Analysis of<i>N</i>-amino-imidazolin-2-one peptide turn mimic 4-position substituent effects on conformation by X-ray crystallography
作者:Caroline Proulx、William D. Lubell
DOI:10.1002/bip.22327
日期:2014.1
turn conformation and the chi dihedral angle of the neighbouring C-terminal residue side-chain. The nature of the 4-position substituent caused substantial effects on the psi(i + 2) main chain and C-terminal Phe chi(1) side-chain dihedral angle values, giving a preference for beta- and gamma-turn conformers for the methyl- and benzyl-substituted imidazolin-2-ones, respectively. Conformational analysis
N-氨基-咪唑啉-2-酮是一种新型的转弯模拟物,可以在其上方便地添加不同氨基酸的侧链,已通过X射线晶体学进行了分析。检查了4和2的N-氨基-咪唑啉-2-甲基的4-甲基和4-苄基四肽模型2和3,研究了4位取代基对相邻构象和相邻C端残基侧基的二面角的影响。链。4位取代基的性质对psi(i + 2)主链和C端Phe chi(1)侧链二面角值产生了实质性影响,因此对于分别被甲基和苄基取代的咪唑啉-2-酮。固态构象分析为指导N-氨基-咪唑啉-2-酮在肽模拟中的应用提供了见识。