Rational Design of Bacitracin A Derivatives by Incorporating Natural Product Derived Heterocycles
摘要:
Heterocycles display common structural motifs in nonribosomally produced peptides with an enormous impact on their bioactivity. In the case of the branched cyclic Bacitracin A, the thiazoline moiety is manufactured during NRPS peptide chain elongation. Here we describe a method to selectively alter the heterocyclic metal binding subunit of Bacitracin A by the synthesis of heterocyclic building blocks that were successfully coupled to the linear decapeptide and subsequently cyclized using the excised bacitracin PCP-TE bidomain. Utilization of this cyclase allowed the first generation of branched cyclic bacitracin derivatives containing thiazole and oxazoles. The generated bacitracin derivatives showed bactericidal activity, indicating the possibility of altering the biological important heterocyclic subunit and overcoming existing limitations for the application of bacitracin.
Synthetic Studies with Bacitracin A and Preparation of Analogues Containing Alternative Zinc Binding Groups
作者:Ned Buijs、Halana C. Vlaming、Matthijs J. van Haren、Nathaniel I. Martin
DOI:10.1002/cbic.202200547
日期:2022.12.16
An improved synthetic route is reported for the clinically used natural product antibiotic bacitracin A. This new route provides access to the bacitracin scaffold with confidence in the stereochemical purity of the product and enables studies involving structural variation of the bacitracin framework.
据报道,临床使用的天然产物抗生素杆菌肽 A 的合成路线得到了改进。这条新路线提供了获得杆菌肽支架的途径,并且对产品的立体化学纯度充满信心,并能够进行涉及杆菌肽框架结构变化的研究。