Xenopus Polo-like kinase Plx1: a multifunctional mitotic kinase
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چکیده
منابع مشابه
Mitotic effects of a constitutively active mutant of the Xenopus polo-like kinase Plx1.
During mitosis the Xenopus polo-like kinase 1 (Plx1) plays key roles in the activation of Cdc25C, in spindle assembly, and in cyclin B degradation. Previous work has shown that the activation of Plx1 requires phosphorylation on serine and threonine residues. In the present work, we demonstrate that replacement of Ser-128 or Thr-201 with a negatively charged aspartic acid residue (S128D or T201D...
متن کاملXenopus polo-like kinase Plx1 regulates XErp1, a novel inhibitor of APC/C activity.
Metaphase-to-anaphase transition is a fundamental step in cell cycle progression where duplicated sister-chromatids segregate to the future daughter cells. The anaphase-promoting complex/cyclosome (APC/C) is a highly regulated ubiquitin-ligase that triggers anaphase onset and mitotic exit by targeting securin and mitotic cyclins for destruction. It was previously shown that the Xenopus polo-lik...
متن کاملThe polo-like kinase Plx1 is required for M phase exit and destruction of mitotic regulators in Xenopus egg extracts.
Polo-like kinases (Plks), named after the Drosophila gene product polo, have been implicated in the regulation of multiple aspects of mitotic progression, including the activation of the Cdc25 phosphatase, bipolar spindle formation and cytokinesis. Genetic analyses performed in yeast and Drosophila suggest a function for Plks at late stages of mitosis, but biochemical data to support such a fun...
متن کاملThe Polo-like kinase Plx1 interacts with and inhibits Myt1 after fertilization of Xenopus eggs.
During the meiotic cell cycle in Xenopus oocytes, p90(rsk), the downstream kinase of the Mos-MAPK pathway, interacts with and inhibits the Cdc2 inhibitory kinase Myt1. However, p90(rsk) is inactivated after fertilization due to the degradation of Mos. Here we show that the Polo-like kinase Plx1, instead of p90(rsk), interacts with and inhibits Myt1 after fertilization of Xenopus eggs. At the M ...
متن کاملThe mitotic roles of Polo-like kinase.
The Polo-like protein kinases (Plks) are a conserved family of enzymes that play a variety of roles in the passage of cells through M phase (for reviews see Glover et al., 1998; Nigg, 1998). Named after the Drosophila polo gene originally identified through a recessive maternal effect lethal mutation, conserved Plk homologues have been identified in yeast, Xenopus, C. elegans and mammals. The i...
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ژورنال
عنوان ژورنال: Oncogene
سال: 2005
ISSN: 0950-9232,1476-5594
DOI: 10.1038/sj.onc.1208220