化工学报 ›› 2008, Vol. 59 ›› Issue (9): 2295-2301.

• 生物化学工程与技术 • 上一篇    下一篇

不同供氧水平对L-精氨酸分批发酵过程的影响

许虹,窦文芳,许泓瑜,张晓梅,饶志明,许正宏   

  1. 江南大学医药学院制药工程实验室; 江南大学工业生物技术教育部重点实验室
  • 出版日期:2008-09-05 发布日期:2008-09-05

Effect of different oxygen supply levels on L-arginine batch fermentation process

XU Hong, DOU Wenfang, XU Hongyu, ZHANG Xiaomei, RAO Zhiming, XU Zhenghong   

  • Online:2008-09-05 Published:2008-09-05

摘要: 以钝齿棒杆菌Corynebacterium crenatum SYPA5-5为研究菌株,通过不同摇瓶装液量试验,考察发酵过程中供氧对L-精氨酸合成的影响。作者分别采用发酵动力学模型和代谢流量分析对实验结果进行分析后发现:在发酵前期,高供氧使HMP途径更加活跃,生成大量NADPH促进菌体生长;高供氧控制同样利于L-精氨酸的合成,一方面是由于菌体的高葡萄糖摄入量,另一方面是由于有更多的流量从α-KG流向Arg的前体物质Glu。

关键词:

L-精氨酸, 钝齿棒杆菌, 发酵, 供氧

Abstract:

The effect of different oxygen supply levels by controlling flask capacity on the performance of producing L-arginine using Corynebacterium crenatum SYPA5-5 was investigated in the batch fermentation process.The analysis of fermentation kinetic models and metabolic flux indicated that the hexose monophosphate (HMP) pathway was much more active to produce nicotinamide adenine dinucleotide phosphate (NADPH) for bacterial growth at a high oxygen supply level.L-arginine production was also enhanced at a high oxygen supply level because of high glucose consumption.On the other hand, there was more metabolic flux from α-KG to Glu, the precursor of Arg.

Key words:

L-精氨酸, 钝齿棒杆菌, 发酵, 供氧