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URI permanente para esta coleçãohttp://www.hml.repositorio.ufop.br/handle/123456789/531

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20191

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Autor: search.filters.author.Cunha, Aureliano Claret daAssunto: search.filters.subject.Biotechnological applications

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    High‑affinity transport, cyanide‑resistant respiration, and ethanol production under aerobiosis underlying efficient high glycerol consumption by Wickerhamomyces anomalus.
    (2019) Cunha, Aureliano Claret da; Gomes, Lorena Soares; Santos, Fernanda Godoy; Oliveira, Fábio Faria; Teixeira, Janaina Aparecida; Sampaio, Geraldo Magela Santos; Trópia, Maria José Magalhães; Castro, Ieso de Miranda; Lucas, Cândida Manuel Ribeiro Simões; Brandão, Rogélio Lopes
    Wickerhamomyces anomalus strain LBCM1105 was originally isolated from the wort of cachaça (the Brazilian fermented sugarcane juice-derived Brazilian spirit) and has been shown to grow exceptionally well at high amounts of glycerol. This paramount residue from the biodiesel industry is a promising cheap carbon source for yeast biotechnology. The assessment of the physiological traits underlying the W. anomalus glycerol consumption ability in opposition to Saccharomyces cerevisiae is presented. A new WaStl1 concentrative glycerol-H+ symporter with twice the affinity of S. cerevisiae was identified. As in this yeast, WaSTL1 is repressed by glucose and derepressed/induced by glycerol but much more highly expressed. Moreover, LBCM1105 aerobically growing on glycerol was found to produce ethanol, providing a redox escape to compensate the redox imbalance at the level of cyanide-resistant respiration (CRR) and glycerol 3P shuttle. This work is critical for understanding the utilization of glycerol by non-Saccharomyces yeasts being indispensable to consider their industrial application feeding on biodiesel residue.