QSOX1 mRNA Degraders for Precise RNA Binding Site Mapping
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Solution Overview
Problem
Current methods are inadequate for effectively profiling RNA binding sites in cells and identifying specific RNA targets, particularly in cancer cells, which are crucial for understanding RNA structure and function.
Innovation Solution
A method involving covalent chemistry with diazirine and alkyne moieties, followed by irradiation and treatment with azide moieties, to form triazolyl-bound RNA, allowing for transcriptome-wide mapping of RNA binding sites using gel electrophoresis or fluorescence imaging, and selective enrichment of target RNA.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If covalent chemistry with diazirine and alkyne moieties is used for RNA binding site mapping, then measurement precision of RNA binding sites is improved, but device complexity and procedure complexity increase
Solution Approach 1:
The method segments the RNA binding site mapping process into distinct chemical steps: (1) diazirine moiety incorporation into the small molecule, (2) UV irradiation to generate carbene for covalent binding, (3) alkyne-azide click chemistry for labeling. This segmentation allows each step to be optimized independently while maintaining overall precision.
Solution Approach 2:
The patent uses triazolyl-bound RNA as an intermediary species that forms during the click chemistry reaction between the alkyne-containing small molecule and azide-labeled RNA. This intermediary provides a stable, detectable complex that maintains the precise binding information while enabling downstream analysis through gel electrophoresis or fluorescence imaging.
2Loss of information
If transcriptome-wide mapping methods are applied to identify RNA targets, then information completeness about RNA structure and function is improved, but loss of time and experimental duration increase
Solution Approach 1:
The method performs preliminary UV irradiation to generate carbene species that immediately and covalently bind to RNA targets, locking in binding information before cellular processes can alter RNA structure or location. This preliminary covalent attachment ensures that subsequent transcriptome-wide analysis captures the true in vivo binding states without time-dependent changes.
Solution Approach 2:
The patent changes the chemical state of the small molecule through UV irradiation (generating carbene from diazirine) and through click chemistry (forming triazolyl bonds), creating highly stable covalent attachments that persist throughout downstream processing. This parameter change from transient to permanent binding enables comprehensive transcriptome-wide mapping without time loss from binding dissociation.
3Measurement precision
If selective enrichment of target RNA is performed, then purity of identified RNA targets is improved, but manufacturing precision of the enrichment process decreases
Solution Approach 1:
The method applies local quality enhancement by using the triazolyl-bound RNA complex as a specifically labeled target that can be selectively enriched. The azide-alkyne click chemistry provides localized chemical modification at the exact binding site, enabling highly specific enrichment of true RNA targets while leaving non-specifically bound molecules unenriched. This local chemical tagging improves purity without sacrificing overall process precision when proper controls are used.
Solution Approach 2:
The patent creates a chemical copy or surrogate of the RNA-small molecule complex through the triazolyl linkage, which serves as a stable, detectable representation of the original binding event. This copied complex can be enriched and analyzed without disturbing the native RNA structure or function, maintaining both purity and reproducibility of results.
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 precise identification and enrichment of RNA targets in cancer cells, such as breast cancer cells, providing insights into RNA structure and function, and potential therapeutic applications.
Implementation Method 1
irradiating the mixture
Implementation Method 2
treating the irradiated mixture with a fluorescent dye comprising an azide moiety or an agarose comprising an azide moiety under conditions wherein triazolyl-bound RNA is formed
Implementation Method 3
evaluating the resulting triazolyl-bound RNA is by gel electrophoresis
Implementation Method 4
evaluating the resulting triazolyl-bound RNA is by fluorescence imaging
Data Source
AI summary
The present disclosure provides compounds of the formulae herein (e.g., Formulae (I) or (II)), and pharmaceutically acceptable salts thereof, which are degrader compounds of Quiescin Sulfhydryl Oxidase 1 (QSOX1) mRNA. The present disclosure also provides pharmaceutical compositions and kits comprising the compounds, or pharmaceutically acceptable salts thereof, and methods of treating or preventing diseases. Related compounds and methods useful in probing RNA targets and studying molecular recognition patterns between RNA and ligands are described.