Elucidation of the Hsp90 C-terminal inhibitor binding site.

Elucidation of the Hsp90 C-terminal inhibitor binding site.
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DOI:
10.1021/cb200052x
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发表时间:
2011-08-19
影响因子:
4
通讯作者:
Blagg, Brian S. J.
Blagg, Brian S. J.
中科院分区:
生物学2区
文献类型:
--
作者:
Matts, Robert L.;Dixit, Anshuman;Peterson, Laura B.;Sun, Liang;Voruganti, Sudhakar;Kalyanaraman, Palgunan;Hartson, Steve D.;Verkhivker, Gennady M.;Blagg, Brian S. J.

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Hsp90伴侣机器是折叠、激活和/或稳定与恶性进展直接相关的50多种蛋白质所必需的。Hsp90在其N端和c端结构域均含有小分子结合位点,然而,关于c端结合位点的结构和生化数据有限。本研究利用LC-MS/MS技术,利用蛋白酶指纹图谱和光亲和标记技术,揭示了Hsp90 c端结构域的小分子结合位点。利用HtpG的SAXS开放结构建立hHsp90α的同源性模型,并将NB的生物活性构象对接到该模型中。本文给出了NB与Hsp90α结合的生物活性构象模型。
The Hsp90 chaperone machine is required for the folding, activation and/or stabilization of more than 50 proteins directly related to malignant progression. Hsp90 contains small molecule binding sites at both its N- and C-terminal domains, however, limited structural and biochemical data regarding the C-terminal binding site is available. In this report, the small molecule binding site in the Hsp90 C-terminal domain was revealed by protease fingerprinting and photoaffinity labeling utilizing LC-MS/MS. The identified site was characterized by generation of a homology model for hHsp90α using the SAXS open structure of HtpG and docking the bioactive conformation of NB into the generated model. The resulting model for the bioactive conformation of NB bound to Hsp90α is presented herein.
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