Product Name: PAK4Subtide
Product Number: PE-01BIM95
Size: 200 µg      Price:49.00
1 mg      $US97.00
5 mg      213.00
Peptide Name: PAK4Subtide

Product Use: For assaying the phosphotransferase activity of p21-activated kinase 4 (UniProt ID O96013).

Peptide Production Method: Solid-phase peptide synthesis

Peptide Sequence: KLNRRESFVFFMG

Peptide Modifications N Terminus: Free amino

Peptide Modifications C Terminus: βAla-Cys

Peptide Molecular Mass Calculated: 1804.16 Da

Peptide Purity Percent after Synthesis and Purification: 95

Peptide Appearance: White powder

Peptide Form: Solid

Storage Conditions: -20°C

Peptide Recommended Enzyme: PAK4

Scientific Background: PAK4 is a protein-serine/threonine kinase of the STE group and STE20 family and PAKB subfamily. It is highly expressed and widely distributed in most tested human tissues. It stimulates cell survival, inhibits apoptosis, and also plays a role in cell cycle progression. PAK4 has been implicated in the regulation of cytoskeletal organization, and cell morphology, motility and transformation. Binding of GTP-bound Cdc42 to the autoregulatory region at the N-terminus of PAK4 releases monomers from the autoinhibited dimer, enables phosphorylation at S474 and activation of its phosphotransferase activity. It phosphorylates and inactivates the protein phosphatase SSH1, which leads to increased inhibitory phosphorylation of the actin binding/depolymerizing factor cofilin and stabilization of actin filaments. It phosphorylates LIMK1, a kinase that also inhibits the activity of cofilin. Other substrates include integrin beta5/ITGB5, ARHGEF2, RAN, and BAD. It inhibits apoptosis by preventing caspase-8 binding to death domain receptors in a kinase independent manner. It plays a role in cell-cycle progression by controlling levels of the cell-cycle regulatory protein CDKN1A. PAK4 mutations are associated with increased carcinoma cell motility and influenced inhibitor sensitivity. The protein kinase was found to be necessary for oncogenic transformation of breast cancer cells.