Modular Oligonucleotide Self-Assembly for Arbitrary Nanostructures
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Solution Overview
Problem
The existing methods for assembling nucleic acid nanostructures, such as DNA origami, require a long scaffold strand, limiting sequence and material choices and necessitating a different set of staple strands for each shape, making it inefficient for creating complex structures of arbitrary size and shape.
Innovation Solution
The development of modular methods for producing nucleic acid structures using a subset of defined oligonucleotides that self-assemble in a sequence-specific manner without the need for a longer scaffold strand, allowing for the creation of nucleic acid structures of arbitrary size, shape, and complexity through local interactions in a one-step annealing reaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If DNA origami method is used to assemble nucleic acid nanostructures, then sophisticated molecular nanostructures can be constructed, but the sequence and material choices are limited due to the requirement of long scaffold strand
Solution Approach 1:
The invention segments the long scaffold strand requirement into multiple short oligonucleotide strands (typically 20-100 nucleotides each). These short strands self-assemble through local complementary base pairing to form the desired nanostructure, eliminating the need for a single long scaffold strand and thereby expanding sequence and material choices.
Solution Approach 2:
The short oligonucleotide strands are designed with intrinsic self-complementary sequences that enable them to self-assemble into the target nanostructure without requiring external scaffold guidance. The local sequence complementarity drives the self-organization process, making the system self-sufficient and independent of long scaffold constraints.
2Adaptability or versatility
If DNA origami method is used to create different shapes, then diverse nucleic acid nanostructures can be produced, but a completely different set of staple strands is required for each shape
Solution Approach 1:
The invention creates a universal set of short oligonucleotide building blocks that can be combined in different configurations to produce multiple shapes and structures. By designing modular oligonucleotides with standardized interaction interfaces, the same library of strands can self-assemble into various nanostructures, eliminating the need for completely different staple strand sets for each shape.
Solution Approach 2:
The invention employs a hierarchical assembly approach where basic oligonucleotide units (analogous to small dolls) self-assemble into intermediate structures, which then nest together to form larger complex shapes. This nested assembly allows diverse final structures to be constructed from a common set of fundamental building blocks.
3Adaptability or versatility
If modular methods with short oligonucleotides are used, then sequence and material choices are expanded, but the structures require precise local interactions for self-assembly
Solution Approach 1:
The invention implements local quality by designing specific complementary sequence regions within each short oligonucleotide that are optimized for precise local binding. These localized interaction domains ensure high-fidelity self-assembly at each junction point, while the rest of the oligonucleotide sequence can be varied to expand material choices and structural diversity.
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
Enables the precise control and modification of nucleic acid structures by knowing the oligonucleotide sequence at each location, facilitating the design of complex shapes and sizes, and allowing for the assembly of various nucleic acid structures, including 3D shapes, by selecting a subset of oligonucleotides from a 3D canvas, thereby overcoming the limitations of traditional DNA origami techniques.
Implementation Method 1
The nucleic acid structures self-assemble in a sequence-specific manner through local interactions, typically in a one-step annealing reaction
Implementation Method 2
The nucleic acid structures self-assemble in a sequence-specific manner through local interactions, typically in a one-step annealing reaction
Data Source
AI summary
The invention involves the synthesis of nucleic acid structures of controlled size and shape and comprised of a plurality of oligonucleotides. The structures are formed, at least in part, by the self-assembly of single-stranded oligonucleotides. The location of each oligonucleotide in the resultant structure is known. Accordingly, the structures may be modified with specificity.