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  • 1
    Publication Date: 1998-06-20
    Description: MAP kinase phosphatase-3 (MKP-3) dephosphorylates phosphotyrosine and phosphothreonine and inactivates selectively ERK family mitogen-activated protein (MAP) kinases. MKP-3 was activated by direct binding to purified ERK2. Activation was independent of protein kinase activity and required binding of ERK2 to the noncatalytic amino-terminus of MKP-3. Neither the gain-of-function Sevenmaker ERK2 mutant D319N nor c-Jun amino-terminal kinase-stress-activated protein kinase (JNK/SAPK) or p38 MAP kinases bound MKP-3 or caused its catalytic activation. These kinases were also resistant to enzymatic inactivation by MKP-3. Another homologous but nonselective phosphatase, MKP-4, bound and was activated by ERK2, JNK/SAPK, and p38 MAP kinases. Catalytic activation of MAP kinase phosphatases through substrate binding may regulate MAP kinase activation by a large number of receptor systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Camps, M -- Nichols, A -- Gillieron, C -- Antonsson, B -- Muda, M -- Chabert, C -- Boschert, U -- Arkinstall, S -- New York, N.Y. -- Science. 1998 May 22;280(5367):1262-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Geneva Biomedical Research Institute, Glaxo Wellcome Research and Development S.A., CH-1228 Plan-les-Ouates, Geneva, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9596579" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; COS Cells ; Calcium-Calmodulin-Dependent Protein Kinases/antagonists & ; inhibitors/genetics/*metabolism ; Catalysis ; Dual Specificity Phosphatase 6 ; Enzyme Activation ; Epidermal Growth Factor/pharmacology ; Mitogen-Activated Protein Kinase 1 ; Mitogen-Activated Protein Kinase 12 ; Mitogen-Activated Protein Kinase 9 ; *Mitogen-Activated Protein Kinases ; Molecular Sequence Data ; Mutation ; Phosphorylation ; Protein Kinases/metabolism ; Protein Tyrosine Phosphatases/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Transfection ; p38 Mitogen-Activated Protein Kinases
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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