Writable Nucleic Acid Polymers for High-Density Data Storage
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Solution Overview
Problem
Current methods for encoding data in DNA are inefficient due to limitations in yield, strand length, time, and cost, with existing DNA synthesizers producing relatively short strands and requiring excessive reagents and time for data encoding, which restricts the density and speed of data storage.
Innovation Solution
Development of writable nucleic acid polymers with convertible residues that can be chemically altered using a conjugated polymerase and sensitizer, allowing for longer strands and more efficient data encoding through chemical alteration with light or redox signals, enabling the production of nucleic acids several thousands of bases long with improved data storage density and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If chemical or enzymatic synthesis is used to produce DNA strands of arbitrary sequence, then data encoding capability is achieved, but strand length is limited to roughly 200 nucleotides and yield is inefficient
Solution Approach 1:
The patent segments the synthesis process into two distinct phases: first, synthesizing relatively short oligonucleotide fragments (which can be efficiently produced by existing synthesizers), and second, assembling these fragments into much longer strands through ligation or extension reactions. This segmentation allows each phase to operate in its optimal efficiency zone while achieving the overall goal of long strand production.
Solution Approach 2:
The patent performs preliminary synthesis of standardized oligonucleotide fragments with specific features (such as overhangs or adapter sequences) before the final assembly step. These pre-prepared fragments are designed to be easily ligatable or extendable, enabling efficient construction of long strands without requiring the synthesizer to directly produce the final long sequence.
2Manufacturing precision
If stepwise nucleotide addition is used to achieve high stepwise yields, then manufacturing precision is improved, but time consumption increases to 1-5 minutes per step
Solution Approach 1:
The patent divides the data encoding process into fragment synthesis (where high precision stepwise addition is applied to ensure accuracy) and fragment assembly (where time-consuming stepwise operations are replaced by faster ligation or extension reactions). This segmentation maintains manufacturing precision where needed while dramatically reducing overall encoding time.
Solution Approach 2:
The patent uses template-directed synthesis where a template strand guides the assembly of complementary strands. This copying approach allows parallel processing of multiple fragments and enables enzymatic reactions to proceed faster than de novo stepwise synthesis, reducing encoding time while maintaining accuracy through template guidance.
3Manufacturing precision
If chemical DNA synthesis is used to produce short strands, then manufacturing precision is maintained, but data storage density is limited due to small information per molecule
Solution Approach 1:
The patent merges multiple precisely-synthesized oligonucleotide fragments into a single long strand through ligation or enzymatic extension. This combining process preserves the manufacturing precision of the individual fragments while achieving high data storage density in the final long strand, as each fragment contributes to the overall information capacity.
Solution Approach 2:
The patent incorporates data encoding information into the design of individual oligonucleotide fragments during the preliminary synthesis stage. By pre-encoding data in these accurately synthesized fragments and then assembling them, the system achieves both high precision (from the synthesis step) and high density (from the combined long strand).
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 the creation of long nucleic acid polymers that can encode more data per molecule, increasing storage density and speed while reducing costs, and allows for stable long-term archiving of data.
Implementation Method 1
a polymerase to promote chemical alteration of the convertible residue
Implementation Method 2
In many embodiments, data is written into a nucleic acid via chemical alteration of the linked convertible residues using a conjugated polymerase together with light or redox signals
Data Source
AI summary
Nucleic acid polymers for data storage and related methods are provided. In some embodiments, the nucleic acid polymers are writable for data, and in other embodiments, the nucleic acid polymers are encoded with data when synthesized. Generally, a writable polymer may contain one or more convertible residues (e.g., chemically alterable group) bits that are enabled to provide a data code. Various methods can be utilized to generate a writable nucleic acid polymer, or a data encoded nucleic acid polymer. Various methods can be utilized to encode a nucleic acid polymer by selectively modifying convertible residues via a light or redox source with an enzyme (e.g., polymerase) conjugated to a sensitizer. Various methods of reading an encoded nucleic acid polymer are also described herein.