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Bo L, Kang X, Chen Z, Zhao Y, Wu S, Li J, Bao S. Isolation and identification of high-yielding alkaline phosphatase strain: a novel mutagenesis technique and optimization of fermentation conditions. Prep Biochem Biotechnol 2023; 53:1276-1287. [PMID: 36939156 DOI: 10.1080/10826068.2023.2188412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
Abstract
Isolating and screening enzyme-producing strains from microorganisms and the commercial production of ALPs from microorganisms are of increasing interest. In this work, isolation and identification of high-yielding alkaline phosphatase strain were carried out using atmospheric and room temperature plasma mutagenesis (ARTP) for optimization of fermentation conditions. A strain of alkaline phosphatase-producing bacteria was screened from soil and identified by 16S rRNA gene sequencing as Bacillus amyloliquefaciens and named S-1. This strain had an alkaline phosphatase activity of 2594.73 U/L. Later, mutagenesis breeding of the alkaline phosphatase-producing S-1 strain was conducted using (ARTP), from which a higher alkaline phosphatase-producing positive mutant strain S-52 was screened. A central combination of five factors, including corn starch, yeast extract, metal ions, fermentation temperature and inoculum ratio, was then used to influence the activity of alkaline phosphatase. Results from the response surface methodology showed that the maximum enzyme activity of alkaline phosphatase was 12,110.6 U/L at corn starch, yeast extract and magnesium ions concentrations of 17.48 g/L, 18.052 g/L and 0.744 g/L, respectively; fermentation temperature of 37.192 °C; and inoculation ratio of 5.59%. This study is important for further exploring ARTP mutagenesis in B. amyloliquefaciens and the commercialization of ALPs.
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Affiliation(s)
- Le Bo
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - Xin Kang
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - Zuohui Chen
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - Yue Zhao
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - Si Wu
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - Jie Li
- College of Life Science, Northeast Agricultural University, Harbin, China
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Peng ZQ, Li C, Lin Y, Wu SS, Gan LH, Liu J, Yang SL, Zeng XH, Lin L. Cellulase production and efficient saccharification of biomass by a new mutant Trichoderma afroharzianum MEA-12. BIOTECHNOLOGY FOR BIOFUELS 2021; 14:219. [PMID: 34809676 PMCID: PMC8607671 DOI: 10.1186/s13068-021-02072-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 11/10/2021] [Indexed: 06/01/2023]
Abstract
BACKGROUND Cellulase plays a key role in converting cellulosic biomass into fermentable sugar to produce chemicals and fuels, which is generally produced by filamentous fungi. However, most of the filamentous fungi obtained by natural breeding have low secretory capacity in cellulase production, which are far from meeting the requirements of industrial production. Random mutagenesis combined with adaptive laboratory evolution (ALE) strategy is an effective method to increase the production of fungal enzymes. RESULTS This study obtained a mutant of Trichoderma afroharzianum by exposures to N-methyl-N'-nitro-N-nitrosoguanidine (MNNG), Ethyl Methanesulfonate (EMS), Atmospheric and Room Temperature Plasma (ARTP) and ALE with high sugar stress. The T. afroharzianum mutant MEA-12 produced 0.60, 5.47, 0.31 and 2.17 IU/mL FPase, CMCase, pNPCase and pNPGase, respectively. These levels were 4.33, 6.37, 4.92 and 4.15 times higher than those of the parental strain, respectively. Also, it was found that T. afroharzianum had the same carbon catabolite repression (CCR) effect as other Trichoderma in liquid submerged fermentation. In contrast, the mutant MEA-12 can tolerate the inhibition of glucose (up to 20 mM) without affecting enzyme production under inducing conditions. Interestingly, crude enzyme from MEA-12 showed high enzymatic hydrolysis efficiency against three different biomasses (cornstalk, bamboo and reed), when combined with cellulase from T. reesei Rut-C30. In addition, the factors that improved cellulase production by MEA-12 were clarified. CONCLUSIONS Overall, compound mutagenesis combined with ALE effectively increased the production of fungal cellulase. A super-producing mutant MEA-12 was obtained, and its cellulase could hydrolyze common biomasses efficiently, in combination with enzymes derived from model strain T. reesei, which provides a new choice for processing of bioresources in the future.
