| 第一作者： | Yin, WC (Yin, Wencheng); Cao, YJ (Cao, Yujin); Jin, MM (Jin, Miaomiao); Xian, M (Xian, Mo); Liu, W (Liu, Wei); |
|---|---|
| 联系作者： | Yin, WC (Yin, Wencheng); Cao, YJ (Cao, Yujin); Jin, MM (Jin, Miaomiao); Xian, M (Xian, Mo); Liu, W (Liu, Wei); |
| 发表年度： | 2021 |
| 期： | 9 |
| 卷： | 10 |
| 页： | 2266-2275 |
| 摘要： | Xylose is the raw material for the synthesis of many important platform compounds. At present, xylose is commercially produced by chemical extraction. However, there are still some bottlenecks in the extraction of xylose, including complicated operation processes and the chemical substances introduced, leading to the high cost of xylose and of synthesizing the downstream compounds of xylose. The current market price of xylose is 8X that of glucose, so using low-cost glucose as the substrate to produce the downstream compounds of xylose can theoretically reduce the cost by 70%. Here, we designed a pathway for the biosynthesis of xylose from glucose in Escherichia coli. This biosynthetic pathway was achieved by overexpressing five genes, namely, zwf, pgl, gnd, ape, and xylA, while replacing the native xylulose kinase gene xylB with araL from B. subtilis, which displays phosphatase activity toward D-xylulose 5-phosphate. The yield of xylose was increased to 3.3 g/L by optimizing the metabolic pathway. Furthermore, xylitol was successfully synthesized by introducing the xyl1 gene, which suggested that the biosynthetic pathway of xylose from glucose is universally applicable for the synthesis of xylose downstream compounds. This is the first study to synthesize xylose and its downstream compounds by using glucose as a substrate, which not only reduces the cost of raw materials, but also alleviates carbon catabolite repression (CCR), providing a new idea for the synthesis of downstream compounds of xylose. |
| 刊物名称： | ACS SYNTHETIC BIOLOGY |
| 影响因子： | 5.571 |
| 全文链接： | https://pubs.acs.org/doi/10.1021/acssynbio.1c00184 |
