title: UPS shipping and handling.
abstract: It is now clear that the two broad sets of reactions in the ubiquitin-proteasome system (UPS), the conjugative and degradative steps, are intricately coupled in vivo and that there are numerous factors that aid in the handling and delivery of ubiquitylated proteins to the proteasome. The report from Richly et al (2005)[this issue of Cell]) suggests how several of the known players in this process might work together in guiding and delivering some substrates to their final destinations.
authors.affiliation: Institute for Cellular and Molecular Biology, Section of Molecular Genetics and Microbiology, University of Texas at Austin, Austin, TX 78712, USA.
authors.forename: Jon M
authors.initials: JM
authors.lastname: Huibregtse
mesh_terms: D004721:Endoplasmic Reticulum / Q000378:metabolism; D009097:Multienzyme Complexes / Q000378:metabolism; D046988:Proteasome Endopeptidase Complex / Q000378:metabolism*; D017510:Protein Folding; D025801:Ubiquitin / Q000378:metabolism*
chemical_list: D009097:Multienzyme Complexes; D025801:Ubiquitin; D046988:Proteasome Endopeptidase Complex