title: Catalytic activation of the phosphatase MKP-3 by ERK2 mitogen-activated protein kinase.
abstract: 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.
authors.affiliation: Geneva Biomedical Research Institute, Glaxo Wellcome Research and Development S.A., CH-1228 Plan-les-Ouates, Geneva, Switzerland.
authors.forename: M
authors.initials: M
authors.lastname: Camps
authors.forename: A
authors.initials: A
authors.lastname: Nichols
authors.forename: C
authors.initials: C
authors.lastname: Gillieron
authors.forename: B
authors.initials: B
authors.lastname: Antonsson
authors.forename: M
authors.initials: M
authors.lastname: Muda
authors.forename: C
authors.initials: C
authors.lastname: Chabert
authors.forename: U
authors.initials: U
authors.lastname: Boschert
authors.forename: S
authors.initials: S
authors.lastname: Arkinstall
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D019556:COS Cells; D017871:Calcium-Calmodulin-Dependent Protein Kinases / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism*; D002384:Catalysis; D054642:Dual Specificity Phosphatase 6; D004789:Enzyme Activation; D004815:Epidermal Growth Factor / Q000494:pharmacology; D019950:Mitogen-Activated Protein Kinase 1; D048291:Mitogen-Activated Protein Kinase 12; D048056:Mitogen-Activated Protein Kinase 9; D020928:Mitogen-Activated Protein Kinases; D008969:Molecular Sequence Data; D009154:Mutation; D010766:Phosphorylation; D011494:Protein Kinases / Q000378:metabolism; D017027:Protein Tyrosine Phosphatases / Q000235:genetics / Q000378:metabolism*; D011993:Recombinant Fusion Proteins / Q000378:metabolism; D015398:Signal Transduction; D014162:Transfection; D048051:p38 Mitogen-Activated Protein Kinases
chemical_list: D011993:Recombinant Fusion Proteins; D004815:Epidermal Growth Factor; D011494:Protein Kinases; D048291:Mitogen-Activated Protein Kinase 12; D048056:Mitogen-Activated Protein Kinase 9; D017871:Calcium-Calmodulin-Dependent Protein Kinases; D019950:Mitogen-Activated Protein Kinase 1; D020928:Mitogen-Activated Protein Kinases; D048051:p38 Mitogen-Activated Protein Kinases; D054642:Dual Specificity Phosphatase 6; D017027:Protein Tyrosine Phosphatases