NMR conformational analysis of biosynthetic precursor-type lipid A: monomolecular state and supramolecular assembly
作者:Masato Oikawa、Tetsuya Shintaku、Naohiro Fukuda、Harald Sekljic、Yoshiyuki Fukase、Hiroaki Yoshizaki、Koichi Fukase、Shoichi Kusumoto
DOI:10.1039/b410544c
日期:——
The detailed conformational analysis of a single molecule of the tetraacyl biosynthetic precursor-type lipid A and its characteristic supramolecular assembly in aqueous SDS-micelles are described. Regular molecular arrangements were observed by detailed analysis of the NMR spectra of synthetically pure specimens, including regiospecifically 13C-labeled ones. NMR analysis of a biologically inactive precursor-type analogue with four shorter acyl chains demonstrated its conformational flexibility, indicating the importance of hydrophobic interactions for maintaining the conformation of such molecules.
描述了四酰基生物合成前体型脂质 A 的单分子的详细构象分析及其在水性 SDS 胶束中的特征性超分子组装。通过对合成纯样品(包括区域特异性 13C 标记样品)的 NMR 光谱进行详细分析,观察到规则的分子排列。对具有四个较短酰基链的生物无活性前体类型类似物的 NMR 分析证明了其构象灵活性,表明疏水相互作用对于维持此类分子构象的重要性。