CRISPR-Cas Guide RNA Architecture for Scalable Genome Editing
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Solution Overview
Problem
Current genome editing technologies, such as designer zinc fingers and TALEs, are not scalable, easy to set up, or affordable for targeting multiple positions within the eukaryotic genome, limiting their applicability in advanced biological and medical applications.
Innovation Solution
The development of a CRISPR-Cas system using engineered guide RNA molecules, such as chimeric single guide RNA (sgRNA) and dual guide RNA (dgRNA), which can be programmed to target specific DNA sequences without requiring customized proteins, enabling efficient genome editing by forming a CRISPR-Cas complex that can manipulate target nucleic acids in prokaryotic and eukaryotic cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If customized proteins are used for genome targeting (e.g., designer zinc fingers, TALEs), then targeting specificity is achieved, but device complexity and manufacturing cost increase significantly
Solution Approach 1:
The patent uses RNA copies (guide RNA) to replace complex protein-based targeting systems. Instead of designing custom proteins for each target, a simple RNA sequence complementary to the target DNA serves as the targeting element, dramatically simplifying the system while maintaining specificity
Solution Approach 2:
The Cas9 enzyme serves as a universal platform that can target any genomic location by simply changing the guide RNA sequence. This single protein performs multiple targeting functions without requiring customization, reducing device complexity while maintaining versatility
2Manufacturing precision
If customized proteins are used for each target position, then targeting precision is maintained, but productivity and scalability decrease
Solution Approach 1:
RNA sequences can be rapidly copied and modified through standard molecular biology techniques. Multiple guide RNAs can be designed and synthesized quickly to target different genomic positions, enabling high-throughput genome-wide studies without the time-consuming protein engineering required by previous methods
Solution Approach 2:
The patent changes the fundamental parameter from protein sequence design to RNA sequence design. This allows researchers to use simple nucleotide sequence changes rather than complex protein engineering, dramatically increasing productivity and enabling simultaneous targeting of multiple genes
3Adaptability or versatility
If complex protein systems are used for genome editing, then functional capability is achieved, but ease of operation and setup become difficult
Solution Approach 1:
The guide RNA acts as a simple informational copy that directs the Cas9 enzyme to target sequences. This RNA-based addressing system is much easier to design and implement than protein-based systems, allowing researchers with basic molecular biology skills to perform genome editing without specialized protein engineering expertise
Solution Approach 2:
The guide RNA serves as an intermediary between the researcher's intent and the Cas9 enzyme's action. By designing a simple RNA sequence complementary to the target, researchers can program the complex Cas9 enzyme without directly manipulating it, greatly simplifying the operational process
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
This approach simplifies genome editing methodologies, enhances targeting specificity, and accelerates the cataloging and mapping of genetic factors associated with various biological functions and diseases, providing a robust and scalable solution for genome engineering.
Implementation Method 1
a guide sequence capable of hybridizing to a target sequence in a genomic locus of interest
Data Source
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AI summary
The invention provides for systems, methods, and compositions for altering expression of target gene sequences and related gene products. Provided are structural information on the Cas protein of the CRISPR-Cas system, use of this information in generating modified components of the CRISPR complex, vectors and vector systems which encode one or more components or modified components of a CRISPR complex, as well as methods for the design and use of such vectors and components. Also provided are methods of directing CRISPR complex formation in eukaryotic cells and methods for utilizing the CRISPR-Cas system. In particular the present invention comprehends optimized functional CRISPR-Cas enzyme systems. In particular the present invention comprehends engineered new guide architectures to be used in optimized CRISPR-Cas enzyme systems.