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Li Z, Chen B, Gu Y, Tan H, Zhang Z, Chang J. Enhanced endogenous amino acids and energy metabolism level for cAMP biosynthesis by Arthrobacter sp. CCTCC 2013431 with citrate as cosubstrate. Biotechnol Lett 2021; 43:1989-1999. [PMID: 34392452 DOI: 10.1007/s10529-021-03170-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 08/05/2021] [Indexed: 11/29/2022]
Abstract
OBJECTIVES In our previous study, citrate was used as auxiliary energy substance for improving cAMP fermentation performance, however, the regulation mechanism of citrate on improved cAMP contents was not clear. To elucidate the regulation mechanism, cAMP fermentations with/without citrate addition were conducted in a 7 L fermentor using Arthrobacter sp. CCTCC 2013431 and assays on key enzymes activities, energy metabolism level, amino acids contents and peroxidation level were performed. RESULTS With 3 g/L-broth sodium citrate added, cAMP concentration and conversion yield from glucose reached 4.34 g/L and 0.076 g/g which were improved by 30.7% and 29.8%, respectively, when compared with those of control. Citrate changed carbon flux distribution among different routes and more carbon flux was directed into pentose phosphate pathway beneficial to cAMP synthesis. Meanwhile, energy metabolism together with precursor amino acids levels were improved significantly owing to strengthened metabolic intensity of tricarboxylate cycle by exogenous citrate utilization which provided energy and substance basis for cAMP production. Moreover, higher glutamate synthesis and oxidative stress caused by citrate addition consumed excessive NADPH derived from pentose phosphate pathway by which feedback suppression for pentose phosphate pathway was relieved efficiently. CONCLUSION Citrate promoted cAMP fermentation production by Arthrobacter sp. CCTCC 2013431 due to enhanced precursor amino acids, energy metabolism level and relieved feedback suppression for pentose phosphate pathway.
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Affiliation(s)
- Zhigang Li
- Collaborative Innovation Center of Modern Biological Breeding of Henan Province, Xinxiang, 453003, China.,School of Life Science and Technology, Henan Institute of Science and Technology, 90 Hualan Road, Xinxiang, 453003, Henan Province, China
| | - Baofeng Chen
- School of Life Science and Technology, Henan Institute of Science and Technology, 90 Hualan Road, Xinxiang, 453003, Henan Province, China
| | - Yang Gu
- School of Life Science and Technology, Henan Institute of Science and Technology, 90 Hualan Road, Xinxiang, 453003, Henan Province, China
| | - Hai Tan
- School of Life Science and Technology, Henan Institute of Science and Technology, 90 Hualan Road, Xinxiang, 453003, Henan Province, China
| | - Zhonghua Zhang
- School of Life Science and Technology, Henan Institute of Science and Technology, 90 Hualan Road, Xinxiang, 453003, Henan Province, China
| | - Jingling Chang
- Collaborative Innovation Center of Modern Biological Breeding of Henan Province, Xinxiang, 453003, China. .,School of Life Science and Technology, Henan Institute of Science and Technology, 90 Hualan Road, Xinxiang, 453003, Henan Province, China.
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Ye S, Jeong D, Shon JC, Liu KH, Kim KH, Shin M, Kim SR. Deletion of PHO13 improves aerobic L-arabinose fermentation in engineered Saccharomyces cerevisiae. J Ind Microbiol Biotechnol 2019; 46:1725-1731. [PMID: 31501960 DOI: 10.1007/s10295-019-02233-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 08/31/2019] [Indexed: 10/26/2022]
Abstract
Pentose sugars are increasingly being used in industrial applications of Saccharomyces cerevisiae. Although L-arabinose is a highlighted pentose that has been identified as next-generation biomass, arabinose fermentation has not yet undergone extensive development for industrial utilization. In this study, we integrated a heterologous fungal arabinose pathway with a deletion of PHO13 phosphatase gene. PHO13 deletion increased arabinose consumption rate and specific ethanol productivity under aerobic conditions and consequently depleted sedoheptulose by activation of the TAL1 gene. Global metabolite profiling indicated upregulation of the pentose phosphate pathway and downstream effects such as trehalose accumulation and downregulation of the TCA cycle. Our results suggest that engineering of PHO13 has ample potential for arabinose conversion to ethanol as an industrial source for biofuels.
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Affiliation(s)
- Suji Ye
- School of Food Science and Biotechnology, Kyungpook National University, Daegu, Republic of Korea
| | - Deokyeol Jeong
- School of Food Science and Biotechnology, Kyungpook National University, Daegu, Republic of Korea
| | - Jong Cheol Shon
- Department of Environmental Toxicology Research Center, Korea Institute of Toxicology, Jinju, Republic of Korea.,College of Pharmacy and Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Kwang-Hyeon Liu
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Kyoung Heon Kim
- Department of Biotechnology, Graduate School, Korea University, Seoul, Republic of Korea
| | - Minhye Shin
- Department of Biotechnology, Graduate School, Korea University, Seoul, Republic of Korea.
| | - Soo Rin Kim
- School of Food Science and Biotechnology, Kyungpook National University, Daegu, Republic of Korea.
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Sun Y, Guo W, Wang F, Peng F, Yang Y, Dai X, Liu X, Bai Z. Transcriptome and Multivariable Data Analysis of Corynebacterium glutamicum under Different Dissolved Oxygen Conditions in Bioreactors. PLoS One 2016; 11:e0167156. [PMID: 27907077 PMCID: PMC5132257 DOI: 10.1371/journal.pone.0167156] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Accepted: 11/09/2016] [Indexed: 12/16/2022] Open
Abstract
Dissolved oxygen (DO) is an important factor in the fermentation process of Corynebacterium glutamicum, which is a widely used aerobic microbe in bio-industry. Herein, we described RNA-seq for C. glutamicum under different DO levels (50%, 30% and 0%) in 5 L bioreactors. Multivariate data analysis (MVDA) models were used to analyze the RNA-seq and metabolism data to investigate the global effect of DO on the transcriptional distinction of the substance and energy metabolism of C. glutamicum. The results showed that there were 39 and 236 differentially expressed genes (DEGs) under the 50% and 0% DO conditions, respectively, compared to the 30% DO condition. Key genes and pathways affected by DO were analyzed, and the result of the MVDA and RNA-seq revealed that different DO levels in the fermenter had large effects on the substance and energy metabolism and cellular redox balance of C. glutamicum. At low DO, the glycolysis pathway was up-regulated, and TCA was shunted by the up-regulation of the glyoxylate pathway and over-production of amino acids, including valine, cysteine and arginine. Due to the lack of electron-acceptor oxygen, 7 genes related to the electron transfer chain were changed, causing changes in the intracellular ATP content at 0% and 30% DO. The metabolic flux was changed to rebalance the cellular redox. This study applied deep sequencing to identify a wealth of genes and pathways that changed under different DO conditions and provided an overall comprehensive view of the metabolism of C. glutamicum. The results provide potential ways to improve the oxygen tolerance of C. glutamicum and to modify the metabolic flux for amino acid production and heterologous protein expression.
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Affiliation(s)
- Yang Sun
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, China
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Wenwen Guo
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, China
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Fen Wang
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, China
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Feng Peng
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, China
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Yankun Yang
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, China
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Xiaofeng Dai
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, China
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Xiuxia Liu
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, China
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Zhonghu Bai
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, China
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
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