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          Institute: MPI für Biochemie     Collection: Structural Biology (W. Baumeister)     Display Documents

ID: 318324.0, MPI für Biochemie / Structural Biology (W. Baumeister)
A subcomplex of the proteasome regulatory particle required for ubiquitin-conjugate degradation and related to the cop9-signalosome and eif3
Authors:Glickman, M. H.; Rubin, D. M.; Coux, O.; Wefes, I.; Pfeifer, G.; Cjeka, Z.; Baumeister, W.; Fried, V. A.; Finley, D.
Date of Publication (YYYY-MM-DD):1998-09-04
Title of Journal:Cell
Issue / Number:5
Start Page:615
End Page:623
Audience:Not Specified
Abstract / Description:The proteasome consists of a 20S proteolytic core particle (CP) and a 19S regulatory particle (RP), which selects ubiquitinated substrates for translocation into the CP. An eight-subunit subcomplex of the RP, the lid, can be dissociated from proteasomes prepared from a deletion mutant for Rpn10, an RP subunit. A second subcomplex, the base, contains all six proteasomal ATPases and links the RP to the CP. The base is sufficient to activate the CP for degradation of peptides or a nonubiquitinated protein, whereas the lid is required for ubiquitin-dependent degradation. By electron microscopy, the base and the lid correspond to the proximal and distal masses of the RP, respectively. The lid subunits share sequence motifs with components of the COPS/signalosome complex and eIF3, suggesting that these functionally diverse particles have a common evolutionary ancestry. [References: 47]
Free Keywords:Initiation-factor eif3; 20s proteasome; Multicatalytic protease; Dependent proteases; 20-s proteasome; 11-s regulator; Subunits; Complex; Yeast; Purification.; Cell & developmental biology.
External Publication Status:published
Document Type:Article
Communicated by:Anton Hillebrand
Affiliations:MPI für Biochemie/Structural Biology (W. Baumeister)/
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