Department of Biology, University of Massachusetts, Amherst, Morrill Science Center, Amherst, MA 01003, United States.
Semin Cell Dev Biol. 2010 May;21(3):255-9. doi: 10.1016/j.semcdb.2010.01.019. Epub 2010 Jan 28.
In all eukaryotic cells, molecular motor proteins play essential roles in spindle assembly and function. The homotetrameric kinesin-5 motors in particular generate outward forces that establish and maintain spindle bipolarity and contribute to microtubule flux. Cell-cycle dependent phosphorylation of kinesin-5 motors regulates their localization to the mitotic spindle. Analysis of live cells further shows that kinesin-5 motors are highly dynamic in the spindle. Understanding the interactions of kinesin-5 motors with microtubules and other spindle proteins is likely to broaden the documented roles of kinesin-5 motors during cell division.
在所有真核细胞中,分子马达蛋白在纺锤体的组装和功能中起着至关重要的作用。特别是同源四聚体的驱动蛋白-5 马达产生向外的力,从而建立和维持纺锤体的双极性,并有助于微管流。细胞周期依赖性的驱动蛋白-5 马达的磷酸化调节其向有丝分裂纺锤体的定位。对活细胞的进一步分析表明,驱动蛋白-5 马达在纺锤体中具有高度的动态性。了解驱动蛋白-5 马达与微管和其他纺锤体蛋白的相互作用,可能会扩大驱动蛋白-5 马达在细胞分裂过程中的已有作用。