Microfluidic Gene Library Synthesis for High-Fidelity Long Oligonucleotides
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Solution Overview
Problem
Existing methods for gene synthesis are limited by scalability, automation, speed, accuracy, and cost, particularly in the synthesis of large gene libraries or longer oligonucleotide fragments, with a need for more efficient and less error-prone techniques.
Innovation Solution
A method for synthesizing large gene libraries with error rates less than 1 in 3000 bp and methods for partitioning and mixing liquid reagents in microfluidic scale for parallel reactions, using functionalized substrates and microstructures to facilitate high-throughput gene synthesis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional gene synthesis methods are used, then gene fragments can be synthesized, but scalability and productivity are limited
Solution Approach 1:
The synthesis process is divided into discrete modular steps (deblocking, coupling, capping) that can be performed in parallel across multiple reaction sites. The device uses arrays of individually addressable reaction chambers, allowing simultaneous synthesis of multiple gene fragments through segmented processing.
Solution Approach 2:
The invention transitions from linear sequential synthesis to a two-dimensional array architecture where reactions occur in parallel across spatial dimensions. Multiple reaction chambers are arranged in arrays, enabling simultaneous processing of numerous gene fragments by adding reagents across the entire array at once.
2Manufacturing precision
If conventional synthesis methods are used, then gene fragments can be produced, but error rate increases with length
Solution Approach 1:
Each nucleotide position is pre-functionalized with protecting groups and coupling reagents before the actual coupling reaction. The 5'-OH groups are预先 activated with phosphoramidite chemistry, ensuring that coupling conditions are optimized in advance for each position, which maintains accuracy even as chain length increases.
Solution Approach 2:
The invention replaces manual, error-prone mechanical synthesis operations with automated liquid handling systems and microfluidic reagent delivery. This substitution reduces human error and ensures consistent, reproducible coupling conditions across all reaction sites, maintaining high fidelity in longer sequences.
3Productivity
If conventional synthesis methods are used, then gene fragments can be synthesized, but cost increases for large-scale production
Solution Approach 1:
The invention uses identical reaction protocols and reagent sets across all reaction chambers in the array. Once a successful synthesis protocol is established for one gene fragment, it can be copied and applied to hundreds of other fragments simultaneously, dramatically reducing per-unit cost while maintaining high throughput.
Solution Approach 2:
Multiple reaction processes are merged into a single integrated device platform. Reagent storage, delivery, waste collection, and data acquisition are combined in one system, allowing simultaneous processing of numerous samples without requiring separate equipment for each reaction, thereby reducing overall reagent consumption and operational costs.
Data Source
AI summary
De novo synthesized large libraries of nucleic acids are provided herein with low error rates. Further, devices for the manufacturing of high-quality building blocks, such as oligonucleotides, are described herein. Longer nucleic acids can be synthesized in parallel using microfluidic assemblies. Further, methods herein allow for the fast construction of large libraries of long, high-quality genes. Devices for the manufacturing of large libraries of long and high-quality nucleic acids are further described herein.