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Affiliation(s)
- Zhi-Qing Peng
- College of Energy, Xiamen University, Xiamen, 361102, China
| | - Chuang Li
- College of Energy, Xiamen University, Xiamen, 361102, China
| | - Yi Lin
- College of Energy, Xiamen University, Xiamen, 361102, China
| | - Sheng-Shan Wu
- College of Energy, Xiamen University, Xiamen, 361102, China
- Fujian Engineering and Research Centre of Clean and High-Valued Technologies for Biomass, Xiamen, 361102, China
- Xiamen Key Laboratory of Clean and High-Valued Utilization for Biomass, Xiamen, 361102, China
| | - Li-Hui Gan
- College of Energy, Xiamen University, Xiamen, 361102, China
- Fujian Engineering and Research Centre of Clean and High-Valued Technologies for Biomass, Xiamen, 361102, China
- Xiamen Key Laboratory of Clean and High-Valued Utilization for Biomass, Xiamen, 361102, China
| | - Jian Liu
- College of Energy, Xiamen University, Xiamen, 361102, China
- Fujian Engineering and Research Centre of Clean and High-Valued Technologies for Biomass, Xiamen, 361102, China
- Xiamen Key Laboratory of Clean and High-Valued Utilization for Biomass, Xiamen, 361102, China
| | - Shu-Liang Yang
- College of Energy, Xiamen University, Xiamen, 361102, China
- Fujian Engineering and Research Centre of Clean and High-Valued Technologies for Biomass, Xiamen, 361102, China
- Xiamen Key Laboratory of Clean and High-Valued Utilization for Biomass, Xiamen, 361102, China
| | - Xian-Hai Zeng
- College of Energy, Xiamen University, Xiamen, 361102, China.
- Fujian Engineering and Research Centre of Clean and High-Valued Technologies for Biomass, Xiamen, 361102, China.
- Xiamen Key Laboratory of Clean and High-Valued Utilization for Biomass, Xiamen, 361102, China.
| | - Lu Lin
- College of Energy, Xiamen University, Xiamen, 361102, China
- Fujian Engineering and Research Centre of Clean and High-Valued Technologies for Biomass, Xiamen, 361102, China
- Xiamen Key Laboratory of Clean and High-Valued Utilization for Biomass, Xiamen, 361102, China
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Recent Advances in Lactic Acid Production by Lactic Acid Bacteria. Appl Biochem Biotechnol 2021; 193:4151-4171. [PMID: 34519919 DOI: 10.1007/s12010-021-03672-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 09/03/2021] [Indexed: 02/07/2023]
Abstract
Lactic acid can synthesize high value-added chemicals such as poly lactic acid. In order to further minimize the cost of lactic acid production, some effective strategies (e.g., effective mutagenesis and metabolic engineering) have been applied to increase productive capacity of lactic acid bacteria. In addition, low-cost cheap raw materials (e.g., cheap carbon source and cheap nitrogen source) are also used to reduce the cost of lactic acid production. In this review, we summarized the recent developments in lactic acid production, including efficient strain modification technology (high-efficiency mutagenesis means, adaptive laboratory evolution, and metabolic engineering), the use of low-cost cheap raw materials, and also discussed the future prospects of this field, which could promote the development of lactic acid industry.
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Yi X, Gan Y, Jiang L, Yu L, Liu Y, Gao C. Rapid improvement in the macrolactins production of Bacillus sp. combining atmospheric room temperature plasma with the specific growth rate index. J Biosci Bioeng 2020; 130:48-53. [DOI: 10.1016/j.jbiosc.2020.02.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 01/09/2020] [Accepted: 02/13/2020] [Indexed: 02/06/2023]
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Novel mutagenesis and screening technologies for food microorganisms: advances and prospects. Appl Microbiol Biotechnol 2020; 104:1517-1531. [DOI: 10.1007/s00253-019-10341-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 12/19/2019] [Accepted: 12/28/2019] [Indexed: 12/19/2022]
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D-Lactic acid fermentation performance and the enzyme activity of a novel bacterium Terrilactibacillus laevilacticus SK5–6. ANN MICROBIOL 2019. [DOI: 10.1007/s13213-019-01538-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Abstract
Purpose
The aim of this study was to prove that Terrilactibacillus laevilacticus SK5-6, a novel D-lactate producer, exhibited a good fermentation performance comparing to the reference D-lactate producer Sporolactobacillus sp.
