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Ji Y, Li J, Liang Y, Li L, Wang Y, Pi L, Xing P, Nomura CT, Chen S, Zhu C, Wang Q. Engineering the Tat-secretion pathway of Bacillus licheniformis for the secretion of cytoplasmic enzyme arginase. Appl Microbiol Biotechnol 2024; 108:89. [PMID: 38194145 DOI: 10.1007/s00253-023-12917-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 10/06/2023] [Accepted: 10/16/2023] [Indexed: 01/10/2024]
Abstract
The industrial bacterium Bacillus licheniformis has long been used as a microbial factory for the production of enzymes due to its ability to secrete copious amounts of native extracellular proteins and its generally regarded as safe (GRAS) status. However, most attempts to use B. licheniformis to produce heterologous and cytoplasmic enzymes primarily via the general secretory (Sec) pathway have had limited success. The twin-arginine transport (Tat) pathway offers a promising alternative for the extracellular export of Sec-incompatible proteins because it transports full, correctly folded proteins. However, compared to the Sec pathway, the yields of the Tat pathway have historically been too low for commercial use. To improve the export efficiency of the Tat pathway, we identified the optimal Tat-dependent signal peptides and increased the abundance of the Tat translocases, the signal peptidase (SPase), and the intracellular chaperones. These strategic modifications significantly improved the Tat-dependent secretion of the cytoplasmic enzyme arginase into the culture medium using B. licheniformis. The extracellular enzymatic activity of arginase showed a 5.2-fold increase after these modifications. Moreover, compared to the start strain B. licheniformis 0F3, the production of extracellular GFP was improved by 3.8 times using the strategic modified strain B. licheniformis 0F13, and the extracellular enzymatic activity of SOX had a 1.3-fold increase using the strain B. licheniformis 0F14. This Tat-based production chassis has the potential for enhanced production of Sec-incompatible enzymes, therefore expanding the capability of B. licheniformis as an efficient cellular factory for the production of high-value proteins. KEY POINTS: • Systematic genetic modification of Tat-pathway in B. licheniformis. • Significant enhancement of the secretion capacity of Tat pathway for delivery the cytoplasmic enzyme arginase. • A new platform for efficient extracellular production of Sec-incompatible enzymes.
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Affiliation(s)
- Yi Ji
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Environmental Microbial Technology Center of Hubei Province, College of Life Science, Hubei University, Wuhan, 430062, People's Republic of China
| | - Junliang Li
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Environmental Microbial Technology Center of Hubei Province, College of Life Science, Hubei University, Wuhan, 430062, People's Republic of China
| | - Yonglin Liang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Environmental Microbial Technology Center of Hubei Province, College of Life Science, Hubei University, Wuhan, 430062, People's Republic of China
| | - Liang Li
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Environmental Microbial Technology Center of Hubei Province, College of Life Science, Hubei University, Wuhan, 430062, People's Republic of China
| | - Yajun Wang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Environmental Microbial Technology Center of Hubei Province, College of Life Science, Hubei University, Wuhan, 430062, People's Republic of China
| | - Li Pi
- Wuhan Grand Hoyo Co., Ltd, Wuhan, 430075, People's Republic of China
| | - Panpan Xing
- Wuhan Grand Hoyo Co., Ltd, Wuhan, 430075, People's Republic of China
| | - Christopher T Nomura
- Department of Biological Sciences, University of Idaho, 875 Perimeter Drive, Moscow, ID, 83844, USA
| | - Shouwen Chen
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Environmental Microbial Technology Center of Hubei Province, College of Life Science, Hubei University, Wuhan, 430062, People's Republic of China
| | - Chengjun Zhu
- Wuhan Grand Hoyo Co., Ltd, Wuhan, 430075, People's Republic of China.
| | - Qin Wang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Environmental Microbial Technology Center of Hubei Province, College of Life Science, Hubei University, Wuhan, 430062, People's Republic of China.
