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Magnetic DNA random access memory with nanopore readouts and exponentially-scaled combinatorial addressing.
Billy Lau1,2, Shubham Chandak3, Sharmili Roy1
1Division of Oncology, Department of Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA.
Scientific Reports
|May 25, 2023
Summary
Researchers developed Magnetic DNA-based Random Access Memory (MDRAM) for efficient DNA data storage. This system allows repeated, targeted data retrieval using nanopore sequencing, overcoming key limitations in DNA data retrieval.
Area of Science:
- Biotechnology
- Data Storage
- Bioinformatics
Background:
- DNA data storage faces challenges like DNA consumption, basecalling errors, and scaling read operations.
- Current methods often lead to molecular loss and limited accessibility of stored data.
Purpose of the Study:
- To introduce Magnetic DNA-based Random Access Memory (MDRAM), a novel system for efficient and repeatable DNA data retrieval.
- To overcome limitations in molecular consumption and scaling of read operations in DNA data storage.
Main Methods:
- Synthesized DNA was conjugated to magnetic agarose beads for targeted retrieval.
- Nanopore-based sequencing was employed for data readout, utilizing soft information from raw signals.
- A convolutional coding scheme was implemented to enhance data accuracy.
Main Results:
- MDRAM enables repetitive, efficient, and targeted readouts of DNA data files.
- The system preserves DNA analytes and maintains high data readout quality.
- Information reading costs were comparable to existing sequencing methods despite higher error rates.
Conclusions:
- MDRAM offers a robust solution for repeatable DNA data access, addressing critical challenges in the field.
- The developed proto-filesystem demonstrates exponentially scalable data addressing using minimal primers.
- This advancement paves the way for practical and efficient DNA-based data storage systems.
