The catalytic activity of Ubp6 enhances maturation of the proteasomal regulatory particle.
The 26S proteasome is a 2.5 MDa macromolecular machine responsible for targeted protein degradation. Recently, four chaperones were identified that promote the assembly of the 19S regulatory particle (RP). Here, we probe the dynamic architecture of the proteasome by applying quantitative proteomics and mass spectrometry (MS) of intact complexes to provide a detailed characterization of how Ubp6 assists this assembly process. Our MS data demonstrate stoichiometric binding of chaperones and Ubp...Expand abstract
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