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Ferrando J, Miñana-Galbis D, Picart P. The Construction of an Environmentally Friendly Super-Secreting Strain of Bacillus subtilis through Systematic Modulation of Its Secretory Pathway Using the CRISPR-Cas9 System. Int J Mol Sci 2024; 25:6957. [PMID: 39000067 PMCID: PMC11240994 DOI: 10.3390/ijms25136957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Revised: 06/12/2024] [Accepted: 06/18/2024] [Indexed: 07/16/2024] Open
Abstract
Achieving commercially significant yields of recombinant proteins in Bacillus subtilis requires the optimization of its protein production pathway, including transcription, translation, folding, and secretion. Therefore, in this study, our aim was to maximize the secretion of a reporter α-amylase by overcoming potential bottlenecks within the secretion process one by one, using a clustered regularly interspaced short palindromic repeat-Cas9 (CRISPR-Cas9) system. The strength of single and tandem promoters was evaluated by measuring the relative α-amylase activity of AmyQ integrated into the B. subtilis chromosome. Once a suitable promoter was selected, the expression levels of amyQ were upregulated through the iterative integration of up to six gene copies, thus boosting the α-amylase activity 20.9-fold in comparison with the strain harboring a single amyQ gene copy. Next, α-amylase secretion was further improved to a 26.4-fold increase through the overexpression of the extracellular chaperone PrsA and the signal peptide peptidase SppA. When the final expression strain was cultivated in a 3 L fermentor for 90 h, the AmyQ production was enhanced 57.9-fold. The proposed strategy allows for the development of robust marker-free plasmid-less super-secreting B. subtilis strains with industrial relevance.
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Affiliation(s)
| | | | - Pere Picart
- Faculty of Pharmacy and Food Science Technology, Department of Biology, Healthcare and the Environment, Microbiology Section, Universitat de Barcelona, Avinguda Diagonal 643, 08028 Barcelona, Spain; (J.F.); (D.M.-G.)
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Zhang M, Zhen J, Teng J, Zhao X, Fu X, Song H, Zhang Y, Zheng H, Bai W. N-Terminal Sequences of Signal Peptides Assuming Critical Roles in Expression of Heterologous Proteins in Bacillus subtilis. Microorganisms 2024; 12:1275. [PMID: 39065044 PMCID: PMC11278945 DOI: 10.3390/microorganisms12071275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 06/19/2024] [Accepted: 06/20/2024] [Indexed: 07/28/2024] Open
Abstract
The N-terminal sequences of proteins and their corresponding encoding sequences may play crucial roles in the heterologous expression. In this study, the secretory expression of alkaline pectin lyase APL in B. subtilis was investigated to explore the effects of the N-terminal 5-7 amino acid sequences of different signal peptides on the protein expression and secretion. It was identified for the first time that the first five amino acid sequences of the N-terminal of the signal peptide (SP-LipA) from Bacillus subtilis lipase A play an important role in promoting the expression of APL. Furthermore, it was revealed that SP-LipA resulted in higher secretory expression compared to other signal peptides in this study primarily due to its encoding of N-terminal amino acids with relatively higher transcription levels and its efficient secretion capacity. Based on this foundation, the recombinant strain constructed in this work achieved a new record for the highest extracellular yields of APL in B. subtilis, reaching 12,295 U/mL, which was 1.9-times higher than that expressed in the recombinant Escherichia coli strain previously reported. The novel theories uncovered in this study are expected to play significant roles in enhancing the expression of foreign proteins both inside and outside of cells.
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Affiliation(s)
- Meijuan Zhang
- College of Life Science and Agriculture Forestry, Qiqihar University, Qiqihar 161006, China;
| | - Jie Zhen
- Industrial Enzymes National Engineering Research Center, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China; (J.Z.)
- National Center of Technology Innovation for Synthetic Biology, Tianjin 300308, China
- Tianjin Key Laboratory for Industrial Biological Systems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
| | - Jia Teng
- Industrial Enzymes National Engineering Research Center, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China; (J.Z.)
- College of Food Science and Biotechnology, Tianjin Agricultural University, Tianjin 300392, China;
| | - Xingya Zhao
- Industrial Enzymes National Engineering Research Center, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China; (J.Z.)
- National Center of Technology Innovation for Synthetic Biology, Tianjin 300308, China
| | - Xiaoping Fu
- Industrial Enzymes National Engineering Research Center, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China; (J.Z.)
- National Center of Technology Innovation for Synthetic Biology, Tianjin 300308, China
| | - Hui Song
- Industrial Enzymes National Engineering Research Center, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China; (J.Z.)
- National Center of Technology Innovation for Synthetic Biology, Tianjin 300308, China
- Tianjin Key Laboratory for Industrial Biological Systems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
| | - Yeni Zhang
- College of Food Science and Biotechnology, Tianjin Agricultural University, Tianjin 300392, China;
| | - Hongchen Zheng
- Industrial Enzymes National Engineering Research Center, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China; (J.Z.)
- National Center of Technology Innovation for Synthetic Biology, Tianjin 300308, China
- Tianjin Key Laboratory for Industrial Biological Systems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
- Key Laboratory of Engineering Biology for Low-Carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
| | - Wenqin Bai
- Industrial Enzymes National Engineering Research Center, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China; (J.Z.)
