Conformational perturbations induced by N-amination and N-hydroxylation of peptides
作者:Virginie Dupont、Alain Lecoq、Jean Paul Mangeot、Andre Aubry、Guy Boussard、Michel Marraud
DOI:10.1021/ja00073a002
日期:1993.10
Amination and hydroxylation of the amide nitrogen in a peptide chain have little influence on the local geometry, but both affect the hydrogen-bonding network, and therefore the conformational properties of the modified peptide. An experimental study in solution (IR spectroscopy and 1 H-NMR) and in the solid state (X-ray diffraction) has been carried out on the N-amino and N-hydroxy analogues of the
肽链中酰胺氮的胺化和羟基化对局部几何结构几乎没有影响,但都会影响氢键网络,从而影响修饰肽的构象特性。对两种 RCO-Pro-NHMe 和 RCO-的 N-氨基和 N-羟基类似物进行了溶液(IR 光谱和 1 H-NMR)和固态(X 射线衍射)实验研究。已知的 Pro-Gly-NHiPr 肽分别优先采用 γ-和 β-转角结构。N-氨基是一种弱质子供体,与肽链没有显着的相互作用。相反,N-羟基是强质子供体,与肽羰基密切接触