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Updated: Jun 15, 2026

In-vitro Reconstitution of Bacterial Ubiquitination and VCP/p97-mediated Elimination
Published on: January 2, 2026
Prokaryotic ubiquitin-like protein provides a two-part degron to Mycobacterium proteasome substrates
Kristin E Burns1, Michael J Pearce, K Heran Darwin
1New York University School of Medicine, Department of Microbiology, 550 First Avenue, MSB 236, New York, NY 10016, USA.
Abstract:
Prokaryotic ubiquitin-like protein (Pup) is a posttranslational modifier that targets proteins for degradation by the mycobacterial proteasome. We show that the disordered amino terminus of Pup is required for degradation, while the helical carboxyl terminus mediates its attachment to proteins. Thus, Pup has distinct regions that either interact with pupylation enzymes or initiate proteasomal degradation.
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