MAP4K3 Antibody – Rabbit Polyclonal

This gene encodes a member of the mitogen-activated protein kinase kinase kinase kinase family. The encoded protein activates key effectors in cell signalling, among them c-Jun. Alternatively spliced transcripts encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Jul 2012]

KHS2: an ubiquitous protein kinase of the STE20 family. May play a role in the response to environmental stress. Regulated by amino acids and acts upstream of mTORC1 and JNK. Required for maximal S6K and 4E-BP1 phosphorylation. Interacts with PPP2R5E, a regulatory subunit of PP2A. Following amino acid withdrawal, pS170 is dephosphorylated via PP2A. The dephosphorylation of pS170 by PP2A in response to amino acid restriction inhibits mTORC1 signaling. The inhibition of PPP2R5E expression prevents the dephosphorylation of KHS2 pS170, impairing mTORC1 inhibition during amino acid withdrawal. Three alternatively spliced isoforms have been described.

Protein type: Protein kinase, STE; EC 2.7.11.1; Kinase, protein; Protein kinase, Ser/Thr (non-receptor); STE group; STE20 family; KHS subfamily

Chromosomal Location of Human Ortholog: 2p22.1

Cellular Component: cytoplasm

Molecular Function: protein serine/threonine kinase activity; protein binding; ATP binding; protein kinase activity; receptor signaling protein serine/threonine kinase activity

Biological Process: regulation of catalytic activity; JNK cascade; protein amino acid phosphorylation; response to UV