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Bell, Jessica K.; Askins, Janine; Hall, Pamela R.; Davies, David R.; Segal, David M.
Proceedings of the National Academy of Sciences - PNAS, 06/2006, Letnik: 103, Številka: 23Journal Article
Pathogen recognition by Toll-like receptors (TLRs) initiates innate immune responses that are essential for inhibiting pathogen dissemination and for the development of acquired immunity. The TLRs recognize pathogens with their N-terminal ectodomains (ECD), but the molecular basis for this recognition is not known. Recently we reported the x-ray structure for unliganded TLR3-ECD; however, it has proven difficult to obtain a crystal structure of TLR3 with its ligand, dsRNA. We have now located the TLR3 ligand binding site by mutational analysis. More than 50 single-residue mutations have been generated throughout the TLR3-ECD, but only two, H539E and N541A, resulted in the loss of TLR3 activation and ligand binding functions. These mutations locate the dsRNA binding site on the glycan-free, lateral surface of TLR3 toward the C terminus and suggest a model for dsRNA binding and TLR3 activation.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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