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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Phosphorylation of the fused protein kinase in response to signaling from hedgehog.

The hedgehog gene (hh) of Drosophila melanogaster exerts both short- and long-range effects on cell patterning during development. The product of hedgehog is a secreted protein that apparently acts by triggering an intra-cellular signaling pathway, but little is known about the details of that pathway. The Drosophila gene fused (fu) encodes a serine/threonine-protein kinase that genetic experiments have implicated in signaling initiated by hedgehog. Here we report that the fused protein is phosphorylated during the course of Drosophila embryogenesis, as a result of hedgehog activity. In cell culture, phosphorylation of fused protein occurs in response to the biologically active form of hedgehog and cannot be blocked by activation of protein kinase A, which is thought to be an antagonist of signaling from hedgehog. These results suggest that fused and protein kinase A function downstream of hedgehog but in parallel pathways that eventually converge distal to fused. The reconstruction of signaling from hedgehog in cell culture should provide further access to the mechanisms by which hedgehog acts.[1]

References

  1. Phosphorylation of the fused protein kinase in response to signaling from hedgehog. Thérond, P.P., Knight, J.D., Kornberg, T.B., Bishop, J.M. Proc. Natl. Acad. Sci. U.S.A. (1996) [Pubmed]
 
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