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您的检索式：作者名="Tingyi Wen"
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| 1 | Metabolic engineering and flux analysis of Corynebacterium glutamicum for L-serine production显示文摘L-Serine plays a critical role as a building block for cell growth, and thus it is difficult to achieve the direct fermentation of L-serine from glucose. In this study, Corynebacterium glutamicum ATCC 13032 was engineered de novo by blocking and attenuating the conversion of L-serine to pyruvate and glycine, releasing the feedback inhibition by L-serine to 3-phosphoglycerate dehydrogenase (PGDH), in combination with the co-expression of 3-phosphoglycerate kinase (PGK) and feedback-resistant PGDH (PGDHr). The resulting strain, SER-8, exhibited a lower specific growth rate and significant differences in L-serine levels from Phase I to Phase V as determined for fed-batch fermentation. The intracellular L-serine pool reached (14.22±1.41) μmol gCDM 1, which was higher than glycine pool, contrary to fermentation with the wild-type strain. Furthermore, metabolic flux analysis demonstrated that the over-expression of PGK directed the flux of the pentose phosphate pathway (PPP) towards the glycolysis pathway (EMP), and the expression of PGDHr improved the L-serine biosynthesis pathway. In addition, the flux from L-serine to glycine dropped by 24%, indicating that the deletion of the activator GlyR resulted in down-regulation of serine hydroxymethyltransferase (SHMT) expression. Taken together, our findings imply that L-serine pool management is fundamental for sustaining the viability of C. glutamicum, and improvement of C1 units generation by introducing the glycine cleavage system (GCV) to degrade the excessive glycine is a promising target for L-serine production in C. glutamicum. | LAI ShuJuan ZHANG Yun LIU ShuWen LIANG Yong SHANG XiuLing CHAI Xin WEN TingYi | 2012 | Science China(Life Sciences)2012，55，4： | 15 |
| 2 | In vitro assembly of the bacterial actin protein MamK from 'Candidatus Magnetobacterium casensis' in the phylum Nitrospirae显示文摘 | Aihua Deng Wei Lin Nana Shi Jie Wu Zhaopeng Sun Qinyun Sun Hua Bai Yongxin Pan Tingyi Wen | 2016 | Protein & Cell2016，7，4： | 1 |
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