incorporation into oligopeptides as the N‐terminal residue. The resultant oxo peptides were extensively studied using X‐ray crystallography to understand the interactions offered by the oxo group in peptide crystals. We find that the oxo groups are capable of providing additional hydrogen bonding opportunities to the peptides, resulting in increased intermolecular interactions in crystals. The study thus
天然
氨基酸中不存在分离的不带电荷的氢键受体,例如醛或酮基的羰基官能团。虽然谷
氨酰胺和天冬酰胺是已知的,通过在其侧链酰胺羰基氢键,它们还具有酰胺 NH 2基团,其可以充当氢键供体。这使得对含氧代残基,侧链具有分离的羰基的肽的结构研究变得有趣。在这里,我们报道了δ-和ε-氧代
氨基酸的合成及其作为N端残基掺入寡肽的过程。使用X射线晶体学对生成的oxo肽进行了广泛的研究,以了解肽晶体中oxo基提供的相互作用。我们发现,氧代基团能够为肽提供额外的氢键结合机会,从而导致晶体间的分子间相互作用增加。因此,该研究为利用羰基残基在合成肽中引入分子间相互作用提供了途径。