A new thiazolyl peptide, kocurin (1), was isolated from culture broths of a marine-derived Kocuria palustris. Its structural elucidation was accomplished using a combination of spectroscopic and chemical methods, including HRMS, extensive 1D and 2D NMR analysis, MS/MS fragmentation, and chemical degradation and Marfey’s analysis of the resulting amino acid residues. The structure herein reported corrects that previously assigned to PM181104 (3). Kocurin displayed activity against methicillin-resistant Staphylococcus aureus (MRSA), with MIC values in the submicromolar range.
从一种来源于海洋的 Kocuria palustris 的培养液中分离出了一种新的
噻唑肽 Kocurin (1)。利用光谱和
化学方法,包括 HRMS、广泛的一维和二维 NMR 分析、MS/MS 片段分析、
化学降解以及对所得
氨基酸残基的 Marfey 分析,完成了对其结构的阐明。本文报告的结构修正了之前分配给 PM181104 的结构 (3)。Kocurin 对耐
甲氧西林金黄色葡萄球菌(MRSA)具有活性,其 MIC 值在亚摩尔范围内。