- National Center of Technology Innovation for Synthetic Biology, Tianjin 300308, China
- Tianjin Key Laboratory for Industrial Biological Systems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
- Key Laboratory of Engineering Biology for Low-Carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
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Analysis of cross-functionality within LanBTC synthetase complexes from different bacterial sources with respect to production of fully modified lanthipeptides. Appl Environ Microbiol 2021; 88:e0161821. [PMID: 34788067 DOI: 10.1128/aem.01618-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Lanthipeptides belong to a family of ribosomally synthesized and posttranslationally modified peptides (RiPPs) containing (methyl)lanthionine residues. Commonly, class I lanthipeptides are synthesized by a gene cluster encoding a precursor peptide (LanA), a biosynthetic machinery (LanBTC), a protease (LanP), a two-component regulatory system (LanRK), and an immunity system (LanI and LanFEG). Although nisin and subtilin are highly similar class I lanthipeptides, the cross-regulation by LanRK and the cross-immunity by LanI and LanFEG between the nisin and subtilin systems have been proven very low. Here, the possibility of the cross-functionality by LanBTC to modify and transport nisin precursor (NisA) and subtilin precursor (SpaS) was evaluated in Bacillus subtilis and Lactococcus lactis. Interestingly, we found that a promiscuous NisBC-SpaT complex is able to synthesize and export nisin precursor, as efficiently as the native nisin biosynthetic machinery NisBTC, in L. lactis, but not in B. subtilis. The assembly of the NisBC-SpaT complex at a single microdomain, close to the old cell pole, was observed by fluorescence microscopy in L. lactis. In contrast, such a complex was not formed in B. subtilis. Furthermore, the isolation of the NisBC-SpaT complex and its subcomplexes from the cytoplasmic membrane of L. lactis by pull-down assays was successfully conducted. Our work demonstrates that the association of LanBC with LanT is critical for the efficient biosynthesis and secretion of the lanthipeptide precursor with complete modifications, and suggests a cooperative mechanism between LanBC and LanT in the modification and transport processes. IMPORTANCE A multimeric synthetase LanBTC complex has been proposed for the in vivo production of class I lanthipeptides. However, it has been demonstrated that LanB, LanC, and LanT can perform their functionality in vivo and in vitro, independently of other Lan proteins. The role of protein-protein interactions, especially between the modification complex LanBC and the transport system LanT, in the biosynthesis process of lanthipeptides is still unclear. In this study, the importance of the presence of a well-installed LanBTC complex in the cell membrane for lanthipeptide biosynthesis and transport was reinforced. In L. lactis, the recruitment of SpaT from the peripheral cell membrane to the cell poles by the NisBC complex was observed, which may explain the mechanism by which secretion of premature peptide is prevented.
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Zhao S, Xu W, Zhang W, Wu H, Guang C, Mu W. In-depth biochemical identification of a novel methyl parathion hydrolase from Azohydromonas australica and its high effectiveness in the degradation of various organophosphorus pesticides. BIORESOURCE TECHNOLOGY 2021; 323:124641. [PMID: 33429316 DOI: 10.1016/j.biortech.2020.124641] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 12/27/2020] [Accepted: 12/28/2020] [Indexed: 06/12/2023]
Abstract
Organophosphorus pesticides are highly toxic phosphate compounds with the general structure of O = P(OR)3 and threaten human health seriously. Methyl parathion hydrolase from microbial is an important enzyme to degrade organophosphorus pesticides (OPs) into less toxic or nontoxic compounds like. p-nitrophenol and diethyl phosphate. Here, a gene encoding methyl parathion hydrolase from Azohydromonas australica was firstly cloned and expressed in Escherichia coli. The recombinant hydrolase showed its optimal pH and temperature at pH 9.5 and 50 °C. Leveraging 1 mM Mn2+, the enzyme activity was significantly enhanced by 29.3-fold, and the thermostability at 40 and 50 °C was also improved. The recombinant MPH showed the specific activity of 4.94 and 16.0 U/mg towards methyl parathion and paraoxon, respectively. Moreover, A. australica MPH could effectively degrade various of OPs pesticides including methyl parathion, paraoxon, dichlorvos and chlorpyrifos in a few minutes, suggesting a great potential in the bioremediation of OPs pesticides.
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Affiliation(s)
- Sumao Zhao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wei Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wenli Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Hao Wu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Cuie Guang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China.
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China.
