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Statements


Kinase-active RAF1 phosphorylates MAP2K1 on S218. 2 / 2
2 |

"Western blot analysis was performed on protein extracts isolated from HPECs overexpressing Cdc37 or the vector only (Fig. 1C) ? .Raf-1 steady-state levels were unchanged. However, Raf-1 activity, measured by the abundance of phosphorylated S217/221 MEK1/2, a direct target of Raf-1 (30) , was consistently elevated in Cdc37-overexpressing cells, whereas total MEK1/2 levels were unchanged. Increases in Cdk4 levels and markedly reduced p16 expression were also consistently observed in Cdc37-overexpressing HPECs. "

"c-Raf activates MEK1 by phosphorylating at serine residues 218 and 222 (30–32)."