Adaptive prediction emerges over short evolutionary time scales

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Abstract

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.

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De Lomana, A. L. G., Kaur, A., Turkarslan, S., Beer, K. D., Mast, F. D., Smith, J. J., … Baliga, N. S. (2017). Adaptive prediction emerges over short evolutionary time scales. Genome Biology and Evolution, 9(6), 1616–1623. https://doi.org/10.1093/gbe/evx116

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