Bapineuzumab captures the N-terminus of the Alzheimer's disease amyloid-beta peptide in a helical conformation.

Bapineuzumab captures the N-terminus of the Alzheimer's disease amyloid-beta peptide in a helical conformation.
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DOI:
10.1038/srep01302
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Parker, Michael W.
Parker, Michael W.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Miles, Luke A.;Crespi, Gabriela A. N.;Doughty, Larissa;Parker, Michael W.

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Bapineuzumab是辉瑞和约翰逊&约翰逊开发的一种人源化抗体,靶向阿尔茨海默病神经病理学基础的淀粉样蛋白(Aβ)斑块。在这里,我们报告了Fab-Aβ肽复合物的晶体结构,揭示了Bapineuzumab令人惊讶地在N-末端以单体螺旋构象捕获Aβ。微量热泳表明Fab以89(±9)nM的KD结合可溶性Aβ(1-40)。该结构解释了抗体对特定Aβ种类的精确选择性,以及为什么它不能识别N端修饰或截短的Aβ肽。
Bapineuzumab is a humanized antibody developed by Pfizer and Johnson & Johnson targeting the amyloid (Aβ) plaques that underlie Alzheimer's disease neuropathology. Here we report the crystal structure of a Fab-Aβ peptide complex that reveals Bapineuzumab surprisingly captures Aβ in a monomeric helical conformation at the N-terminus. Microscale thermophoresis suggests that the Fab binds soluble Aβ(1–40) with a KD of 89 (±9) nM. The structure explains the antibody's exquisite selectivity for particular Aβ species and why it cannot recognize N-terminally modified or truncated Aβ peptides.
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