CATH Classification

Domain Context

CATH Clusters

Superfamily Phosphatidylinositol 3-kinase Catalytic Subunit; Chain A, domain 1
Functional Family Mitogen-activated protein kinase kinase kinase 3 isoform 2

Enzyme Information

2.7.11.25
Mitogen-activated protein kinase kinase kinase.
based on mapping to UniProt Q99759
ATP + a protein = ADP + a phosphoprotein.
-!- This enzyme phosphorylates and activates its downstream protein kinase, EC 2.7.12.2, but requires MAPKKKK for activation. -!- Some members of this family can be activated by p21-activated kinases (PAK/STE20) or Ras. -!- While c-Raf and c-Mos activate the classical MAPK/ERK pathway, MEKK1 and MEKK2 preferentially activate the c-Jun N-terminal protein kinase(JNK)/stress-activated protein kinase (SAPK) pathway. -!- Mitogen-activated protein kinase (MAPK) signal transduction pathways are among the most widespread mechanisms of cellular regulation. -!- Mammalian MAPK pathways can be recruited by a wide variety of stimuli including hormones (e.g. insulin and growth hormone), mitogens (e.g. epidermal growth factor and platelet-derived growth factor), vasoactive peptides (e.g. angiotensin-II and endothelin), inflammatory cytokines of the tumor necrosis factor (TNF) family and environmental stresses such as osmotic shock, ionizing radiation and ischemeic injury. -!- Formerly EC 2.7.1.37.

UniProtKB Entries (1)

Q99759
M3K3_HUMAN
Homo sapiens
Mitogen-activated protein kinase kinase kinase 3

PDB Structure

PDB 2PPH
External Links
Method SOLUTION NMR
Organism Escherichia
Primary Citation
Insight into the Binding Properties of MEKK3 PB1 to MEK5 PB1 from Its Solution Structure.
Hu, Q., Shen, W., Huang, H., Liu, J., Zhang, J., Huang, X., Wu, J., Shi, Y.
Biochemistry