Reference: Clémenson C and Marsolier-Kergoat MC (2006) The spindle assembly checkpoint regulates the phosphorylation state of a subset of DNA checkpoint proteins in Saccharomyces cerevisiae. Mol Cell Biol 26(24):9149-61

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Abstract


The DNA and the spindle assembly checkpoints play key roles in maintaining genomic integrity by coordinating cell responses to DNA lesions and spindle dysfunctions, respectively. These two surveillance pathways seem to operate mostly independently of one another, and little is known about their potential physiological connections. Here, we show that in Saccharomyces cerevisiae, the activation of the spindle assembly checkpoint triggers phosphorylation changes in two components of the DNA checkpoint, Rad53 and Rad9. These modifications are independent of the other DNA checkpoint proteins and are abolished in spindle checkpoint-defective mutants, hinting at specific functions for Rad53 and Rad9 in the spindle damage response. Moreover, we found that after UV irradiation, Rad9 phosphorylation is altered and Rad53 inactivation is accelerated when the spindle checkpoint is activated, which suggests the implication of the spindle checkpoint in the regulation of the DNA damage response.

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Journal Article | Research Support, Non-U.S. Gov't
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Clémenson C, Marsolier-Kergoat MC
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