Single-Molecule Barcode Detection for Protein Evolution
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Solution Overview
Problem
Current directed protein evolution technologies face limitations in identifying nucleic acids and proteins with desired properties through bulk experiments, necessitating more precise and efficient methods for characterizing and screening these molecules.
Innovation Solution
The method involves contacting an analyte with barcode recognition molecules specific to nucleic acid index sequences, detecting signal pulses indicative of binding interactions, and determining the analyte's identity based on these interactions, allowing for the identification of novel proteins or nucleic acids with specific properties using single-molecule measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bulk experiments are used to identify nucleic acids and proteins with desired properties, then high-throughput screening is achieved, but measurement precision and the ability to distinguish individual molecule characteristics are lost
Solution Approach 1:
The patent segments the bulk population into individual single-molecule units by immobilizing them on a surface array. Each analyte is isolated and assigned a unique barcode, enabling individual characterization while maintaining high-throughput capabilities through parallel processing of multiple single molecules across the array.
Solution Approach 2:
The patent introduces barcodes as intermediary elements that link the phenotypic characteristics of single analyte molecules to their genotypic identification. These barcodes serve as mediators that enable the tracking and identification of individual molecules throughout the screening process, bridging the gap between single-molecule measurement and high-throughput data collection.
2Measurement precision
If single-molecule measurements are implemented to characterize analytes precisely, then measurement precision and identification accuracy are improved, but device complexity and experimental difficulty increase
Solution Approach 1:
The patent employs universal barcode recognition molecules that can identify multiple different barcode sequences through a single detection system. The barcode recognition molecules are designed with universal binding capabilities that allow one detection apparatus to characterize diverse analytes, reducing the need for multiple specialized devices while maintaining single-molecule precision.
Solution Approach 2:
The patent utilizes changes in binding kinetics parameters (association and dissociation rates) of barcode recognition molecules as a readout for barcode identification. By monitoring kinetic parameters rather than requiring complex structural analysis, the system achieves precise single-molecule identification using relatively simple detection equipment that measures binding dynamics over time.
3Adaptability or versatility
If multiple barcode recognition molecules are used to identify different nucleic acid sequences, then identification versatility is improved, but the complexity of detecting and measuring binding interactions increases
Solution Approach 1:
The patent merges the detection of multiple barcode recognition molecule binding events into a single integrated measurement system. By detecting binding interactions in real-time using a unified apparatus that monitors kinetic signals, the system identifies multiple barcodes simultaneously without requiring separate detection systems for each barcode type, thereby reducing measurement complexity while maintaining versatility.
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 precise identification and characterization of proteins and nucleic acids with desired properties at the single-molecule level, enhancing the efficiency and accuracy of protein evolution processes by distinguishing between different nucleic acid sequences and their binding kinetics.
Implementation Method 1
the first barcode recognition molecule specifically binds to the first nucleic acid index sequence and the second barcode recognition molecule specifically binds to the second nucleic acid index sequence
Data Source
AI summary
Aspects of the disclosure provide methods and compositions for determining the identity of an analyte using molecular barcodes and single-molecule directed evolution of target biomolecules (e.g., proteins or aptamers).