Static microplate fermentation and automated growth analysis approaches identified a highly-aldehyde resistant Saccharomyces cerevisiae strain

Mello, Fellipe da Silveira Bezerra de; Coradini, Alessandro L V; Tizei, Pedro A. G.; Carazzolle, Marcelo Falsarella; Pereira, Gonçalo Amarante Guimarães; Teixeira, Gleidson Silva

doi:10.1016/j.biombioe.2018.10.019

Cited by 21 publications

(16 citation statements)

References 51 publications

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“…1. OCHT® software was used to fit a sigmoidal curve function of determinate growth and the maximum specific growth rate (µMax) was calculated at the inflection point. Growth parameters obtained from each experiment were normalized as a percentage of the internal controls.…”

Section: Methodsmentioning

confidence: 99%

Synthesis and testing of novel alternative oxidase (AOX) inhibitors with antifungal activity against Moniliophthora perniciosa (Stahel), the causal agent of witches' broom disease of cocoa, and other phytopathogens

Barsottini

Pires

Vieira

et al. 2018

Pest Management Science

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BACKGROUND: Moniliophthora perniciosa (Stahel) Aime & Phillips-Mora is the causal agent of witches' broom disease (WBD) of cocoa (Theobroma cacao L.) and a threat to the chocolate industry. The membrane-bound enzyme alternative oxidase (AOX) is critical for M. perniciosa virulence and resistance to fungicides, which has also been observed in other phytopathogens. Notably AOX is an escape mechanism from strobilurins and other respiration inhibitors, making AOX a promising target for controlling WBD and other fungal diseases. RESULTS:We present the first study aimed at developing novel fungal AOX inhibitors. N-Phenylbenzamide (NPD) derivatives were screened in the model yeast Pichia pastoris through oxygen consumption and growth measurements. The most promising AOX inhibitor (NPD 7j-41) was further characterized and displayed better activity than the classical AOX inhibitor SHAM in vitro against filamentous fugal phytopathogens, such as M. perniciosa, Sclerotinia sclerotiorum and Venturia pirina. We demonstrate that 7j-41 inhibits M. perniciosa spore germination and prevents WBD symptom appearance in infected plants. Finally, a structural model of P. pastoris AOX was created and used in ligand structure-activity relationships analyses. CONCLUSION: We present novel fungal AOX inhibitors with antifungal activity against relevant phytopathogens. We envisage the development of novel antifungal agents to secure food production.

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Section: Methodsmentioning

confidence: 99%

Synthesis and testing of novel alternative oxidase (AOX) inhibitors with antifungal activity against Moniliophthora perniciosa (Stahel), the causal agent of witches' broom disease of cocoa, and other phytopathogens

Barsottini

Pires

Vieira

et al. 2018

Pest Management Science

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“…The selection of yeast resistant to aldehydes may partially circumvent the problem. In fact, yeasts resistant up to 40 mM furfural and 80 mM HMF have been described recently [45,46]. Nevertheless, and taking into account the diversity of hydrolysates, the direct elimination of inhibitory compounds has to be taken into account as an alternative (bio)technology.…”

Section: Discussionmentioning

confidence: 99%

A Case of Adaptive Laboratory Evolution (ALE): Biodegradation of Furfural by Pseudomonas pseudoalcaligenes CECT 5344

Igeño

Macías

Blasco

2019

Genes

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Pseudomonas pseudoalcaligenes CECT 5344 is a bacterium able to assimilate cyanide as a nitrogen source at alkaline pH. Genome sequencing of this strain allowed the detection of genes related to the utilization of furfurals as a carbon and energy source. Furfural and 5-(hydroxymethyl) furfural (HMF) are byproducts of sugars production during the hydrolysis of lignocellulosic biomass. Since they inhibit the yeast fermentation to obtain bioethanol from sugars, the biodegradation of these compounds has attracted certain scientific interest. P. pseudoalcaligenes was able to use furfuryl alcohol, furfural and furoic acid as carbon sources, but after a lag period of several days. Once adapted, the evolved strain (R1D) did not show any more prolonged lag phases. The transcriptomic analysis (RNA-seq) of R1D revealed a non-conservative punctual mutation (L261R) in BN5_2307, a member of the AraC family of activators, modifying the charge of the HTH region of the protein. The inactivation of the mutated gene in the evolved strain by double recombination reverted to the original phenotype. Although the bacterium did not assimilate HMF, it transformed it into value-added building blocks for the chemical industry. These results could be used to improve the production of cost-effective second-generation biofuels from agricultural wastes.

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“…Concentrations higher than those described were used to evaluate the resistance of the thermotolerant yeast LBGA-01 in comparison to the industrial yeast CAT-1 and the laboratory haploid yeast SC9721. ( Table 2) HMF 40 e 80 mM [47] Furfural 0,1 e 0,9 mM [47] * in this case, the used medium was only composed of YP2 × (2% Yeast ex tract and 4% Peptone), adding the desired glucose concentration.…”

Section: Dna Extractionmentioning

confidence: 99%

Physiological characterization of a new thermotolerant yeast strain isolated during Brazilian ethanol production and its application in high temperature fermentation

Prado

Mandrujano

Souza

et al. 2020

Preprint

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Abstract Background The use of thermotolerant yeast strains can improve the efficiency of ethanol fermentation, allowing fermentation to occur at temperatures higher than 40 °C. This increment in temperature could benefit traditional bio-ethanol production and allow simultaneous saccharification and fermentation (SSF) of starch or lignocellulosic biomass. Results We identified and characterized the physiology of a new thermotolerant strain able to fermentate at 40 °C while producing high yields of ethanol. Our results showed that, in comparison to the industrial yeast CAT-1, our strain was more resistant to various stressors generated during the production of first- and second-generation ethanol, and it also was able to change the pattern of genes involved in sucrose assimilation (SUC2 and AGT1). The formation of secondary products of fermentation was different at 40ºC, with reduced expression of genes involved in the formation of glycerol (GPD2), acetate (ALD6 and ALD4), and acetyl-CoA (ACS2). Conclusion The LBGA-01 strain is a thermotolerant strain that modulates the production of key genes, changing metabolic pathways during high-temperature fermentation, and increasing its tolerance to the high concentration of ethanol, sugar, acetic lactic, acetic acid, furfural and HMF. This indicates that this strain can be used to improve first- and second-generation ethanol production in Brazil.

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Static microplate fermentation and automated growth analysis approaches identified a highly-aldehyde resistant Saccharomyces cerevisiae strain

Cited by 21 publications

References 51 publications

Synthesis and testing of novel alternative oxidase (AOX) inhibitors with antifungal activity against Moniliophthora perniciosa (Stahel), the causal agent of witches' broom disease of cocoa, and other phytopathogens

Synthesis and testing of novel alternative oxidase (AOX) inhibitors with antifungal activity against Moniliophthora perniciosa (Stahel), the causal agent of witches' broom disease of cocoa, and other phytopathogens

A Case of Adaptive Laboratory Evolution (ALE): Biodegradation of Furfural by Pseudomonas pseudoalcaligenes CECT 5344

Physiological characterization of a new thermotolerant yeast strain isolated during Brazilian ethanol production and its application in high temperature fermentation

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