Pathway Optimization and Uridine 5'-Triphosphate Regeneration for Enhancing Lacto-N-Tetraose Biosynthesis in Engineered Escherichia coli.
Pathway Optimization and Uridine 5'-Triphosphate Regeneration for Enhancing Lacto-N-Tetraose Biosynthesis in Engineered Escherichia coli.
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用于增强工程大肠杆菌中乳-N-四糖生物合成的途径优化和尿苷 5-三磷酸再生。
DOI:
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发表时间:
2022
影响因子:
6.1
通讯作者:
W. Mu
中科院分区:
文献类型:
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作者:
Zeyu Li;Yingying Zhu;Pan Zhang;Wenli Zhang;W. Mu
Recently, human milk oligosaccharides (HMOs) have attracted increasing attention and display great commercial importance, especially for the infant formula industry. Lacto-N-tetraose (LNT) is an important neutral HMO commercially added in infant formula and a core structure for synthesizing complex HMOs. Previously, a novel LNT-generating β-1,3-galactosyltransferase from Pseudogulbenkiania ferrooxidans was identified and used for construction of an LNT-producing engineered Escherichia coli. In this work, LNT biosynthesis was further enhanced by pathway optimization and uridine 5'-triphosphate (UTP) regeneration. The main strategies included genomic integration of UDP-glucose 4-epimerase-encoding gene, fine-tuning of the LNT pathway-related genes, blocking of competitive pathways related to UDP-galactose, and overexpression of UTP supply related genes. The maximal LNT titer reached 6.16 and 57.5 g/L by shake-flask and fed-batch fermentation, respectively.
影响因子:
5.3
作者:
Moore RE;Xu LL;Townsend SD
通讯作者:
Townsend SD
影响因子:
3.1
作者:
Wenlong Yao;Jun Yan;Xi Chen;Fengshan Wang;Hongzhi Cao
通讯作者:
Wenlong Yao;Jun Yan;Xi Chen;Fengshan Wang;Hongzhi Cao
影响因子:
12.9
作者:
McArthur JB;Yu H;Chen X
通讯作者:
Chen X