Cell
Volume 45, Issue 1, 11 April 1986, Pages 145-153
Journal home page for Cell

Article
cdc25+ functions as an inducer in the mitotic control of fission yeast

https://doi.org/10.1016/0092-8674(86)90546-5Get rights and content

Abstract

In the fission yeast S. pombe the cdc25+ gene function is required to initiate mitosis. We have cloned the cdc25+ gene and have found that increased cdc25+ expression causes mitosis to initiate at a reduced cell size. This shows that cdc25+ functions as a dosage-dependent inducer in mitotic control, the first such mitotic control element to be specifically identified. DNA sequencing of the cdc25+ gene has shown that it can encode a protein of MW 67,000. Evidence is described showing that cdc25+ functions to counteract the activity of the mitotic inhibitor wee1+, and indicating that both mitotic control elements act independently to regulate the initiation of mitosis.

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