Chemorepellent signaling through the PACAP/lysozyme receptor is mediated through cAMP and PKC in Tetrahymena thermophila |
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Authors: | D.L. Hassenzahl N.K. Yorgey M.D. Keedy A.R. Price J.A. Hall C.C. Myzcka H.G. Kuruvilla |
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Affiliation: | Cedarville University, Department of Science and Mathematics, OH 45314, USA. |
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Abstract: | Pituitary adenylate cyclase-activating peptide and lysozyme are potent chemorepellents which act through the same receptor in Tetrahymena. Using in vivo behavioral studies, we have found that the pituitary adenylate cyclase-activating peptide/lysozyme receptor appears to signal through a G-protein pathway which is mediated through both adenosine 3'5'monophosphate and protein kinase C. Avoidance to pituitary adenylate cyclase-activating peptide and lysozyme is inhibited by the G-protein inhibitor, guanosine 5'-O-(2thiodiphosphate), the adenosine 3'5'monophate analog, Rp-adenosine-3', 5' cyclic monophosphorothioate, and the protein kinase C inhibitors, calphostin C and bisindolylmaleimide IV. A proposed model for signaling through the pituitary adenylate cyclase-activating peptide/lysozyme receptor is briefly outlined. |
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