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Activation of the nuclear factor-kappaB by Rho, CDC42, and Rac-1 proteins

Perona, R, Montaner, S, Saniger, L, Sánchez-Pérez, I, Bravo, R, Lacal, J C·1997·Genes & Development
DOI 10.1101/gad.11.4.463
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Abstract

The Rho family of small GTPases are critical elements involved in the regulation of signal transduction cascades from extracellular stimuli to the cell nucleus, including the JNK/SAPK signaling pathway, the c-fos serum response factor, and the p70 S6 kinase. Here we report a novel signaling pathway activated by the Rho proteins that may be responsible for their biological activities, including cytoskeleton organization, transformation, apoptosis, and metastasis. The human RhoA, CDC42, and Rac-1 proteins efficiently induce the transcriptional activity of nuclear factor kappaB (NF-kappaB) by a mechanism that involves phosphorylation of Ikappa Balpha and translocation of p50/p50 and p50/p65 dimers to the nucleus, but independent of the Ras GTPase and the Raf-1 kinase. We also show that activation of NF-kappaB by TNFalpha depends on CDC42 and RhoA, but not Rac-1 proteins, because this activity is drastically inhibited by their respective dominant-negative mutants. In contrast, activation of NF-kappaB by UV light was not affected by Rho, CDC42, or Rac-1 dominant-negative mutants. Thus, members of the Rho family of GTPases are involved specifically in the regulation of NF-kappaB-dependent transcription.

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Cited by

Metadata

Authors
Perona, R., Montaner, S., Saniger, L., Sánchez-Pérez, I., Bravo, R., & Lacal, J. C.
Venue
Genes & Development
Publisher
Cold Spring Harbor Laboratory
Published
1997-02-15
Volume
11
Issue
4
Pages
463-475
ISSN
  • 0890-9369
  • 1549-5477
DOI
10.1101/gad.11.4.463
Cited by
519
References
2
Language
en

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