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Generating Conformation-Specific Polyclonal and Monoclonal Anti-Protein Kinase C Antibodies and Anti-Active State Specific PKC Antibodies.
Current Protocols in Chemical Biology 2018 June
The protein kinase C (PKC) family of serine/ threonine kinases has been shown to play active roles as either suppressors or promoters of carcinogenesis in different types of tumors. Using antibodies that preferentially recognize the active conformation of classical PKCs (cPKCs), we have previously shown that in breast cancer samples the expression levels of cPKCs were similar in estrogen receptor-positive (ER+ ) as compared to triple-negative tumors; however, the levels of active cPKCs were different. Determining the activation status of PKCs and other kinases in tumors may thus aid therapeutic decisions. Further, in basic science these tools may be used to understand the spatial and temporal dynamics of PKC signaling under different stimuli and for co-immunoprecipitation studies to detect binding partners and substrates of active cPKCs. In this article, we describe how monoclonal and polyclonal anti-active state PKC antibodies can be obtained using rational approaches to select bona fide epitopes through inspection of the crystal structure of classical PKCs coupled to molecular modeling studies. We believe that this methodology can be used for other kinases and multi-domain enzymes that undergo changes in their conformation upon activation. © 2018 by John Wiley & Sons, Inc.
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