Structural basis for ligand recognition and activation of RAGE.

Structural basis for ligand recognition and activation of RAGE.
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DOI:
10.1016/j.str.2010.05.017
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发表时间:
2010-10-13
期刊:
Structure (London, England : 1993)
影响因子:
--
通讯作者:
Fritz G
Fritz G
中科院分区:
其他
文献类型:
--
作者:
Koch M;Chitayat S;Dattilo BM;Schiefner A;Diez J;Chazin WJ;Fritz G

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晚期糖基化终末产物 (RAGE) 受体是一种参与炎症过程的模式识别受体,与糖尿病并发症、肿瘤生长和神经退行性疾病相关。 RAGE 在与多种配体结合后诱导细胞信号转导事件,例如糖化蛋白、β 淀粉样蛋白、HMGB1 和 S100 蛋白。人 RAGE 胞外域 VC1 配体结合区的 X 射线晶体结构以 1.85 Å 分辨率测定。通过异核核磁共振波谱监测,用 S100B 滴定将 VC1 配体结合表面映射到结构上。这些 NMR 化学位移扰动被用作受限对接计算的输入,以生成 VC1-S100B 复合体的模型。总之,VC1 分子在晶体中的排列和互补的生化研究表明自缔合在 RAGE 功能中的作用。我们的结果增强了对 S100 蛋白与 RAGE 结合的功能结果的理解,并提供了对受体如何激活的机制模型的深入了解。
The receptor for advanced glycation end products (RAGE) is a pattern recognition receptor involved in inflammatory processes and is associated with diabetic complications, tumor outgrowth, and neurodegenerative disorders. RAGE induces cellular signaling events upon binding of a variety of ligands, such as glycated proteins, amyloid-β, HMGB1, and S100 proteins. The X-ray crystal structure of the VC1 ligand-binding region of the human RAGE ectodomain was determined at 1.85 Å resolution. The VC1 ligand-binding surface was mapped onto the structure from titrations with S100B monitored by heteronuclear NMR spectroscopy. These NMR chemical shift perturbations were used as input for restrained docking calculations to generate a model for the VC1-S100B complex. Together, the arrangement of VC1 molecules in the crystal and complementary biochemical studies suggest a role for self-association in RAGE function. Our results enhance understanding of the functional outcomes of S100 protein binding to RAGE and provide insight into mechanistic models for how the receptor is activated.
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