Glucuronyl C4 dehydrogenation by the radical SAM enzyme BlsE involved in blasticidin S biosynthesis
作者:He Li、Junfeng Zhao、Wei Ding、Qi Zhang
DOI:10.1039/d1cc07132g
日期:——
Here we report functional investigation of the radical S-adenosylmethionine enzyme BlsE by using cytosylglucuronamide (CGM), which is the amide analog of cytosylglucuronic acid (CGA), an intermediate involved in blasticidin S biosynthesis. We showed that, instead of decarboxylation of CGA reported previously, BlsE catalyzes C4′-dehydrogenation of CGM, and the resulting ketone is acted on by an aminotransferase
在这里,我们报告了自由基 S-腺苷甲硫氨酸酶 BlsE 的功能研究,通过使用胞嘧啶葡萄糖醛酸 (CGM),它是胞嘧啶葡萄糖醛酸 (CGA) 的酰胺类似物,一种参与杀稻瘟素 S 生物合成的中间体。我们发现,与之前报道的 CGA 脱羧不同,BlsE 催化 CGM 的 C4'-脱氢,并且生成的酮由转氨酶 BlsH 作用以安装 C4'-氨基,其使用L- Asp 作为氨基供体.