KSR1

Enzymes, RAS pathway related proteins

Intracellular

Cell type enhanced (Cone photoreceptor cells, Oligodendrocyte precursor cells, Glandular and luminal cells, Inhibitory neurons, Oligodendrocytes)

Immune cell enhanced (eosinophil)

Cell line enhanced (HDLM-2, HEL, HMC-1)

Homodimer (PubMed:29433126). Heterodimerizes (via N-terminus) with BRAF (via N-terminus) in a MAP2K1/MEK1 or MAP2K2/MEK2-dependent manner (PubMed:29433126). Interacts with MAP2K1/MEK1 and MAP2K2/MEK2 (PubMed:10409742, PubMed:29433126). Binding to MAP2K1/MEK1 releases the intramolecular inhibitory interaction between KSR1 N-terminus and kinase domains which is required for the subsequent RSK1 dimerization with BRAF (PubMed:29433126). Identified in a complex with AKAP13, MAP2K1 and BRAF (By similarity). Interacts with AKAP13 and BRAF (PubMed:21102438). Interacts with RAF and MAPK/ERK, in a Ras-dependent manner (By similarity). Interacts with 14-3-3 proteins including YWHAB (By similarity). Interacts with HSP90AA1/HSP90, YWHAE/14-3-3 and CDC37 (PubMed:10409742, PubMed:29433126). The binding of 14-3-3 proteins to phosphorylated KSR1 prevents the membrane localization (By similarity). Interacts with MARK3 (By similarity). Interacts with PPP2R1A and PPP2CA (By similarity). Interacts with isoform 1 of VRK2 (PubMed:20679487).

Kinase, Serine/threonine-protein kinase, Transferase