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Updated: Jun 2, 2026

In Vitro Analysis of E3 Ubiquitin Ligase Function
Published on: May 14, 2021
Processive ubiquitin chain formation by the anaphase-promoting complex
Hermann-Josef Meyer1, Michael Rape
1University of California at Berkeley, Department of Molecular and Cell Biology, Berkeley, CA 94720-3202, United States.
Abstract:
Progression through mitosis requires the sequential ubiquitination of cell cycle regulators by the anaphase-promoting complex, resulting in their proteasomal degradation. Although several mechanisms contribute to APC/C regulation during mitosis, the APC/C is able to discriminate between its many substrates by exploiting differences in the processivity of ubiquitin chain assembly. Here, we discuss how the APC/C achieves processive ubiquitin chain formation to trigger the sequential degradation of cell cycle regulators during mitosis.
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