Growth phase-dependent changes in the expression of global regulatory genes and associated metabolic pathways in Escherichia coli

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• 作者：Mahbuba Rahman ; Mohammad Rubayet Hasan and Kazuyuki Shimizu
• 关键词：Batch fermentation ; Escherichia coli ; Global regulators ; Metabolic pathways ; rpoS
• 刊名：Biotechnology Letters
• 出版年：2008
• 出版时间：May, 2008
• 年：2008
• 卷：30
• 期：5
• 页码：853-860
• 全文大小：384.7 KB

文摘

Metabolic regulation in Escherichia coli was studied in terms of the changes in the expression of the global regulatory genes rpoD, rpoS, soxRS, cra, fadR, iclR and arcA at three different growth phases, in batch culture. The expression of rpoS and several rpoS-dependent metabolic pathway genes, such as tktB, talA, fumC, acnA, sucA, acs and sodC, were increased (∼1.5 to 2-fold) as the cells entered the late phase of growth. The changes in the expression of other global regulators and their effects on different metabolic pathway genes were less significant, as compared to rpoS, during the later phases of growth.