Nucleic Acid-Crosslinked Fiber Assembly for Reversible Microtubule Control
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Solution Overview
Problem
Existing methods for controlling the assembly and movement of microtubules are limited, making it difficult to dissociate temporarily crosslinked microtubules and control their movement effectively.
Innovation Solution
A fiber assembly comprising microtubules or actin fibers crosslinked by nucleic acid fragments, allowing for controlled association and dissociation through complementary single-stranded nucleic acid fragments and the use of motor proteins like kinesins or dyneins, with optional azobenzene groups for light-controlled hybridization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If microtubules are crosslinked using ligand-receptor interaction, then the microtubules form stable assemblies and move circularly, but the crosslinked microtubules cannot be easily dissociated and movement control is limited
Solution Approach 1:
The patent uses nucleic acid hybridization parameters (complementarity, melting temperature, hybridization conditions) to control the assembly and dissociation of microtubules. By changing temperature, salt concentration, or adding complementary nucleic acid strands, the system can transition between assembled and dissociated states, providing dynamic control while maintaining stability when needed.
Solution Approach 2:
The patent introduces nucleic acid fragments as intermediary crosslinking agents between microtubules. These nucleic acid mediators can be specifically designed with complementary sequences that allow controlled hybridization and dissociation, enabling reversible assembly and disassembly of microtubule structures with precise temporal and spatial control.
2Strength
If traditional crosslinking methods are used, then fiber assembly is achieved, but the assembly cannot be temporarily dissociated and movement control is limited
Solution Approach 1:
The patent exploits changes in physical-chemical parameters (temperature, ionic strength, pH) to control nucleic acid hybridization stability. By adjusting these parameters, strong crosslinking can be achieved when needed, and the same crosslinks can be easily dissociated by parameter changes, providing both strength and operational ease.
Solution Approach 2:
The patent creates a dynamic crosslinking system where nucleic acid fragments can reversibly bind and unbind from microtubules. This dynamic behavior allows the system to transition between stable assembled states and dissociated states, enabling both strong crosslinking when required and easy dissociation when needed, unlike static traditional crosslinking methods.
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 precise control over the assembly and movement of fibers, including microtubules, by using nucleic acid hybridization and motor proteins, facilitating the creation of artificial muscles with contractile capabilities.
Implementation Method 1
nucleic acid fragments that crosslink the multiple fibers... a third single-stranded nucleic acid fragment including a region complementary to the first single-stranded nucleic acid fragment and a region complementary to the second single-stranded nucleic acid fragment hybridizes with the first single-stranded nucleic acid fragment and the second single-stranded nucleic acid fragment
Implementation Method 2
Kinesins are motor proteins that convert chemical energy obtained by hydrolysis of adenosine triphosphate (ATP) into kinetic energy
Implementation Method 3
Kinesins are motor proteins that convert chemical energy obtained by hydrolysis of adenosine triphosphate (ATP) into kinetic energy and move on microtubules
Implementation Method 4
with optional azobenzene groups for light-controlled hybridization
Data Source
AI summary
A fiber assembly includes multiple fibers and nucleic acid fragments that crosslink the multiple fibers, and the fibers are microtubules or actin fibers.