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- W4313376970 abstract "Abstract We have previously shown that CD40 causes strong activation of the c-Jun N-terminal kinase (JNK), the p38 mitogen-activated protein kinases (MAPK) and MAPKAP kinase-2, a downstream target of p38 MAPK. To identify signaling motifs in the CD40 cytoplasmic domain that are responsible for activation of these kinases, we have created a set of 11 chimeric receptors consisting of the extracellular and transmembrane domains of CD8 fused to portions of the murine CD40 cytoplasmic domain. These chimeric receptors were expressed in WEHI-231 B lymphoma cells. We found that amino acids 35–45 of the CD40 cytoplasmic domain constitute an independent signaling motif that is sufficient for activation of the JNK and p38 MAPK pathways, as well as for induction of IκBα phosphorylation and degradation. Amino acids 35–45 were also sufficient to protect WEHI-231 cells from anti-IgM-induced growth arrest. This is the same region of CD40 required for binding the TNF receptor-associated factor-2 (TRAF2), TRAF3, and TRAF5 adapter proteins. These data support the idea that one or more of these TRAF proteins couple CD40 to the kinase cascades that activate NF-κB, JNK, and p38 MAPK." @default.
- W4313376970 created "2023-01-06" @default.
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- W4313376970 date "1999-04-15" @default.
- W4313376970 modified "2023-10-13" @default.
- W4313376970 title "An 11-Amino Acid Sequence in the Cytoplasmic Domain of CD40 Is Sufficient for Activation of c-Jun N-Terminal Kinase, Activation of MAPKAP Kinase-2, Phosphorylation of IκBα, and Protection of WEHI-231 Cells from Anti-IgM-Induced Growth Arrest" @default.
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- W4313376970 doi "https://doi.org/10.4049/jimmunol.162.8.4720" @default.
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