SHC Enzyme Variants for Selective Ambrox Cyclization
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Solution Overview
Problem
Existing methods for producing (−)-Ambrox and Ambra oxide using SHC enzymes are limited, and there is a need for improved methods to cyclize other substrates for fragrance compounds.
Innovation Solution
Utilizing SHC/HAC enzyme variants with specific amino acid alterations, such as W169G, A306V, and G600M, to enzymatically convert (3E,7E)-homofarnesol to (−)-Ambrox and (2,E)-Bishomofarnesol to Ambra oxide, achieving high identity or similarity to specified SEQ ID NO sequences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wild-type SHC enzymes are used for converting homofarnesol to Ambrox, then the basic cyclization function is achieved, but the conversion efficiency and product selectivity are insufficient
Solution Approach 1:
The patent applies parameter changes by modifying specific amino acid residues in the SHC enzyme sequence (positions 169, 306, and 600) to create variant enzymes with improved catalytic properties. These sequence variations directly alter the enzyme's physical-chemical parameters, resulting in enhanced conversion efficiency and product selectivity for Ambrox synthesis from homofarnesol substrates.
2Quantity of substance
If existing SHC enzyme methods are used, then cyclization of homofarnesol is achieved, but the yield and quality for fragrance production are limited
Solution Approach 1:
The patent employs parameter changes through targeted amino acid substitutions in the SHC enzyme at critical positions (169, 306, 600) to optimize both quantity and quality outcomes. The modified enzyme variants demonstrate improved catalytic performance that simultaneously enhances yield and product quality, meeting fragrance production requirements.
3Productivity
If wild-type SHC enzymes are used, then the natural substrate cyclization occurs, but the efficiency for industrial production is insufficient
Solution Approach 1:
The patent implements parameter changes by introducing specific amino acid variations in the SHC enzyme sequence that enhance industrial production efficiency. The modified enzymes maintain compatibility with existing production processes while significantly improving conversion rates and productivity, making them suitable for industrial-scale fragrance compound synthesis.
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 SHC/HAC enzyme variants enhance the efficiency and specificity of converting homofarnesol and bishomofarnesol to their respective products, providing improved yields and quality for fragrance production.
Implementation Method 1
enzymatically converting (3E,7E)-homofarnesol (EEH) or a mixture of isomers of homofarnesol comprising EEH to (−)-Ambrox
Implementation Method 2
enzymatically converting (2,E)-Bishomofarnesol (BisEEH) or a mixture of isomers of bishomofarnesol comprising BisEEH to Ambra oxide
Data Source
AI summary
Squalene Hopene Cyclase (SHC) enzymes and variants thereof and their uses for making (−)-Ambrox from homofarnesol and Ambra oxide from bishomofarnesol and the like.