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. 1997 Aug 1;277(5326):693-6.
doi: 10.1126/science.277.5326.693.

A cytoplasmic inhibitor of the JNK signal transduction pathway

M Dickens  1 , J S Rogers, J Cavanagh, A Raitano, Z Xia, J R Halpern, M E Greenberg, C L Sawyers, R J Davis
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A cytoplasmic inhibitor of the JNK signal transduction pathway

M Dickens et al. Science. .

Abstract

The c-Jun amino-terminal kinase (JNK) is a member of the stress-activated group of mitogen-activated protein (MAP) kinases that are implicated in the control of cell growth. A murine cytoplasmic protein that binds specifically to JNK [the JNK interacting protein-1 (JIP-1)] was characterized and cloned. JIP-1 caused cytoplasmic retention of JNK and inhibition of JNK-regulated gene expression. In addition, JIP-1 suppressed the effects of the JNK signaling pathway on cellular proliferation, including transformation by the Bcr-Abl oncogene. This analysis identifies JIP-1 as a specific inhibitor of the JNK signal transduction pathway and establishes protein targeting as a mechanism that regulates signaling by stress-activated MAP kinases.

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