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Chemical Signaling in Ciliates
Authors:PIERANGELO LUPORINI  ADRIANA VALLESI  CRISTINA MICELI  RALPH A. BRADSHAW
Affiliation:Dipartimento di Biologia Molecolare, Cellulare e Animale, University of Camerino, 62032 Camerino (MC), Italy;Department of Biological Chemistry, University of California, Irvine, California 92717, USA
Abstract:ABSTRACT. For long, our knowledge of the biology of ciliate pheromones has long relied solely upon the study of the two structurally unrelated gamones identified in culture filtrates of a Blepharisma species. However, the characterization of a number of polypeptide pheromones secreted by Euplotes raikovi and E. octocarinatus has now established that structural relationships of homology usually link these molecules, which is consistent with the genetic basis of the mating type systems evolved by these species. In this context, our growing appreciation of the conserved and variable elements of the pheromone architecture should foster progress in the understanding of pheromone-receptor interactions and thus, provide important clues into pheromone mechanisms of action.
Keywords:Cell recognition molecules    Euplotes, polypeptide    pheromones    mating types
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