Nucleic Acid-Mediated Iterated Branching for Library Synthesis
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Solution Overview
Problem
Current small-molecule library synthesis methods, such as solid-phase, split-pool methodologies, limit the diversity of structures that can be created due to limitations in directing specific beads to subsequent reaction conditions and purifying unreacted starting materials, constraining diversification to a single step.
Innovation Solution
A multi-step in vitro method involving nucleic acid-mediated chemistry, where templates with oligonucleotide sequences and transfer units with anti-codon sequences are combined to enable multiple branching reaction pathways, allowing for the simultaneous generation of different products in a single reaction mixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If solid-phase, split-pool methodologies are used for library synthesis, then technical advantages such as ease of operation are achieved, but the diversity of structures that can be created is limited
Solution Approach 1:
The invention segments the library synthesis process into multiple independent reaction pathways, where each pathway can be directed to produce different products. This is achieved by dividing the bead population into different groups, each subjected to specific reaction conditions, thereby enabling structural diversification beyond the limitations of traditional split-pool methods.
Solution Approach 2:
The invention adds a new dimension to library synthesis by implementing iterated branching reaction pathways. Instead of linear sequential reactions, the process branches into multiple parallel pathways at each step, creating a tree-like synthesis architecture that exponentially increases structural diversity while maintaining ease of operation through standardized reaction protocols.
2Adaptability or versatility
If specific fractions of beads are to be directed to different subsequent reaction conditions, then product diversity is improved, but the ability to purify unreacted starting material away from desired products deteriorates
Solution Approach 1:
The invention introduces an intermediary purification step using reverse phase HPLC to separate unreacted starting material from desired products after each reaction step. This intermediary purification process enables the implementation of directed reaction pathways without being constrained by purification difficulties, as the HPLC step efficiently removes unreacted beads before the next synthesis step.
3Manufacturing precision
If highly efficient reactions are used to compensate for purification limitations, then manufacturing precision is improved, but the amount of diversity that can be borne in early steps deteriorates
Solution Approach 1:
The invention performs preliminary purification of unreacted starting material using reverse phase HPLC before proceeding to subsequent reaction steps. This preliminary action removes the constraint of purification limitations, allowing the use of highly efficient reactions in early synthesis steps without compromising the diversity of structures that can be generated, as the purification step ensures clean reaction conditions for each pathway.
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 approach enables the production of a broader spectrum of multi-step products, including synthetic small molecules and polymers, by allowing multiple reaction pathways to occur simultaneously at each step, thereby increasing library diversity.
Implementation Method 1
each transfer unit comprises a reactive unit associated with an oligonucleotide sequence comprising an anti-codon capable of annealing to a codon present in at least one of the templates
Data Source
AI summary
The present invention provides methods and compositions for performing multi-step nucleic acid mediated synthesis of a highly diverse collection of molecules, for example, small molecules and polymers. In the method, in at least two steps, multiple reaction intermediates and/or products are produced in the same step by different chemical reactions.