Recombinant human TAK1 + TAB1 protein

Specifications

Form

Liquid

Additional notes

Affinity purified.

General info

Function

Serine/threonine kinase which acts as an essential component of the MAP kinase signal transduction pathway (PubMed : 10094049, PubMed : 11460167, PubMed : 12589052, PubMed : 16845370, PubMed : 16893890, PubMed : 21512573, PubMed : 8663074, PubMed : 9079627). Plays an important role in the cascades of cellular responses evoked by changes in the environment (PubMed : 10094049, PubMed : 11460167, PubMed : 12589052, PubMed : 16845370, PubMed : 16893890, PubMed : 21512573, PubMed : 8663074, PubMed : 9079627). Mediates signal transduction of TRAF6, various cytokines including interleukin-1 (IL-1), transforming growth factor-beta (TGFB), TGFB-related factors like BMP2 and BMP4, toll-like receptors (TLR), tumor necrosis factor receptor CD40 and B-cell receptor (BCR) (PubMed : 16893890, PubMed : 9079627). Once activated, acts as an upstream activator of the MKK/JNK signal transduction cascade and the p38 MAPK signal transduction cascade through the phosphorylation and activation of several MAP kinase kinases like MAP2K1/MEK1, MAP2K3/MKK3, MAP2K6/MKK6 and MAP2K7/MKK7 (PubMed : 11460167, PubMed : 8663074). These MAP2Ks in turn activate p38 MAPKs and c-jun N-terminal kinases (JNKs); both p38 MAPK and JNK pathways control the transcription factors activator protein-1 (AP-1) (PubMed : 11460167, PubMed : 12589052, PubMed : 8663074). Independently of MAP2Ks and p38 MAPKs, acts as a key activator of NF-kappa-B by promoting activation of the I-kappa-B-kinase (IKK) core complex (PubMed : 12589052, PubMed : 8663074). Mechanistically, recruited to polyubiquitin chains of RIPK2 and IKBKG/NEMO via TAB2/MAP3K7IP2 and TAB3/MAP3K7IP3, and catalyzes phosphorylation and activation of IKBKB/IKKB component of the IKK complex, leading to NF-kappa-B activation (PubMed : 10094049, PubMed : 11460167). In osmotic stress signaling, plays a major role in the activation of MAPK8/JNK1, but not that of NF-kappa-B (PubMed : 16893890). Promotes TRIM5 capsid-specific restriction activity (PubMed : 21512573). Phosphorylates RIPK1 at 'Ser-321' which positively regulates RIPK1 interaction with RIPK3 to promote necroptosis but negatively regulates RIPK1 kinase activity and its interaction with FADD to mediate apoptosis (By similarity). Phosphorylates STING1 in response to cGAMP-activation, promoting association between STEEP1 and STING1 and STING1 translocation to COPII vesicles (PubMed : 37832545).

Sequence similarities

Belongs to the protein kinase superfamily. STE Ser/Thr protein kinase family. MAP kinase kinase kinase subfamily.

Post-translational modifications

Association with TAB1/MAP3K7IP1 promotes autophosphorylation at Ser-192 and subsequent activation. Association with TAB2/MAP3K7IP2, itself associated with free unanchored Lys-63 polyubiquitin chain, promotes autophosphorylation and subsequent activation of MAP3K7. Dephosphorylation at Ser-192 by PPM1B/PP2CB and at Thr-187 by PP2A and PPP6C leads to inactivation.. 'Lys-48'-linked polyubiquitination at Lys-72 is induced by TNFalpha, and leads to proteasomal degradation. Undergoes 'Lys-48'-linked polyubiquitination catalyzed by ITCH (By similarity). Requires 'Lys-63'-linked polyubiquitination for autophosphorylation and subsequent activation. 'Lys-63'-linked ubiquitination does not lead to proteasomal degradation. Deubiquitinated by CYLD, a protease that selectively cleaves 'Lys-63'-linked ubiquitin chains. Deubiquitinated by Y.enterocolitica YopP.. (Microbial infection) Cleaved and inactivated by the proteases 3C of coxsackievirus A16 and human enterovirus D68, allowing the virus to disrupt TRAF6-triggered NF-kappa-B induction.. (Microbial infection) Acetylation of Thr-184 and Thr-187 by Yersinia YopJ prevents phosphorylation and activation, thus blocking the MAPK signaling pathway.