Engineered Transaminase Polypeptides for Solvent-Stable Chiral Amine Synthesis
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Solution Overview
Problem
Wild-type transaminases exhibit instability under industrially useful conditions, poor substrate recognition, and low product yields, making them unsuitable for commercial production of chiral amine compounds.
Innovation Solution
Engineered transaminase polypeptides with specific amino acid residue differences, enhancing solvent and thermal stability, and improved stereoselectivity for efficient conversion of keto substrates to chiral amines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wild-type transaminases are used, then the enzyme structure is simple and easy to obtain, but the enzyme exhibits instability under industrially useful conditions and poor substrate recognition
Solution Approach 1:
The patent applies parameter changes by modifying specific amino acid residues in the transaminase sequence to improve enzyme stability and substrate recognition. The engineered transaminase contains specific substitutions at positions 14, 17, 20, 23, 53, 56, 77, 86, 107, 110, 134, 138, 149, 163, 167, 186, 189, 195, 210, 211, 248, 259, 260, 277, 291, 305, 309, 315, 342, 351, 354, 358, 361, 362, 365, 367, 385, 388, 389, 392, 400, 401, 403, 404, 405, 406, 408, 415, 417, 420, and 422 compared to wild-type, which resolves the contradiction between simplicity and stability.
Solution Approach 2:
The patent applies local quality by making specific localized amino acid substitutions at particular positions in the enzyme sequence rather than global modifications. This targeted approach improves specific functional properties (stability, substrate recognition) while maintaining the overall enzyme structure, thus balancing simplicity with improved performance.
2Productivity
If wild-type transaminases are used, then the enzyme is easy to obtain, but the enzyme exhibits low product yields
Solution Approach 1:
The patent improves product yield by changing the amino acid sequence parameters of the transaminase through specific substitutions at multiple positions. These parameter changes enhance catalytic efficiency and product formation, resolving the contradiction between ease of manufacture and productivity.
3Stability of the object's composition
If engineered transaminase with specific amino acid residue differences is used, then solvent and thermal stability are enhanced, but the enzyme sequence becomes more complex
Solution Approach 1:
The patent resolves this contradiction by making specific, targeted amino acid substitutions at defined positions rather than random or extensive modifications. This controlled parameter change approach achieves enhanced solvent and thermal stability while limiting sequence complexity to only the necessary changes.
Solution Approach 2:
The patent applies local quality by implementing specific amino acid substitutions at particular positions (14, 17, 20, 23, 53, 56, 77, 86, 107, 110, 134, 138, 149, 163, 167, 186, 189, 195, 210, 211, 248, 259, 260, 277, 291, 305, 309, 315, 342, 351, 354, 358, 361, 362, 365, 367, 385, 388, 389, 392, 400, 401, 403, 404, 405, 406, 408, 415, 417, 420, 422) to improve stability without unnecessarily increasing overall sequence complexity.
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 engineered transaminases demonstrate increased activity, stability, and product tolerance, enabling high-yield production of chiral amines under industrial conditions.
Implementation Method 1
Transaminases (E.C. 2.6.1) catalyze the transfer of an amino group, a pair of electrons, and a proton from an amino donor compound to the keto group of an amino acceptor compound
Implementation Method 2
The transaminase catalyzes the transfer of the primary amine group of the amino donor compound (A) to the keto group of the amino acceptor compound (B)
Data Source
AI summary
The present disclosure provides engineered transaminase polypeptides useful for the synthesis of chiral amine compounds under industrially relevant conditions. The disclosure also provides polynucleotides encoding the engineered transaminase polypeptides, host cells capable of expressing the engineered transaminases, and methods of using the engineered transaminases for the production of chiral amine compounds.