Rabbit anti-Human Phospho-PAK4/PAK5/PAK6-S474/S560/S602 Monoclonal Antibody

Uniprot Id

O96013

Target Species

Human

Target Name

PAK4

Target Full Name

Serine/threonine-protein kinase PAK 4

Target 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.

Target Subcellular Location

Cytoplasm.

Target Protein Families

Protein kinase superfamily, STE Ser/Thr protein kinase family, STE20 subfamily

Target Tissue Specificity

Highest expression in prostate, testis and colon.

Target Research Area

Apoptosis

Target Synonyms

KIAA1142; p21 activated kinase 4; p21 Cdc42/Rac1-actiated kinase 4; P21 protein (Cdc42/Rac) activated kinase 4; p21(CDKN1A) activated kinase 4; p21-activated kinase 4; PAK 4; PAK-4; Pak4; PAK4_HUMAN; Protein kinase related to S.cerevisiae STE20 effector for Cdc42Hs; Serine threonine kinase PAK 4; Serine/threonine protein kinase PAK 4; Serine/threonine protein kinase PAK4; Serine/threonine-protein kinase PAK 4

Target Background

PAK proteins, a family of serine/threonine p21-activating kinases, include PAK1, PAK2, PAK3 and PAK4. PAK proteins are critical effectors that link Rho GTPases to cytoskeleton reorganization and nuclear signaling. They serve as targets for the small GTP binding proteins Cdc42 and Rac and have been implicated in a wide range of biological activities. PAK4 interacts specifically with the GTP-bound form of Cdc42Hs and weakly activates the JNK family of MAP kinases. PAK4 is a mediator of filopodia formation and may play a role in the reorganization of the actin cytoskeleton. Multiple alternatively spliced transcript variants encoding distinct isoforms have been found for this gene.