Screening of small molecule interactor library by using in-cell NMR spectroscopy (SMILI-NMR).

Screening of small molecule interactor library by using in-cell NMR spectroscopy (SMILI-NMR).
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DOI:
10.1021/jm9000743
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发表时间:
2009-06-11
影响因子:
7.3
通讯作者:
Shekhtman A
Shekhtman A
中科院分区:
医学1区
文献类型:
--
作者:
Xie J;Thapa R;Reverdatto S;Burz DS;Shekhtman A

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我们开发了一种用于筛选小分子相互作用库(SMILI-NMR)的细胞内NMR测定,用于筛选能够破坏或增强生物分子复合物的两种或更多种组分之间的特异性相互作用的化合物。该方法依赖于一个明确的生物复合物的形成,并利用细胞内NMR光谱,以确定在原子尺度分辨率的相互作用中涉及的分子表面。由干扰复合物形成的小分子引起的相互作用表面的变化用作测定的读数。实验方案的细胞内性质确保小分子能够穿透细胞膜并特异性地接合靶分子。该方法的实用性通过筛选针对参与细胞周期停滞的FKBP-FRB蛋白复合物的小二肽文库来证明。通过SMILI-NMR鉴定的二肽在酵母中的功能测定中显示生物活性。
We developed an in-cell NMR assay for screening small molecule interactor libraries (SMILI-NMR) for compounds capable of disrupting or enhancing specific interactions between two or more components of a biomolecular complex. The method relies on the formation of a well-defined biocomplex and utilizes in-cell NMR spectroscopy to identify the molecular surfaces involved in the interaction at atomic scale resolution. Changes in the interaction surface caused by a small molecule interfering with complex formation are used as a read-out of the assay. The in-cell nature of the experimental protocol insures that the small molecule is capable of penetrating the cell membrane and specifically engaging the target molecule(s). Utility of the method was demonstrated by screening a small dipeptide library against the FKBP–FRB protein complex involved in cell cycle arrest. The dipeptide identified by SMILI-NMR showed biological activity in a functional assay in yeast.
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