Structure, supramolecular organization and phase behavior of N-acyl-β-alanines: Structural homologues of mammalian brain constituents N-acylglycine and N-acyl-GABA
作者:D. Sivaramakrishna、Musti J. Swamy
DOI:10.1016/j.chemphyslip.2016.10.002
日期:2016.12
Strong hydrogen bonding interactions between COOH groups of the molecules from opposite leaflets as well as NH⋯O hydrogen bonds between the amide groups from adjacent molecules in the same leaflet as well as dispersion interactions between the acyl chains stabilize the bilayer structure. The d-spacings calculated from powder X-ray diffraction studies showed odd-even alteration with odd-chain length compounds
Ñ酰基-β-丙氨酸(一个Nabas)是结构同源物Ñ -acylglycines(唠叨)和Ñ酰基-γ氨基酸(NAGABAs),和非手性异构体Ñ -acylalanines,这些都是存在于哺乳动物的脑和其他组织和调节具有各种功能的生物受体的活性。在本研究中,我们合成并表征了一系列带有饱和酰基链的NABA(n = 8-20),并研究了它们的超分子组织和热致相行为。在差示扫描量热(DSC)研究中,大多数NABA在干态主链熔融相变之前以及与水水合时都会发生一两个次要的过渡,但在与缓冲液水合时仅会发生一个过渡( pH 7.6)。从DSC研究获得的跃迁焓(ΔH t)和熵(ΔS t)显示出在干燥状态和缓冲液水合时对链长的线性依赖性,而在用水水合时观察到奇偶变化。N-月桂酰-β-丙氨酸(NLBA)和N的晶体结构在P21 / c空间群的单斜系统中解决了-肉豆蔻酰基-β-丙氨酸(NMBA)问题。NLBA和NMB