T-Cell Receptor Sequencing (TCR Sequencing)
What Is T-Cell Receptor Sequencing (TCR Sequencing)?
T-cell receptor (TCR) sequencing is an advanced next-generation sequencing (NGS) technique designed to profile the immense diversity and clonal composition of T-cell populations. This is achieved by sequencing the variable regions of the TCR alpha (TRA) and beta (TRB) chains—regions shaped by somatic recombination of Variable (V), Diversity (D), and Joining (J) gene segments. The resulting repertoire reflects the immune system’s ability to recognize an almost limitless array of antigens.
Unlike conventional immune assays, TCR-Seq delivers a high-resolution snapshot of adaptive immunity, capturing both the breadth and depth of T-cell clonotypes. This enables researchers to:
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Map immune responses at a molecular level
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Identify antigen-specific T-cell populations involved in disease or therapy response
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Uncover patterns of immune repertoire evolution across timepoints, treatments, or conditions
By targeting the highly variable complementarity-determining region 3 (CDR3)—the portion directly interacting with antigens—TCR-Seq provides a powerful window into immune recognition and specificity.
Advantages of TCR Sequencing
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Full-Length TCR Coverage: Using 5’ RACE, we capture complete V(D)J regions, including CDR1 and CDR2, enhancing insights into MHC affinity.
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Low PCR Bias: Our optimized workflows minimize amplification artifacts, ensuring accurate representation of clonal frequencies.
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Customizable Approaches: Bulk or single-cell, RNA or DNA—we adapt to your research design.
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Cross-Species Compatibility: Human, mouse, and other model organisms supported.
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Flexible Sequencing Platforms: Illumina MiSeq PE300, HiSeq PE150/250, and other configurations available.
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High Sensitivity & Depth: Detect rare clones with confidence using tailored read depths.
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Advanced Bioinformatics: Full analysis pipeline with clonotype calling, diversity metrics, and publication-ready reports.
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Collaborative Scientific Support: Our experts consult with you at every stage, from project design to data interpretation.
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Fast Turnaround: Results in as little as 2–3 weeks, with expedited options for urgent timelines.
TCR-Seq has become indispensable in both research and translational medicine. By allowing researchers to track T-cell clonal expansion, assess immune repertoire diversity, and study T-cell dynamics in response to treatment, it’s been transformative in the following areas:
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Cancer Immunotherapy: Monitoring tumor-infiltrating lymphocytes (TILs), tracking responses to checkpoint inhibitors, and identifying biomarkers of therapeutic efficacy.
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Infectious Disease Research: Characterizing T-cell responses to viral, bacterial, or parasitic infections, including emerging pathogens.
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Autoimmune Disorders: Detecting autoreactive clonotypes driving diseases like multiple sclerosis, type 1 diabetes, and rheumatoid arthritis.
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Vaccine Development: Evaluating T-cell responses to new vaccines and guiding antigen design.
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Immune Monitoring: Measuring clonal dynamics in clinical trials, post-transplantation, or during immune reconstitution.
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Allergy and Hypersensitivity Studies: Mapping T-cell responses in allergic conditions to uncover immune triggers and improve therapeutic strategies.
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General Immunology Research: Advancing our understanding of T-cell biology, antigen recognition, and adaptive immunity at both population and single-cell levels.
What is TCR Sequencing Used For?
TCR Sequencing with AUGenomics
Sample Submission
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Accepted sample types: PBMCs, whole blood, RNA, or gDNA
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Minimum input requirement: ≥ 50 ng of high-quality RNA or DNA
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Recommended depth: 100,000–1,000,000 reads/sample, depending on study goals
Please refer to our Shipping Guidelines for project-specific guidance.
Turnaround Time
Standard turnaround time is 2–3 weeks from sample QC approval. Expedited options are available depending on project scope and sequencing depth.
Frequently Asked Questions (FAQs)
Q: What’s the difference between bulk and single-cell TCR sequencing?
A: Bulk TCR sequencing provides population-level repertoire information, while single-cell TCR sequencing enables pairing of alpha/beta chains and gene expression insights per cell.
Q: Can TCR sequencing be used for MRD (Minimal Residual Disease) monitoring?
A: Yes. Tracking patient-specific clonotypes is a sensitive and reliable approach for MRD detection, especially in hematologic malignancies.
Q: How do I choose between RNA and DNA-based TCR sequencing?
A: RNA-based methods capture actively transcribed receptors, while DNA-based methods provide a more stable measure of clonality and total repertoire.
Got more questions? Contact our team and get a free consultation anytime. info@augenomics.com
Glossary of Terms
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TCR: T-cell receptor
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Clonotype: A unique TCR sequence representing a T-cell clone
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PBMCs: Peripheral blood mononuclear cells
