Structural Characterizations of Transient and Heterogeneous Protein Complexes

瞬时和异质性蛋白质相互作用在催化和调节蛋白质相互作用中起着重要作用。 蛋白质复合物和多模块机械的功能。然而，所涉及的技术挑战 这种系统的结构特征对理解其内在的关键障碍 行为维生素B12依赖性甲硫氨酸合酶和Ia类核糖核苷酸还原酶是两种 这些酶是这些系统的缩影，在这些系统中，对它们的多种构象的结构洞察力将得到提高。 我们对他们生理和医学相关行为的理解。为了应对技术挑战， 通过研究这些系统，我将利用可以通过小规模和 广角X射线散射，并采用数学方法去卷积的混合物成可量化的 个别国家。这项工作将得到结晶学、光谱学和分析方法的补充。 超离心

Transient and heterogeneous protein interactions play important roles both in the catalytic and regulatory functions of protein complexes and multi-modular machinery. However, the technical challenges involved in structural characterizations of such systems have placed critical barriers against understanding their intrinsic behavior. The vitamin B12-dependent methionine synthase and class Ia ribonucleotide reductases are two enzymes that epitomize such systems where structural insight into their multiple conformations will advance our understanding of their physiological and medically relevant behavior. To meet the technical challenge of investigating these systems, I will exploit the ensemble structural information that can be gained by small- and wide-angle X-ray scattering and employ mathematical methods to deconvolute the mixtures into quantifiable individual states. This work will be complemented by crystallography, spectroscopy, and analytical ultracentrifugation.