An Extended Planar C5 Conformation and a 310-Helical Structure of Peptide Foldamer Composed of Diverse -Ethylated ,-Disubstituted -Amino Acids
作者:Masakazu Tanaka、Shin Nishimura、Makoto Oba、Yosuke Demizu、Masaaki Kurihara、Hiroshi Suemune
DOI:10.1002/chem.200204476
日期:2003.7.7
active peptide foldamers Tfa-[(S)-(alphaEt)Leu]-[(S)-(alphaEt)Nva]-Deg-[(S)-(alphaEt)Nle]-OEt (10) and Tfa-[(S)-(alphaEt)Val]-[(S)-(alphaEt)Leu]-[(S)-(alphaEt)Nva]-Deg-[(S)-(alphaEt)Nl e]-OEt (11) composed of diverse alpha-ethylated alpha,alpha-disubstituted alpha-amino acids were synthesized. The dominant conformation of these peptides in solution was an unusual, fully extended planar conformation, and
光学活性肽折叠剂Tfa-[(S)-(alphaEt)Leu]-[(S-(alphaEt)Nva] -Deg-[(S)-(alphaEt)Nle] -OEt(10)和Tfa-[( S)-(alphaEt)Val]-[(S)-(alphaEt)Leu]-[(S)-(alphaEt)Nva] -Deg-[(S)-(alphaEt)Nle e] -OEt(11)组成合成了多种α-乙基化的α,α-二取代的α-氨基酸。这些肽在溶液中的主要构象是一个不寻常的,完全延伸的平面构象,并且在晶体状态下是右旋(P)和左旋(M)3(10)螺旋结构,其中10和P图11中的3(10)-螺旋结构。由手性α-乙基化的α,α-二取代的α-氨基酸制备的肽的优选平面C(5)构象与由手性α-甲基化的α,制备的肽的3(10)-螺旋结构完全不同,