Signalling pathways involved in multisite phosphorylation of the transcription factor ATF-2.
The multisite phosphorylation of the transcription factor ATF-2 was investigated using transformed embryonic fibroblasts from wild-type mice and mice deficient in c-Jun N-terminal kinases (JNK)1 and 2, and in the presence and absence of inhibitors of p38 mitogen-activated protein kinase (p38 MAPK) and the classical MAP kinase cascade. In wild-type cells, p38 MAPK and extracellular signal-regulated protein kinase (ERK)1/2 were not rate limiting for the phosphorylation of Thr69, Thr71 or Ser90. In JNK-deficient cells, p38 MAPK substituted for JNK partially in the phosphorylation of Thr69 and p38 MAPK or ERK1/2 in the phosphorylation of Thr71. JNK was the only MAP kinase that phosphorylated Ser90 under the conditions examined.
MRC Protein Phosphorylation Unit, MSI/WTB Complex, University of Dundee, Dundee DD1 5EH, Scotland, UK.
Simon
S
Morton
Roger J
RJ
Davis
Philip
P
Cohen
D051698:Activating Transcription Factor 2; D000818:Animals; D000841:Anisomycin / Q000494:pharmacology; D017362:Cyclic AMP Response Element-Binding Protein / Q000378:metabolism*; D004622:Embryo, Mammalian; D004791:Enzyme Inhibitors / Q000494:pharmacology; D005347:Fibroblasts / Q000187:drug effects / Q000502:physiology; D048688:MAP Kinase Kinase 7; D020935:MAP Kinase Signaling System / Q000187:drug effects / Q000502:physiology*; D051379:Mice; D018345:Mice, Knockout; D048055:Mitogen-Activated Protein Kinase 8; D020929:Mitogen-Activated Protein Kinase Kinases / Q000172:deficiency / Q000235:genetics / Q000378:metabolism; D020928:Mitogen-Activated Protein Kinases / Q000172:deficiency / Q000235:genetics / Q000378:metabolism; D010446:Peptide Fragments / Q000737:chemistry / Q000378:metabolism; D010748:Phosphopeptides / Q000737:chemistry / Q000378:metabolism; D010766:Phosphorylation; D015398:Signal Transduction / Q000187:drug effects / Q000502:physiology*; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D014157:Transcription Factors / Q000378:metabolism*; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology; D048051:p38 Mitogen-Activated Protein Kinases
D051698:Activating Transcription Factor 2; C497106:Atf2 protein, mouse; D017362:Cyclic AMP Response Element-Binding Protein; D004791:Enzyme Inhibitors; D010446:Peptide Fragments; D010748:Phosphopeptides; D014157:Transcription Factors; D014409:Tumor Necrosis Factor-alpha; D000841:Anisomycin; D048055:Mitogen-Activated Protein Kinase 8; D020928:Mitogen-Activated Protein Kinases; D048051:p38 Mitogen-Activated Protein Kinases; D048688:MAP Kinase Kinase 7; C482570:Map2k7 protein, mouse; D020929:Mitogen-Activated Protein Kinase Kinases; D013755:Tetradecanoylphorbol Acetate