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Metabolomic change and pathway profiling reveal enhanced ansamitocin P-3 production in Actinosynnema pretiosum with low organic nitrogen availability in culture medium. Appl Microbiol Biotechnol 2020; 104:3555-3568. [PMID: 32114676 DOI: 10.1007/s00253-020-10463-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 12/07/2019] [Accepted: 02/12/2020] [Indexed: 10/24/2022]
Abstract
Ansamitocin P-3 (AP-3), a 19-membered polyketide macrocyclic lactam, has potent antitumor activity. Our previous study showed that a relatively low organic nitrogen concentration in culture medium could significantly improve AP-3 production of Actinosynnema pretiosum. In the present study, we aimed to reveal the possible reasons for this improvement through metabolomic and gene transcriptional analytical methods. At the same time, a metabolic pathway profile based on metabolome data and pathway correlation information was performed to obtain a systematic view of the metabolic network modulations of A. pretiosum. Orthogonal partial least squares discriminant analysis showed that nine and eleven key metabolites directly associated with AP-3 production at growth phase and ansamitocin production phase, respectively. In-depth pathway analysis results highlighted that low organic nitrogen availability had significant impacts on central carbon metabolism and amino acid metabolic pathways of A. pretiosum and these metabolic responses were found to be beneficial to precursor supply and ansamitocin biosynthesis. Furthermore, real-time PCR results showed that the transcription of genes involved in precursor and ansamitocin biosynthetic pathways were remarkably upregulated under low organic nitrogen condition thus directing increased carbon flux toward ansamitocin biosynthesis. More importantly, the metabolic pathway analysis demonstrated a competitive relationship between fatty acid and AP-3 biosynthesis could significantly affect the accumulation of AP-3. Our findings provided new knowledge on the organic nitrogen metabolism and ansamitocin biosynthetic precursor in A. pretiosum and identified several important rate-limiting steps involved in ansamitocin biosynthesis thus providing a theoretical basis of further improvement in AP-3 production.
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Li Z, Zhu D, Shen Y. Discovery of novel bioactive natural products driven by genome mining. Drug Discov Ther 2018; 12:318-328. [DOI: 10.5582/ddt.2018.01066] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Zhongyue Li
- Key Laboratory of Chemical Biology, School of Pharmaceutical Sciences, Shandong University
| | - Deyu Zhu
- School of Basic Medical Sciences, Shandong University
| | - Yuemao Shen
- Key Laboratory of Chemical Biology, School of Pharmaceutical Sciences, Shandong University
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Li J, Sun R, Ning X, Wang X, Wang Z. Genome-Scale Metabolic Model of Actinosynnema pretiosum ATCC 31280 and Its Application for Ansamitocin P-3 Production Improvement. Genes (Basel) 2018; 9:E364. [PMID: 30036981 PMCID: PMC6070911 DOI: 10.3390/genes9070364] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 07/06/2018] [Accepted: 07/09/2018] [Indexed: 01/12/2023] Open
Abstract
Actinosynnema pretiosum ATCC 31280 is the producer of antitumor agent ansamitocin P-3 (AP-3). Understanding of the AP-3 biosynthetic pathway and the whole metabolic network in A. pretiosum is important for the improvement of AP-3 titer. In this study, we reconstructed the first complete Genome-Scale Metabolic Model (GSMM) Aspm1282 for A. pretiosum ATCC 31280 based on the newly sequenced genome, with 87% reactions having definite functional annotation. The model has been validated by effectively predicting growth and the key genes for AP-3 biosynthesis. Then we built condition-specific models for an AP-3 high-yield mutant NXJ-24 by integrating Aspm1282 model with time-course transcriptome data. The changes of flux distribution reflect the metabolic shift from growth-related pathway to secondary metabolism pathway since the second day of cultivation. The AP-3 and methionine metabolisms were both enriched in active flux for the last two days, which uncovered the relationships among cell growth, activation of methionine metabolism, and the biosynthesis of AP-3. Furthermore, we identified four combinatorial gene modifications for overproducing AP-3 by in silico strain design, which improved the theoretical flux of AP-3 biosynthesis from 0.201 to 0.372 mmol/gDW/h. Upregulation of methionine metabolic pathway is a potential strategy to improve the production of AP-3.
