Drosophila female meiosis and embryonic syncytial mitosis use specialized Cks and CDC20 proteins for cyclin destruction

Cell Cycle. 2005 Oct;4(10):1332-4. doi: 10.4161/cc.4.10.2088. Epub 2005 Oct 10.


Female meiosis and the rapid mitotic cycle of early embryos are two non-canonical cell cycles that occur sequentially in the same cell, the egg, and utilize the same pool of cell cycle proteins. Using a genetic approach to identify genes that are specifically required for these cell cycles in Drosophila, we found that a Drosophila Cks gene, Cks30A is required for spindle assembly and anaphase progression in both female meiosis and in the syncytial embryo. Cks30A interacts with Cdk1 to target cyclin A for destruction in the female germline, possibly through the activation of a novel germline specific CDC20 protein, Cortex. These results indicate that anaphase progression in female meiosis and the early embryo are under unique control in Drosophila.

MeSH terms

  • Animals
  • Cdc20 Proteins
  • Cell Cycle Proteins / genetics
  • Cell Cycle Proteins / metabolism*
  • Cyclin-Dependent Kinases / genetics
  • Cyclin-Dependent Kinases / metabolism*
  • Cyclins / metabolism*
  • Drosophila Proteins / genetics
  • Drosophila Proteins / metabolism
  • Drosophila melanogaster / cytology*
  • Drosophila melanogaster / embryology
  • Drosophila melanogaster / genetics
  • Drosophila melanogaster / metabolism*
  • Female
  • Meiosis*
  • Mitosis*


  • Cdc20 Proteins
  • Cell Cycle Proteins
  • Cyclins
  • Drosophila Proteins
  • cort protein, Drosophila
  • Cks30A protein, Drosophila
  • Cyclin-Dependent Kinases