Catalytic Polymeric Hydrogel Flow Cells for Faster Deblocking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing nucleic acid sequencing techniques face challenges with slow deblocking kinetics of 3′ OH blocking groups, leading to prolonged sequencing cycles and potential phasing issues.
Innovation Solution
Incorporation of a catalytic polymeric hydrogel with deblocking catalysts such as acids, bases, enzymes, peptides, or DNAzymes to accelerate the cleavage of 3′ OH blocking groups, reducing sequencing cycle time and improving sequencing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional deblocking methods are used, then the sequencing process is simple, but the deblocking kinetics are slow leading to prolonged sequencing cycles
Solution Approach 1:
A catalytic polymeric hydrogel is introduced as an intermediary substance that facilitates the deblocking reaction. The hydrogel contains catalytic groups (acid, base, or nucleophilic) that actively participate in and accelerate the cleavage of blocking groups from nucleotides, significantly improving deblocking kinetics without requiring complex external catalytic systems
Solution Approach 2:
The patent modifies the chemical parameters of the deblocking environment by incorporating functional groups directly into the polymeric hydrogel structure. These functional groups (carboxylic acids, amines, hydroxyls, etc.) provide localized catalytic activity that changes the reaction parameters and accelerates deblocking kinetics
2Productivity
If conventional deblocking methods are used, then the system is simple to operate, but sequencing cycle time is prolonged
Solution Approach 1:
The patent combines multiple functions into a single polymeric hydrogel material: the hydrogel provides structural support, contains and delivers catalytic groups for deblocking, and maintains appropriate pH and ionic conditions. This merging of functions accelerates sequencing cycles while keeping the operational protocol relatively simple
Solution Approach 2:
The catalytic groups are pre-incorporated into the polymeric hydrogel structure before the sequencing reaction begins. This preliminary preparation ensures that catalytic activity is immediately available when blocking groups need to be removed, eliminating the need for separate catalytic treatment steps and reducing cycle time
3Reliability
If conventional deblocking methods are used, then the reagent system is simple, but phasing errors increase
Solution Approach 1:
The patent creates localized catalytic environments within the polymeric hydrogel network. The catalytic groups are distributed throughout the hydrogel matrix, providing localized acid, base, or nucleophilic catalysis at the site where blocking groups need to be removed. This localized action improves deblocking efficiency and reduces phasing errors without requiring complex system-wide modifications
Solution Approach 2:
The patent uses a composite polymeric hydrogel system that combines multiple functional components: the hydrogel matrix provides structural and environmental control, while embedded catalytic groups provide chemical catalysis. This composite approach enhances sequencing reliability by ensuring complete and uniform deblocking across all nucleotides
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 use of catalytic polymeric hydrogels enhances deblocking kinetics, reducing sequencing cycle time and minimizing phasing errors, thereby improving the overall sequencing process.
Implementation Method 1
a catalytic polymeric hydrogel on the substrate, the catalytic polymeric hydrogel including a deblocking catalyst; wherein the catalyst accelerates cleavage of a blocking group
Data Source
AI summary
An example of a kit includes a flow cell and a cleavage mix. An example flow cell includes a substrate; a catalytic polymeric hydrogel on the substrate, the catalytic polymeric hydrogel including a deblocking catalyst; and an amplification primer attached to the catalytic polymeric hydrogel. The deblocking catalyst accelerates cleavage of a blocking group of a 3′ OH blocked nucleotide introduced to the flow cell and incorporated into a template strand attached to the amplification primer. An example of the cleavage mix includes a component to initiate cleavage of the blocking group.