1
|
Zhao X, Hussain MH, Mohsin A, Liu Z, Xu Z, Li Z, Guo W, Guo M. Mechanistic insight for improving butenyl-spinosyn production through combined ARTP/UV mutagenesis and ribosome engineering in Saccharopolyspora pogona. Front Bioeng Biotechnol 2024; 11:1329859. [PMID: 38292303 PMCID: PMC10825966 DOI: 10.3389/fbioe.2023.1329859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 12/22/2023] [Indexed: 02/01/2024] Open
Abstract
Butenyl-spinosyn is a highly effective, wide-spectrum and environmentally-friendly biological insecticide produced by Saccharopolyspora pogona. However, its scale-up is impeded due to its lower titer in wild-type strains. In this work, ARTP/UV mutagenesis and ribosome engineering were employed to enhance the butenyl-spinosyn production, and a stable mutant Saccharopolyspora pogona aG6 with high butenyl-spinosyn yield was successfully obtained. For the first time, the fermentation results in the 5 L bioreactor demonstrated that the butenyl-spinosyn produced by mutant Saccharopolyspora pogona aG6 reached the maximum value of 130 mg/L, almost 4-fold increase over the wild-type strain WT. Furthermore, comparative genomic, transcriptome and target metabolomic analysis revealed that the accumulation of butenyl-spinosyn was promoted by alterations in ribosomal proteins, branched-chain amino acid degradation and oxidative phosphorylation. Conclusively, the proposed model of ribosome engineering combined with ARTP/UV showed the improved biosynthesis regulation of butenyl-spinosyn in S. pogona.
Collapse
Affiliation(s)
- Xueli Zhao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Muhammad Hammad Hussain
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Ali Mohsin
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Zebo Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Zhixian Xu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Zhanxia Li
- Department of Respiratory Medicine, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Weiqun Guo
- Academy of National Food and Strategic Reserves Administration, Beijing, China
| | - Meijin Guo
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| |
Collapse
|
2
|
Wang P, Yin Y, Wang X, Wen J. Enhanced ascomycin production in Streptomyces hygroscopicus var. ascomyceticus by employing polyhydroxybutyrate as an intracellular carbon reservoir and optimizing carbon addition. Microb Cell Fact 2021; 20:70. [PMID: 33731113 PMCID: PMC7968196 DOI: 10.1186/s12934-021-01561-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Accepted: 03/08/2021] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Ascomycin is a multifunctional antibiotic produced by Streptomyces hygroscopicus var. ascomyceticus. As a secondary metabolite, the production of ascomycin is often limited by the shortage of precursors during the late fermentation phase. Polyhydroxybutyrate is an intracellular polymer accumulated by prokaryotic microorganisms. Developing polyhydroxybutyrate as an intracellular carbon reservoir for precursor synthesis is of great significance to improve the yield of ascomycin. RESULTS The fermentation characteristics of the parent strain S. hygroscopicus var. ascomyceticus FS35 showed that the accumulation and decomposition of polyhydroxybutyrate was respectively correlated with cell growth and ascomycin production. The co-overexpression of the exogenous polyhydroxybutyrate synthesis gene phaC and native polyhydroxybutyrate decomposition gene fkbU increased both the biomass and ascomycin yield. Comparative transcriptional analysis showed that the storage of polyhydroxybutyrate during the exponential phase accelerated biosynthesis processes by stimulating the utilization of carbon sources, while the decomposition of polyhydroxybutyrate during the stationary phase increased the biosynthesis of ascomycin precursors by enhancing the metabolic flux through primary pathways. The comparative analysis of cofactor concentrations confirmed that the biosynthesis of polyhydroxybutyrate depended on the supply of NADH. At low sugar concentrations found in the late exponential phase, the optimization of carbon source addition further strengthened the polyhydroxybutyrate metabolism by increasing the total concentration of cofactors. Finally, in the fermentation medium with 22 g/L starch and 52 g/L dextrin, the ascomycin yield of the co-overexpression strain was increased to 626.30 mg/L, which was 2.11-fold higher than that of the parent strain in the initial medium (296.29 mg/L). CONCLUSIONS Here we report for the first time that polyhydroxybutyrate metabolism is beneficial for cell growth and ascomycin production by acting as an intracellular carbon reservoir, stored as polymers when carbon sources are abundant and depolymerized into monomers for the biosynthesis of precursors when carbon sources are insufficient. The successful application of polyhydroxybutyrate in increasing the output of ascomycin provides a new strategy for improving the yields of other secondary metabolites.
