Nucleotide Complexes for High-Yield DNA Synthesis
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Solution Overview
Problem
Current methods for large-scale enzymatic DNA synthesis face challenges with low yields and inefficiencies, particularly at high nucleotide concentrations, due to the inhibitory effects of monovalent cations and the need for additional divalent cations as cofactors.
Innovation Solution
Development of novel nucleotide complexes with a divalent cation ratio of 0.2-1.5 divalent cations per nucleotide and minimal monovalent ions, optionally combined with zwitterionic molecules, which are processed to remove polyatomic moieties from monovalent cations, allowing for higher nucleotide concentrations and improved solubility without buffering agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional nucleotide salts with monovalent cations are used, then nucleotides are soluble and can be dispersed in water, but monovalent cations inhibit DNA synthesis at high concentrations and require additional divalent cations as cofactors
Solution Approach 1:
The patent removes monovalent cations from the nucleotide complex structure, extracting the harmful component that inhibits DNA synthesis. By using only divalent cations (Mg2+, Mn2+, Ca2+) as counter-ions, the invention eliminates the inhibitory effect of monovalent cations while maintaining nucleotide solubility and stability in aqueous solutions.
Solution Approach 2:
The patent changes the ionic composition parameter from mixed monovalent/divalent cations to exclusively divalent cations. This parameter change transforms the reaction environment to be more favorable for DNA synthesis, reducing ionic strength and eliminating monovalent cation inhibition while maintaining necessary electrostatic neutralization.
2Productivity
If high nucleotide concentrations are used to improve DNA synthesis yield, then productivity increases, but monovalent cations become more inhibitory and reaction efficiency decreases
Solution Approach 1:
The patent extracts and removes monovalent cations from the nucleotide complex, eliminating the harmful factor that becomes increasingly inhibitory at high concentrations. By using only divalent cations, the invention maintains reaction efficiency even at high nucleotide concentrations (above 60 mM) where monovalent cations would otherwise cause significant inhibition.
3Productivity
If additional divalent cations are added as cofactors to compensate for monovalent cation removal, then DNA synthesis can proceed, but ionic strength increases and reaction efficiency decreases
Solution Approach 1:
The patent makes divalent cations serve multiple functions simultaneously: they act as both counter-ions to neutralize nucleotide charges and as enzymatic cofactors for DNA polymerase activity. This multi-functionality eliminates the need for separate cofactor additions, reducing total ionic strength while maintaining both electrostatic neutralization and catalytic efficiency.
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
The novel nucleotide complexes significantly enhance DNA synthesis yields and efficiency, particularly at high concentrations (above 60 mM), reducing the need for additional divalent cations and minimizing the ionic strength of the reaction mixture, thus facilitating large-scale industrial DNA production.
Implementation Method 1
due to the highly charged nature of nucleic acids, they are constantly surrounded by counter-ions to neutralise most of their charges which lessen the electrostatic repulsion between sections of sequence
Implementation Method 2
The polyatomic moiety of the monovalent cation is rendered volatile under suitable conditions such as a vacuum
Implementation Method 3
The polyatomic moiety of the monovalent cation is rendered volatile under suitable conditions such as a vacuum
Data Source
AI summary
The present invention relates to novel nucleotide complexes which enhance the enzymatic production of DNA. The nucleotide complexes includes a divalent cation at a ratio of 0.2-1.5 divalent cations per nucleotide, whilst monovalent ions (other than hydrogen or hydronium ions from any solvent) are minimal. The nucleotide complexes have desirable properties for the synthesis of deoxyribonucleic acid (DNA), in particular cell-free enzymatic synthesis of DNA, preferably on a large or industrial scale. Further, the invention includes improved processes for preparing said nucleotide complexes. Further complexes are disclosed which possess unique properties in accelerating DNA synthesis at higher concentrations, these complexes also containing zwitterion molecules.