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Affiliation(s)
- Jian Li
- Bio-X Institutes, Key laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200030, China.
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200040, China.
| | - Renliang Sun
- Bio-X Institutes, Key laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200030, China.
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200040, China.
| | - Xinjuan Ning
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200040, China.
- State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai 200040, China.
| | - Xinran Wang
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200040, China.
- State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai 200040, China.
| | - Zhuo Wang
- Bio-X Institutes, Key laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200030, China.
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200040, China.
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Du ZQ, Zhang Y, Qian ZG, Xiao H, Zhong JJ. Combination of traditional mutation and metabolic engineering to enhance ansamitocin P-3 production in Actinosynnema pretiosum. Biotechnol Bioeng 2017; 114:2794-2806. [DOI: 10.1002/bit.26396] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 07/26/2017] [Accepted: 08/02/2017] [Indexed: 12/31/2022]
Affiliation(s)
- Zhi-Qiang Du
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, and Laboratory of Molecular Biochemical Engineering and Advanced Fermentation Technology, Department of Bioengineering, School of Life Sciences and Biotechnology; Shanghai Jiao Tong University; Shanghai China
| | - Yuan Zhang
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, and Laboratory of Molecular Biochemical Engineering and Advanced Fermentation Technology, Department of Bioengineering, School of Life Sciences and Biotechnology; Shanghai Jiao Tong University; Shanghai China
| | - Zhi-Gang Qian
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, and Laboratory of Molecular Biochemical Engineering and Advanced Fermentation Technology, Department of Bioengineering, School of Life Sciences and Biotechnology; Shanghai Jiao Tong University; Shanghai China
| | - Han Xiao
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, and Laboratory of Molecular Biochemical Engineering and Advanced Fermentation Technology, Department of Bioengineering, School of Life Sciences and Biotechnology; Shanghai Jiao Tong University; Shanghai China
| | - Jian-Jiang Zhong
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, and Laboratory of Molecular Biochemical Engineering and Advanced Fermentation Technology, Department of Bioengineering, School of Life Sciences and Biotechnology; Shanghai Jiao Tong University; Shanghai China
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Proteomic studies on anti-tumor agent ansamitocin P-3 producer Actinosynnema pretiosum in response to ammonium and isobutanol. Bioprocess Biosyst Eng 2017; 40:1133-1139. [PMID: 28382459 DOI: 10.1007/s00449-017-1763-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Accepted: 03/29/2017] [Indexed: 10/19/2022]
Abstract
Our previous work showed that the biosynthesis of ansamitocin P-3 (AP-3), an anti-tumor agent, by Actinosynnema pretiosum was depressed by ammonium but enhanced by isobutanol in the medium. Here we show proteomics analyses on A. pretiosum in different fermentation conditions with and without ammonium or isobutanol using two-dimensional electrophoresis (2-DE), matrix-assisted laser desorption/ionization, and linear ion trap quadrupole mass spectrometry. Pairwise comparison of repetitive 2-DE maps was performed to find differentially expressed spots, and eight proteins were identified as functionally annotated ones. Among these proteins, D-3-phosphoglycerate dehydrogenase (PGDH) and glyceraldehyde 3-phosphate dehydrogenase showed statistically significant up-regulation in ammonium vs. basic or isobutanol medium, while fatty acid synthetase, histidine-tRNA ligase, transposase, molecular chaperone GroEL, SAM-dependent methyltransferase, and Crp/Fnr family transcriptional regulator were overexpressed in ammonium vs. basic medium. Based on the 2-DE data, exogenous L-serine which could inhibit the PGDH activity was added to the cultures with isobutanol, and a lower AP-3 production was confirmed under 2.5 mM serine addition (24 or 48 h).