Collapse
Affiliation(s)
- Pan Wang
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, China.,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
| | - Ying Yin
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, China.,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
| | - Xin Wang
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, China.,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
| | - Jianping Wen
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, China. .,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, China.
| |
Collapse
|
3
|
Sambyal K, Singh RV. Bioprocess and genetic engineering aspects of ascomycin production: a review. J Genet Eng Biotechnol 2020; 18:73. [PMID: 33215240 PMCID: PMC7677420 DOI: 10.1186/s43141-020-00092-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 11/09/2020] [Indexed: 11/10/2022]
Abstract
BACKGROUND Ascomycin is a highly valuable multifunctional drug which exhibits numerous biological properties. Being an immunosuppressant, it is known to prevent graft rejection in humans and has potential to treat varying skin ailments. Its derivatives represent a novel class of anti-inflammatory macrolactams. But the biosynthetic machinery of ascomycin is still unclear. Due to the structural complexity, there occurs difficulty in its chemical synthesis; therefore, microbial production has been preferred by using Streptomyces hygroscopicus subsp. ascomyceticus. Through several genetic manipulation and mutagenesis techniques, the yield can be increased by several folds without any difficulties. Genetic engineering has played a significant role in understanding the biosynthetic pathway of ascomycin. SHORT CONCLUSION Recently, many efforts have been made to utilize the therapeutic effects of ascomycin and its derivatives. This article covers concepts related to the production kinetics of ascomycin including an update of the ongoing yield improvement techniques as well as screening method of novel strains for ascomycin production.
Collapse
Affiliation(s)
- Krishika Sambyal
- University Institute of Biotechnology, Chandigarh University, Gharuan, Punjab India
| | - Rahul Vikram Singh
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002 India
| |
Collapse
|
4
|
Yu Z, Lv H, Wu Y, Wei T, Yang S, Ju D, Chen S. Enhancement of FK520 production in Streptomyces hygroscopicus by combining traditional mutagenesis with metabolic engineering. Appl Microbiol Biotechnol 2019; 103:9593-9606. [PMID: 31713669 DOI: 10.1007/s00253-019-10192-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 09/26/2019] [Accepted: 10/03/2019] [Indexed: 11/26/2022]
Abstract
FK520 (ascomycin), a 23-membered macrolide with immunosuppressive activity, is produced by Streptomyces hygroscopicus. The problem of low yield and high impurities (mainly FK523) limits the industrialized production of FK520. In this study, the FK520 yield was significantly improved by strain mutagenesis and genetic engineering. First, a FK520 high-producing strain SFK-6-33 (2432.2 mg/L) was obtained from SFK-36 (1588.4 mg/L) through ultraviolet radiation mutation coupled with streptomycin resistance screening. The endogenous crotonyl-CoA carboxylase/reductase (FkbS) was found to play an important role in FK520 biosynthesis, identified with CRISPR/dCas9 inhibition system. FkbS was overexpressed in SFK-6-33 to obtain the engineered strain SFK-OfkbS, which produced 2817.0 mg/L of FK520 resulting from an increase in intracellular ethylmalonyl-CoA levels. In addition, the FK520 levels could be further increased with supplementation of crotonic acid in SFK-OfkbS. Overexpression of acetyl-CoA carboxylase (ACCase), used for the synthesis of malonyl-CoA, was also investigated in SFK-6-33, which improved the FK520 yield to 3320.1 mg/L but showed no significant inhibition in FK523 production. To further enhance FK520 production, FkbS and ACCase combinatorial overexpression strain SFK-OASN was constructed; the FK520 production increased by 44.4% to 3511.4 mg/L, and the FK523/FK520 ratio was reduced from 9.6 to 5.6% compared with that in SFK-6-33. Finally, a fed-batch culture was carried out in a 5-L fermenter, and the FK520 yield reached 3913.9 mg/L at 168 h by feeding glycerol, representing the highest FK520 yield reported thus far. These results demonstrated that traditional mutagenesis combined with metabolic engineering was an effective strategy to improve FK520 production.
