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Ping L, Ruxian J, Mengping Z, Pei J, Zhuoya L, Guosheng L, Zhenyu W, Hailei W. Whole-cell biosynthesis of cytarabine by an unnecessary protein-reduced Escherichia coli that coexpresses purine and uracil phosphorylase. Biotechnol Bioeng 2022; 119:1768-1780. [PMID: 35383880 DOI: 10.1002/bit.28098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 03/18/2022] [Accepted: 03/25/2022] [Indexed: 11/10/2022]
Abstract
Currently, whole-cell catalysts face challenges due to the complexity of reaction systems, although they have a cost advantage over pure enzymes. In this work, cytarabine was synthesized by purified purine phosphorylase 1 (PNP1) and uracil phosphorylase (UP), and the conversion of cytarabine from adenine arabinoside reached 72.3±4.3%. However, the synthesis was unsuccessful by whole-cell catalysis due to interference from unnecessary proteins (UNPs) in cells. Thus, we carried out a large-scale gene editing involving 377 genes in the genome of Escherichia coli to reduce the negative effect of UNPs on substrate conversion and cytarabine production. Finally, the PNP1 and UP activities of the obtained mutant were increased significantly compared with the parental strain, and more importantly, the conversion rate of cytarabine by whole-cell catalysis reached 67.4±2.5%. The lack of 148 proteins and down-regulation of 783 proteins caused by gene editing were equivalent to partial purification of the enzymes within cells, and thus, we provided inspiration to solve the problem caused by UNP interference, which is ubiquitous in the field of whole-cell catalysis. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Li Ping
- Henan Engineering Laboratory for Bioconversion Technology of Functional Microbes,College of Life Science, Henan Normal University, Xinxiang, 453007, China
| | - Jing Ruxian
- Henan Engineering Laboratory for Bioconversion Technology of Functional Microbes,College of Life Science, Henan Normal University, Xinxiang, 453007, China
| | - Zhou Mengping
- Henan Engineering Laboratory for Bioconversion Technology of Functional Microbes,College of Life Science, Henan Normal University, Xinxiang, 453007, China
| | - Jia Pei
- Henan Engineering Laboratory for Bioconversion Technology of Functional Microbes,College of Life Science, Henan Normal University, Xinxiang, 453007, China
| | - Li Zhuoya
- Henan Engineering Laboratory for Bioconversion Technology of Functional Microbes,College of Life Science, Henan Normal University, Xinxiang, 453007, China
| | - Liu Guosheng
- Henan Engineering Laboratory for Bioconversion Technology of Functional Microbes,College of Life Science, Henan Normal University, Xinxiang, 453007, China
| | - Wang Zhenyu
- Henan Engineering Laboratory for Bioconversion Technology of Functional Microbes,College of Life Science, Henan Normal University, Xinxiang, 453007, China
| | - Wang Hailei
- Henan Engineering Laboratory for Bioconversion Technology of Functional Microbes,College of Life Science, Henan Normal University, Xinxiang, 453007, China.,Advanced Environmental Biotechnology Center, Nanyang Technological University, Singapore, 637141, Singapore
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Vanadate as a new substrate for nucleoside phosphorylases. J Biol Inorg Chem 2022; 27:221-227. [DOI: 10.1007/s00775-021-01923-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 12/15/2021] [Indexed: 10/19/2022]
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Mordkovich NN, Antipov AN, Okorokova NA, Safonova TN, Polyakov KM, Veiko VP. The Nature of Thermal Stability of Prokaryotic Nucleoside Phosphorylases. APPL BIOCHEM MICRO+ 2020. [DOI: 10.1134/s0003683820060125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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