Structural basis of TLR5-flagellin recognition and signaling.
Structural basis of TLR5-flagellin recognition and signaling.
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DOI:
10.1126/science.1215584
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发表时间:
2012-02-17
期刊:
影响因子:
--
通讯作者:
Wilson IA
中科院分区:
文献类型:
--
作者:
Yoon SI;Kurnasov O;Natarajan V;Hong M;Gudkov AV;Osterman AL;Wilson IA
Toll-like receptor 5 (TLR5) binding to bacterial flagellin activates NF-κB signaling and triggers an innate immune response to the invading pathogen. To elucidate the structural basis and mechanistic implications of TLR5-flagellin recognition, we determined the crystal structure of zebrafish TLR5, as a VLR-hybrid protein, in complex with the D1/D2 fragment of Salmonella flagellin, FliC, at 2.47 Å resolution. TLR5 interacts primarily with the three helices of the FliC D1 domain using its lateral side. Two TLR5-FliC 1:1 heterodimers assemble into a 2:2 tail-to-tail signaling complex that is stabilized by quaternary contacts of the FliC D1 domain with the convex surface of the opposing TLR5. The proposed signaling mechanism is supported by structure-guided mutagenesis and deletion analysis on CBLB502, a therapeutic protein derived from FliC.
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影响因子:
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作者:
通讯作者:
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DOI:
10.1073/pnas.0502040102
发表时间:
2005-06-28
影响因子:
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作者:
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