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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Myosin V orientates the mitotic spindle in yeast.

Coordination of spindle orientation with the axis of cell division is an essential process in all eukaryotes. In addition to ensuring accurate chromosomal segregation, proper spindle orientation also establishes differential cell fates and proper morphogenesis. In both animal and yeast cells, this process is dependent on cytoplasmic microtubules interacting with the cortical actin-based cytoskeleton, although the motive force was unknown. Here we show that yeast Myo2, a myosin V that translocates along polarized actin cables into the bud, orientates the spindle early in the cell cycle by binding and polarizing the microtubule-associated protein Kar9 (refs 7-9). The tail domain of Myo2 that binds Kar9 also interacts with secretory vesicles and vacuolar elements, making it a pivotal component of yeast cell polarization.[1]


  1. Myosin V orientates the mitotic spindle in yeast. Yin, H., Pruyne, D., Huffaker, T.C., Bretscher, A. Nature (2000) [Pubmed]
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