein.
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Eukaryotic cells can degrade proteins through several pathways. One of the most important among these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
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Targeting Cysteine Thiols for in Vitro Site-specific Glycosylation of Recombinant Proteins
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The cysteine proteome.

Young-Mi Go1, Joshua D Chandler1, Dean P Jones1

  • 1Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA 30322, USA.

Free Radical Biology & Medicine
|April 7, 2015
PubMed
Summary
This summary is machine-generated.

The cysteine proteome, crucial for adapting to environmental exposures, features diverse modifications. Atlases of these cysteine modifications are needed for systems biology and developing redox-based therapeutics.

Keywords:
Cysteine proteomeFree radicalsFunctional networkRedox proteomeRedox signalingThiol

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Area of Science:

  • Biochemistry
  • Proteomics
  • Systems Biology

Background:

  • The cysteine proteome acts as a key interface between the genome and exposome.
  • Cysteine's thiol group undergoes various biological modifications, influencing protein structure and reactivity.
  • Existing knowledge provides a basis for developing integrative models of cysteine proteome regulation.

Purpose of the Study:

  • To highlight the necessity of atlases for cysteine modifications.
  • To advance systems biology models of the cysteine proteome.
  • To facilitate integrative studies linking the cysteine proteome with other omics platforms.

Main Methods:

  • Review of current knowledge on cysteine modifications and redox signaling.
  • Conceptual framework development for cysteine proteome atlases.
  • Integration of cysteine proteome data with imaging and omics platforms.

Main Results:

  • Cysteine modifications are critical for biological switching and adaptation.
  • Detailed understanding of redox signaling enables network structure discrimination.
  • Atlases of cysteine modifications are essential for systems biology approaches.

Conclusions:

  • Atlases of cysteine modifications are vital for developing comprehensive systems biology models.
  • These atlases will support integrative studies and the development of redox-based therapeutics.
  • The cysteine proteome is positioned as a complement to the quantitative proteome in the omics continuum.