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Transformation of Mammalian Cells by Constitutively Active MAP Kinase Kinase

Mansour, Sam J., Matten, Wayne T., Hermann, April S., Candia, Julian M., Rong, Sing, Fukasawa, Kenji, Vande Woude, George F., Ahn, Natalie G.·1994·Science

Abstract

Mitogen-activated protein (MAP) kinase kinase (MAPKK) activates MAP kinase in a signal transduction pathway that mediates cellular responses to growth and differentiation factors. Oncogenes such as ras , src , raf , and mos have been proposed to transform cells by prolonging the activated state of MAPKK and of components downstream in the signaling pathway. To test this hypothesis, constitutively active MAPKK mutants were designed that had basal activities up to 400 times greater than that of the unphosphorylated wild-type kinase. Expression of these mutants in mammalian cells activated AP-1-regulated transcription. The cells formed transformed foci, grew efficiently in soft agar, and were highly tumorigenic in nude mice. These findings indicate that constitutive activation of MAPKK is sufficient to promote cell transformation.

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Authors
Mansour, S. J., Matten, W. T., Hermann, A. S., Candia, J. M., Rong, S., Fukasawa, K., Vande Woude, G. F., & Ahn, N. G.
Venue
Science
Published
1994-08-12
Volume
265
Issue
5174
Pages
966-970
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2001521752
Cited by
1,353
References
0
FWCI
30.52
Type
journal article
Language
en
Open access
closed

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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