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基本情報
登録情報 | データベース: PDB / ID: 7b1b | ||||||
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タイトル | Cryo-EM of Aedes Aegypti Toll5A dimer bound to Spz1C | ||||||
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![]() | IMMUNE SYSTEM / Mosquito vector biology / Toll receptor / LRR / Cystine knot domain | ||||||
機能・相同性 | ![]() toll-like receptor signaling pathway / transmembrane signaling receptor activity / innate immune response / extracellular space / membrane 類似検索 - 分子機能 | ||||||
生物種 | ![]() ![]() | ||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 4.23 Å | ||||||
![]() | Gangloff, M. / Hardwick, S.W. / Chirgadze, D.Y. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structure and dynamics of Toll immunoreceptor activation in the mosquito Aedes aegypti. 著者: Yoann Saucereau / Thomas H Wilson / Matthew C K Tang / Martin C Moncrieffe / Steven W Hardwick / Dimitri Y Chirgadze / Sandro G Soares / Maria Jose Marcaida / Nicholas J Gay / Monique Gangloff / ![]() ![]() 要旨: Aedes aegypti has evolved to become an efficient vector for arboviruses but the mechanisms of host-pathogen tolerance are unknown. Immunoreceptor Toll and its ligand Spaetzle have undergone ...Aedes aegypti has evolved to become an efficient vector for arboviruses but the mechanisms of host-pathogen tolerance are unknown. Immunoreceptor Toll and its ligand Spaetzle have undergone duplication which may allow neofunctionalization and adaptation. Here we present cryo-EM structures and biophysical characterisation of low affinity Toll5A complexes that display transient but specific interactions with Spaetzle1C, forming asymmetric complexes, with only one ligand clearly resolved. Loop structures of Spaetzle1C and Toll5A intercalate, temporarily bridging the receptor C-termini to promote signalling. By contrast unbound receptors form head-to-head homodimers that keep the juxtamembrane regions far apart in an inactive conformation. Interestingly the transcriptional signature of Spaetzle1C differs from other Spaetzle cytokines and controls genes involved in innate immunity, metabolism and tissue regeneration. Taken together our results explain how upregulation of Spaetzle1C in the midgut and Toll5A in the salivary gland shape the concomitant immune response. | ||||||
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-関連構造データ
関連構造データ | ![]() 11982MC ![]() 7b1cC ![]() 7b1dC C: 同じ文献を引用 ( M: このデータのモデリングに利用したマップデータ |
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