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Paramagnetic DOSY: An Accurate Tool for the Analysis of the Supramolecular Interactions between Lanthanide Complexes and Proteins

机译:顺磁性DOSY:分析镧系元素配合物和蛋白质之间的超分子相互作用的准确工具

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摘要

Diffusion ordered NMR is implemented to determine accurately the mobility of paramagnetic tris-dipicolinate lanthanide complexes that are versatile probes of protein structure. It is shown that diffusion coefficient ratios can be measured with an accuracy of 1% using a standard BPPLED pulse sequence, which allows for observing significant, though weak, variations when different species are interacting with the paramagnetic compound. We demonstrate that this approach is complementary to classical chemical shift titration experiments, and that it can be applied successfully to probe the supramolecular dynamic interactions between lanthanide complexes and small molecules on the one hand, or to determine rapidly their affinity for a targeted protein.
机译:实施扩散有序NMR可以准确确定顺磁性的tris-dipicolinate镧系元素复合物(其是蛋白质结构的多用途探针)的迁移率。结果表明,使用标准的BPPLED脉冲序列可以以1%的精度测量扩散系数比率,当不同的物种与顺磁性化合物相互作用时,可以观察到显着的(尽管很小)变化。我们证明这种方法是经典化学位移滴定实验的补充,并且可以成功地用于一方面探测镧系元素配合物与小分子之间的超分子动力学相互作用,或快速确定其对靶蛋白的亲和力。

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