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

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S. typhimurium encodes an activator of Rho GTPases that induces membrane ruffling and nuclear responses in host cells.

S. typhimurium stimulates signaling pathways leading to membrane ruffling, actin cytoskeleton rearrangements, and nuclear responses. The stimulation requires a protein secretion system (type III) that translocates bacterial proteins into the host cell. We show that SopE, a substrate of this secretion system, stimulates cytoskeletal reorganization and JNK activation in a CDC42- and Rac-1-dependent manner. A lambda gt11 cDNA library screen for proteins that interact with SopE identified Rac-1 and CDC42. Furthermore, purified SopE was shown to stimulate GDP/GTP nucleotide exchange in several Rho GTPases in vitro, including Rac-1 and CDC42. These findings establish a paradigm for microbial stimulation of cellular responses in which the pathogen induces signaling events by directly engaging the signaling machinery within the host cell.[1]

References

  1. S. typhimurium encodes an activator of Rho GTPases that induces membrane ruffling and nuclear responses in host cells. Hardt, W.D., Chen, L.M., Schuebel, K.E., Bustelo, X.R., Galán, J.E. Cell (1998) [Pubmed]
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