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TRDC

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All listed services and products are For Research Use Only. Do Not use in any diagnostic or therapeutic applications.

Background

T cell receptor delta constant (TRDC or TCRD) encodes the constant region of the T cell receptor delta chain, approximately 150–170 amino acids in length with an estimated molecular mass approaching 19 kDa, which may increase slightly due to N-linked glycosylation. TRDC serves as a structural component of the γδ T cell receptor, in which the delta chain pairs with the TCR gamma chain through a disulfide linkage to form the antigen-recognition heterodimer. The receptor complex then interacts with the CD3 signaling apparatus to transmit activation signals following ligand recognition. Antigen specificity is primarily determined by the variable regions and CDRs of the complete γδ TCR and varies among γδ T-cell subsets, which can recognize phosphoantigens, stress-induced ligands, and other molecular targets through distinct mechanisms. In contrast to conventional αβ T cells, which commonly depend on peptide recognition in the context of MHC molecules, γδ T cells bearing TRDC-containing receptors have a role at the junction of innate and adaptive immunity and can mount rapid responses without conventional peptide-MHC recognition. TRDC-expressing γδ T cells are especially prevalent at barriers of mucosal and epithelial tissues, such as the intestinal mucosa, skin, and reproductive system, where they contribute to first-line immune surveillance against infection and cellular stress. In oncological research, γδ T cells have demonstrated cytotoxic activity against hematologic malignancies, including acute myeloid leukemia and multiple myeloma, as well as solid tumor models such as neuroblastoma and renal cell carcinoma.

Fig.1 Genomic representation of TCR loci. (OA Literature)Fig.1 Genomic representation of mouse and human T-cell receptor (TCR) loci.1

TRDC Protein Function: A Structural Architect of γδ T Cell Flexibility

TRDC regulates the various immunological pathways that extend beyond being a simple constant domain structure:

  • γδ TCR Assembly and Structural Flexibility: The TRDC sublocus encodes for the membrane-proximal immunoglobulin fold that initiates heterodimeric pairing with TCR gamma and establishes a rigid architecture critical to CD3 complex assembly. This scaffolding function mechanistically links antigen recognition with intracellular signalling, which so allows γδ T cells to very rapidly distinguish homeostatic from pathological ligands.
  • Tissue-Resident Immunity and Tumor Surveillance: This ability of TRDC-containing receptors to recognize broadly conserved stress antigens (SCFAs) and microbial metabolites is accomplished largely by circumventing the constraints imposed by classical MHC presentation. This recognition mode is independent of tumor MHC downregulation, a frequently employed immune evasion mechanism, and thus γδ T cells can serve as powerful effectors against MHC-deficient malignancies as well as intracellular pathogens.
  • Signal Transduction and T Cell Activation: Signal Transduction and T Cell Activation Capacity of γδ T cells to lead allogeneic and off-the-shelf cell therapies is enhanced through integration of novel engineered TRDC (stability, glycosylation or CD3-interaction surfaces) sequences into these universal-γδ-T approaches; a powerful new toolbox for therapeutic applications beyond the limits of classical αβ CAR-T.

TRDC Membrane Protein Product

Our catalog features a validated collection of recombinant TRDC proteins designed to support T cell receptor structural biology, receptor-assembly studies, and related immunology research. Because appropriate immunoglobulin-fold topology, cysteine pairing, and structural integrity are important considerations for studies of γδ TCR assembly, our production strategies are selected according to the requirements of individual protein formats and downstream applications. The portfolio may include wild-type TRDC, engineered variants, and selected species orthologs for structural and comparative research. Specific expression systems, sequence modifications, formulation conditions, and quality-control specifications are provided according to the corresponding product datasheet or project requirements. These recombinant TRDC proteins provide research tools for structural characterization, protein interaction studies, and investigations of γδ TCR assembly.

TRDC Protein Product

Not finding the membrane protein product you need? Contact us to start your one-stop custom service!

TRDC Stable Cell Line Product

Identifying cellular platforms that accurately recapitulate TRDC surface presentation and γδ TCR assembly is critical to unraveling innate-like immune recognition and advancing immunotherapeutics. Combining these two methods, we established a collection of TRDC stable cell lines that maintain true plasma membrane localization and correct pairing with TCR gamma at the heterodimeric level as well as functional cooperation among CD3 signaling components. In addition to constitutive wild-type TRDC, our collection includes cysteine-to-serine mutants that prevent interchain disulfide bonding interaction, naturally occurring polymorphisms impacting receptor stability and co-expression systems for reconstructing complete γδ TCR-CD3 complexes in one cell. In order to enable mechanistic interrogations of TRDC-driven signaling, we engineered reporter-coupled lines containing elements from the NFAT, NF-κB or IL-2 promoters driving luciferase, which allow for real-time quantification of TCR pathway activation in response to phosphoantigen- or antibody-mediated stimulation. For these purposes, complementary loss-of-function models (e.g., using shRNA-mediated knockdown or dominant-negative TRDC expression) are readily available for rescue experiments and synthetic lethality screening.

