Synthesis of a Microcystis aeruginosa predicted metabolite with antimalarial activity
摘要:
The synthesis of a Microcystis aeruginosa predicted metabolite analog of aerucyclamide B was performed. This hexacyclopeptide was obtained from three heterocyclic building blocks by a convergent macrocycle-assembly methodology. The compound exhibited good in vitro antiplasmodial activity (IC50: 0.18 mu M, K1, cholorquine resistant strain). (c) 2012 Elsevier Ltd. All rights reserved.
Synthesis of a Microcystis aeruginosa predicted metabolite with antimalarial activity
摘要:
The synthesis of a Microcystis aeruginosa predicted metabolite analog of aerucyclamide B was performed. This hexacyclopeptide was obtained from three heterocyclic building blocks by a convergent macrocycle-assembly methodology. The compound exhibited good in vitro antiplasmodial activity (IC50: 0.18 mu M, K1, cholorquine resistant strain). (c) 2012 Elsevier Ltd. All rights reserved.
Rational Design of Bacitracin A Derivatives by Incorporating Natural Product Derived Heterocycles
作者:Björn Wagner、Dirk Schumann、Uwe Linne、Ulrich Koert、Mohamed A. Marahiel
DOI:10.1021/ja062906w
日期:2006.8.1
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.