Methods
Glucose bioconversion for D-lactate production and the activity of five key enzymes including phosphofructokinase (PFK), pyruvate kinase (PYK), D-lactate dehydrogenase (D-LDH), L-lactate dehydrogenase (L-LDH), and lactate isomerase (LI) were investigated in the cultivation of T. laevilacticus SK5–6 and S. laevolacticus 0361T.
Results
T. laevilacticus SK5–6 produced D-lactate at higher yield, productivity, and optical purity compared with S. laevolacticus 0361T. T. laevilacticus SK5–6, the catalase-positive isolate, simultaneously grew and produced D-lactate without lag phase while delayed growth and D-lactate production were observed in the culture of S. laevolacticus 0361T. The higher production of D-lactate in T. laevilacticus SK5–6 was due to the higher growth rate and the higher specific activities of the key enzymes observed at the early stage of the fermentation. The low isomerization activity was responsible for the high optical purity of D-lactate in the cultivation of T. laevilacticus SK5–6.
Conclusion
The lowest specific activity of PFK following by PYK and D/L-LDHs, respectively, indicated that the conversion of fructose-6-phosphate was the rate limiting step. Under the well-optimized conditions, the activation of D/L-LDHs by fructose-1,6-phosphate and ATP regeneration by PYK drove glucose bioconversion toward D-lactate. The optical purity of D-lactate was controlled by D/L-LDHs and the activation of isomerases. High D-LDH with limited isomerase activity was preferable during the fermentation as it assured the high optical purity.
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Elevated H2AX Phosphorylation Observed with kINPen Plasma Treatment Is Not Caused by ROS-Mediated DNA Damage but Is the Consequence of Apoptosis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:8535163. [PMID: 31641425 PMCID: PMC6770374 DOI: 10.1155/2019/8535163] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/23/2019] [Accepted: 08/26/2019] [Indexed: 12/11/2022]
Abstract
Phosphorylated histone 2AX (γH2AX) is a long-standing marker for DNA double-strand breaks (DSBs) from ionizing radiation in the field of radiobiology. This led to the perception of γH2AX being a general marker of direct DNA damage with the treatment of other agents such as low-dose exogenous ROS that unlikely act on cellular DNA directly. Cold physical plasma confers biomedical effects majorly via release of reactive oxygen and nitrogen species (ROS). In vitro, increase of γH2AX has often been observed with plasma treatment, leading to the conclusion that DNA damage is a direct consequence of plasma exposure. However, increase in γH2AX also occurs during apoptosis, which is often observed with plasma treatment as well. Moreover, it must be questioned if plasma-derived ROS can reach into the nucleus and still be reactive enough to damage DNA directly. We investigated γH2AX induction in a lymphocyte cell line upon ROS exposure (plasma, hydrogen peroxide, or hypochlorous acid) or UV-B light. Cytotoxicity and γH2AX induction was abrogated by the use of antioxidants with all types of ROS treatment but not UV radiation. H2AX phosphorylation levels were overall independent of analyzing either all nucleated cells or segmenting γH2AX phosphorylation for each cell cycle phase. SB202190 (p38-MAPK inhibitor) and Z-VAD-FMK (pan-caspase inhibitor) significantly inhibited γH2AX induction upon ROS but not UV treatment. Finally, and despite γH2AX induction, UV but not plasma treatment led to significantly increased micronucleus formation, which is a functional read-out of genotoxic DNA DSBs. We conclude that plasma-mediated and low-ROS γH2AX induction depends on caspase activation and hence is not the cause but consequence of apoptosis induction. Moreover, we could not identify lasting mutagenic effects with plasma treatment despite phosphorylation of H2AX.
