Electron spin labeled ice binding compounds used for carrying paramagnetic centers for dynamic nuclear polarization
申请人:The Trustees of California State University
公开号:US10562937B2
公开(公告)日:2020-02-18
Spin-labeled ice binding compounds (IBCs) including ice binding proteins (IBPs) or antifreeze proteins (AFPs) and their analogs may carry paramagnetic centers for dynamic nuclear polarization (DNP), for enhancing nuclear magnetic resonance (NMR) signal intensities. Use of spin-labeled IBCs to perform DNP exploits the IBCs' ability to homogeneously distribute the paramagnetic centers in frozen water solution at low temperature, leading to high DNP efficiency. Other advantages of using spin-labeled IBCs include cryo-protecting biological samples; cryo-preserving relative positions and orientations of the spin labeling groups; selecting positions and orientations of spin labeling groups with freedom and without technical barriers to making multiple spin labels in an IBC; and enabling use of a solvent that is primarily water for DNP at low temperatures in view of the potentially high water solubilities of spin-labeled IBCs.
自旋标记的冰结合化合物(IBCs),包括冰结合蛋白(IBPs)或抗冻蛋白(AFPs)及其类似物,可携带用于动态核极化(DNP)的顺磁性中心,以增强核磁共振(NMR)信号强度。使用自旋标记的 IBC 进行 DNP 可利用 IBC 在低温下将顺磁中心均匀分布在冷冻水溶液中的能力,从而提高 DNP 效率。使用自旋标记 IBC 的其他优势还包括:低温保护生物样本;低温保存自旋标记基团的相对位置和方向;自由选择自旋标记基团的位置和方向,并且在一个 IBC 中制作多个自旋标记没有技术障碍;鉴于自旋标记 IBC 可能具有很高的水溶性,因此可以在低温下使用以水为主的溶剂进行 DNP。