Modeling the Preferred Shapes of Polyamine Transporter Ligands and Dihydromotuporamine-C Mimics: Shovel versus Hoe
作者:Breitbeil、Navneet Kaur、Jean-Guy Delcros、Bénédicte Martin、Khalil A. Abboud、Phanstiel
DOI:10.1021/jm050814w
日期:2006.4.1
4-triamine (7b), and 4a all preferred a hoe motif. This hoe shape was defined by the all-anti polyamine shaft extending above the relatively flat, appended ring system. The hoe geometry was also inferred by the (1)H NMR spectrum of the free amine of 7a (CDCl(3)), which showed a strong shielding effect of the anthracene ring on the chemical shifts associated with the appended polyamine chain. This shielding
由motuporamine和蒽-多胺衍生物生成的优选构象异构体提供了与多胺转运蛋白(PAT)识别和潜在的二氢motuporamine C(4a)生物活性相关的形状的洞察力。分子建模显示N(1)-(蒽-9-甲基)-3,3-三胺(6a),N(1)-(蒽-9-甲基)-4,4-三胺(6b),N( 1)-(蒽-9-甲基)-N(1)-乙基-3,3-三胺(7a),N(1)-(蒽-9-甲基)-N(1)-乙基-4,4 -三胺(7b)和4a均优选a图案。这种头的形状是由在整个相对平坦的附加环系统上方延伸的全抗多胺杆所确定的。by的几何形状还可以通过7a游离胺(CDCl(3))的(1)H NMR光谱推断得出,该光谱显示出蒽环对与连接的多胺链相关的化学位移具有较强的屏蔽作用。发现该屏蔽作用在7a的宽浓度范围内是独立的,这也支持了分子内现象。在N(1)-位的取代程度似乎是蒽基甲基-多胺共轭物的分子形状偏好和生物学活性的重要决定因素。