Human epidermal growth factor (hEGF) plays a crucial role in promoting cell growth and has various clinical applications. Due to limited natural sources and the high cost of chemical synthesis, researchers are now exploring genetic engineering as a potential method for hEGF production. In this particular study, a novel hEGF expression system was developed using Saccharomyces cerevisiae. This system involved optimizing the promoter and signal peptide and deleting protease-coding genes PEP4, PRB1, and YAP3, overexpressing chaperones KAR2 and PDI1 in the protein secretion pathway, which led to a 2.01-fold increase in hEGF production compared to the wild type strain. Furthermore, biofilm-forming genes FLO11 and ALS3 were integrated to create a biofilm strain with adhesive properties. A biofilm-based immobilized continuous fermentation model was established to leverage the characteristics of this biofilm strain. Each batch of this model yielded 130 mg/L of hEGF, with a production efficiency of 2.71 mg/L/h - surpassing the production efficiency of traditional free fermentation (1.62 mg/L/h). This study presents a promising fermentation model for efficient hEGF production based on biofilm characteristics, offering valuable insights for the application of biofilm fermentation in the production of small molecule peptides.
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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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