TY - JOUR

T1 - TCR alpha beta chains associate with the plasma membrane independently of CD3 and TCR zeta chains in murine primary T cells

AU - Zhang, J

AU - Salojin, K

AU - Gao, J X

AU - Cameron, M

AU - Geisler, C

AU - Delovitch, T L

N1 - Keywords: Animals; Antigens, CD3; Calcium-Binding Proteins; Calnexin; Cell Differentiation; Cell Membrane; Humans; Hybridomas; Immune Sera; Jurkat Cells; Lymphocyte Activation; Macromolecular Substances; Membrane Proteins; Mice; Mice, Inbred BALB C; Mice, Inbred C57BL; Receptors, Antigen, T-Cell; Receptors, Antigen, T-Cell, alpha-beta; T-Lymphocyte Subsets

PY - 1998

Y1 - 1998

N2 - The TCR is a multisubunit complex composed of the clonotypic alpha/beta disulfide-linked heterodimer and noncovalently linked invariant CD3 gamma epsilon and CD3 delta epsilon and TCR zeta chains. Recent studies demonstrate that the surface expression of CD3 components can occur independently of the clonotypic TCR complexes in both thymocytes and splenic T cells. In this study, we report that free noncovalently associated TCR alpha beta heterodimers that exist independently of CD3 and TCR zeta chains are expressed on the cell surface of immature thymocytes and peripheral T cells, but not of T cell lines and T cell hybridomas. This suggests that the regulation of surface expression of TCR alpha beta heterodimers differs between primary T cells and T cell lines or T cell hybridomas. The isolation and biochemical characterization of surface clonotype-independent CD3 complexes and free membrane-associated TCR alpha beta complexes may provide a structural basis for the quantitative difference in amount of T cell proliferation stimulated by anti-CD3 epsilon and anti-TCR beta.

AB - The TCR is a multisubunit complex composed of the clonotypic alpha/beta disulfide-linked heterodimer and noncovalently linked invariant CD3 gamma epsilon and CD3 delta epsilon and TCR zeta chains. Recent studies demonstrate that the surface expression of CD3 components can occur independently of the clonotypic TCR complexes in both thymocytes and splenic T cells. In this study, we report that free noncovalently associated TCR alpha beta heterodimers that exist independently of CD3 and TCR zeta chains are expressed on the cell surface of immature thymocytes and peripheral T cells, but not of T cell lines and T cell hybridomas. This suggests that the regulation of surface expression of TCR alpha beta heterodimers differs between primary T cells and T cell lines or T cell hybridomas. The isolation and biochemical characterization of surface clonotype-independent CD3 complexes and free membrane-associated TCR alpha beta complexes may provide a structural basis for the quantitative difference in amount of T cell proliferation stimulated by anti-CD3 epsilon and anti-TCR beta.

M3 - Journal article

C2 - 9743355

VL - 161

SP - 2930

EP - 2937

JO - Journal of Immunology

JF - Journal of Immunology

SN - 0022-1767

IS - 6

ER -