Reference: Juang YL, et al. (1997) APC-mediated proteolysis of Ase1 and the morphogenesis of the mitotic spindle. Science 275(5304):1311-4

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Abstract


The molecular mechanisms that link cell-cycle controls to the mitotic apparatus are poorly understood. A component of the Saccharomyces cerevisiae spindle, Ase1, was observed to undergo cell cycle-specific degradation mediated by the cyclosome, or anaphase promoting complex (APC). Ase1 was degraded when cells exited from mitosis and entered G1. Inappropriate expression of stable Ase1 during G1 produced a spindle defect that is sensed by the spindle assembly checkpoint. In addition, loss of ASE1 function destabilized telophase spindles, and expression of a nondegradable Ase1 mutant delayed spindle disassembly. APC-mediated proteolysis therefore appears to regulate both spindle assembly and disassembly.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't
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Juang YL, Huang J, Peters JM, McLaughlin ME, Tai CY, Pellman D
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