LAT Polices T Cell Activation
نویسندگان
چکیده
منابع مشابه
LAT palmitoylation: its essential role in membrane microdomain targeting and tyrosine phosphorylation during T cell activation.
The linker molecule LAT is a critical substrate of the tyrosine kinases activated upon TCR engagement. Phosphorylated LAT binds Grb2, PLC-gamma1, and other signaling molecules. We demonstrate that human LAT is palmitoylated and that palmitoylated LAT predominantly localizes into glycolipid-enriched microdomains (GEMs). Although the LAT transmembrane domain is sufficient for membrane localizatio...
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Little is known as to the molecular mechanisms involved with mercury intoxication at very low levels. Although the mechanism is not known, animal studies have nevertheless shown that low levels of mercury may target the immune system. Inorganic mercury (Hg2+) at very low (but non-toxic) levels can disrupt immune system homeostasis, in that genetically susceptible rodents develop idiosyncratic a...
متن کاملDynamic changes in the mobility of LAT in aggregated lipid rafts upon T cell activation
Lipid rafts are known to aggregate in response to various stimuli. By way of raft aggregation after stimulation, signaling molecules in rafts accumulate and interact so that the signal received at a given membrane receptor is amplified efficiently from the site of aggregation. To elucidate the process of lipid raft aggregation during T cell activation, we analyzed the dynamic changes of a raft-...
متن کاملGRB2 Nucleates T Cell Receptor-Mediated LAT Clusters That Control PLC-γ1 Activation and Cytokine Production
GRB2 is a ubiquitously expressed adaptor protein required for signaling downstream of multiple receptors. To address the role of GRB2 in receptor-mediated signaling, the expression of GRB2 was suppressed in human CD4+ T cells and its role downstream of the T cell receptor (TCR) was examined. Interestingly, GRB2 deficient T cells had enhanced signaling from complexes containing the TCR. However,...
متن کاملCytoskeletal protein 4.1R negatively regulates T-cell activation by inhibiting the phosphorylation of LAT.
Protein 4.1R (4.1R) was first identified in red cells where it plays an important role in maintaining mechanical stability of red cell membrane. 4.1R has also been shown to be expressed in T cells, but its function has been unclear. In the present study, we use 4.1R-deficient mice to explore the role of 4.1R in T cells. We show that 4.1R is recruited to the immunologic synapse after T cell-anti...
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ژورنال
عنوان ژورنال: Immunity
سال: 2009
ISSN: 1074-7613
DOI: 10.1016/j.immuni.2009.08.002