Effective strategy to assign ¹H- ¹⁵N heteronuclear correlation NMR signals from lysine side-chain NH3₃⁺ groups of proteins at low temperature.

Effective strategy to assign ¹H- ¹⁵N heteronuclear correlation NMR signals from lysine side-chain NH3₃⁺ groups of proteins at low temperature.
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DOI:
10.1007/s10858-014-9854-y
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发表时间:
2014-09
影响因子:
2.7
通讯作者:
Iwahara J
Iwahara J
中科院分区:
生物学3区
文献类型:
--
作者:
Esadze A;Zandarashvili L;Iwahara J

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最近的研究表明,赖氨酸侧链NH 3+基团是NMR研究涉及氢键和与蛋白质功能相关的离子对的动力学的极好探针。然而,由于快速的氢交换,从赖氨酸NH3+基团观察1H-15 N NMR交叉峰通常需要使用相对低的温度,这使得共振归属困难。在这里,我们提出了一个有效的策略,分配1H和15 N共振的NH3+基团在低温下。该策略涉及两个新的赖氨酸侧链的1H/13 C/15 N三重共振实验。应用到蛋白质-DNA复合物的证明。
Recent studies have shown that lysine side-chain NH3+ groups are excellent probes for NMR investigations of dynamics involving hydrogen bonds and ion pairs relevant to protein function. However, due to rapid hydrogen exchange, observation of 1H-15N NMR cross peaks from lysine NH3+ groups often requires use of a relatively low temperature, which renders difficulty in resonance assignment. Here we present an effective strategy to assign 1H and 15N resonances of NH3+ groups at low temperatures. This strategy involves two new 1H/13C/15N triple-resonance experiments for lysine side chains. Application to a protein-DNA complex is demonstrated.
DOI: 10.1021/ja312314b
发表时间: 2013-03-06
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