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Related Experiment Videos

The human T-cell receptor.

O Acuto, M Fabbi, A Bensussan

    Journal of Clinical Immunology
    |May 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

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    Researchers identified the human T-cell antigen receptor (TCR) as a complex of Ti and T3 molecules. This discovery provides structural insights into T-cell function and immune response regulation.

    Area of Science:

    • Immunology
    • Molecular Biology
    • Cell Biology

    Background:

    • The human T-cell antigen receptor (TCR) is crucial for adaptive immunity.
    • Previous studies suggested a complex structure involving T-cell surface glycoproteins.

    Purpose of the Study:

    • To identify the molecular components of the human TCR.
    • To elucidate the structural basis of T-cell recognition and activation.

    Main Methods:

    • Utilized cloned antigen-specific T lymphocytes.
    • Employed monoclonal antibodies targeting surface glycoprotein components.
    • Performed N-terminal amino acid sequencing and molecular cloning of the Ti beta subunit.

    Main Results:

    • Identified the human TCR as a complex of a clonotypic 90-kD Ti heterodimer and invariant 20- and 25-kD T3 molecules.

    Related Experiment Videos

  • Quantified approximately 30,000-40,000 Ti and T3 molecules per T lymphocyte.
  • Demonstrated that Ti alpha and beta subunits are encoded by separate genes and possess variable regions.
  • Showed homology between the Ti beta subunit and immunoglobulin light chains, with gene rearrangement specific to T lymphocytes.
  • Revealed that TCR triggering activates T-cell proliferation via IL-2 production and signaling.

    • Conclusions:

    • The T3-Ti complex forms the structural basis for T-cell immunologic competence.
    • Findings offer insights into human T-cell growth regulation and disease states.
    • The TCR structure and function are critical for antigen recognition and immune responses.