Collapse
Affiliation(s)
- Zhituo Yu
- Department of Biological Medicines, Fudan University School of Pharmacy, Shanghai, 201203, China
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, Shanghai, 201203, China
| | - Huihui Lv
- Department of Biological Medicines, Fudan University School of Pharmacy, Shanghai, 201203, China
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, Shanghai, 201203, China
| | - Yuanjie Wu
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, Shanghai, 201203, China
| | - Tengyun Wei
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, Shanghai, 201203, China
| | - Songbai Yang
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, Shanghai, 201203, China
| | - Dianwen Ju
- Department of Biological Medicines, Fudan University School of Pharmacy, Shanghai, 201203, China.
| | - Shaoxin Chen
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, Shanghai, 201203, China.
| |
Collapse
|
5
|
Zhang Y, Chen H, Wang P, Wen J. Identification of the regulon FkbN for ascomycin biosynthesis and its interspecies conservation analysis as LAL family regulator. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2019.107349] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
6
|
Wang C, Wang J, Yuan J, Jiang L, Jiang X, Yang B, Zhao G, Liu B, Huang D. Generation of
Streptomyces hygroscopicus
cell factories with enhanced ascomycin production by combined elicitation and pathway‐engineering strategies. Biotechnol Bioeng 2019; 116:3382-3395. [DOI: 10.1002/bit.27158] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 08/26/2019] [Accepted: 08/28/2019] [Indexed: 01/09/2023]
Affiliation(s)
- Cheng Wang
- Department of Forestry Engineering, College of ForestryNorthwest A&F UniversityYangling Shaanxi China
| | - Junhua Wang
- Tianjin Institute of Industrial BiotechnologyChinese Academy of SciencesTianjin China
| | - Jian Yuan
- Key Laboratory of Molecular Microbiology and TechnologyMinistry of EducationTianjin China
- TEDA Institute of Biological Sciences and BiotechnologyNankai UniversityTianjin China
| | - Lingyan Jiang
- Key Laboratory of Molecular Microbiology and TechnologyMinistry of EducationTianjin China
- TEDA Institute of Biological Sciences and BiotechnologyNankai UniversityTianjin China
| | - Xiaolong Jiang
- Key Laboratory of Molecular Microbiology and TechnologyMinistry of EducationTianjin China
- TEDA Institute of Biological Sciences and BiotechnologyNankai UniversityTianjin China
| | - Bin Yang
- Key Laboratory of Molecular Microbiology and TechnologyMinistry of EducationTianjin China
- TEDA Institute of Biological Sciences and BiotechnologyNankai UniversityTianjin China
| | - Guang Zhao
- Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao Shandong China
| | - Bin Liu
- Key Laboratory of Molecular Microbiology and TechnologyMinistry of EducationTianjin China
- TEDA Institute of Biological Sciences and BiotechnologyNankai UniversityTianjin China
- Tianjin Key Laboratory of Microbial Functional GenomicsNankai UniversityTianjin China
| | - Di Huang
- Key Laboratory of Molecular Microbiology and TechnologyMinistry of EducationTianjin China
- TEDA Institute of Biological Sciences and BiotechnologyNankai UniversityTianjin China
- SynBio Research Platform, Collaborative Innovation Center of Chemical Science and EngineeringNankai UniversityTianjin China
| |
Collapse
|
7
|
Study on growth and ascomycin production by Streptomyces hygroscopicus subsp. Ascomyceticus. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2019.101159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
8
|
Yu Z, Shen X, Wu Y, Yang S, Ju D, Chen S. Enhancement of ascomycin production via a combination of atmospheric and room temperature plasma mutagenesis in Streptomyces hygroscopicus and medium optimization. AMB Express 2019; 9:25. [PMID: 30778695 PMCID: PMC6379505 DOI: 10.1186/s13568-019-0749-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Accepted: 02/07/2019] [Indexed: 12/16/2022] Open
Abstract
Ascomycin, a key intermediate for chemical synthesis of immunosuppressive drug pimecrolimus, is produced by Streptomyces hygroscopicus var. ascomyceticus. In order to improve the strain production, the original S. hygroscopicus ATCC 14891 strain was treated here with atmospheric and room temperature plasma to obtain a stable high-producing S. hygroscopicus SFK-36 strain which produced 495.3 mg/L ascomycin, a 32.5% increase in ascomycin compared to the ATCC 14891. Then, fermentation medium was optimized using response surface methodology to further enhance ascomycin production. In the optimized medium containing 81.0 g/L soluble starch, 57.4 g/L peanut meal, and 15.8 g/L soybean oil, the ascomycin yield reached 1466.3 mg/L in flask culture. Furthermore, the fermentation process was carried out in a 5 L fermenter, and the ascomycin yield reached 1476.9 mg/L, which is the highest ascomycin yield reported so far. Therefore, traditional mutagenesis breeding combined with medium optimization is an effective approach for the enhancement of ascomycin production.
