Nucleic Acid Nanostructures via Scaffold and Staple Strand Self-Assembly
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Solution Overview
Problem
Current methods for creating nanostructures from nucleic acids face challenges in achieving high-yield, complex shapes and patterns due to requirements for precise stoichiometry, purification, and optimization of sequences, limiting their complexity and scalability.
Innovation Solution
A method involving a single-stranded polynucleotide scaffold and complementary helper/staple strands that self-anneal to form desired bends and angles, allowing for the creation of complex nanostructures with high yield and flexibility in design, using a bottom-up approach that does not require expensive equipment or clean room facilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional methods are used to create nucleic acid nanostructures, then manufacturing precision can be achieved, but device complexity and scalability are limited due to requirements for precise stoichiometry, purification, and optimization
Solution Approach 1:
The patent divides the nanostructure fabrication process into two distinct components: a long single-stranded polynucleotide scaffold that forms the structural framework, and multiple short helper strands that direct folding and stabilize the structure. This segmentation allows the complex structural design to be separated from the folding instructions, enabling greater complexity without proportionally increasing manufacturing difficulty. The scaffold provides the structural precision while the helper strands encode the complexity of the desired shape.
Solution Approach 2:
The helper strands serve as intermediaries between the simple linear scaffold and the complex target nanostructure. These short oligonucleotides bind to specific regions of the scaffold and bring distant segments together, mediating the formation of bends, angles, and three-dimensional arrangements. This intermediary mechanism allows precise control over structural complexity without requiring direct manipulation of the entire scaffold sequence.
2Manufacturing precision
If traditional nucleic acid nanostructure methods are used, then structural control is maintained, but productivity and scalability are reduced due to purification requirements and optimization needs
Solution Approach 1:
The system employs self-service through autonomous self-assembly. The helper strands contain encoded information about the target structure and automatically direct the folding of the scaffold into the correct configuration without external intervention. The scaffold and helper strands self-assemble into the desired nanostructure through complementary base pairing, eliminating the need for purification steps and extensive optimization that would otherwise be required to achieve structural control.
3Adaptability or versatility
If complex nanostructures are generated using traditional methods, then structural diversity is achieved, but the requirement for precise stoichiometry and purification increases process complexity
Solution Approach 1:
The helper strands are pre-designed with sequences that encode the desired structural information before the assembly process begins. Each helper strand is synthesized with specific complementarity to regions of the scaffold that need to be brought together. This preliminary encoding of structural instructions in the helper strand sequences allows for rapid generation of diverse nanostructure designs by simply changing the helper strand sequences, without requiring complex process optimization for each new structure.
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 generation of complex nanostructures with high yield and scalability, exceeding the complexity of previously achieved nanostructures, suitable for various applications including nanocircuits, sensors, and biological systems, with the ability to incorporate nanoparticles and biological agents.
Implementation Method 1
the helper/staple strands self anneal with the single stranded polynucleotide scaffold into a structural unit
Implementation Method 2
a plurality of helper/staple strands each being designed to be at least partially complementary to the single stranded polynucleotide scaffold
Implementation Method 3
a subset of oligonucleotide helper/staple strands are chosen to bind the polynucleotide scaffold in two or more positions and bring these separate regions of the polynucleotide scaffold together to form a desired bend
Implementation Method 4
a subset of the oligonucleotide helper/staple strands are chosen to have binding sites that constrain crossovers and contact points between helices to form desired angles commensurate with the helical twist of the chosen type of scaffold:helper/staple strand duplex
Implementation Method 5
a domain of the structural unit comprises parallel helices held together by a periodic pattern of crossovers spaced so that the distance between crossovers formed by two consecutive oligonucleotide helper/staple strands is an odd number of half turns apart
Implementation Method 6
domains of the structural unit are connected by stacking interactions between blunt-ended helices
Data Source
AI summary
The disclosure relates to methods and composition for generating nanoscale devices, systems, and enzyme factories based upon a nucleic acid nanostructure the can be designed to have a predetermined structure.