Mitogen-activated protein kinase 6 (MAPK6)

Atypical MAPK protein.

Phosphorylates microtubule- associated protein 2 (MAP2) and MAPKAPK5.

The precise role of the complex formed with MAPKAPK5 is still unclear, but the complicated follows a complicated set of phosphorylation events: upon interaction with atypical MAPKAPK5, ERK3/MAPK6 is phosphorylated at Ser-189 and then mediates phosphorylation and activation of MAPKAPK5, which in turn phosphorylates ERK3/MAPK6. May promote entry in the cell cycle (By similarity).