Spinning Force System for Parallel Single-Molecule Measurement
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Solution Overview
Problem
Current methods for measuring molecular interactions, such as atomic force microscopes and optical traps, are costly, time-consuming, and limited in their ability to provide detailed information on single molecule behavior, especially in dynamic environments, as they typically require serial measurements and are not suitable for applying forces in multiple directions simultaneously.
Innovation Solution
A spinning force system that uses a benchtop centrifuge to apply centrifugal forces to samples, allowing for parallel, high-throughput measurements of single molecules with precise force control in various directions, integrated with imaging techniques for real-time observation, enabling the study of molecular interactions and mechanical properties with high temporal and spatial resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional single molecule measurement methods (AFM, optical traps) are used, then measurement precision is improved, but productivity deteriorates due to serial measurements requiring hundreds or thousands of measurements performed one at a time
Solution Approach 1:
The invention segments the measurement process by placing individual molecules on separate microparticles, allowing each particle to be independently illuminated and detected. This segmentation enables parallel measurement of multiple molecules simultaneously, transforming the serial measurement process into a parallel one while maintaining single-molecule resolution precision.
Solution Approach 2:
The invention merges multiple measurement capabilities into a single flow chamber system that can handle thousands of microparticles simultaneously. By combining sample introduction, illumination, detection, and data collection in an integrated flow-based platform, the system achieves high-throughput parallel measurements without requiring multiple separate instruments.
2Measurement precision
If optical trap systems are used for single molecule measurement, then measurement precision is improved, but device complexity and cost worsen, requiring investment of $150k or more
Solution Approach 1:
The invention replaces complex mechanical and optical trapping systems with a simpler flow-based measurement approach. Instead of using optical traps to hold and manipulate individual molecules, the system uses flowing suspensions of microparticles with molecules attached, allowing measurements to be taken as particles pass through the detection zone. This substitution dramatically reduces system complexity and cost while maintaining measurement precision.
Solution Approach 2:
The invention uses inexpensive microparticles as carriers for single molecules, replacing the need for expensive, complex positioning and manipulation systems. The microparticles serve as simple, disposable carriers that can be easily introduced into the flow chamber and discarded after measurement, significantly reducing the overall system cost while enabling precise single-molecule measurements.
3Ease of operation
If bulk solution measurement methods are used, then ease of operation is improved, but measurement precision deteriorates by reporting only average behavior and losing details of metastable states and rare events
Solution Approach 1:
The invention segments the bulk solution into individual molecular events by attaching each molecule of interest to a separate microparticle. This segmentation allows the detection system to resolve and record individual molecular interactions, metastable states, and rare events that would be averaged out in bulk measurements, while maintaining the simplicity of working with liquid solutions.
Solution Approach 2:
The invention introduces microparticles as intermediaries to carry individual molecules through the measurement system. These microparticles serve as mediators that enable the detection system to track and record detailed information about single molecular events while the molecules themselves remain in solution, combining the simplicity of solution-based measurements with the detail resolution of single-molecule techniques.
4Measurement precision
If serial single molecule measurements are performed, then measurement precision is improved, but loss of time worsens, requiring hundreds or thousands of measurements to be performed in a serial manner
Solution Approach 1:
The invention merges thousands of single-molecule measurement events into a single simultaneous experiment by flowing a suspension of microparticles through the detection zone. All particles are illuminated and detected at the same time, allowing thousands of molecular interaction measurements to be collected in parallel within minutes, dramatically reducing the time required compared to serial measurements while maintaining single-molecule precision.
Solution Approach 2:
The invention implements continuous flow of microparticle suspensions through the measurement system, ensuring that measurement activity is continuous rather than intermittent. The flowing suspension continuously delivers new particles to the detection zone, allowing the system to accumulate thousands of measurements without interruption, thereby minimizing loss of time while maintaining high measurement precision.
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
The system significantly reduces experimental time, enables the study of rare events, and provides detailed characterizations of molecular interactions, including force-dependent kinetics and mechanical properties, at a lower cost than traditional methods, facilitating the analysis of multiple interactions simultaneously.
Implementation Method 1
a centrifuge receptacle coupled to a spindle configured to rotate the centrifuge receptacle to apply a force to the sample
Implementation Method 2
a light source configured to illuminate the sample; and a detector configured to receive light from the sample
Data Source
AI summary
An apparatus for measuring a characteristic of a sample includes a sample measurement apparatus (1404), which includes a light source (1406) configured to illuminate the sample; and a detector (1412) configured to receive light from the sample. The sample measurement apparatus is sized and dimensioned to fit within a centrifuge receptacle, the centrifuge receptacle (1416) coupled to a spindle configured to rotate the centrifuge receptacle to apply a force to the sample.