Collapse
|
9
|
Ashfield-Crook NR, Woodward Z, Soust M, Kurtböke Dİ. Assessment of the Detrimental Impact of Polyvalent Streptophages Intended to be Used as Biological Control Agents on Beneficial Soil Streptoflora. Curr Microbiol 2018; 75:1589-1601. [PMID: 30242439 DOI: 10.1007/s00284-018-1565-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 09/05/2018] [Indexed: 11/26/2022]
Abstract
Streptophages are currently being investigated to control potato common scab, however, since a majority of streptophages are reported to be polyvalent, their potential to infect beneficial soil streptomycetes during the application process may have unintended consequences. To test this hypothesis, two phytopathogenic fungi, namely Fusarium solani and Rhizoctonia solani, were tested for their detrimental effect on the test crop wheat (Triticum aestivum cv. Gutha). F. solani caused a significant root weight reduction (34%) in the wheat plant and therefore was tested further in the pot trials with actinomycetes present. Sixty-seven streptomycete isolates from a Tasmanian potato farm were screened for their antifungal abilities against the two phytopathogenic fungi. Four actinomycetes found to be strongly antifungal were then tested for their disease-protective abilities against F. solani in pot trials again using wheat. Addition of the streptomycetes into the container media protected the plants against F. solani, indicating that streptomycetes have a disease-suppressive effect. A further pot trial was conducted to evaluate whether these beneficial streptomycete species would be affected by streptophage treatment and subsequently result in an increased risk of fungal infections. When streptophages were added to the pots, the shoot and root growth of wheat declined by 23.6% and 8.0%, respectively, in the pots with the pathogenic fungus compared to the control pots. These differences might suggest that removal of antifungal streptomycetes by polyvalent phages from plant rhizosphere when biocontrol of plant pathogenic streptomycetes (e.g. Streptomyces scabiei) is targeted might encourage secondary fungal infections in the farm environment. The presented data provide preliminary evidence that streptophage treatment of pathogenic streptomycetes may lead to an aggravated disease risk by soil-borne fungal pathogens when naturally present antagonists are removed. As a result, extensive farm site trials are required to determine the long-term detrimental impact of polyvalent streptophage treatments on beneficial soil streptoflora.
Collapse
Affiliation(s)
- Nina R Ashfield-Crook
- GeneCology Research Centre and the Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD, 4558, Australia
| | - Zachary Woodward
- Terragen Biotech Pty. Ltd., Level 5, 171 Collins Street, PO Box 24082, Melbourne, VIC, 3001, Australia
| | - Martin Soust
- Terragen Biotech Pty. Ltd., Level 5, 171 Collins Street, PO Box 24082, Melbourne, VIC, 3001, Australia
| | - D İpek Kurtböke
- GeneCology Research Centre and the Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD, 4558, Australia.
