Co-Authors:
Nahon, E., Inst. Nature Conservation Research, Tel Aviv University, George S. Wise Fac. of Life Sciences, Ramat Aviv 69978, Israel
Atzmony, D., Inst. Nature Conservation Research, Tel Aviv University, George S. Wise Fac. of Life Sciences, Ramat Aviv 69978, Israel
Zahavi, A., Inst. Nature Conservation Research, Tel Aviv University, George S. Wise Fac. of Life Sciences, Ramat Aviv 69978, Israel
Granot, D., Inst. Nature Conservation Research, Tel Aviv University, George S. Wise Fac. of Life Sciences, Ramat Aviv 69978, Israel
Abstract:
This paper reviews the function of peptidic pheromones in the yeast Saccharomyces cerevisiae. It suggests a new model, based on the handicap principle, for the mechanism that affects mate choice in yeast. The handicap principle provides a general model to interpret messages encoded in signals. According to this principle, the reliability of signals is directly related to their costs. The cost of a signal, and hence its reliability, is especially important when the signal is used to advertise mate quality. The principle suggests that low-quality individuals are unable to 'pretend' to be high quality individuals because of their inability to pay the cost of a high-quality signal. Short peptides may not display the phenotypic quality of the secreting signaler because they are easy to produce. On the other hand, large proteins with post-translational modifications may vary in correlation with the variation of the phenotypic quality of the signaler. Data from various studies support our hypothesis that large proteins with post-translational modifications are involved in yeast mating. The model we suggest for yeast mating may function also in other cases, such as development processes, in which cells interact through the use of peptidic signals.
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