Journal
TRENDS IN PLANT SCIENCE
Volume 15, Issue 7, Pages 375-386Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tplants.2010.03.004
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Funding
- NSC [95-2311-B-001-045-MY3]
- Academia Sinica, Taipei, Taiwan [AS-94-TP-B08, AS-AS-97-TP-B03]
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Ubiquitin/26S proteasome-mediated proteolysis controls the half-life of numerous critical regulatory proteins and is an intimate regulatory component for nearly all aspects of cellular processes. In addition to ubiquitin conjugation, an additional level of substrate specificity is regulated at the step of proteasomal recognition of ubiquitylated substrates, which serves as an important mechanistic and regulatory component to connect the substrate from the conjugation machinery to the 26S proteasome. In this review, we discuss current knowledge and future challenges relevant to understanding the mechanism, regulation, functions and substrate specificity of proteasomal recognition mediated by a multitude of ubiquitin receptors. The mechanistic details of major recognition pathways for ubiquitylated substrates are clearly divergent within and across species, which implies functional differentiation.
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