Structural rearrangements of meiotic spindles during the transition from metaphase to anaphase can be controlled by local changes of microtubule dynamics, such as nucleation and/or turnover, and that katanin promotes microtubule turnover by severing microtubules near the chromosomes.
Microtubule binding by the Spindle and Kinetochore Associated (Ska) complex concentrates protein phosphatase 1 at metaphase kinetochores to overcome the spindle checkpoint thus driving anaphase onset and mitotic exit.
Live-cell imaging shows that the contractile acto-myosin network on the nuclear envelope remnant positions chromosomes in early mitosis to ensure efficient and correct interactions between chromosomes and the mitotic spindle.
Building on previous work (Syrjänen, Pellegrini, & Davies, 2014), it is shown that SYCP3 contributes to the architecture of meiotic chromosomes through local bridging interactions that result in large-scale compaction of the chromosome axis.
The Par complex controls spindle orientation during asymmetric cell division by phosphorylating the tumor suppressor Discs large, overcoming its autoinhibited state, and allowing it to bind the microtubule-binding protein GukHolder.