| |
Collapse
|
10
|
Robertsen HL, Weber T, Kim HU, Lee SY. Toward Systems Metabolic Engineering of Streptomycetes for Secondary Metabolites Production. Biotechnol J 2017; 13. [DOI: 10.1002/biot.201700465] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 10/20/2017] [Indexed: 12/20/2022]
Affiliation(s)
- Helene Lunde Robertsen
- The Novo Nordisk Foundation Center for Biosustainability; Technical University of Denmark; 2800 Kongens Lyngby Denmark
| | - Tilmann Weber
- The Novo Nordisk Foundation Center for Biosustainability; Technical University of Denmark; 2800 Kongens Lyngby Denmark
| | - Hyun Uk Kim
- Department of Chemical and Biomolecular Engineering (BK21 Plus Program); Korea Advanced Institute of Science and Technology (KAIST); Yuseong-gu Daejeon 306-701 Republic of Korea
| | - Sang Yup Lee
- The Novo Nordisk Foundation Center for Biosustainability; Technical University of Denmark; 2800 Kongens Lyngby Denmark
- Department of Chemical and Biomolecular Engineering (BK21 Plus Program); Korea Advanced Institute of Science and Technology (KAIST); Yuseong-gu Daejeon 306-701 Republic of Korea
| |
Collapse
|
11
|
Wang J, Wang C, Song K, Wen J. Metabolic network model guided engineering ethylmalonyl-CoA pathway to improve ascomycin production in Streptomyces hygroscopicus var. ascomyceticus. Microb Cell Fact 2017; 16:169. [PMID: 28974216 PMCID: PMC5627430 DOI: 10.1186/s12934-017-0787-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 09/26/2017] [Indexed: 12/22/2022] Open
Abstract
Background Ascomycin is a 23-membered polyketide macrolide with high immunosuppressant and antifungal activity. As the lower production in bio-fermentation, global metabolic analysis is required to further explore its biosynthetic network and determine the key limiting steps for rationally engineering. To achieve this goal, an engineering approach guided by a metabolic network model was implemented to better understand ascomycin biosynthesis and improve its production. Results The metabolic conservation of Streptomyces species was first investigated by comparing the metabolic enzymes of Streptomyces coelicolor A3(2) with those of 31 Streptomyces strains, the results showed that more than 72% of the examined proteins had high sequence similarity with counterparts in every surveyed strain. And it was found that metabolic reactions are more highly conserved than the enzymes themselves because of its lower diversity of metabolic functions than that of genes. The main source of the observed metabolic differences was from the diversity of secondary metabolism. According to the high conservation of primary metabolic reactions in Streptomyces species, the metabolic network model of Streptomyces hygroscopicus var. ascomyceticus was constructed based on the latest reported metabolic model of S. coelicolor A3(2) and validated experimentally. By coupling with flux balance analysis and using minimization of metabolic adjustment algorithm, potential targets for ascomycin overproduction were predicted. Since several of the preferred targets were highly associated with ethylmalonyl-CoA biosynthesis, two target genes hcd (encoding 3-hydroxybutyryl-CoA dehydrogenase) and ccr (encoding crotonyl-CoA carboxylase/reductase) were selected for overexpression in S. hygroscopicus var. ascomyceticus FS35. Both the mutants HA-Hcd and HA-Ccr showed higher ascomycin titer, which was consistent with the model predictions. Furthermore, the combined effects of the two genes were evaluated and the strain HA-Hcd-Ccr with hcd and ccr overexpression exhibited the highest ascomycin production (up to 438.95 mg/L), 1.43-folds improvement than that of the parent strain FS35 (305.56 mg/L). Conclusions The successful constructing and experimental validation of the metabolic model of S. hygroscopicus var. ascomyceticus showed that the general metabolic network model of Streptomyces species could be used to analyze the intracellular metabolism and predict the potential key limiting steps for target metabolites overproduction. The corresponding overexpression strains of the two identified genes (hcd and ccr) using the constructed model all displayed higher ascomycin titer. The strategy for yield improvement developed here could also be extended to the improvement of other secondary metabolites in Streptomyces species. Electronic supplementary material The online version of this article (doi:10.1186/s12934-017-0787-5) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Junhua Wang
- Key Laboratory of System Bioengineering (Tianjin University), Ministry of Education, Tianjin, 300072, People's Republic of China.,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Cheng Wang
- Key Laboratory of System Bioengineering (Tianjin University), Ministry of Education, Tianjin, 300072, People's Republic of China.,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Kejing Song
- Key Laboratory of System Bioengineering (Tianjin University), Ministry of Education, Tianjin, 300072, People's Republic of China.,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Jianping Wen
- Key Laboratory of System Bioengineering (Tianjin University), Ministry of Education, Tianjin, 300072, People's Republic of China. .,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China.
