The protein kinase Kin4 inhibits exit from mitosis in response to spindle position defects.

Accurate nuclear position is essential for each daughter cell to receive one DNA complement. In budding yeast, a surveillance mechanism known as the spindle position checkpoint ensures that exit from mitosis only occurs when the anaphase nucleus is positioned along the mother-bud axis. We identified the protein kinase Kin4 as ...
a component of the spindle position checkpoint. KIN4 prevents exit from mitosis in cells with mispositioned nuclei by inhibiting the mitotic exit network (MEN), a GTPase signaling cascade that promotes exit from mitosis. Kin4 is active in cells with mispositioned nuclei and predominantly localizes to mother cells, where it is ideally situated to inhibit MEN signaling at spindle pole bodies (SPBs) when anaphase spindle elongation occurs within the mother cell.
Mesh Terms:
Anaphase, Cell Cycle Proteins, Cytoskeletal Proteins, Mitosis, Mitotic Spindle Apparatus, Protein Kinases, Protein Tyrosine Phosphatases, Saccharomyces cerevisiae, Saccharomyces cerevisiae Proteins, Time Factors
Mol. Cell
Date: Jul. 22, 2005
Download Curated Data For This Publication
20973
Switch View:
  • Interactions 7