The Nonribosomal Peptide Synthetase Enzyme DdaD Tethers <i>N</i><sub>β</sub>-Fumaramoyl-<scp>l</scp>-2,3-diaminopropionate for Fe(II)/α-Ketoglutarate-Dependent Epoxidation by DdaC during Dapdiamide Antibiotic Biosynthesis
作者:Marie A. Hollenhorst、Stefanie B. Bumpus、Megan L. Matthews、J. Martin Bollinger、Neil L. Kelleher、Christopher T. Walsh
DOI:10.1021/ja1072367
日期:2010.11.10
The gene cluster from Pantoea agglomerans responsible for biosynthesis of the dapdiamide antibiotics encodes an adenylation-thiolation didomain protein, DdaD, and an Fe(II)/α-ketoglutarate-dependent dioxygenase homologue, DdaC. Here we show that DdaD, a nonribosomal peptide synthetase module, activates and sequesters N(β)-fumaramoyl-l-2,3-diaminopropionate as a covalently tethered thioester for subsequent
来自成团泛菌的基因簇负责 dapdiamide 抗生素的生物合成,编码腺苷酸化-硫醇化双结构域蛋白 DdaD 和 Fe(II)/α-酮戊二酸依赖性双加氧酶同源物 DdaC。在这里,我们展示了 DdaD,一种非核糖体肽合成酶模块,激活和隔离 N(β)-延胡索酰基-1-2,3-二氨基丙酸酯作为共价连接的硫酯,用于随后对延胡索酰基进行氧化修饰。DdaC 催化共价结合的 N(β)-富马甲酰基-1-2,3-二氨基丙酰基-S-DdaD 物质的 Fe(II)-和 α-酮戊二酸依赖性环氧化,生成 N(β)-环氧琥珀酰胺-DAP (DAP = 2,3-二氨基丙酸酯)与 DdaD 的硫酯连接。水解释放后,