The Journal of Immunology, Vol 139, Issue 6 1952-1959, Copyright © 1987 by American Association of Immunologists

ARTICLES

Complexity of T cell receptor recognition sites for defined alloantigens

J Borst, E de Vries, H Spits, JE de Vries, AW Boylston and EA Matthews

Three monoclonal antibodies react with the T cell receptor on the tumor line HPB-ALL and in addition with 3 to 13% of human peripheral blood T cells of normal donors. These antibodies are shown to react with an epitope encoded by the V beta 5 family of T cell receptor beta-chain variable region gene segments. Cells expressing V beta 5 gene segments can have cytotoxic or helper function, be of the T4+ or T8+ phenotype, and have specificity for either class I or class II major histocompatibility complex alloantigens. Seven T cell clones were generated, which express V beta 5 and are specific for the HLA-A2 molecule. With the use of these clones, we illustrate how isoelectric focusing can be used to analyze T cell receptor alpha- and beta-chain structure. The seven clones recognize five distinct conformational determinants on HLA-A2. They procure different binding sites by the use of different alpha-chains, J beta sequences, or both.

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