Evidence for a NIMA-like mitotic pathway in vertebrate cells

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NIMA is essential for entry into mitosis in Aspergillus nidulans. To examine whether there is a NIMA-like pathway in other eukaryotic cell cycles, we expressed NIMA and its dominant negative mutants in two different eukaryotic systems. In Xenopus oocytes, NIMA induced germinal vesicle breakdown without activating Mos, CDC2, or MAP kinase. In HeLa cells, NIMA induced premature mitotic events without activating CDC2, whereas the mutants caused a specific G2 arrest but did not block mutant CDC2T14AY15F-induced premature entry into mitosis. A sequence essential for both these phenotypes was mapped to a region of ∼100 amino acids lying just after the catalytic domain of NIMA that shows a significant similarity to protein interaction domains in other proteins. These results provide evidence for the existence of a NIMA-like mitotic pathway in vertebrate cells. © 1995.




Lu, K. P., & Hunter, T. (1995, May 5). Evidence for a NIMA-like mitotic pathway in vertebrate cells. Cell. https://doi.org/10.1016/0092-8674(95)90394-1

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