An improved solid-phase methodology for the synthesis of putative hexa- and heptapeptide intermediates in vancomycin biosynthesis
作者:Dong Bo Li、John A. Robinson
DOI:10.1039/b418908f
日期:——
The biosynthesis of the vancomycin aglycone involves three oxidative phenol coupling reactions, each catalyzed by a discrete cytochrome P450-like enzyme. Studies on the mechanism and specificity of the enzyme (called OxyB) catalyzing the first coupling, require access to suitable linear peptide precursors, each conjugated as a thioester to a peptide carrier domain of the vancomycin non-ribosomal peptide
万古霉素糖苷配基的生物合成涉及三个氧化苯酚偶联反应,每个反应均由离散的细胞色素P450样酶催化。关于催化第一偶联的酶(称为OxyB)的机理和特异性的研究,需要获得合适的线性肽前体,每种前体均作为硫酯与万古霉素非核糖体肽合成酶的肽载体结构域结合。在此描述了代表性的游离线性肽的有效途径。该方法在肽骨架的固相组装过程中利用了Alloc化学,但是重要的是,与早期的努力相反,该方法很大程度上避免了使用氨基酸侧链保护基。这样,目标线性肽可以在非常温和的条件下直接从固相支持物中释放。