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Science 29 May 1992:
Vol. 256. no. 5061, pp. 1318 - 1321
DOI: 10.1126/science.1598575
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Articles

Science, Vol 256, Issue 5061, 1318-1321
Copyright © 1992 by American Association for the Advancement of Science

articles

High-efficiency expression and solubilization of functional T cell antigen receptor heterodimers

I Engel, TH Ottenhoff, and RD Klausner

Cell Biology and Metabolism Branch, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892.

The T cell receptor (TCR) zeta chain was attached to the TCR alpha and beta extracellular domains to induce efficient expression of alpha beta heterodimers that can recognize complexes of antigen with major histocompatibility complex (MHC) molecules. Chimeric constructs expressed in RBL-2H3 cells were efficiently transported to the cell surface uniquely as disulfide-linked heterodimers. Transfectants were activated by specific antigen-MHC complexes, which demonstrated that the expressed alpha beta was functional and that CD3 was not required for antigen-MHC binding. Constructs with thrombin cleavage sites were efficiently cleaved to soluble disulfide-linked heterodimers. Thus, attachment of TCR zeta domains and protease cleavage sites to TCR alpha and beta induces expression of demonstrably functional heterodimers that can be solubilized.


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