Sources:
The best article: "The Logic of the 26S Proteasome" (2018) - Collins and Goldberg
"E2 enzymes: more than just middle men" (2016) - Stewart et al.
"ATP-dependent steps in the binding of ubiquitin conjugates to the 26S proteasome that commit to degradation" (2010) - Peth et al.
"The Ubiquitin-Proteasome Pathway and Proteasome Inhibitors" (2001) - Myung et al.
"Linkage between ATP consumption and Mechanical unfolding during the Protein Processing Reactions of an AAA+ Degradation Machine" (2003) - Kenniston et al.
"JB Special Review - Recent Topics in Ubiquitin-Proteasome System and Autophagy" (2017) - Saeki
"Complete Subunit Architecture of the Proteasome Regulatory Particle" (2012) - Lander et al.
"AAA Proteins and the Origins of Proteasomal Protein Degradation" (2011) - Ammelburg
"Proteasomal AAA-ATP-ases: Structure and Function" (2012) - Bar-Nun and Glickman
"Proteasome System of Protein Degradation and Processing" (2009) - Sorokin et al.
Molecular Biology of the Cell (6th Edition) - Alberts, Johnson, Lewis, Morgan, Raff, Roberts, Walter
3D Proteasome Model from: https://www.turbosquid.com/FullPreview/Index.cfm/ID/936998