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Genes Dev. 1996 Feb 1;10(3):261-71.

A novel, mitogen-activated nuclear kinase is related to a Drosophila developmental regulator.

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  • 1Howard Hughes Medical Institute, University of Massachusetts Medical Center, Worcester 01605 USA.


Although the ultimate targets of many signal transduction pathways are nuclear transcription factors, the vast majority of known protein kinases are cytosolic. Here, we report on a novel human kinase that is present exclusively in the nucleus. Kinase activity is increased upon cellular proliferation and is markedly elevated in patients with acute and chronic lymphocytic leukemias. We have identified a human gene that encodes this nuclear kinase and find that it is closely related to Drosophila female sterile homeotic (fsh), a developmental regulator with no known biochemical activity. Collectively, these results suggest that this nuclear kinase is a component of a signal transduction pathway that plays a role in Drosophila development and human growth control.

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