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Tan GY, Liu T. Rational synthetic pathway refactoring of natural products biosynthesis in actinobacteria. Metab Eng 2017; 39:228-236. [DOI: 10.1016/j.ymben.2016.12.006] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 10/31/2016] [Accepted: 12/05/2016] [Indexed: 11/28/2022]
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Effects of modulation of pentose-phosphate pathway on biosynthesis of ansamitocins in Actinosynnema pretiosum. J Biotechnol 2016; 230:3-10. [DOI: 10.1016/j.jbiotec.2016.05.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 05/02/2016] [Accepted: 05/06/2016] [Indexed: 01/19/2023]
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Nasser EB, Samar SQ. Antimicrobial activity of Bacillus cereus: Isolation, identification and the effect of carbon and nitrogen source on its antagonistic activity. ACTA ACUST UNITED AC 2016. [DOI: 10.5897/jma2015.0340] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Constitutive overexpression of asm18 increases the production and diversity of maytansinoids in Actinosynnema pretiosum. Appl Microbiol Biotechnol 2015; 100:2641-9. [PMID: 26572523 DOI: 10.1007/s00253-015-7127-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 08/25/2015] [Accepted: 10/27/2015] [Indexed: 01/13/2023]
Abstract
Ansamitocins isolated from Actinosynnema pretiosum, potent antitumor compounds, belong to the family of maytansinoids, and the antibody-maytansinoid conjugates are currently under different phases of clinical trials. The clinical applications of ansamitocins have stimulated extensive studies to improve their production yields. In this study, we investigated the function of a pathway-specific S treptomyces antibiotic regulatory protein (SARP) family regulator, Asm18, and observed that ectopic overexpression of the asm18 gene increased the production of N-demethyl-4,5-desepoxy-maytansinol (2) to 50 mg/L in the HGF052 + pJTU824-asm18 strain, an increase by 4.7-fold compared to that of the control strain HGF052 + pJTU824. Real-time PCR analysis showed that the overexpression of the asm18 gene selectively increased the transcription levels of the genes involved in the biosynthesis of the starter unit (asm43), polyketide assembly (asmA), post-PKS modification (asm21), as well as the transcription levels of the regulatory gene (asm8), which is a specific LAL-type activator in ansamitocin biosynthesis. With the increase of fermentation titre, seven ansamitocin analogs (1-7) including three new ones (1, 5, and 6) and maytansinol (7) were isolated from the HGF052 + pJTU824-asm18 strain. Our results not only pave the way for further improving the production of ansamitocin analogs but also indicate that the post-PKS modifications of ansamitocin biosynthesis are flexible, which brings a potential of producing maytansinol, the most fascinating intermediate for the synthesis of antibody-maytansinoid conjugates, by optimizing the HGF052 and/or HGF052 + pJTU824-asm18 strains.
