Sparse labeling of proteins: structural characterization from long range constraints.

Sparse labeling of proteins: structural characterization from long range constraints.
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DOI:
10.1016/j.jmr.2013.12.012
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发表时间:
2014-04
影响因子:
2.2
通讯作者:
Pederson, Kari
Pederson, Kari
中科院分区:
化学3区
文献类型:
--
作者:
Prestegard, James H.;Agard, David A.;Moremen, Kelley W.;Lavery, Laura A.;Morris, Laura C.;Pederson, Kari

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生物学上重要的蛋白质的结构表征面临着许多挑战,随着分子大小的增加和分辨率的降低,当必须使用非细菌宿主进行表达时,分辨率的降低会改进诸如渗透等工具。在这些情况下,稀疏同位素标记(单个或小子集的氨基酸)结合远程顺磁约束和改进的计算建模提供了一种替代方案。这个观点提供了该方法的简要概述和两个潜在应用的讨论;一种涉及一个非常大的系统(Hsp90同源物),其中渗透是可能的,甲基- trosy序列可以潜在地用于提高分辨率,另一种涉及配体放置在糖基化蛋白中,通过单氨基酸标记(唾液基转移酶,ST6Gal1)来实现分辨率。这不是一个全面的审查,但作为未来前景的讨论,承诺对结构生物学领域的重要问题的影响。
Structural characterization of biologically important proteins faces many challenges associated with degradation of resolution as molecular size increases and loss of resolution improving tools such as perdeuteration when non-bacterial hosts must be used for expression. In these cases, sparse isotopic labeling (single or small subsets of amino acids) combined with long range paramagnetic constraints and improved computational modeling offer an alternative. This perspective provides a brief overview of this approach and two discussions of potential applications; one involving a very large system (an Hsp90 homolog) in which perdeuteration is possible and methyl-TROSY sequences can potentially be used to improve resolution, and one involving ligand placement in a glycosylated protein where resolution is achieved by single amino acid labeling (the sialyltransferase, ST6Gal1). This is not intended as a comprehensive review, but as a discussion of future prospects that promise impact on important questions in the structural biology area.
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