Lymphotoxin-β receptor (LTβR) and CD40 are members of the tumor necrosis factor family of signaling receptors that regulate cell survival or death through activation of NF-κB. These receptors transmit signals through downstream adaptor proteins called tumor necrosis factor receptor-associated factors (TRAFs). In this study, the crystal structure of a region of the cytoplasmic domain of LTβR bound to TRAF3 has revealed an unexpected new recognition motif, 388IPEEGD393, for TRAF3 binding. Although this motif is distinct in sequence and structure from the PVQET motif in CD40 and PIQCT in the regulator TRAF-associated NF-κB activator (TANK), recognition is mediated in the same binding crevice on the surface of TRAF3. The results reveal structurally adaptive “hot spots” in the TRAF3-binding crevice that promote molecular interactions driving specific signaling after contact with LTβR, CD40, or the downstream regulator TANK.
Structurally Distinct Recognition Motifs in Lymphotoxin-β Receptor and CD40 for Tumor Necrosis Factor Receptor-associated Factor (TRAF)-mediated Signaling*
Chenglong Li,P. S. Norris,C. Ni,Marnie L. Havert,E. M. Chiong,Bonnie R Tran,E. Cabezas,John Calvin Reed,A. Satterthwait,C. Ware,K. R. Ely
Published 2003 in Journal of Biological Chemistry
ABSTRACT
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- Publication year
2003
- Venue
Journal of Biological Chemistry
- Publication date
2003-12-12
- Fields of study
Biology, Medicine, Chemistry
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
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