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Fan Y, Gao Y, Zhou J, Wei L, Chen J, Hua Q. Process optimization with alternative carbon sources and modulation of secondary metabolism for enhanced ansamitocin P-3 production in Actinosynnema pretiosum. J Biotechnol 2014; 192 Pt A:1-10. [DOI: 10.1016/j.jbiotec.2014.10.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Revised: 10/10/2014] [Accepted: 10/13/2014] [Indexed: 12/19/2022]
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Gao Y, Fan Y, Nambou K, Wei L, Liu Z, Imanaka T, Hua Q. Enhancement of ansamitocin P-3 production in Actinosynnema pretiosum by a synergistic effect of glycerol and glucose. ACTA ACUST UNITED AC 2014; 41:143-52. [DOI: 10.1007/s10295-013-1374-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2013] [Accepted: 10/21/2013] [Indexed: 11/28/2022]
Abstract
Abstract
Ansamitocin P-3 (AP-3), a secondary metabolite produced by Actinosynnema pretiosum, is well known for its extraordinary antitumor properties and is broadly utilized in clinical research. Through this work, we found, for the first time, that the combination of glucose and glycerol as a mixed carbon source is an appropriate approach for enhancing the production of AP-3 by A. pretiosum. The amount yielded was about threefold that obtained with glucose as the sole carbon source. In order to better understand the mechanisms that channel glycerol metabolism towards AP-3 production, the activities of some key enzymes such as glucose-6-phosphate dehydrogenase, glucose-6-phosphate isomerase, phosphoglucomutase (PGM), and fructose 1,6-bisphosphatase were assessed. The results showed that glycerol affects the production of AP-3 by increasing PGM activity. Furthermore, qRT-PCR analysis revealed that transcriptional levels of structural genes asm14 and asm24, and primary genes amir5189 and amir6327 were up-regulated in medium containing glycerol.
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Affiliation(s)
- Yang Gao
- grid.28056.39 0000000121634895 State Key Laboratory of Bioreactor Engineering East China University of Science and Technology 130 Meilong Road 200237 Shanghai People’s Republic of China
| | - Yuxiang Fan
- grid.28056.39 0000000121634895 State Key Laboratory of Bioreactor Engineering East China University of Science and Technology 130 Meilong Road 200237 Shanghai People’s Republic of China
| | - Komi Nambou
- grid.28056.39 0000000121634895 State Key Laboratory of Bioreactor Engineering East China University of Science and Technology 130 Meilong Road 200237 Shanghai People’s Republic of China
| | - Liujing Wei
- grid.28056.39 0000000121634895 State Key Laboratory of Bioreactor Engineering East China University of Science and Technology 130 Meilong Road 200237 Shanghai People’s Republic of China
| | - Zhijie Liu
- grid.28056.39 0000000121634895 State Key Laboratory of Bioreactor Engineering East China University of Science and Technology 130 Meilong Road 200237 Shanghai People’s Republic of China
| | - Tadayuki Imanaka
- grid.28056.39 0000000121634895 State Key Laboratory of Bioreactor Engineering East China University of Science and Technology 130 Meilong Road 200237 Shanghai People’s Republic of China
| | - Qiang Hua
- grid.28056.39 0000000121634895 State Key Laboratory of Bioreactor Engineering East China University of Science and Technology 130 Meilong Road 200237 Shanghai People’s Republic of China
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Lin J, Bai L, Deng Z, Zhong JJ. Enhanced production of ansamitocin P-3 by addition of isobutanol in fermentation of Actinosynnema pretiosum. BIORESOURCE TECHNOLOGY 2011; 102:1863-1868. [PMID: 20980145 DOI: 10.1016/j.biortech.2010.09.102] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2010] [Revised: 09/27/2010] [Accepted: 09/28/2010] [Indexed: 05/30/2023]
Abstract
Supply of isobutanol to enhance the production of anti-tumor agent ansamitocin P-3 (AP-3) in medium containing agro-industrial residues was investigated with analysis of gene transcription, enzyme activity, and intermediate accumulation. Under the optimal addition of isobutanol, about 4-fold improvement of AP-3 production was obtained, and the consumption of isobutanol and accumulation of isobutyrate, malonyl-CoA, and acetyl-CoA were observed. Compared to the control without isobutanol addition, activities of both isobutanol dehydrogenase and valine dehydrogenase were enhanced in isobutanol supplemented culture. Transcription level of genes in AP-3 biosynthetic and isobutyryl-CoA catabolic pathways responded to isobutanol addition in a similar way as AP-3 biosynthesis. It is concluded that isobutanol addition was an effective strategy for increasing AP-3 production via regulation of gene transcription and pools of precursors, and the information obtained might be helpful to the fermentation productivity improvement on large scale.
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Affiliation(s)
- Jinxia Lin
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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