Inhibitor of protein kinase C (PKC) ζ; attached to cell permeabilisation Antennapedia domain vector peptide. Consists of amino acids 113 - 129 of PKC ζ pseudosubstrate domain linked by a disulphide bridge to the Antennapedia domain vector peptide. The Antennapedia peptide is actively taken up by intact cells, at 4 or 37°C, ensuring rapid and effective uptake of the inhibitor peptide. Once inside the cell, the disulphide bonds are subjected to reduction in the cytoplasm leading to release of the inhibitor peptide. Induces mast cell degranulation by a PKC ζ-independent pathway.
Laudanna et al (1998) Evidence of ζ protein kinase C involvement in polymorphonuclear neutrophil integrin-dependent adhesion and chemotaxis. J.Biol.Chem 273 30306 PMID:9804792 |Lim et al (2008) A myristoylated pseudosubstrate peptide of PKC-ζ induces degranulation in HMC-1 cells independently of PKC-ζ activity. Life Sci. 82 733 PMID:18289606 |Theodore et al (1995) Intraneuronal delivery of protein kinase C pseudosubstrate leads to growth cone collapse. J.Neurosci. 15 7158 PMID:7472470