Compartmentalized Cyclic Peptide Libraries for Functional Assay Screening
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Solution Overview
Problem
Existing methods for generating and screening cyclic peptide libraries face challenges in compatibility with pharmaceutical assays, particularly functional assays, and lack efficient methods for linking genotype and phenotype, limiting the scope of selection to binding activities.
Innovation Solution
A method for producing and screening cyclic polypeptides co-compartmentalised with their encoding polynucleotide, allowing for passive or active cyclisation within microfluidic compartments, enabling interfacing with various pharmaceutical assays and facilitating unique identification through sequencing of co-compartmentalised polynucleotides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If co-compartmentalisation of cyclic peptides with encoding polynucleotide is implemented, then linkage between genotype and phenotype is achieved enabling functional assay compatibility, but device complexity increases due to microfluidic compartment formation requirements
Solution Approach 1:
The system segments the peptide library into individual compartments (droplets or beads), each containing a single cyclic peptide and its encoding polynucleotide. This segmentation enables functional assays to be performed on individual peptides while maintaining genotype-phenotype linkage, resolving the contradiction between assay compatibility and system complexity.
Solution Approach 2:
The patent implements nested compartmentalisation where polynucleotides are encapsulated within compartments that also contain cyclic peptides. This nesting strategy allows multiple functional layers (peptide activity assessment and genotype identification) to coexist in a single integrated system, enabling versatility without proportionally increasing complexity.
2Productivity
If high-throughput screening is enabled through compartmentalisation, then productivity increases, but manufacturing precision requirements increase to ensure uniform compartment sizes and proper co-encapsulation
Solution Approach 1:
The compartmentalisation system uses self-assembling mechanisms (such as microfluidic droplet formation or bead encapsulation) that automatically generate uniform compartments without requiring external size control mechanisms. This self-organizing behavior enables high-throughput production while maintaining consistent compartment dimensions and proper peptide-nucleotide co-encapsulation.
3Adaptability or versatility
If passive or active cyclisation methods are used to generate cyclic peptides, then peptide diversity is increased, but process complexity increases due to multiple cyclisation conditions and reagents
Solution Approach 1:
The system applies different cyclisation conditions locally to specific compartments based on the desired peptide characteristics. Each compartment can undergo appropriate cyclisation treatment (passive or active) independently, allowing diverse peptide structures to be generated without requiring a single complex unified process.
4Measurement precision
If sequencing of co-compartmentalised polynucleotides is performed for identification, then measurement precision of peptide identity is improved, but loss of time occurs during the sequencing and identification process
Solution Approach 1:
The polynucleotide sequences are prepared and compartmentalised in advance with their corresponding cyclic peptides. This preliminary organisation allows rapid identification through direct sequencing of the pre-positioned polynucleotides, eliminating time-consuming isolation steps and enabling quick genotype-phenotype correlation.
Data Source
AI summary
A method for co-compartmentalising a cyclic polypeptide with a polynucleotide encoding the cyclic polypeptide, comprising the steps of a) forming a compartment containing a polynucleotide encoding the cyclic polypeptide, b) expressing a polypeptide from the polynucleotide, and c) cyclising the polypeptide. Co-compartmentalised cyclic polypeptides and encoding polynucleotides. Libraries of co-compartmentalised cyclic polypeptide and encoding polynucleotide. Methods for screening libraries of co-compartmentalised cyclic polypeptide and encoding polynucleotide. Incorporation of non-canonical nucleic acids into such libraries.