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Glycosylation, the most common post-translational modification for proteins, serves diverse functions. Adding sugars to proteins makes the proteins more resistant to proteolytic digestion. Glycosylated proteins can act as markers and receptors to promote cell-cell adhesion. Additionally, they have many essential quality control functions in the cell, such as correct protein folding and facilitating transport of misfolded proteins to the cytosol, which can be degraded.
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Related Experiment Video

Updated: Mar 30, 2026

Exploring the Arginine Methylome by Nuclear Magnetic Resonance Spectroscopy
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Expanding Biological Roles of Post-translational Arginylation.

Dominic Scopelliti1, Changfeng Deng2, Benjamin A Garcia3

  • 1Department of Biochemistry & Molecular Biophysics, Washington University School of Medicine, St. Louis, MO 63110. dominics@wustl.edu.

Chimia
|March 28, 2026
PubMed
Summary

Protein arginylation, a modification by arginyl-tRNA transferase, regulates more than just protein degradation. This process impacts protein interactions, stability, and cellular functions, acting as a key global regulator.

Keywords:
ArginylationBiologyDegradationNon-degradative functionsPost-translational modification

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • Protein arginylation is a post-translational modification catalyzed by arginyl-tRNA transferase.
  • Historically linked to protein degradation pathways, its role is increasingly recognized as broader.

Purpose of the Study:

  • To review the established and emerging roles of protein arginylation.
  • To highlight its functions beyond proteolysis in cellular regulation.

Main Methods:

  • Literature review of studies on protein arginylation.
  • Analysis of its involvement in Ubiquitin-Proteasome System and Autophagy-Lysosome System.
  • Examination of non-degradative functions and crosstalk with other PTMs.

Main Results:

  • Arginylation is involved in both targeted protein degradation and non-degradative cellular processes.
  • It modulates protein-protein interactions, complex assembly, and protein stability.
  • Arginylation exhibits context-dependent effects, influencing protein stability and function simultaneously.

Conclusions:

  • Protein arginylation is a dynamic and versatile regulatory mechanism.
  • Its functions extend significantly beyond proteolysis.
  • Arginylation acts as a global regulator of diverse cellular activities.