JID1 Overexpression in Yeast for Ethanol Yield
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Solution Overview
Problem
Current yeast-based ethanol production methods are inefficient, with high costs due to feedstock expenses, and there is a need for robust yeast strains that can produce more ethanol compared to conventional and engineered yeasts to enhance economic viability.
Innovation Solution
Development of modified yeast cells that over-express the JID1 protein, achieved through genetic alterations such as introducing nucleic acids or expression cassettes with promoters like HTA1 or RPL37B, leading to increased JID1 polypeptide and mRNA production, which in turn enhances ethanol production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional yeast strains are used for ethanol production, then the production process is simple and well-established, but ethanol yield is limited and feedstock costs remain high
Solution Approach 1:
The patent changes the expression level parameter of the JID1 gene in yeast by introducing multiple copies of the gene or using strong promoters, thereby increasing JID1 protein production. This parameter change leads to improved ethanol yield without fundamentally altering the yeast strain structure, resolving the contradiction between productivity improvement and strain complexity
Solution Approach 2:
The patent introduces additional copies of the JID1 gene into the yeast genome or plasmids to increase gene dosage and protein expression. This copying approach enhances ethanol production capacity while maintaining a relatively simple genetic modification strategy, addressing the balance between productivity and complexity
2Productivity
If yeast engineering approaches are used to improve ethanol production, then ethanol yield increases, but the complexity of genetic modification and process control increases
Solution Approach 1:
The patent focuses on overexpressing a single key gene (JID1) rather than implementing complex multi-gene pathways. By extracting and optimizing the function of this one critical gene, the patent achieves improved ethanol production with relatively simple genetic modification, reducing manufacturing complexity while maintaining productivity gains
Solution Approach 2:
The JID1 gene overexpression system serves multiple functions: it enhances ethanol yield, improves stress tolerance, and maintains fermentation efficiency. This multi-functional approach allows a single genetic modification to address multiple production challenges simultaneously, simplifying the overall manufacturing process while improving productivity
Data Source
AI summary
Described are compositions and methods relating to modified yeast that over-expresses the J-protein, JID1. The yeast produces an increased amount of ethanol compared to otherwise identical parental cells. Such yeast is particularly useful for large-scale ethanol production from starch substrates.