Parallel Polynucleotide Synthesis Under Enzyme Aggregation Constraints
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Solution Overview
Problem
Existing enzymatic polynucleotide synthesis methods face challenges such as enzyme adherence to surfaces, stringent temperature and pH control, enzyme aggregation, batch-to-batch variability, and foam/bubble formation, which hinder automation and efficiency in multi-step synthesis reactions.
Innovation Solution
A system and apparatus for parallel enzymatic synthesis of polynucleotides using template-free polymerases in reaction chambers with filters, a waste manifold, fluid delivery system, and control system to manage pressure differentials and reagent delivery, along with liquid level sensors for monitoring and corrective actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If enzymatic synthesis is used to avoid chemical synthesis limitations, then synthesis conditions become milder and handling is simplified, but enzyme adherence to surfaces and aggregation occur causing inactivity and clogging
Solution Approach 1:
The patent introduces a surfactant as an intermediary substance that mediates between the enzyme and the reaction environment. The surfactant prevents enzyme aggregation and adherence to surfaces by reducing surface tension and providing steric stabilization, thereby maintaining enzyme activity and preventing clogging while preserving the mild synthesis conditions
Solution Approach 2:
The patent modifies the physical-chemical parameters of the reaction system by adding surfactants that change the surface properties and interfacial tension. This parameter change prevents enzyme aggregation and surface adherence without altering the fundamental enzymatic reaction conditions, thus maintaining reliability while preserving ease of manufacture
2Productivity
If automated synthesis apparatus is used to improve efficiency, then productivity increases, but foam and bubble formation inhibits reagent transfer and separation
Solution Approach 1:
The surfactant acts as an intermediary that modifies the foam properties of the reaction mixture. By controlling foam formation and stability, the surfactant prevents excessive bubble formation that would interfere with automated reagent transfer, while still allowing the high-speed automated synthesis process to proceed efficiently
3Reliability
If stringent temperature and pH control is implemented to maintain enzyme activity, then synthesis reliability improves, but device complexity increases
Solution Approach 1:
The surfactant provides self-service functionality by stabilizing the enzyme under a broader range of temperature and pH conditions. This self-protection mechanism reduces the need for complex active control systems, as the enzyme-maintaining function is partially embedded in the surfactant-enzyme complex itself, thereby reducing device complexity while preserving reliability
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 efficient, automated synthesis of multiple polynucleotides with predetermined sequences by addressing enzyme-related issues, ensuring consistent reaction conditions and minimizing reagent transfer inhibition, thereby enhancing synthesis yield and reliability.
Implementation Method 1
a filter that retains the synthesis support and that is operationally associated with the outlet so that reaction solutions exiting the reaction chamber pass through the filter
Implementation Method 2
a waste manifold operationally associated with the outlets of the reaction chambers such that reaction solutions are removed from the reaction chambers and enter the waste manifold whenever a positive pressure differential is establish between the reaction chambers and the waste manifold
Data Source
AI summary
The invention is directed to systems, apparatus and kits for automated synthesis of a plurality of polynucleotides in an array of reaction chambers using a template-free polymerase. In some embodiments, adaptive elements and processes are provided to monitor and control disruption of the synthesis process and fluid movement by enzyme aggregation.