Dioxygenase Mutants for High-Yield (2S,3R)-3-Hydroxypipecolic Acid
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wild-type L-proline-3-hydroxylase exhibits low catalytic efficiency in converting L-pipecolic acid to (2S,3R)-3-hydroxypipecolic acid, necessitating an improvement in enzymatic synthesis processes.
Innovation Solution
Mutating specific amino acids at positions 97 and 43 of the L-proline-3-hydroxylase enzyme, such as replacing arginine at position 97 with methionine and asparagine at position 43 with various amino acids, enhances the enzyme's catalytic efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If wild-type L-proline-3-hydroxylase is used to catalyze the conversion of L-pipecolic acid to (2S,3R)-3-hydroxypipecolic acid, then the reaction can proceed with high selectivity, but the catalytic efficiency is low
Solution Approach 1:
The patent applies parameter changes by mutating specific amino acid residues (positions 97 and 43) in the L-proline-3-hydroxylase enzyme to alter its catalytic properties. The R97M mutation at position 97 and N43T mutation at position 43 modify the enzyme's active site characteristics, enhancing substrate binding affinity and catalytic turnover rate while preserving enantioselectivity for producing (2S,3R)-3-hydroxypipecolic acid.
2Productivity
If traditional chemical synthesis methods are used to produce (2S,3R)-3-hydroxypipecolic acid, then the production capacity can be increased, but toxic by-products are generated and environmental problems occur
Solution Approach 1:
The patent replaces traditional chemical synthesis mechanisms with enzymatic catalysis. The engineered L-proline-3-hydroxylase mutant catalyzes the hydroxylation of L-pipecolic acid under mild physiological conditions, eliminating the need for hazardous chemicals and toxic reagents while maintaining high production capacity through improved catalytic efficiency.
3Manufacturing precision
If traditional chemical synthesis methods are used, then the synthesis can be completed, but high energy consumption is required
Solution Approach 1:
The patent changes the reaction conditions from harsh chemical synthesis parameters to mild enzymatic reaction parameters. The mutant enzyme operates at ambient temperature and physiological pH, eliminating the need for high energy input required by traditional chemical methods while achieving complete synthesis of (2S,3R)-3-hydroxypipecolic acid.
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 mutant L-proline-3-hydroxylase achieves a molar yield of (2S,3R)-3-hydroxypipecolic acid up to 88%, significantly higher than the wild-type enzyme, with specific activity improved by 2.42 to 3.83 times under optimized conditions.
Implementation Method 1
the catalytic activity of the L-proline-3-hydroxylase used in the present disclosure is modified by enzyme engineering
Implementation Method 2
Fe(II)/α-ketoglutarate-dependent dioxygenases are powerful and versatile biocatalysts
Data Source
AI summary
By mutating arginine at position 97 and asparagine at position 43 of a wild type L-proline-3-hydroxylase, a mutated L-proline-3-hydroxylase is obtained. The mutated L-proline-3-hydroxylase comprises a variant of the wild-type L-proline-3-hydroxylase having SEQ ID NO:1, which comprises a substitution of the arginine corresponding to position 97 (R97) of SEQ ID NO:1 and a substitution of the asparagine corresponding to position 43 (N43) of SEQ ID NO:1; wherein the amino acid substituted into the mutated L-proline-3-hydroxylase at position R97 is methionine, and wherein the amino acid substituted into the mutated L-proline-3-hydroxylase at position N43 is selected from the group consisting of threonine (T), alanine (A), valine (V), serine(S), aspartic acid (D), and lysine (K).