Enzyme-Based Polynucleotide Selection by Interaction Duration
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Solution Overview
Problem
Existing methods for selecting polynucleotides based on size are limited in their ability to efficiently separate and characterize polynucleotides across a wide range of lengths, particularly for applications like sequencing, PCR product formation, and genotyping, and often require labor-intensive gel electrophoresis or have size limitations with functionalized silica particles and PEG methods.
Innovation Solution
A method utilizing nucleic acid handling enzymes to selectively bind to polynucleotides based on their movement along the polynucleotide length, allowing for the selection of desired lengths, integrity, and adaptation by monitoring enzyme binding or unbinding after a defined time period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual gel electrophoresis is used for polynucleotide size selection, then separation accuracy is improved, but labor intensity and time consumption increase
Solution Approach 1:
The method uses the polynucleotide's own physical properties (size, charge) to enable automatic separation through electrophoresis, eliminating the need for manual intervention in the separation process itself. The system self-regulates separation based on inherent molecular characteristics.
Solution Approach 2:
The invention replaces manual mechanical operations (manual gel handling, visual inspection, manual selection) with an automated electrophoresis system that uses electrical fields to separate and identify polynucleotides based on their size, converting mechanical labor into an automated electro-phoretic process.
2Productivity
If automated electrophoresis instruments are used for DNA size selection, then productivity is improved, but device complexity and cost increase
Solution Approach 1:
The electrophoresis instrument is designed to perform multiple functions: separation of polynucleotides by size, detection of separated fragments, and automated selection of desired size ranges. This multi-functionality reduces the need for separate dedicated devices for each operation.
Solution Approach 2:
The system uses adjustable electrophoresis parameters (voltage, current, run time, gel concentration) to optimize separation for different polynucleotide size ranges, allowing a single instrument to handle diverse applications without requiring multiple specialized devices.
3Productivity
If functionalized silica particles or PEG methods are used for DNA size selection, then processing speed is improved, but size selection range and precision are limited
Solution Approach 1:
The method changes the selection mechanism from size-based filtration (silica/PEG) to electrophoretic mobility-based separation, where polynucleotides are separated according to their charge-to-size ratio. This allows precise size selection across a broader range by adjusting electrophoresis conditions rather than being constrained by physical filter pore sizes.
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 rapid and efficient separation and characterization of polynucleotides of specific lengths and integrity, facilitating downstream applications such as sequencing and genotyping without the limitations of conventional methods.
Implementation Method 1
allowing a nucleic acid handling enzyme to move along multiple polynucleotides in a sample for a defined time period
Data Source
AI summary
A method for selecting polynucleotides, the method comprising: allowing a nucleic acid handling enzyme to move along multiple polynucleotides in a sample for a defined time period, wherein the enzyme is loaded onto each of the multiple polynucleotides and wherein one or more molecule of the enzyme moves along each of the multiple polynucleotides; and selecting polynucleotides based on whether or not the enzyme reaches the end of and/or unbinds from the polynucleotides in the defined time period.