Recombinant Human Mitogen-activated protein kinase kinase kinase kinase 2 (MAP4K2), Truncated

Uniprot Id

Q12851

Target Species

Human

Target Name

MAP4K2

Target Full Name

Mitogen-activated protein kinase kinase kinase kinase 2

Target Function

Serine/threonine-protein kinase which acts as an essential component of the MAP kinase signal transduction pathway. Acts as a MAPK kinase kinase kinase (MAP4K) and is an upstream activator of the stress-activated protein kinase/c-Jun N-terminal kinase (SAP/JNK) signaling pathway and to a lesser extent of the p38 MAPKs signaling pathway. Required for the efficient activation of JNKs by TRAF6-dependent stimuli, including pathogen-associated molecular patterns (PAMPs) such as polyinosine-polycytidine (poly(IC)), lipopolysaccharides (LPS), lipid A, peptidoglycan (PGN), or bacterial flagellin. To a lesser degree, IL-1 and engagement of CD40 also stimulate MAP4K2-mediated JNKs activation. The requirement for MAP4K2/GCK is most pronounced for LPS signaling, and extends to LPS stimulation of c-Jun phosphorylation and induction of IL-8. Enhances MAP3K1 oligomerization, which may relieve N-terminal mediated MAP3K1 autoinhibition and lead to activation following autophosphorylation. Mediates also the SAP/JNK signaling pathway and the p38 MAPKs signaling pathway through activation of the MAP3Ks MAP3K10/MLK2 and MAP3K11/MLK3. May play a role in the regulation of vesicle targeting or fusion. regulation of vesicle targeting or fusion.

Target Subcellular Location

Cytoplasm. Basolateral cell membrane; Peripheral membrane protein. Golgi apparatus membrane; Peripheral membrane protein.

Target Protein Families

Protein kinase superfamily, STE Ser/Thr protein kinase family, STE20 subfamily

Target Tissue Specificity

Highly expressed in germinal center but not mantle zone B-cells. Also expressed in lung, brain and placenta and at lower levels in other tissues examined.

Target Synonyms

B lymphocyte serine/threonine protein kinase ; B lymphocyte serine/threonine-protein kinase; BL44; GC kinase; GCK; Germinal center kinase; germinal centre kinase (GC kinase); M4K2_HUMAN; Map4k2; MAPK/ERK kinase kinase kinase 2; MEK kinase kinase 2; MEKKK 2; Mitogen activated protein kinase kinase kinase kinase 2; Mitogen-activated protein kinase kinase kinase kinase 2; Rab8 interacting protein; Rab8 interacting protein, formerly; Rab8-interacting protein; RAB8IP; RAB8IP, formerly

Target Background

The protein encoded by this gene is a member of the serine/threonine protein kinase family. Although this kinase is found in many tissues, its expression in lymphoid follicles is restricted to the cells of germinal centre, where it may participate in B-cell differentiation. This kinase can be activated by TNF-alpha, and has been shown to specifically activate MAP kinases. This kinase is also found to interact with TNF receptor-associated factor 2 (TRAF2), which is involved in the activation of MAP3K1/MEKK1. Alternative splicing results in multiple transcript variants.