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Alternatively spliced T cell receptor transcripts expressed in human T lymphocytes
S Roman-Roman1, L Ferradini, O Azogui
1Laboratoire d'Hémato-Immunologie, INSERM U333, Institut Gustave-Roussy, Villejuif, France.
Molecular Immunology
|April 1, 1993
Summary
Researchers identified nine novel exons in human T cell receptor (TCR) genes using anchored-polymerase chain reaction (A-PCR). These findings reveal new insights into TCR alpha, beta, and delta transcript structures and alternative splicing.
Area of Science:
- Immunology
- Molecular Biology
- Genetics
Background:
- T cell receptors (TCRs) are crucial for adaptive immunity.
- Understanding TCR gene structure and splicing is vital for immune system research.
Purpose of the Study:
- To investigate unusual human TCR transcripts using anchored-polymerase chain reaction (A-PCR).
- To identify and characterize novel exons within TCR alpha, beta, and delta loci.
Main Methods:
- Utilized anchored-polymerase chain reaction (A-PCR) on polyclonal T cell populations.
- Analyzed complementary DNA (cDNA) sequences to identify non-standard transcripts.
- Characterized the structural features of alternatively spliced TCR transcripts.
Main Results:
- Identified 31 unusual TCR cDNAs, including alternatively spliced TCR alpha transcripts.
- Discovered ten distinct types of alternatively spliced TCR alpha transcripts with novel exons (aE1 alpha-aE5 alpha).
- Characterized 19 sterile C beta and 2 sterile C delta transcripts, revealing novel exons (aE1 beta, aE1 delta) and homology to murine sequences.
Conclusions:
- Characterized a total of nine novel exons in human TCR alpha, beta, and delta loci.
- Demonstrated unusual splicing events leading to altered TCR transcript structures.
- Provided new molecular details of TCR gene expression and regulation.