Peptide Array Pillar Substrates for 98% Coupling Efficiency
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Solution Overview
Problem
Existing microarray technologies face limitations in feature density, consistent feature quality, and the use of toxic chemicals, particularly in the synthesis of peptide arrays, which hinder high-throughput analysis of polypeptides.
Innovation Solution
A method for manufacturing peptide arrays on a porous surface with positionally-defined locations, utilizing a coupling formulation comprising a solvent, water-soluble polymer, coupling molecule, and neutralization reagent, achieving an average coupling efficiency of at least 98% per step, and using a substrate with pillars at a density of greater than 10,000/cm² to attach peptide chains of determinable sequence and intended length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If prior art peptide array synthesis methods are used, then peptide arrays can be manufactured, but feature density is limited and coupling efficiency is inconsistent
Solution Approach 1:
The patent employs a porous substrate with controlled pore size and distribution to enable high-density peptide array synthesis. The porous structure provides increased surface area while maintaining structural integrity, allowing thousands of features per square centimeter to be synthesized with consistent coupling efficiency at each position.
Solution Approach 2:
The patent optimizes multiple synthesis parameters including coupling reagent concentrations, reaction times, and washing conditions to achieve coupling efficiencies consistently above 98%. This systematic parameter optimization enables both high feature density and reliable coupling at each synthesis step.
2Ease of manufacture
If prior art synthesis methods are used, then peptide arrays can be created, but toxic chemicals are required
Solution Approach 1:
The patent replaces traditional toxic coupling reagents with water-soluble coupling agents that eliminate the need for organic solvents and hazardous chemicals. This substitution maintains effective peptide bond formation while removing harmful substances from the synthesis process, making the manufacturing procedure safer and more environmentally friendly.
3Productivity
If high feature density is achieved, then high-throughput analysis is enabled, but consistent feature quality becomes difficult to maintain
Solution Approach 1:
The patent implements preliminary surface activation and blocking steps before peptide synthesis to ensure uniform reactivity across all feature positions. This pre-treatment of the porous substrate creates consistent starting conditions for each synthesis cycle, enabling high feature density while maintaining uniform quality across all array elements.
Solution Approach 2:
The patent incorporates quality control measurements at each synthesis cycle to monitor coupling efficiency and feature uniformity. This feedback mechanism allows for real-time adjustment of synthesis parameters, ensuring that consistent feature quality is maintained even as feature density increases across the array.
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 method enhances feature density and coupling efficiency, enabling high-throughput analysis of polypeptides with improved consistency and reduces the use of toxic chemicals, facilitating applications in diagnostic microbiology and disease investigation.
Implementation Method 1
an array of features attached to a porous surface layer at positionally-defined locations, the features each comprising: a collection of peptide chains of determinable sequence and intended length, wherein within an individual feature, the fraction of peptide chains within the collection having the intended length is characterized by an average coupling efficiency for each coupling step of at least 98%
Data Source
AI summary
Disclosed herein are formulations, substrates, and arrays. Also disclosed herein are methods for manufacturing and using the formulations, substrates, and arrays. Also disclosed are methods for identifying peptide sequences useful for diagnosis and treatment of disorders, and methods for using the peptide sequences for diagnosis and treatment of disorders, e.g., celiac disorder. In certain embodiments, substrates and arrays comprise a porous layer for synthesis and attachment of polymers or biomolecules.