Structures of the 26S proteasome in complex with the Hsp70 cochaperone Bag1 reveal a novel mechanism of ubiquitin-independent proteasomal degradation
Moisés Maestro-López, Tat Cheung Cheng, Jimena Muntaner, Margarita Menéndez, Melissa Alonso, Andreas Schweitzer, Jorge Cuéllar, José Valpuesta, Eri Sakata
This study presents cryo-EM structures of the Bag1-bound 26S proteasome, revealing a mechanism for ubiquitin-independent proteasomal degradation through conformational changes in the 19S regulatory particle.
bioRxiv · Jan 22, 2025 · PreprintMolecular Biology