Enzymatic DNA Repair for Reliable Digital Data Recovery
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Solution Overview
Problem
DNA storage media is prone to damage from various sources, making it difficult to recover digital information due to errors and damage to the DNA molecules, especially for long-term storage conditions.
Innovation Solution
Exposure of damaged DNA to a repair mixture containing enzymes such as DNA polymerase, DNA ligase, and endonuclease under suitable reaction conditions to repair and enhance the number of intact DNA molecules available for PCR amplification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If DNA is stored for long-term under protective conditions, then storage duration is extended, but DNA damage accumulates making information recovery difficult
Solution Approach 1:
The patent applies preliminary action by performing enzymatic repair on DNA molecules before they are subjected to PCR amplification and sequencing. The repair mixture containing DNA polymerase, DNA ligase, and endonuclease is applied in advance to prevent and repair damage that would otherwise accumulate during storage, thereby maintaining high information recovery reliability even after long-term storage.
2Quantity of substance
If DNA is exposed to repair enzymes, then the number of intact DNA molecules increases, but the complexity of the repair process increases
Solution Approach 1:
The patent merges multiple DNA repair functions into a single integrated repair mixture that contains DNA polymerase, DNA ligase, and endonuclease together. This combination allows simultaneous repair of different types of DNA damage (base mismatches, strand breaks, bulky adducts) in one step, increasing the number of intact DNA molecules while minimizing the complexity of the repair process.
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 enzymatic repair significantly increases the number of DNA molecules that can be successfully amplified by PCR, allowing for more effective recovery of digital information, potentially quadrupling the amount of recoverable DNA.
Implementation Method 1
The DNA is repaired by exposure to a repair mixture which contains one or more enzymes such as DNA polymerase, DNA ligase, and endonuclease(s)
Data Source
AI summary
One or more enzymes are used to repair damage in synthetic DNA molecules that encode digital information. The enzymes are included in a repair mixture containing one or more of DNA polymerase, DNA ligase, T4 Endonuclease, Endonuclease IV, Endonuclease VIII, and uracil glycosylase. The repair mixture may also contain one or more of a buffering solution, oxidized nicotinamide adenine dinucleotide (NAD+), and deoxyribose nucleoside triphosphates (dNTPs). The synthetic DNA molecules are incubated with the repair mixture for approximately four hours. Use of the repair solution allows recovery of the digital information from damaged DNA molecules.