IPR043969
MAP3K, PH domain
InterPro entry
Short name | MAP3K_PH |
Description
Apoptosis signal-regulating kinases (ASK1/2/3 or MAP3K5/6/15) are mitogen-activated protein kinase kinase kinases (MAP3Ks) that mediate cellular responses to redox stress and inflammatory cytokines and play a key role in innate immunity and viral infection. This kind of signalling kinases are regulated by oligomerization and regulatory domains. In its N-terminal there is a thioredoxin-binding domain that negatively regulates activity and a TNF receptor-associated factors (TRAFs)-binding domain which triggers ASK activation and kinase activity. TRAFs-binding domain is composed by 14 helices, which form seven tetratricopeptide repeats (TPRs), followed by a PH-like domain to complete de central regulatory domain of ASK. The central regulatory region promotes ASK1 activity via its PH domain but also facilitates ASK1 autoinhibition by bringing the thioredoxin-binding and kinase domains into close proximity. The PH-like domain, adjacent to the kinase domain, is required together with an intact TPR region for ASK1 activity.
The major role of the central regulatory region is to bring the thioredoxin-binding domain into close proximity to the kinase domain to inhibit its activity
[1].
This PH-like domain is found in the regulatory region of ASK1/2/3 (also known as MAP3K5/6/15). The central regulatory region of ASK1 mediates a compact arrangement of the kinase and thioredoxin-binding domains which allows the binding of substrates for phosphorylation. This PH-like domain adopts the typical form of two antiparallel β-sheets followed by a C-terminal amphipathic helix
[1].
References
GO terms
Cross References
ENZYME
Contributing Member Database Entry
- Pfam:PF19039