|Detection of Human PKC zeta by Western Blot. Western blot shows lysates of 293T human embryonic kidney cell line, MCF‑7 human breast cancer cell line, and human lung tissue. PVDF Membrane was probed with 1 µg/mL of Human PKC zeta Antigen Affinity-purified Polyclonal Antibody (Catalog # AF6666) followed by HRP-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # HAF016). A specific band was detected for PKC zeta at approximately 75 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.|
PKC zeta (protein kinase C-zeta, EC=220.127.116.11), also called PKC2, is a 592 amino acid (aa), 79 kDa member of the atypical PKC (aPKC) subfamily of Ser/Thr protein kinases. aPKC proteins can be activated by phorbol esters, but are insensitive to calcium and diacylglycerol. PKC zeta regulates cell polarity in early development, and is necessary for cytokine-induced chemotaxis of macrophages and cancer cells, chemokine-induced adhesion of neutrophils, and polarization of Th2 cells. It is activated by PDK1 phosphorylation, binds ceramide, and translocates to the plasma membrane where it regulates adherens and tight junction formation. PKC zeta contains an OPR domain (aa 15-98), a zinc finger region (aa 130-180), and a protein kinase domain (aa 252-518). PKC zeta potential variants of 409 or 539 aa have alternate start sites at aa 184 or aa 9 (also missing aa 186-233), respectively. Within the region used as an immunogen, human PKC zeta shares 98% aa identity with mouse and rat PKC zeta.
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