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Jiang A, Hu W, Li W, Liu L, Tian X, Liu J, Wang S, Lu D, Chen J. Enhanced production of l-lactic acid by Lactobacillus thermophilus SRZ50 mutant generated by high-linear energy transfer heavy ion mutagenesis. Eng Life Sci 2018; 18:626-634. [PMID: 32624942 PMCID: PMC6999237 DOI: 10.1002/elsc.201800052] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 04/11/2018] [Accepted: 05/02/2018] [Indexed: 12/17/2022] Open
Abstract
The aim of this study was to improve l-lactic acid production of Lactobacillus thermophilus SRZ50. For this purpose, high efficient heavy-ion mutagenesis technique was performed using SRZ50 as the original strain. To enhance the screening efficiency for high yield l-lactic acid producers, a scale-down from shake flask to microtiter plate was developed. The results showed that 24-well U-bottom MTPs could well alternate shake flasks for L. thermophilus cultivation as a scale-down tool due to its a very good comparability to the shake flasks. Based on this microtiter plate screening method, two high l-lactic acid productivity mutants, A59 and A69, were successfully screened out, which presented, respectively, 15.8 and 16.2% higher productivities than that of the original strain. Based on fed-batch fermentation, the A69 mutant can accumulate 114.2 g/L l-lactic acid at 96 h. Hence, the proposed traditional microbial breeding method with efficient high-throughput screening assay was proved to be an appropriate strategy to obtain lactic acid-overproducing strain.
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Affiliation(s)
- Ai‐lian Jiang
- Department of BiophysicsInstitute of Modern PhysicsChinese Academy of SciencesLanzhouP. R. China
- University of Chinese Academy of SciencesBeijingP. R. China
| | - Wei Hu
- Department of BiophysicsInstitute of Modern PhysicsChinese Academy of SciencesLanzhouP. R. China
| | - Wen‐jian Li
- Department of BiophysicsInstitute of Modern PhysicsChinese Academy of SciencesLanzhouP. R. China
| | - Lu Liu
- Department of BiophysicsInstitute of Modern PhysicsChinese Academy of SciencesLanzhouP. R. China
- University of Chinese Academy of SciencesBeijingP. R. China
| | - Xue‐jiao Tian
- Department of BiophysicsInstitute of Modern PhysicsChinese Academy of SciencesLanzhouP. R. China
- University of Chinese Academy of SciencesBeijingP. R. China
| | - Jing Liu
- Department of BiophysicsInstitute of Modern PhysicsChinese Academy of SciencesLanzhouP. R. China
| | - Shu‐yang Wang
- Department of BiophysicsInstitute of Modern PhysicsChinese Academy of SciencesLanzhouP. R. China
| | - Dong Lu
- Department of BiophysicsInstitute of Modern PhysicsChinese Academy of SciencesLanzhouP. R. China
| | - Ji‐hong Chen
- Department of BiophysicsInstitute of Modern PhysicsChinese Academy of SciencesLanzhouP. R. China
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9
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Liang S, Gao D, Liu H, Wang C, Wen J. Metabolomic and proteomic analysis of D-lactate-producing Lactobacillus delbrueckii under various fermentation conditions. J Ind Microbiol Biotechnol 2018; 45:681-696. [PMID: 29808292 DOI: 10.1007/s10295-018-2048-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 05/19/2018] [Indexed: 11/29/2022]
Abstract
As an important feedstock monomer for the production of biodegradable stereo-complex poly-lactic acid polymer, D-lactate has attracted much attention. To improve D-lactate production by microorganisms such as Lactobacillus delbrueckii, various fermentation conditions were performed, such as the employment of anaerobic fermentation, the utilization of more suitable neutralizing agents, and exploitation of alternative nitrogen sources. The highest D-lactate titer could reach 133 g/L under the optimally combined fermentation condition, increased by 70.5% compared with the control. To decipher the potential mechanisms of D-lactate overproduction, the time-series response of intracellular metabolism to different fermentation conditions was investigated by GC-MS and LC-MS/MS-based metabolomic analysis. Then the metabolomic datasets were subjected to weighted correlation network analysis (WGCNA), and nine distinct metabolic modules and eight hub metabolites were identified to be specifically associated with D-lactate production. Moreover, a quantitative iTRAQ-LC-MS/MS proteomic approach was employed to further analyze the change of intracellular metabolism under the combined fermentation condition, identifying 97 up-regulated and 42 down-regulated proteins compared with the control. The in-depth analysis elucidated how the key factors exerted influence on D-lactate biosynthesis. The results revealed that glycolysis and pentose phosphate pathways, transport of glucose, amino acids and peptides, amino acid metabolism, peptide hydrolysis, synthesis of nucleotides and proteins, and cell division were all strengthened, while ATP consumption for exporting proton, cell damage, metabolic burden caused by stress response, and bypass of pyruvate were decreased under the combined condition. These might be the main reasons for significantly improved D-lactate production. These findings provide the first omics view of cell growth and D-lactate overproduction in L. delbrueckii, which can be a theoretical basis for further improving the production of D-lactate.
