The Structure of the Necrosome RIPK1-RIPK3 Core, a Human Hetero-Amyloid Signaling Complex.

The Structure of the Necrosome RIPK1-RIPK3 Core, a Human Hetero-Amyloid Signaling Complex.
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人类异质淀粉样蛋白信号复合物坏死体 RIPK1-RIPK3 核心的结构

DOI:
10.1016/j.cell.2018.03.032
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发表时间:
2018-05-17
期刊:
影响因子:
64.5
通讯作者:
McDermott AE
McDermott AE
中科院分区:
生物学1区
文献类型:
--
作者:
Mompeán M;Li W;Li J;Laage S;Siemer AB;Bozkurt G;Wu H;McDermott AE

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RIPK1-RIPK3 坏死体是一种淀粉样蛋白信号复合物,可启动 TNF 诱导的坏死性凋亡,在人类免疫防御、癌症和神经退行性疾病中发挥作用。 RIPK1 和 RIPK3 通过其 RIP 同型相互作用基序与共有序列 IQIG (RIPK1) 和 VQVG (RIPK3) 关联。使用固态核磁共振,我们确定了 RIPK1-RIPK3 核心的高分辨率结构。 RIPK1和RIPK3交替堆叠(RIPK1、RIPK3、RIPK1、RIPK3等)形成异型β-折叠。两个这样的 β-折叠沿着紧凑的疏水界面结合在一起,该界面具有交替的 Ser(来自 RIPK1)和 Cys(来自 RIPK3)的不寻常阶梯。四残基 RIPK3 共有序列的晶体结构与 SSNMR 确定的结构一致。 RIPK1-RIPK3核心是异源淀粉样蛋白的第一个详细结构,为异源淀粉样蛋白形成的特异性相对于同源淀粉样蛋白提供了潜在的解释,并为理解信号转导机制提供了结构基础。简而言之:人类坏死性凋亡 RIPK1-RIPK3 复合物的固态 NMR 结构揭示了异源寡聚淀粉样蛋白信号复合物
The RIPK1-RIPK3 necrosome is an amyloid signaling complex that initiates TNF-induced necroptosis, serving in human immune defense, cancer and neurodegenerative diseases. RIPK1 and RIPK3 associate through their RIP homotypic interaction motifs with consensus sequences IQIG (RIPK1) and VQVG (RIPK3). Using solid-state nuclear magnetic resonance we determined the high-resolution structure of the RIPK1-RIPK3 core. RIPK1 and RIPK3 alternately stack (RIPK1, RIPK3, RIPK1, RIPK3, etc.) to form heterotypic β-sheets. Two such β-sheets bind together to along a compact hydrophobic interface featuring an unusual ladder of alternating Ser (from RIPK1) and Cys (from RIPK3). The crystal structure of a four-residue RIPK3 consensus sequence is consistent with the architecture determined by SSNMR. The RIPK1-RIPK3 core is the first detailed structure of a hetero-amyloid, and provides a potential explanation for the specificity of hetero- over homo-amyloid formation and a structural basis for understanding the mechanisms of signal transduction. In brief: Solid-state NMR structures of the human necroptosis RIPK1-RIPK3 complex reveal a hetero-oligomeric amyloid signaling complex
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