Peptide Microarray Cyclization Detection via Protein Tags
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Solution Overview
Problem
Current methods for identifying and maturing cyclic peptides are inefficient, as they lack systematic approaches for screening large numbers of cyclic peptides and determining successful cyclization, which is crucial for drug discovery, especially for 'undruggable' targets, and existing peptide microarrays have limitations in density and cost.
Innovation Solution
Development of peptide microarrays with tags that activate upon cyclization, allowing for the detection of successful cyclization reactions by increasing binding interaction with detectable target proteins, and methods for designing and generating peptide tags to measure cyclization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If peptide microarrays are used to screen cyclic peptides, then the ability to identify peptide binders is improved, but the capability to detect successful cyclization is insufficient
Solution Approach 1:
The patent introduces a detectable target protein as an intermediary that specifically binds to the peptide tag only when it is in the cyclized conformation. This mediator enables indirect detection of cyclization success through binding assays, resolving the contradiction by providing reliable cyclization detection without fundamentally altering the microarray system's core functionality.
Solution Approach 2:
The patent employs detectable target proteins that produce measurable signals (such as fluorescent or colorimetric changes) upon binding to cyclized peptide tags. This allows visual or instrumental detection of cyclization status, transforming the invisible structural change into a detectable signal while maintaining microarray simplicity.
2Productivity
If peptide density on microarrays is increased, then screening capacity is improved, but manufacturing cost increases
Solution Approach 1:
The patent segments the detection function into a separate detectable target protein component that binds to a specific peptide tag. This allows the microarray to screen multiple peptides simultaneously at high density without requiring complex detection mechanisms for each spot, thereby increasing screening capacity while keeping manufacturing costs manageable through standardized tag-protein pairs.
3Reliability
If cyclic peptides are synthesized to improve target affinity and specificity, then drug discovery effectiveness is improved, but the ability to identify and mature cyclic peptides systematically is insufficient
Solution Approach 1:
The patent incorporates a detectable peptide tag into the cyclic peptide structure during synthesis. This preliminary action enables subsequent systematic identification and maturation of cyclic peptides by allowing rapid screening of multiple candidates using the detectable target protein, thereby improving identification efficiency without compromising the therapeutic peptide's target affinity and specificity.
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
Enables efficient identification and confirmation of cyclic peptide binders, improving the quality control of peptide libraries and facilitating the discovery of therapeutic peptides by measuring cyclization completion, thus overcoming the limitations of existing technologies.
Implementation Method 1
the at least one cyclic peptide comprises a peptide tag sequence capable of binding to a detectable target protein
Data Source
AI summary
This invention relates to peptide microarrays, methods of generating peptide microarrays, and methods of identifying peptide binders using microarrays. More specifically, this invention relates to peptide microarrays, methods of generating peptide microarrays, and methods of identifying peptide binders using microarrays wherein the microarrays comprise cyclic peptides. The invention also relates to methods and compositions for detecting the formation of cyclized peptides from linear peptides on a microarray by contacting the microarray with a detectable protein. The cyclized peptides include tags that are activated upon cyclization, facilitating the detection of successful cyclization reactions. In additional aspects, the invention relates to developing fragmented peptide tags that, upon cyclization, bind to detectable proteins. Additionally, the invention relates to methods of generating linear and cyclic peptides subarrays on a microarray.