NCIt definition : Mitogen-activated protein kinase 9 (424 aa, 48 kDa) is encoded by the human MAPK9
gene. This protein is involved in cytokine signaling, protein phosphorylation and
transcriptional regulation.;
NCIt note : MAPK9 mediates immediate-early gene expression. MAPK9 binds scaffolding proteins MAPK8IP1/2/3.
MAPK9/UV-induced apoptosis appears related to cytochrome c-mediated cell death. Increased
p53 stability in nonstressed cells results from MAPK9 blocked p53 ubiquitination.
MAPK9 appears required for T-helper cell differentiation into Th1 cells.;