Cell-Free Iterative Site Saturation for High-Throughput Enzyme Evolution
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Solution Overview
Problem
Existing methods for directed evolution of enzymes are low-throughput and labor-intensive, making it difficult to rapidly evolve enzymes with new-to-nature functionalities.
Innovation Solution
A method involving cell-free protein synthesis and machine learning-guided protein engineering is used to generate variant proteins with desired functionalities, utilizing iterative site saturation mutagenesis and high-throughput DNA expression templates, combined with computer systems for analyzing and predicting beneficial mutations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional directed evolution methods are used to generate enzyme variants, then sequence-defined DNA libraries can be constructed, but the process is low-throughput and labor-intensive
Solution Approach 1:
The patent replaces traditional mechanical DNA cloning and sequencing methods with a cell-free protein synthesis system that directly translates DNA templates into proteins. This substitution of mechanical/biological processes with a chemical/cell-free system enables high-throughput generation of enzyme variants without requiring complex DNA library construction and sequencing procedures.
Solution Approach 2:
The patent extracts and eliminates the labor-intensive steps of DNA library construction, sequencing, and cloning by using a streamlined cell-free expression system. Only the essential DNA templates are synthesized and directly expressed, removing unnecessary intermediate steps and significantly increasing throughput while reducing complexity.
2Productivity
If traditional high-throughput screening methods are used, then many enzyme variants can be screened, but the process remains labor-intensive and time-consuming
Solution Approach 1:
The patent performs preliminary actions by pre-synthesizing DNA templates with desired mutations using cell-free DNA synthesis, and pre-preparing the expression system. This allows rapid generation and screening of multiple enzyme variants in parallel without time-consuming DNA cloning and sequencing steps, significantly reducing the overall screening time while maintaining high throughput.
3Adaptability or versatility
If iterative site saturation mutagenesis is performed to evolve enzymes with new functionalities, then desired functionality can be achieved, but the process requires extensive sequencing and analysis
Solution Approach 1:
The patent uses copying by directly synthesizing DNA templates with desired mutations through cell-free DNA synthesis, eliminating the need for traditional cloning and sequencing to obtain sequence information. The DNA templates are directly created with the required mutations, and the corresponding proteins are expressed without requiring extensive sequencing analysis to verify sequences, thus reducing information loss while maintaining the ability to evolve enzymes with new functionalities.
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
Enables the rapid generation of variant enzymes with altered function, specificity, and activity, capable of synthesizing a range of high-value molecules and pharmaceuticals, while reducing the screening burden through computational prediction.
Implementation Method 1
expressing the variant protein using cell-free protein synthesis
Data Source
AI summary
Disclosed are methods, compositions, systems, and protein compounds for the directed evolution of enzymes and proteins. The method comprising generating variant protein with a desired functionality, comprising one or more DNA expression templates comprising nucleic acid sequences encoding a variant protein, expressing the variant protein using cell-free protein synthesis; and analyzing one or more parameters associated with the variant protein.