Codon-Optimized Brazzein Yeast Expression for Thermal Stability
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Solution Overview
Problem
Current sweeteners, both artificial and natural, face challenges such as high calorie content, limited thermal stability, and unsuitable applications in food and beverages, leading to health concerns and suboptimal taste profiles, necessitating a more effective and versatile sweetener solution.
Innovation Solution
The use of codon-optimized nucleic acids in yeast expression systems for producing brazzein protein, which is thermally stable and offers improved yield and taste profile, allowing for its application in various food and beverage products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional sweeteners (artificial or natural) are used, then sweetness is provided, but thermal stability is limited and health concerns arise
Solution Approach 1:
The patent employs codon optimization to alter the genetic parameters of brazzein production, transforming the amino acid sequence to enhance thermal stability while maintaining sweetness. This parameter change in the protein structure allows the sweetener to withstand higher temperatures without degradation, resolving the contradiction between thermal stability and health safety
Solution Approach 2:
The invention uses microbial fermentation systems (yeast or bacteria) to produce brazzein as a renewable, cost-effective alternative to extracting sweeteners from natural sources. This disposable production method creates a sustainable supply of thermally stable sweetener that addresses both health concerns and manufacturing efficiency
2Object-affected harmful factors
If natural sweeteners are used, then health benefits are improved, but yield and production efficiency are reduced
Solution Approach 1:
The patent replaces traditional mechanical extraction methods from natural sources with biological production systems using codon-optimized microbial fermentation. This substitution enables scalable, high-yield production of natural brazzein sweetener while maintaining its health benefits, resolving the contradiction between natural origin and production efficiency
Solution Approach 2:
The invention performs preliminary codon optimization of the brazzein gene sequence before production, adapting it for efficient expression in chosen microbial hosts. This preparatory genetic engineering step ensures high-yield production of the natural sweetener, overcoming the limitation of low production efficiency associated with natural extraction
3Temperature
If brazzein production is optimized for yeast expression, then thermal stability is improved, but codon optimization complexity increases
Solution Approach 1:
The patent applies local quality optimization by specifically tailoring codon usage to match yeast tRNA populations and post-translational modification capabilities. This localized adaptation of the gene sequence to the host organism's characteristics enables efficient production of thermostable brazzein while managing the complexity through targeted rather than comprehensive optimization
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method provides a thermostable, low-calorie natural sweetener that maintains sweetness after heating, is suitable for diverse applications, and offers enhanced baking performance, reducing health risks associated with sugar consumption.
Implementation Method 1
The use of codon-optimized nucleic acids in yeast expression systems for producing brazzein protein
Implementation Method 2
expression in a yeast host cell an expression cassette comprising a promoter operably linked to a nucleic acid molecule encoding a brazzein
Data Source
AI summary
The present disclosure relates to codon-optimized brazzein coding sequences and the expression of brazzein and variants thereof using yeast expression systems. The disclosure also relates to methods of expression of proteins to enhance the sweetness taste profile of foods and/or beverages.