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Affiliation(s)
- Shaoxiong Liang
- 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), Tianjin, 300072, People's Republic of China
| | - Dacheng Gao
- Dalian Research Institute of Petroleum and Petrochemicals, SINOPEC, Dalian, 116000, People's Republic of China
| | - Huanhuan Liu
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin, 300457, China.,Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Cheng Wang
- 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), Tianjin, 300072, 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), Tianjin, 300072, People's Republic of China.
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10
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Microbial mutagenesis by atmospheric and room-temperature plasma (ARTP): the latest development. BIORESOUR BIOPROCESS 2018. [DOI: 10.1186/s40643-018-0200-1] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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11
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Prasirtsak B, Thitiprasert S, Tolieng V, Assabumrungrat S, Tanasupawat S, Thongchul N. Characterization of D-lactic acid, spore-forming bacteria and Terrilactibacillus laevilacticus SK5-6 as potential industrial strains. ANN MICROBIOL 2017. [DOI: 10.1007/s13213-017-1306-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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12
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Fan X, Wu H, Li G, Yuan H, Zhang H, Li Y, Xie X, Chen N. Improvement of uridine production of Bacillus subtilis by atmospheric and room temperature plasma mutagenesis and high-throughput screening. PLoS One 2017; 12:e0176545. [PMID: 28472077 PMCID: PMC5417507 DOI: 10.1371/journal.pone.0176545] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 04/12/2017] [Indexed: 12/30/2022] Open
Abstract
In the present study, a novel breeding strategy of atmospheric and room temperature plasma (ARTP) mutagenesis was used to improve the uridine production of engineered Bacillus subtilis TD12np. A high-throughput screening method was established using both resistant plates and 96-well microplates to select the ideal mutants with diverse phenotypes. Mutant F126 accumulated 5.7 and 30.3 g/L uridine after 30 h in shake-flask and 48 h in fed-batch fermentation, respectively, which represented a 4.4- and 8.7-fold increase over the parent strain. Sequence analysis of the pyrimidine nucleotide biosynthetic operon in the representative mutants showed that proline 1016 and glutamate 949 in the large subunit of B. subtilis carbamoyl phosphate synthetase were of importance for the allosteric regulation caused by uridine 5′-monophosphate. The proposed mutation method with efficient high-throughput screening assay was proved to be an appropriate strategy to obtain uridine-overproducing strain.
