PAK4 | Serine/threonine-protein kinase PAK 4
 
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Sequence Viewer
Gene
Synonyms
KIAA1142
Protein Name
Serine/threonine-protein kinase PAK 4
UniProt ID
O96013 [go to UniProt ] [go to PDBe-KB ]
Ensembl Gene ID
NCBI Gene ID
Molecular Weight
64072
Protein Length
591
Protein Domain
3D Structure
(PDB ID : 4fih)
Target by Small Molecules
Protein-protein Interaction Database
Gene Expression
Drugs and Diseases
Enzyme Class
2.7.11.1; (BRENDA)
Catalytic Site
Catalytic Activity
ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein]ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl-[protein]
Localization
Cytoplasm;
Function
Serine/threonine protein kinase that plays a role in a variety of different signaling pathways including cytoskeleton regulation, cell migration, growth, proliferation or cell survival. Activation by various effectors including growth factor receptors or active CDC42 and RAC1 results in a conformational change and a subsequent autophosphorylation on several serine and/or threonine residues. Phosphorylates and inactivates the protein phosphatase SSH1, leading to increased inhibitory phosphorylation of the actin binding/depolymerizing factor cofilin. Decreased cofilin activity may lead to stabilization of actin filaments. Phosphorylates LIMK1, a kinase that also inhibits the activity of cofilin. Phosphorylates integrin beta5/ITGB5 and thus regulates cell motility. Phosphorylates ARHGEF2 and activates the downstream target RHOA that plays a role in the regulation of assembly of focal adhesions and actin stress fibers. Stimulates cell survival by phosphorylating the BCL2 antagonist of cell death BAD. Alternatively, inhibits apoptosis by preventing caspase-8 binding to death domain receptors in a kinase independent manner. Plays a role in cell-cycle progression by controlling levels of the cell-cycle regulatory protein CDKN1A and by phosphorylating RAN.
Gene Ontology
GO:0005913; GO:0005737; GO:0005925; GO:0005794; GO:0005524; GO:0098641; GO:0004672; GO:0004674; GO:0048365; GO:0032147; GO:0006915; GO:0007049; GO:0016477; GO:0008283; GO:0071407; GO:0007010; GO:0060996; GO:2000352; GO:0045766; GO:0001558; GO:0043408; GO:0007165; GO:0023014; GO:0031098
 
Gene Ontology