Enriched Library via Water-in-Oil Emulsion Compartmentalization
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Solution Overview
Problem
Current in vitro display technologies face challenges in efficiently enriching for binding entities with specific binding characteristics, such as potency and off-rate, due to reliance on target immobilization to solid supports, which complicates control and avidity effects.
Innovation Solution
The method involves creating an in vitro display library where binding entities are attached to nucleic acid molecules, and targets are also attached to nucleic acid molecules, with the binding step performed in solution using a water-in-oil emulsion system for compartmentalization, allowing for the fusion of bound entities and targets, thereby enriching for specific binding characteristics without solid support immobilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If target immobilization to solid support is used for selection, then binding entities can be enriched, but device complexity and control difficulty increase due to solid support requirements
Solution Approach 1:
The invention extracts the target from the solid support environment and places it in solution phase. Targets are presented as free-floating molecules rather than immobilized on surfaces, eliminating the need for complex solid support systems while maintaining enrichment capability through solution-phase binding and compartmentalized selection
Solution Approach 2:
The invention introduces water-in-oil emulsion compartments as an intermediary system. These compartments serve as discrete reaction vessels that contain targets in solution phase while providing the structural organization needed for high-throughput selection, replacing the need for solid supports with emulsion-based compartmentalization
2Reliability
If target immobilization to solid support is used, then binding entities can be selected, but measurement precision and control are reduced due to avidity effects
Solution Approach 1:
The invention removes targets from solid support surfaces where avidity effects occur, placing them in solution phase within emulsion compartments. This extraction eliminates non-specific binding and avidity effects that compromise measurement precision, allowing accurate assessment of true binding characteristics
Solution Approach 2:
The invention creates a homogeneous solution environment within each emulsion compartment where targets and binding entities interact freely without surface-induced heterogeneity. This homogeneous condition ensures that binding measurements reflect true molecular interactions rather than surface artifacts
3Reliability
If conventional selection methods are used, then some enrichment is achieved, but productivity is limited due to multiple processing steps
Solution Approach 1:
The invention merges multiple selection steps into a single integrated process. Binding, compartmentalization, and enrichment occur simultaneously within the water-in-oil emulsion system, eliminating sequential processing steps and dramatically increasing productivity while maintaining high enrichment factors
Solution Approach 2:
The invention performs preliminary compartmentalization of targets into emulsion droplets before adding the binding entity library. This preliminary organization allows all subsequent binding events to occur in pre-defined, isolated compartments, enabling parallel processing and high-throughput enrichment in a single step
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
This approach enables significant enrichment of binders, potentially achieving 1000-fold enrichment of binders over non-binders, optimizing for key binding characteristics like affinity and dissociative half-life in a controlled and homogeneous assay environment.
Implementation Method 1
with the binding step performed in solution using a water-in-oil emulsion system for compartmentalization
Data Source
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AI summary
A method for making an enriched library comprising specific nucleic acid sequence information allowing to identifying at least one binding entity that binds to at least one target wherein the specific binding entity has been present in an in vitro display library.