title: Chromosome passenger complexes control anaphase duration and spindle elongation via a kinesin-5 brake.
abstract: During mitosis, chromosome passenger complexes (CPCs) exhibit a well-conserved association with the anaphase spindle and have been implicated in spindle stability. However, their precise effect on the spindle is not clear. In this paper, we show, in budding yeast, that a CPC consisting of CBF3, Bir1, and Sli15, but not Ipl1, is required for normal spindle elongation. CPC mutants slow spindle elongation through the action of the bipolar kinesins Cin8 and Kip1. The same CPC mutants that slow spindle elongation also result in the enrichment of Cin8 and Kip1 at the spindle midzone. Together, these findings argue that CPCs function to organize the spindle midzone and potentially switch motors between force generators and molecular brakes. We also find that slowing spindle elongation delays the mitotic exit network (MEN)-dependent release of Cdc14, thus delaying spindle breakdown until a minimal spindle size is reached. We propose that these CPC- and MEN-dependent mechanisms are important for coordinating chromosome segregation with spindle breakdown and mitotic exit.
authors.affiliation: Department of Molecular and Cellular Biology, University of California, Davis, Davis, CA 95616, USA.
authors.forename: Daniel K
authors.initials: DK
authors.lastname: Rozelle
authors.forename: Scott D
authors.initials: SD
authors.lastname: Hansen
authors.forename: Kenneth B
authors.initials: KB
authors.lastname: Kaplan
mesh_terms: D000705:Anaphase; D002352:Carrier Proteins / Q000235:genetics / Q000378:metabolism; D018797:Cell Cycle Proteins / Q000235:genetics / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism; D016547:Kinesins / Q000235:genetics / Q000378:metabolism*; D018386:Kinetochores / Q000378:metabolism; D008869:Microtubule-Associated Proteins / Q000235:genetics / Q000378:metabolism*; D020409:Molecular Motor Proteins / Q000235:genetics / Q000378:metabolism*; D017027:Protein Tyrosine Phosphatases / Q000235:genetics / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000235:genetics / Q000378:metabolism*; D029701:Saccharomyces cerevisiae Proteins / Q000235:genetics / Q000378:metabolism*; D008941:Spindle Apparatus
chemical_list: C546593:Bir1 protein, S cerevisiae; C081071:CBF2 protein, S cerevisiae; C090459:CDC1 protein, S cerevisiae; C074860:CDC14 protein, S cerevisiae; C075342:CIN8 protein, S cerevisiae; D002352:Carrier Proteins; D018797:Cell Cycle Proteins; D004268:DNA-Binding Proteins; C431747:KIP1 protein, S cerevisiae; D008869:Microtubule-Associated Proteins; D020409:Molecular Motor Proteins; D029701:Saccharomyces cerevisiae Proteins; C480084:Sli15 protein, S cerevisiae; D017027:Protein Tyrosine Phosphatases; D016547:Kinesins