TRDC Stable Cell Line Product

Not finding the stable cell line product you need? Contact us to start your one-stop custom service!

TRDC Recombinant Antibody Product

We offer a complete panel of TRDC recombinant antibodies with high-affinity that have been specifically developed to keep up with the need for robust research. Developed using modern recombinant technology platforms, they provide improved specificity, increased sensitivity and compared to standard polyclonal antibodies have enhanced batch-to-batch consistency. Our TRDC recombinant antibodies are validated in multiple applications including Western Blotting (WB), ELISA, Flow Cytometry (FCM), Immunofluorescence(IF),Immunocytochemistry; ICC and enough more which can help users to accurately detect the expression level of their target protein not only within peripheral blood mononuclear cells but also tumor-infiltrating lymphocytes, lymph node homogenates as well as cell lysate. We perform antibody labeling that can specifically identify the Cδ domain and full-length δ chain to profile γδ T cell subsets as well as distinct states of paired assembly by their associated TCR. Reagents against the DE loop, the connecting peptide domain and Cδ/CD3δ interface also provide high-quality tools for detailed studies of γδ TCR structure-function relations as well as pharmacological modulation.

TRDC Recombinant Antibody Product

Not finding the recombinant antibody product you need? Contact us to start your one-stop custom service!

Product Features

  • High Purity & Activity: High purity and verified integrity for dependable downstream work.
  • Diverse Expression Systems: Choice of expression formats to match routine or specialized projects.
  • Species Reactivity: Products available for human, mouse, pig, and other species.
  • Validated Applications: Application-tested to deliver consistent signals across common lab workflows.
  • Superior Batch-to-Batch Consistency: Stringent quality controls to ensure low variability from batch to batch.
  • Customization Options: Tags/Labels/package Modifications available upon request.

Custom TRDC Membrane Protein and Antibody Discovery Services

In addition to our customized catalog offerings, Creative Biolabs provides contract protein engineering and antibody discovery services for TRDC-focused research programs:

  • Production & Validation: Cloning of the synthesized optimized gene into an expression vector, plus small-scale expression trials to help determine the best expression conditions.
  • Custom Antibody Production: Produced via large-scale expression in mammalian/insect/cell culture or bacterial expression systems, purified in detergent or reconstituted into nanodiscs.
  • Engineered Cell Lines: Creation of stable cell lines that physiologically mimic endogenous TRDC expression and activity.
  • Functional Assessment Systems: Designing and executing assays to assess protein function and ligand binding.

Frequently Asked Questions (FAQ)

  1. Do you provide stable cell lines that co-express TRDC with selected TRDV segments plus the CD3 complex to allow for continuous modeling of gamma-delta TCR antigen recognition, phosphoantigen responsiveness and thymic selection dynamics?

    Using the entire CD3 signaling machinery from separate loci have allowed us to create multi-stable lines contitutively expressing TRDC along with specific segments of T cell receptor, e.g.,TRDV. Through the batch-wise release of surface TCR density, phosphoantigen-stimulated calcium mobilization and consequent downstream ERK phosphorylation, we offer a standardized cellular platform that allows for continuous mechanistic investigation or pharmacological studies without requiring repeated transient transfection.

  2. Are TRDC variants carrying documented splice isoforms or disease-associated mutations affecting constant region folding and CD3 assembly available?

    Yes, we provide recombinant proteins and stable cell lines containing characterized alternative splice variants as well as pathogenic substitutions that disrupt the TRDC-CD3 interaction interface or changing charge distribution across transmembrane.

  3. Do your TRDC antibodies cross-react with mouse and rat orthologs for translational immunology, infectious disease & tumor immunology model studies?

    Yes, the immunogen is within a highly conserved region of mammalian species and can easily be detected in human, mouse and rat lymphoid preparations or cell lysates without needing multiple reagents to detect different species.

  4. Are Creative Biolabs'TRDC products equivalent to clinical or diagnostic use?

    No. All Creative Biolabs TRDC products and services for research use only.

Reference
  1. Rodríguez-Caparrós, Alonso, et al. "Regulation of T-cell receptor gene expression by three-dimensional locus conformation and enhancer function." International Journal of Molecular Sciences 21.22 (2020): 8478. Under Open Access license CC BY 4.0, without modification. https://doi.org/10.3390/ijms21228478
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