| |
Collapse
|
12
|
Engineering of the LysR family transcriptional regulator FkbR1 and its target gene to improve ascomycin production. Appl Microbiol Biotechnol 2017; 101:4581-4592. [DOI: 10.1007/s00253-017-8242-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 03/01/2017] [Accepted: 03/10/2017] [Indexed: 01/07/2023]
|
13
|
Qi H, Lv M, Song K, Wen J. Integration of parallel13C-labeling experiments and in silico pathway analysis for enhanced production of ascomycin. Biotechnol Bioeng 2016; 114:1036-1044. [DOI: 10.1002/bit.26223] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 11/06/2016] [Accepted: 11/16/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Haishan Qi
- Key Laboratory of Systems Bioengineering (Ministry of Education); Tianjin University; Tianjin 300072 People's Republic of China
- SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); School of Chemical Engineering and Technology, Tianjin University; Tianjin People's Republic of China
| | - Mengmeng Lv
- Key Laboratory of Systems Bioengineering (Ministry of Education); Tianjin University; Tianjin 300072 People's Republic of China
- SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); School of Chemical Engineering and Technology, Tianjin University; Tianjin People's Republic of China
| | - Kejing Song
- Key Laboratory of Systems Bioengineering (Ministry of Education); Tianjin University; Tianjin 300072 People's Republic of China
- SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); School of Chemical Engineering and Technology, Tianjin University; Tianjin People's Republic of China
| | - Jianping Wen
- Key Laboratory of Systems Bioengineering (Ministry of Education); Tianjin University; Tianjin 300072 People's Republic of China
- SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); School of Chemical Engineering and Technology, Tianjin University; Tianjin People's Republic of China
| |
Collapse
|
14
|
Reduction of foaming and enhancement of ascomycin production in rational Streptomyces hygroscopicus fermentation. Chin J Chem Eng 2015. [DOI: 10.1016/j.cjche.2014.04.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
15
|
Enhancement of ascomycin production in Streptomyces hygroscopicus var. ascomyceticus by combining resin HP20 addition and metabolic profiling analysis. ACTA ACUST UNITED AC 2014; 41:1365-74. [DOI: 10.1007/s10295-014-1473-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Accepted: 06/09/2014] [Indexed: 10/25/2022]
Abstract
Abstract
Combinatorial approach of adsorbent resin HP20 addition and metabolic profiling analysis were carried out to enhance ascomycin production. Under the optimal condition of 5 % m/v HP20 added at 24 h, ascomycin production was increased to 380 from 300 mg/L. To further rationally guide the improvement of ascomycin production, metabolic profiling analysis was employed to investigate the intracellular metabolite changes of Streptomyces hygroscopicus var. ascomyceticus FS35 in response to HP20 addition. A correlation between the metabolic profiles and ascomycin accumulation was revealed by partial least-squares to latent structures discriminant analysis, and 11 key metabolites that most contributed to metabolism differences and ascomycin biosynthesis were identified. Based on the analysis of metabolite changes together with their pathways, the potential key factors associated with ascomycin overproduction were determined. Finally, rationally designed fermentation strategies based on HP20 addition were performed as follows: 2 % v/v n-hexadecane was added at 24 h; 1.0 g/L valine was supplemented at 48 h; 1.0 g/L lysine was added at 72 h. The ascomycin production was ultimately improved to 460 mg/L, a 53.3 % enhancement compared with that obtained in initial condition. These results demonstrated that the combination of HP20 addition and metabolic profiling analysis could be successfully applied to the rational guidance of production improvement of ascomycin, as well as other clinically important compounds.
Collapse
|
16
|
Qi H, Zhao S, Wen J, Chen Y, Jia X. Analysis of ascomycin production enhanced by shikimic acid resistance and addition in Streptomyces hygroscopicus var. ascomyceticus. Biochem Eng J 2014. [DOI: 10.1016/j.bej.2013.11.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|