Recombinant Mogroside Biosynthesis Enzyme Pathway
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Solution Overview
Problem
Current methods for biosynthesis of mogrosides from Siraitia grosvenorii lack specificity in identifying cytochrome P450s and UGTs involved in mogroside biosynthesis, and there is a need for improved production of mogrosides in recombinant hosts for commercial use.
Innovation Solution
A recombinant host system is developed that includes genes encoding squalene epoxidase, cucurbitadienol synthase, cytochrome P450, cytochrome P450 reductase, epoxide hydrolase, and UGT enzymes to produce mogrol precursors and mogroside compounds, with specific enzymes such as CYP5491, CYP1798, and UGT1576 being used to catalyze key reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If extraction from S. grosvenorii is used for mogroside production, then natural sweeteners can be obtained, but production efficiency and commercial viability are limited
Solution Approach 1:
The patent replaces mechanical extraction methods with enzymatic biosynthesis systems. Recombinant host cells expressing specific enzyme sequences (CYP5491, CYP1798, UGT1576, etc.) catalyze the conversion of substrates to mogrosides in vitro, substituting plant extraction with controlled biochemical reactions that offer higher productivity and commercial scalability
Solution Approach 2:
The patent introduces recombinant host cells as intermediaries between substrate and final mogroside product. These engineered cells express specific enzyme sequences that mediate the biosynthetic pathway, enabling controlled production without direct plant extraction while maintaining natural product quality
2Reliability
If general cytochrome P450 and UGT enzymes are used in mogroside biosynthesis, then biosynthetic pathways can be established, but enzyme specificity and pathway efficiency are insufficient
Solution Approach 1:
The patent applies local quality by specifying particular enzyme sequences (CYP5491, CYP1798, UGT1576) with defined catalytic specificities at each step of the biosynthetic pathway. Each enzyme sequence is optimized for its specific reaction (hydroxylation, epoxidation, glycosylation), ensuring high reliability and efficiency rather than using generalist enzymes
Solution Approach 2:
The patent changes the parameter of enzyme identity by providing specific amino acid sequences for cytochrome P450 and UGT enzymes. These specific sequence parameters enable precise catalytic functions that general enzymes cannot achieve, resolving the contradiction between specificity and productivity
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 system enables efficient production of mogrol and mogroside compounds, enhancing the commercial viability of mogroside production by specifying the enzymes involved in the biosynthetic pathway and improving yield in recombinant hosts.
Implementation Method 1
a gene encoding a squalene epoxidase polypeptide
Implementation Method 2
a gene encoding a cucurbitadienol synthase polypeptide
Implementation Method 3
a gene encoding a cytochrome P450 polypeptide
Implementation Method 4
a gene encoding an epoxide hydrolase polypeptide
Implementation Method 5
a gene encoding a UGT1576 polypeptide
Data Source
AI summary
Methods for recombinant and enzymatic production of mogroside compounds and compositions containing mogroside compounds are provided by this invention.