作者:Takahito Ishikawa、Tomoyuki Morita、Shunsaku Kimura
DOI:10.1246/bcsj.80.1483
日期:2007.8.15
Novel helix-peptide wheels, in which three helices were connected by using a template, were prepared, and the dipole–dipole interactions among the helices were studied in relation to the formation of a planar triangle structure containing three helices. The helical segments had a 310-helix structure. 13C spin-lattice relaxation time (T1) measurements showed that the helical segments had restricted mobility. Deuterium exchange rates of amide protons were accelerated in the helix-peptide wheels compared to the respective linear helix peptides, suggesting that there is torsion on the cylindrical shape. Therefore, the predominant structure of the helix-peptide wheels is a planar triangle in solution. Further, the triangle structure was successfully transferred onto a gold substrate.
制备了新型螺旋肽轮,其中三个螺旋通过模板连接,并研究了螺旋之间的偶极-偶极相互作用与包含三个螺旋的平面三角形结构形成的关系。螺旋段具有310螺旋结构。13C自旋-晶格弛豫时间(T1)测量表明,螺旋段的移动性受到限制。与相应的线性螺旋肽相比,螺旋肽轮中酰胺原子的氘交换速率加快,表明圆柱形上有扭转。因此,螺旋肽轮的主要结构是溶液中的平面三角形。此外,三角形结构成功转移到金基底上。