RNA Structure Detection via SHAPE-MaP Chemical Probing
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Solution Overview
Problem
Current methods for analyzing the structure of nucleic acid molecules, particularly RNA, face challenges in accurately detecting chemical modifications and understanding their three-dimensional structures, which are crucial for biological function but remain poorly understood.
Innovation Solution
The development of methods involving selective 2'-hydroxyl acylation analyzed by primer extension (SHAPE) and mutational profiling (MaP) for RNA structure analysis, using reagents like 1M7, NMIA, and DMS to identify chemical modifications and infer nucleic acid structures through massively parallel sequencing, enabling detection of multiple chemical modifications and correlated interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional RNA structure analysis methods are used, then basic secondary structure information can be obtained, but accurate detection of chemical modifications and high-resolution structural details remain elusive
Solution Approach 1:
The patent introduces an intermediary chemical modification detection system that uses selective 2'-hydroxyl acylation reagents as mediators to reveal structural information. These reagents act as intermediaries between the RNA molecule and the detection system, allowing indirect but accurate detection of chemical modifications and tertiary structural elements without requiring direct observation methods
Solution Approach 2:
The patent replaces traditional mechanical/physical structure determination methods (such as X-ray crystallography or NMR) with a chemical probing approach. By using chemical reagents to modify RNA at specific sites based on structural accessibility, the method substitutes complex physical measurement systems with simpler chemical reactions followed by sequencing
2Loss of information
If chemical reagents are used to probe RNA structure, then structural information can be obtained, but the reagents may interfere with native RNA structure and function
Solution Approach 1:
The patent applies partial action by using low concentrations of chemical reagents and controlling reaction conditions to achieve sufficient structural probing without complete saturation. This allows obtaining meaningful structural information while minimizing disruption to the RNA's native structure and biological function
Solution Approach 2:
The patent performs preliminary structural probing under controlled conditions before conducting functional assays. This allows researchers to understand the structural context and adjust experimental conditions to minimize reagent interference with native RNA function in subsequent experiments
3Quantity of substance
If traditional sequencing methods are used, then sequence information can be obtained, but detection of chemical modifications and structural variants is limited
Solution Approach 1:
The patent exploits parameter changes in the sequencing process by measuring the kinetics of reverse transcription through modified nucleotides. Different chemical modifications cause characteristic delays or stops in polymerase progression, and these kinetic parameters are used to detect and characterize the modifications with high precision
Solution Approach 2:
The patent incorporates feedback mechanisms where the sequencing data is iteratively analyzed to identify patterns indicative of chemical modifications. The detection process uses feedback from initial sequencing results to refine the identification of modified sites and to adjust experimental parameters for improved detection accuracy
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
These methods provide high-resolution, accurate secondary structure models of RNA, allowing for the identification of functional motifs and structural reconfigurations, and can analyze low-abundance nucleic acids, thereby advancing the understanding of RNA structure and function.
Implementation Method 1
synthesizing a nucleic acid using a polymerase and the provided nucleic acid as a template
Implementation Method 2
chemical modifications that stabilize the fully folded and functional tertiary structure of the nucleic acid
Data Source
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AI summary
The presently disclosed subject matter relates to technology and methods for analyzing the structure of nucleic acid molecules, such as RNA molecules. More particularly, the presently disclosed subject matter is directed to methods of, compositions for, and computer program products for nucleic acid analysis, such as RNA structure analysis.