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ζ Phosphorylation Without ZAP-70 Activation Induced by TCR Antagonists or Partial Agonists

Madrenas, Joaquín, Wange, Ronald L., Wang, Jennifer L., Isakov, Noah, Samelson, Lawrence E., Germain, Ronald N.·1995·Science

Abstract

Small changes in the peptide-major histocompatibility complex (MHC) molecule ligands recognized by antigen-specific T cell receptors (TCRs) can convert fully activating complexes into partially activating or even inhibitory ones. This study examined early TCR-dependent signals induced by such partial agonists or antagonists. In contrast to typical agonist ligands, both an antagonist and several partial agonists stimulated a distinct pattern of ζ chain phosphorylation and failed to activate associated ZAP-70 kinase. These results identify a specific step in the early tyrosine phosphorylation cascade that is altered after TCR engagement with modified peptide-MHC molecule complexes. This finding may explain the different biological responses to TCR occupancy by these variant ligands.

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Metadata

Authors
Madrenas, J., Wange, R. L., Wang, J. L., Isakov, N., Samelson, L. E., & Germain, R. N.
Venue
Science
Published
1995-01-27
Volume
267
Issue
5197
Pages
515-518
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2095433140
Cited by
505
References
0
FWCI
28.41
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: ζ Phosphorylation Without ZAP-70 Activation Induced by TCR Antagonists or Partial Agonists. https://app.cochat.ai/papers/10.1126/science.7824949
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Madrenas, J., Wange, R. L., Wang, J. L., Isakov, N., Samelson, L. E., & Germain, R. N. (1995). ζ Phosphorylation Without ZAP-70 Activation Induced by TCR Antagonists or Partial Agonists. Science. https://doi.org/10.1126/science.7824949

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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