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Affiliation(s)
- Xiaoguang Fan
- National and Local United Engineering Lab of Metabolic Control Fermentation Technology, Tianjin University of Science and Technology, Tianjin, P. R. China
- Key Laboratory of Microbial Engineering of China Light Industry, Tianjin University of Science and Technology, Tianjin, China
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P. R. China
| | - Heyun Wu
- National and Local United Engineering Lab of Metabolic Control Fermentation Technology, Tianjin University of Science and Technology, Tianjin, P. R. China
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P. R. China
| | - Guoliang Li
- National and Local United Engineering Lab of Metabolic Control Fermentation Technology, Tianjin University of Science and Technology, Tianjin, P. R. China
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P. R. China
| | - Hui Yuan
- National and Local United Engineering Lab of Metabolic Control Fermentation Technology, Tianjin University of Science and Technology, Tianjin, P. R. China
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P. R. China
| | - Hongchao Zhang
- National and Local United Engineering Lab of Metabolic Control Fermentation Technology, Tianjin University of Science and Technology, Tianjin, P. R. China
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P. R. China
| | - Yanjun Li
- National and Local United Engineering Lab of Metabolic Control Fermentation Technology, Tianjin University of Science and Technology, Tianjin, P. R. China
- Key Laboratory of Microbial Engineering of China Light Industry, Tianjin University of Science and Technology, Tianjin, China
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P. R. China
| | - Xixian Xie
- National and Local United Engineering Lab of Metabolic Control Fermentation Technology, Tianjin University of Science and Technology, Tianjin, P. R. China
- Key Laboratory of Microbial Engineering of China Light Industry, Tianjin University of Science and Technology, Tianjin, China
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P. R. China
- * E-mail: (XX); (NC)
| | - Ning Chen
- National and Local United Engineering Lab of Metabolic Control Fermentation Technology, Tianjin University of Science and Technology, Tianjin, P. R. China
- Key Laboratory of Microbial Engineering of China Light Industry, Tianjin University of Science and Technology, Tianjin, China
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P. R. China
- * E-mail: (XX); (NC)
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Li J, Sun J, Wu B, He B. Combined utilization of nutrients and sugar derived from wheat bran for d-Lactate fermentation by Sporolactobacillus inulinus YBS1-5. BIORESOURCE TECHNOLOGY 2017; 229:33-38. [PMID: 28092734 DOI: 10.1016/j.biortech.2016.12.101] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 12/24/2016] [Accepted: 12/27/2016] [Indexed: 06/06/2023]
Abstract
To decrease d-Lactate production cost, wheat bran, a low-cost waste of milling industry, was selected as the sole feedstock. First, the nutrients were recovered from wheat bran by acid protease hydrolysis. Then, cellulosic hydrolysates were prepared from protease-treated samples after acid pretreatment and enzymatic saccharification. The combined use of nutrients and hydrolysates as nitrogen and carbon sources for fermentation by S. inulinus YB1-5 resulted in d-Lactate levels of 99.5g/L, with an average production efficiency of 1.94g/L/h and a yield of 0.89g/g glucose. Moreover, fed-batch simultaneous saccharification and fermentation process at 40°C, 20% (w/v) solid loading and 20FPU/g solid cellulase concentration was obtained. d-Lactate concentrations, yield, productivity, and optical purity were 87.3g/L, 0.65g/g glucose, 0.81g/L/h and 99.1%, respectively. This study provided a feasible procedure that can help produce cellulosic d-Lactate using agricultural waste without external nutrient supplementation.
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Affiliation(s)
- Jiahuang Li
- School of Life Sciences, Nanjing University, 163 Xianlin Road, Nanjing 210023, Jiangsu, China
| | - Junfei Sun
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China
| | - Bin Wu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China; Jiangsu National Synergetic Innovation Center for Advanced Materials, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China.
| | - Bingfang He
- Jiangsu National Synergetic Innovation Center for Advanced Materials, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China; School of Pharmaceutical Sciences, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China
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14
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Zheng L, Liu M, Sun J, Wu B, He B. Sodium ions activated phosphofructokinase leading to enhanced D-lactic acid production by Sporolactobacillus inulinus using sodium hydroxide as a neutralizing agent. Appl Microbiol Biotechnol 2017; 101:3677-3687. [PMID: 28190098 DOI: 10.1007/s00253-017-8120-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Revised: 12/20/2016] [Accepted: 01/10/2017] [Indexed: 10/20/2022]
Abstract
Sporolactobacillus inulinus is a superior D-lactic acid-producing bacterium and proposed species for industrial production. The major pathway for D-lactic acid biosynthesis, glycolysis, is mainly regulated via the two irreversible steps catalyzed by the allosteric enzymes, phosphofructokinase (PFK) and pyruvate kinase. The activity level of PFK was significantly consistent with the cell growth and D-lactic acid production, indicating its vital role in control and regulation of glycolysis. In this study, the ATP-dependent PFK from S. inulinus was expressed in Escherichia coli and purified to homogeneity. The PFK was allosterically activated by both GDP and ADP and inhibited by phosphoenolpyruvate; the addition of activators could partly relieve the inhibition by phosphoenolpyruvate. Furthermore, monovalent cations could enhance the activity, and Na+ was the most efficient one. Considering this kind activation, NaOH was investigated as the neutralizer instead of the traditional neutralizer CaCO3. In the early growth stage, the significant accelerated glucose consumption was achieved in the NaOH case probably for the enhanced activity of Na+-activated PFK. Using NaOH as the neutralizer at pH 6.5, the fermentation time was greatly shortened about 22 h; simultaneously, the glucose consumption rate and the D-lactic acid productivity were increased by 34 and 17%, respectively. This probably contributed to the increased pH and Na+-promoted activity of PFK. Thus, fermentations by S. inulinus using the NaOH neutralizer provide a green and highly efficient D-lactic acid production with easy subsequent purification.
