UV-Crosslinked Nucleic Acid Nanostructure Stabilization
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Solution Overview
Problem
Existing methods for stabilizing nucleic acid nanostructures are limited, particularly in low ionic strength solutions, physiological fluids, and at elevated temperatures, and often require costly chemically modified strands or cofactors.
Innovation Solution
A novel method involving ultraviolet light-induced crosslinking of pyrimidine nucleotides to stabilize nucleic acid nanostructures, allowing for site-selective introduction of additional covalent bonds without the need for chemical modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If chemically modified strands or cofactors are used to stabilize nucleic acid nanostructures, then structural stability is improved, but manufacturing cost and process complexity increase
Solution Approach 1:
The nucleic acid nanostructure contains self-complementary sequences that can form hairpin structures with UV-absorbing pyrimidine nucleotides (thymine or cytosine) positioned to absorb UV light and induce crosslinking. This self-service mechanism eliminates the need for external cofactors or chemically modified strands, achieving both stabilization and cost reduction.
Solution Approach 2:
The invention changes the physical-chemical state of the nanostructure by introducing UV-absorbing pyrimidine nucleotides at specific positions. Upon UV irradiation, these nucleotides undergo photochemical crosslinking, transforming the structure from unstable to stabilized through a controlled parameter change (UV exposure) rather than requiring persistent chemical modifications or cofactors.
2Stability of the object's composition
If chemically modified strands or cofactors are used to stabilize nucleic acid nanostructures, then structural stability is improved, but process complexity increases
Solution Approach 1:
The embedded pyrimidine nucleotides serve as self-contained UV sensors and crosslinking agents within the nucleic acid sequence. The system requires no external cofactors, modified strands, or complex stabilization protocols - simply exposure to UV light activates the pre-positioned pyrimidines to form crosslinks, dramatically simplifying the stabilization process.
Solution Approach 2:
The pyrimidine nucleotides are pre-positioned within the nucleic acid sequence during synthesis to occupy specific locations that will become crosslinking sites. This preliminary placement of functional groups eliminates the need for post-synthesis modification or cofactor addition, reducing process complexity while ensuring effective stabilization upon UV exposure.
3Stability of the object's composition
If additional covalent bonds are introduced via chemical or enzymatic ligation, then structural stability is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The invention replaces chemical ligation methods and enzymatic processes with a photochemical mechanism. Instead of using expensive ligases or complex chemical reagents to form covalent bonds, UV light irradiation directly induces crosslinking between pyrimidine nucleotides, achieving the same stabilizing effect through a simpler, more economical physical-chemical process.
Solution Approach 2:
The invention achieves covalent bond formation through a parameter change (UV light exposure) rather than through chemical or enzymatic reactions. This transforms the manufacturing approach from complex wet-chemistry or biochemistry processes to a simple physical irradiation step, reducing both cost and complexity while achieving equivalent or superior stabilization.
4Stability of the object's composition
If additional covalent bonds are introduced via chemical or enzymatic ligation, then structural stability is improved, but process complexity increases
Solution Approach 1:
The invention substitutes complex chemical ligation protocols and enzymatic reaction systems with a straightforward photochemical crosslinking process. UV irradiation directly induces bond formation between pyrimidine nucleotides, eliminating the need for multiple reaction steps, buffer optimizations, enzyme additions, and purification procedures associated with traditional ligation methods.
Solution Approach 2:
The pyrimidine nucleotides are pre-positioned within the nucleic acid sequence to serve as built-in crosslinking sites. This preliminary arrangement of functional groups ensures that UV irradiation will automatically induce crosslinking at the correct locations without requiring external agents or complex process control, greatly simplifying the overall procedure.
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 method significantly enhances the structural stability of nucleic acid nanostructures, enabling them to maintain their shape at elevated temperatures and in low ionic strength conditions, while also providing enhanced resistance to nuclease activity.
Implementation Method 1
a step of exposing said nucleic acid nanostructure to UV irradiation, wherein said step of exposing said nucleic acid nanostructure to UV irradiation results in the formation of at least one chemical bond between two pyrimidine nucleotides
Data Source
AI summary
The present invention relates to a novel method for stabilizing nucleic acid nanostructures by curing with ultraviolet light, particularly by crosslinking pyrimidine nucleotides.