NCIt definition : Mitogen-activated protein kinase 1 (390 aa, 41 kDa) is encoded by the human MAPK1
gene. This protein plays a role in cell cycle regulation, signal transduction, transcriptional
regulation and serine/threonine phosphorylation.;
NCIt note : When MAPK1 is autophosphorylated or phosphorylated/activated by upstream kinases on
threonine and tyrosine residues, it forms dimers with phosphorylated and unphosphorylated
ERK partners, translocates to the nucleus and phosphorylates target transcription
factors.;