Direct Interaction between Ras and the Kinase Domain of Mitogen-activated Protein Kinase Kinase Kinase (MEKK1)
| Autor: | Marijane Russell, Carol A. Lange-Carter, Gary L. Johnson |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Recombinant Fusion Proteins
Protein Serine-Threonine Kinases Mitogen-activated protein kinase kinase Biochemistry MAP2K7 Proto-Oncogene Proteins Chlorocebus aethiops Animals ASK1 c-Raf Molecular Biology Cell Line Transformed biology MAP kinase kinase kinase Chemistry Cyclin-dependent kinase 2 Cell Biology Peptide Fragments Protein Structure Tertiary Cell biology Proto-Oncogene Proteins c-raf Guanosine 5'-O-(3-Thiotriphosphate) biology.protein Cyclin-dependent kinase 9 Protein Binding |
| Zdroj: | Journal of Biological Chemistry. 270:11757-11760 |
| ISSN: | 0021-9258 |
| DOI: | 10.1074/jbc.270.20.11757 |
| Popis: | Mitogen-activated protein kinase kinase kinase (MEKK1) is a serine-threonine kinase that regulates sequential protein kinase pathways involving stress-activated protein kinases and mitogen-activated protein kinases. MEKK1 is activated in response to growth factor stimulation of cells and by expression of activated Ras. We demonstrate that the kinase domain of MEKK1 (MEKKCOOH) binds to GST-RasV12 in a GTP-dependent manner. Purified bacterially expressed MEKKCOOH binds to GST-RasV12(GTP gamma S) (GTP gamma S is guanosine 5'-3-O-(thio)triphosphate), demonstrating a direct interaction of the two proteins. A Ras effector domain peptide blocks the binding of MEKKCOOH to GST-RasV12(GTP gamma S). MEKKCOOH complexed with GST-RasV12(GTP gamma S) is capable of phosphorylating MEK1. These findings indicate that MEKK1 directly binds Ras.GTP. Thus, Ras interacts with protein kinases of both the Raf and MEKK families. |
| Databáze: | OpenAIRE |
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