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Affiliation(s)
- Lu Zheng
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, Jiangsu, 211816, China.,State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu, 210008, China
| | - Mingqing Liu
- Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection of China, Nanjing, Jiangsu, 210042, China
| | - Jiaduo Sun
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, Jiangsu, 211816, China
| | - Bin Wu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, Jiangsu, 211816, China
| | - Bingfang He
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, Jiangsu, 211816, China. .,School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing, Jiangsu, 211816, China.
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15
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Biotechnological production of enantiomerically pure d-lactic acid. Appl Microbiol Biotechnol 2016; 100:9423-9437. [DOI: 10.1007/s00253-016-7843-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 09/04/2016] [Accepted: 09/07/2016] [Indexed: 12/13/2022]
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16
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Bai Z, Gao Z, Sun J, Wu B, He B. D-Lactic acid production by Sporolactobacillus inulinus YBS1-5 with simultaneous utilization of cottonseed meal and corncob residue. BIORESOURCE TECHNOLOGY 2016; 207:346-352. [PMID: 26897413 DOI: 10.1016/j.biortech.2016.02.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 01/31/2016] [Accepted: 02/01/2016] [Indexed: 06/05/2023]
Abstract
d-Lactic acid, is an important organic acid produced from agro-industrial wastes by Sporolactobacillus inulinus YBS1-5 was investigated to reduce the raw material cost of fermentation. The YBS1-5 strain could produce d-lactic acid by using cottonseed meal as the sole nitrogen source. For efficient utilization, the cottonseed meal was enzymatically hydrolyzed and simultaneously utilized during d-lactic acid fermentation. Corncob residues are rich in cellulose and can be enzymatically hydrolyzed without pretreatment. The hydrolysate of this lignocellulosic waste could be utilized by strain YBS1-5 as a carbon source for d-lactic acid production. Under optimal conditions, a high d-lactic acid concentration (107.2g/L) was obtained in 7-L fed-batch fermenter, with an average productivity of 1.19g/L/h and a yield of 0.85g/g glucose. The optical purity of d-lactic acid in the broth was 99.2%. This study presented a new approach for low-cost production of d-lactic acid for an industrial application.
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Affiliation(s)
- Zhongzhong Bai
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China
| | - Zhen Gao
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China
| | - Junfei Sun
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China
| | - Bin Wu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China.
| | - Bingfang He
- School of Pharmaceutical Sciences, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China
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17
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Reddy Tadi SR, E. V. R. A, Limaye AM, Sivaprakasam S. Enhanced production of optically pure d
(-) lactic acid from nutritionally rich Borassus flabellifer
sugar and whey protein hydrolysate based-fermentation medium. Biotechnol Appl Biochem 2016; 64:279-289. [DOI: 10.1002/bab.1470] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Accepted: 12/11/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Subbi Rami Reddy Tadi
- BioPAT Laboratory; Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati India
| | - Arun E. V. R.
- BioPAT Laboratory; Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati India
| | - Anil Mukund Limaye
- BioPAT Laboratory; Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati India
| | - Senthilkumar Sivaprakasam
- BioPAT Laboratory; Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati India
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18
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Li Q, Hudari MSB, Wu JC. Production of Optically Pure D-Lactic Acid by the Combined use of Weissella sp. S26 and Bacillus sp. ADS3. Appl Biochem Biotechnol 2015; 178:285-93. [DOI: 10.1007/s12010-015-1871-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 09/23/2015] [Indexed: 11/24/2022]
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