Indexed Bead Amplification for Perfect-Sequence Nucleic Acid Recovery
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Solution Overview
Problem
Current methods for obtaining perfect-sequence nucleic acids are labor-intensive and time-consuming, particularly for longer sequences, due to errors in assembly and the need for extensive colony screening and sequencing.
Innovation Solution
A cell-free method using split-pool enzymatic DNA synthesis (EDS) to add bead-specific index sequences to clonally amplified nucleic acids, followed by high-throughput sequencing and selective amplification based on unique identifiers, allowing for efficient identification and amplification of correctly assembled nucleic acids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If colony-picking and sequencing of individual clones is used to obtain perfect-sequence nucleic acids, then the accuracy of identifying correct sequences is improved, but the time and labor required increase significantly
Solution Approach 1:
The patent divides the nucleic acid population into bead-bound compartments, where each bead carries a clonally amplified nucleic acid and a unique molecular identifier (UMI). This segmentation allows parallel processing of many samples simultaneously through high-throughput sequencing, eliminating the need for sequential colony picking and screening while maintaining identification accuracy through the UMI system.
Solution Approach 2:
The patent creates clonal amplifications of individual nucleic acids on beads, generating multiple copies of each original molecule. This copying approach allows a single original nucleic acid to be represented by many identical copies on a single bead, enabling accurate sequence determination through consensus sequencing while reducing the need to screen numerous individual colonies.
2Length of stationary object
If traditional assembly methods are used for long nucleic acid sequences, then complete assembly is achieved, but the error rate increases and perfect copies become a small portion of the total population
Solution Approach 1:
The patent performs clonal amplification of individual nucleic acid molecules before assembly, creating purified populations of identical copies on each bead. This preliminary action ensures that each bead contains only one type of sequence variant, allowing errors to be identified and corrected through consensus sequencing of the clonal population, thereby improving manufacturing precision for long sequences.
Solution Approach 2:
The patent uses unique molecular identifiers (UMIs) to track individual nucleic acid molecules through the assembly process. By comparing sequences from clonally amplified copies on each bead against the UMI, the system can identify and correct assembly errors, providing feedback that improves the accuracy of long sequence assembly and increases the proportion of perfect copies.
3Reliability
If extensive colony screening is performed to find perfect-sequence inserts, then the reliability of obtaining correct sequences is improved, but the productivity of the process decreases
Solution Approach 1:
The patent creates clonal amplifications of individual nucleic acid molecules on beads, generating multiple copies of each original sequence. This copying approach allows high-throughput sequencing to read many copies simultaneously, maintaining reliability through consensus accuracy while dramatically increasing productivity by processing thousands of samples in parallel rather than screening colonies sequentially.
Solution Approach 2:
The patent replaces the mechanical process of manual colony picking, plasmid purification, and individual sequencing with a cell-free system using beads and high-throughput sequencing. This substitution eliminates labor-intensive manual operations while maintaining sequence identification reliability through the UMI system and increases productivity by enabling parallel processing of thousands of samples in a single sequencing run.
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 significantly reduces the time and effort required to obtain perfect-sequence nucleic acids by enabling rapid identification and selective amplification of correctly assembled sequences, improving the efficiency of nucleic acid assembly processes.
Implementation Method 1
each bead comprises a capture oligonucleotide that specifically hybridizes to the adapter capture sequence
Implementation Method 2
using a first primer that hybridizes to the adapter capture sequence and a second primer that hybridizes to the adapter primer binding site
Data Source
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AI summary
Methods, systems, and devices are provided for identification and selective amplification of a correctly assembled nucleic acid comprising a sequence of interest from a mixture of assembled nucleic acids. In some aspects, the inventions use split-pool enzymatic DNA synthesis to add a bead-specific index sequence to bead-bound clonally amplified assembled nucleic acids. High-throughput sequencing is used to identify beads comprising correctly assembled, sequence-perfect nucleic acids. A correctly assembled nucleic acid may be selectively amplified using a primer comprising a sequence that is complementary to the bead-specific index sequence that is associated with the correctly assembled nucleic acid.