Dual specificity mitogen-activated protein kinase kinase 4 (MAP2K4)

Dual specificity mitogen-activated protein kinase kinase 4 (MAP2K4) is a central component of the mitogen-activated protein kinase (MAPK) signaling cascade, functioning as a dual-specificity kinase that phosphorylates and activates c-Jun N-terminal kinases (JNKs) and p38 MAPKs [UniProt: P45985]. It is primarily activated by environmental stressors, such as UV radiation and heat shock, as well as pro-inflammatory cytokines like TNF-alpha and IL-1 [PubMed: 25813024]. In human disease, MAP2K4 plays a complex, context-dependent role in oncology, acting as a tumor suppressor in some cancers (e.g., prostate and pancreatic) while promoting metastasis in others [PubMed: 17638891]. Beyond cancer, it is implicated in inflammatory diseases and neurodegenerative processes, making it a significant target for therapeutic research [PubMed: 31431614]. Pharmacological targeting of MAP2K4 typically involves small molecule inhibitors designed to modulate downstream stress-activated signaling, although many current clinical kinase inhibitors interact with it as an off-target effect [PubChem: CID 439533].

Other names

MKK4SEK1JNKK1MAPK/ERK kinase 4SAPK kinase 1JNK-activating kinase 1Stress-activated protein kinase kinase 1

Small molecule inhibition of kinase activity to block the phosphorylation of downstream JNK and p38 MAPK substrates [PubMed: 25813024].