Genome Biol Evol
Adaptation, Physiological; Biological Evolution; Caffeine; Genetic Fitness; Saccharomyces cerevisiae; Time Factors
Adaptive prediction is a capability of diverse organisms, including microbes, to sense a cue and prepare in advance to deal with a future environmental challenge. Here, we investigated the timeframe over which adaptive prediction emerges when an organism encounters an environment with novel structure. We subjected yeast to laboratory evolution in a novel environment with repetitive, coupled exposures to a neutral chemical cue (caffeine), followed by a sublethal dose of a toxin (5-FOA), with an interspersed requirement for uracil prototrophy to counter-select mutants that gained constitutive 5-FOA resistance. We demonstrate the remarkable ability of yeast to internalize a novel environmental pattern within 50-150 generations by adaptively predicting 5-FOA stress upon sensing caffeine. We also demonstrate how novel environmental structure can be internalized by coupling two unrelated response networks, such as the response to caffeine and signaling-mediated conditional peroxisomal localization of proteins.
Institute for Systems Biology
López García de Lomana, Adrián; Kaur, Amardeep; Turkarslan, Serdar; Beer, Karlyn D; Mast, Fred D; Smith, Jennifer J; Aitchison, John D; and Baliga, Nitin S, "Adaptive Prediction Emerges Over Short Evolutionary Time Scales." (2017). Articles, Abstracts, and Reports. 2060.