The effects of wheat gluten hydrolysates (WGH) preculture on yeast acetic acid tolerance and fermentation performances were investigated. Results showed that WGH preculture significantly increased yeast growth and viability under acetic acid stress. Particularly, the WGH fraction precipitated with 90% (v/v) gradient ethanol (WGH-C) preculture significantly improved yeast cell membrane integrity and H+-ATPase activity, thereby decreasing the intracellular accumulation of ROS and acetic acid. Meanwhile, WGH-C preculture promoted the ethanol production efficiency, shortening the fermentation lag time by 12h and increasing the ethanol yield by 37.46%. These improvements were attributed to that WGH-C preculture regulated intracellular amino acid composition and transport protein related gene expression of yeast. Transcriptome profiling demonstrated that the cell wall and plasma membrane structures were remodeled, reducing the oxidative stress induced by acetic acid. Furthermore, regulation of energy metabolism and transporter activity are prime mechanisms in improving acetic acid tolerance and fermentation efficiency of yeast.
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| Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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| Site | Modification | Modifier | Source | Reference |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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| Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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| Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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