Two-Component Vector Library for TCR ORF Assembly
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Solution Overview
Problem
The complexity of T-cell receptor (TCR) diversity and the challenges in capturing and manipulating TCR sequences for high-throughput testing and therapeutic applications, particularly due to the large degree of diversity generated during TCR recombination, hinder the development of effective TCR-based therapies and diagnostics.
Innovation Solution
A pre-assembled two-component vector library system comprising Variable-Constant entry vectors and Joining donor vectors, along with a synthetic DNA oligonucleotide duplex encoding TCR complementarity determining region 3 (CDR3), enables the rapid and cost-effective generation of full-length TCR open reading frames (ORFs) through a restriction enzyme digestion/ligase cycle reaction, facilitating TCR ORF reconstitution and engineering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional PCR-based methods are used to generate TCR ORFs, then sequence capture can be achieved, but the process is time-consuming and expensive
Solution Approach 1:
The TCR gene segments (V, C, J) are divided into separate pre-assembled vector components. The V-C entry vector contains the variable and constant regions, while the J donor vector contains the joining region. This segmentation allows independent preparation and verification of each segment, enabling rapid assembly through restriction enzyme digestion and ligation without requiring PCR amplification of the entire ORF.
Solution Approach 2:
The V-C entry vectors and J donor vectors are pre-assembled and prepared in advance with appropriate restriction sites. This preliminary preparation of modular vector components allows for rapid cloning of TCR ORFs by simply mixing the pre-prepared vectors with the CDR3 oligonucleotide and performing a single ligation reaction, eliminating the time-consuming PCR amplification step.
2Manufacturing precision
If traditional cloning methods are used for TCR ORFs, then full-length sequences can be obtained, but the cost and complexity increase
Solution Approach 1:
The cloning system is segmented into two main vector components (V-C entry vector and J donor vector) plus a CDR3 oligonucleotide. Each segment is independently designed and prepared, simplifying the overall cloning process. The segmentation allows for systematic assembly through restriction enzymes and ligase, reducing the complexity compared to traditional full-length PCR cloning while maintaining full-length ORF accuracy.
Solution Approach 2:
The V-C entry vectors are designed with universal features including multiple cloning sites, selection markers, and expression elements that can accommodate different TCR chains (alpha, beta, gamma, delta). The standardized vector backbone and restriction sites allow the same basic system to be used for cloning any TCR ORF, reducing the need for custom vector construction for each new TCR sequence.
3Adaptability or versatility
If diverse TCR sequences are generated through recombination, then functional diversity is achieved, but capturing and manipulating these sequences becomes challenging
Solution Approach 1:
The diverse TCR sequences are captured by dividing them into standardized segments (V, C, J regions) that fit into corresponding vector components. The V-C entry vector library and J donor vector library are designed to accommodate the natural diversity of TCR gene segments through standardized restriction sites and cloning regions, making it easy to manipulate and assemble diverse sequences without customizing the vector system for each variant.
Solution Approach 2:
The CDR3 oligonucleotide serves as an intermediary component that connects the V-C entry vector and J donor vector. This standardized oligonucleotide mediator contains the hypervariable CDR3 region and flanking sequences with restriction sites, allowing easy assembly of diverse TCR sequences by simply changing the CDR3 oligonucleotide sequence while keeping the vector components constant.
4Productivity
If high-throughput TCR testing is implemented, then therapeutic development accelerates, but the cost and resource requirements increase
Solution Approach 1:
The TCR library is segmented into reusable V-C entry vector components and J donor vector components that can be mixed and matched. This segmentation allows high-throughput generation of TCR ORFs by simply combining different pre-prepared vector components in parallel reactions, reducing the need for individual vector construction for each TCR sequence and thereby reducing overall resource requirements.
Solution Approach 2:
The restriction enzyme digestion and ligation system allows for efficient recovery and reuse of vector components. After assembly, the parental vectors that are not incorporated into the final construct can be recovered and reused for additional cloning reactions, reducing the need for continuous synthesis of new vector materials and lowering resource consumption for high-throughput applications.
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 system allows for rapid and efficient generation of TCR ORFs, enabling novel workflows for affinity and functional maturation, and provides a robust tool for TCR functional analysis and engineering, overcoming the limitations of existing methods in capturing and manipulating TCR sequences.
Implementation Method 1
restriction enzyme digestion / ligase cycle reaction
Implementation Method 2
restriction enzyme digestion / ligase cycle reaction
Data Source
Figure 1A~1Aiii
Figure 1B~1Biv
Figure 2
AI summary
A combined system comprising two separate components, wherein a first com- ponent is a vector carrying variable and constant (V-C) T-cell receptor (TCR) gene segments, and a second component is a vector carrying joining (J) TCR gene segments. The combined system may be modified so that said first com ponent is a modified V-C entry vector encoding a first TCR chain, the system further comprises a fourth and a fifth component, wherein the fourth component comprises a Bidirectional Terminator (BiT) donor vector, and the fifth compo- nent comprises a modified V-C entry vector encoding a second TCR chain complimentary to said first TCR chain.