Title : Differential cytosolic tail dependence and intracellular fate of T-cell receptors internalized upon activation with superantigen or phorbol ester.

Pub. Date : 1997 May

PMID : 9300530






4 Functional Relationships(s)
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1 We investigated the role of internalization motifs located in the cytosolic region of CD3 gamma in the internalization of TCR complexes induced by enterotoxin superantigens, anti-TCR mAbs or phorbol esters. Phorbol Esters T cell receptor beta variable 20/OR9-2 (non-functional) Homo sapiens
2 We found that serine126 and the di-leucine motif (Leu131-Leu132) are required for phorbol-ester-induced TCR downregulation, but they are not necessary for enterotoxin superantigen or antibody-induced TCR downregulation. Phorbol Esters T cell receptor beta variable 20/OR9-2 (non-functional) Homo sapiens
3 We found that serine126 and the di-leucine motif (Leu131-Leu132) are required for phorbol-ester-induced TCR downregulation, but they are not necessary for enterotoxin superantigen or antibody-induced TCR downregulation. Phorbol Esters T cell receptor beta variable 20/OR9-2 (non-functional) Homo sapiens
4 Confocal microscopy analysis reveals that TCR complexes accumulate in an early endocytic/recycling compartment upon activation of cells with phorbol esters, whereas TCRs internalized upon activation with superantigen or anti-TCR mAbs are routed to lysosomes. Phorbol Esters T cell receptor beta variable 20/OR9-2 (non-functional) Homo sapiens