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lüll Assembly, structure, and function of the 26S proteasome Bedford L; Paine S; Sheppard PW; Mayer RJ; Roelofs JTrends Cell Biol 2010[Jul]; 20 (7): 391-401The 26S proteasome is a large multiprotein complex involved in the regulated degradation of ubiquitinated proteins in the cell. The 26S proteasome has been shown to control an increasing number of essential biochemical mechanisms of the cellular lifecycle including DNA synthesis, repair, transcription, translation, and cell signal transduction. Concurrently, it is increasingly seen that malfunction of the ubiquitin proteasome system contributes to the pathogenesis of disease. The recent identification of four molecular chaperones, in addition to five previously identified chaperones, have provided mechanistic insight into how this cellular megastructure is assembled in the cell. These data, together with new insights into the structure and function of the proteasome, provide a much better understanding of this complex protease.|Animals[MESH]|Cell Physiological Phenomena[MESH]|Humans[MESH]|Molecular Chaperones/analysis[MESH]|Proteasome Endopeptidase Complex/*chemistry/*metabolism[MESH]|Ubiquitinated Proteins/metabolism[MESH] |