eLife (Apr 2018)

Evidence for loss and reacquisition of alcoholic fermentation in a fructophilic yeast lineage

  • Carla Gonçalves,
  • Jennifer H Wisecaver,
  • Jacek Kominek,
  • Madalena Salema Oom,
  • Maria José Leandro,
  • Xing-Xing Shen,
  • Dana A Opulente,
  • Xiaofan Zhou,
  • David Peris,
  • Cletus P Kurtzman,
  • Chris Todd Hittinger,
  • Antonis Rokas,
  • Paula Gonçalves

DOI
https://doi.org/10.7554/eLife.33034
Journal volume & issue
Vol. 7

Abstract

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Fructophily is a rare trait that consists of the preference for fructose over other carbon sources. Here, we show that in a yeast lineage (the Wickerhamiella/Starmerella, W/S clade) comprised of fructophilic species thriving in the high-sugar floral niche, the acquisition of fructophily is concurrent with a wider remodeling of central carbon metabolism. Coupling comparative genomics with biochemical and genetic approaches, we gathered ample evidence for the loss of alcoholic fermentation in an ancestor of the W/S clade and subsequent reinstatement through either horizontal acquisition of homologous bacterial genes or modification of a pre-existing yeast gene. An enzyme required for sucrose assimilation was also acquired from bacteria, suggesting that the genetic novelties identified in the W/S clade may be related to adaptation to the high-sugar environment. This work shows how even central carbon metabolism can be remodeled by a surge of HGT events.

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