MEK1 (also known as MAP2K1) is a serine-threonine protein kinase that is a central mediator in the MAP kinase signaling pathway. As part of the MAP kinase pathway, MEK1 is involved in many cellular processes, including cell proliferation, differentiation, and transcriptional regulation.
Figure 1. Schematic of the MAPK and PI3K pathways. Growth factor binding to receptor tyrosine kinase results in activation of the MAPK signaling pathway (RAS-RAF-MEK-ERK) and the PI3K pathway (PI3K-AKT-mTOR). The letter "K" within the schema denotes the tyrosine kinase domain.
Suggested Citation: Lovly, C., L. Horn, W. Pao. 2015. MEK1 (MAP2K1). My Cancer Genome https://www.mycancergenome.org/content/disease/lung-cancer/map2k1/?tab=0 (Updated December 7).
Last Updated: December 7, 2015