CATH Classification

Domain Context

CATH Clusters

Superfamily Phosphatidylinositol 3-kinase Catalytic Subunit; Chain A, domain 1
Functional Family Dual specificity mitogen-activated protein kinase kinase 5

Enzyme Information

2.7.12.2
Mitogen-activated protein kinase kinase.
based on mapping to UniProt Q13163
ATP + a protein = ADP + a phosphoprotein.
-!- A dual-specific protein kinase and requires mitogen-activated protein kinase kinase kinase (MAPKKK) for activation. -!- It is required for activation of EC 2.7.11.24. -!- Phosphorylation of MEK1 by Raf involves phosphorylation of two serine residues. -!- 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.

UniProtKB Entries (1)

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

PDB Structure

PDB 2O2V
External Links
Method X-RAY DIFFRACTION
Organism Escherichia
Primary Citation
Crystal Structure of the Complex of Human Mitogen Activated Protein Kinase Kinase 5 Phox Domain (MAP2K5-phox) with Human Mitogen Activated Protein Kinase Kinase Kinase 3 (MAP3K3B-phox)
Filippakopoulos, P., Savitsky, P., Ugochukwu, E., Edwards, A., Arrowsmith, C., Sundstrom, M., von Delft, F., Knapp, S.
To be Published
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