The structure and function of deubiquitinases: lessons from budding yeast

Area of Science:

• Biochemistry
• Molecular Biology
• Cell Biology

Background:

• Protein ubiquitination is a vital post-translational modification regulating eukaryotic cellular processes.
• Ubiquitin (Ub) signaling specificity relies on diverse mono- and polyubiquitination events with varied chain architectures.
• Deubiquitinases (DUBs) are essential enzymes that reverse or modify Ub signals with high specificity.

Purpose of the Study:

• To review the multifaceted functions and regulatory mechanisms of DUBs.
• To provide a framework for understanding DUB biology, with a focus on insights from budding yeast.
• To highlight the integral role of DUBs in Ub signaling and cellular processes.

Main Methods:

• Literature review focusing on DUBs and ubiquitination.
• Analysis of DUB function and regulation in eukaryotic cells.
• Case study using budding yeast (Saccharomyces cerevisiae) as a model organism.

Main Results:

• DUBs play sophisticated roles in editing Ub signals, impacting DNA repair, gene expression, protein quality control, and organellar integrity.
• The specificity of Ub signaling is determined by the variety of ubiquitination events and DUB activities.
• Budding yeast provides valuable insights into fundamental DUB biology and regulation.

Conclusions:

• DUBs are critical regulators of Ub signaling, essential for numerous cellular functions.
• Understanding DUBs in model organisms like yeast is key to deciphering complex Ub-mediated cellular processes.
• This review offers a comprehensive framework for the study of DUBs.