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Han L, Cui W, Suo F, Miao S, Hao W, Chen Q, Guo J, Liu Z, Zhou L, Zhou Z. Development of a novel strategy for robust synthetic bacterial promoters based on a stepwise evolution targeting the spacer region of the core promoter in Bacillus subtilis. Microb Cell Fact 2019; 18:96. [PMID: 31142347 PMCID: PMC6540529 DOI: 10.1186/s12934-019-1148-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 05/22/2019] [Indexed: 01/06/2023] Open
Abstract
Background Promoter evolution by synthetic promoter library (SPL) is a powerful approach to development of functional synthetic promoters to synthetic biology. However, it requires much tedious and time-consuming screenings because of the plethora of different variants in SPL. Actually, a large proportion of mutants in the SPL are significantly lower in strength, which contributes only to fabrication of a promoter library with a continuum of strength. Thus, to effectively obtain the evolved synthetic promoter exhibiting higher strength, it is essential to develop novel strategies to construct mutant library targeting the pivotal region rather than the arbitrary region of the template promoter. In this study, a strategy termed stepwise evolution targeting the spacer of core promoter (SETarSCoP) was established in Bacillus subtilis to effectively evolve the strength of bacterial promoter. Results The native promoter, PsrfA, from B. subtilis, which exhibits higher strength than the strong promoter P43, was set as the parental template. According to the comparison of conservation of the spacer sequences between − 35 box and − 10 box among a set of strong and weak native promoter, it revealed that 7-bp sequence immediately upstream of the − 10 box featured in the regulation of promoter strength. Based on the conservative feature, two rounds of consecutive evolution were performed targeting the hot region of PsrfA. In the first round, a primary promoter mutation library (pPML) was constructed by mutagenesis targeting the 3-bp sequence immediately upstream of the − 10 box of the PsrfA. Subsequently, four evolved mutants from pPML were selected to construction of four secondary promoter mutation libraries (sPMLs) based on mutagenesis of the 4-bp sequence upstream of the first-round target. After the consecutive two-step evolution, the mutant PBH4 was identified and verified to be a highly evolved synthetic promoter. The strength of PBH4 was higher than PsrfA by approximately 3 times. Moreover, PBH4 also exhibited broad suitability for different cargo proteins, such as β-glucuronidase and nattokinase. The proof-of-principle test showed that SETarSCoP successfully evolved both constitutive and inducible promoters. Conclusion Comparing with the commonly used SPL strategy, SETarSCoP facilitates the evolution process to obtain strength-evolved synthetic bacterial promoter through fabrication and screening of small-scale mutation libraries. This strategy will be a promising method to evolve diverse bacterial promoters to expand the toolbox for synthetic biology. Electronic supplementary material The online version of this article (10.1186/s12934-019-1148-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Laichuang Han
- School of Biotechnology, Key Laboratory of Industrial Biotechnology (Ministry of Education), Jiangnan University, Wuxi, 214122, Jiangsu, China
| | - Wenjing Cui
- School of Biotechnology, Key Laboratory of Industrial Biotechnology (Ministry of Education), Jiangnan University, Wuxi, 214122, Jiangsu, China.
| | - Feiya Suo
- School of Biotechnology, Key Laboratory of Industrial Biotechnology (Ministry of Education), Jiangnan University, Wuxi, 214122, Jiangsu, China
| | - Shengnan Miao
- School of Biotechnology, Key Laboratory of Industrial Biotechnology (Ministry of Education), Jiangnan University, Wuxi, 214122, Jiangsu, China
| | - Wenliang Hao
- School of Biotechnology, Key Laboratory of Industrial Biotechnology (Ministry of Education), Jiangnan University, Wuxi, 214122, Jiangsu, China
| | - Qiaoqing Chen
- School of Biotechnology, Key Laboratory of Industrial Biotechnology (Ministry of Education), Jiangnan University, Wuxi, 214122, Jiangsu, China
| | - Junling Guo
- School of Biotechnology, Key Laboratory of Industrial Biotechnology (Ministry of Education), Jiangnan University, Wuxi, 214122, Jiangsu, China
| | - Zhongmei Liu
- School of Biotechnology, Key Laboratory of Industrial Biotechnology (Ministry of Education), Jiangnan University, Wuxi, 214122, Jiangsu, China
| | - Li Zhou
- School of Biotechnology, Key Laboratory of Industrial Biotechnology (Ministry of Education), Jiangnan University, Wuxi, 214122, Jiangsu, China
| | - Zhemin Zhou
- School of Biotechnology, Key Laboratory of Industrial Biotechnology (Ministry of Education), Jiangnan University, Wuxi, 214122, Jiangsu, China.
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Li D, Fu G, Tu R, Jin Z, Zhang D. High-efficiency expression and secretion of human FGF21 in Bacillus subtilis by intercalation of a mini-cistron cassette and combinatorial optimization of cell regulatory components. Microb Cell Fact 2019; 18:17. [PMID: 30691455 PMCID: PMC6348689 DOI: 10.1186/s12934-019-1066-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 01/20/2019] [Indexed: 11/10/2022] Open
Abstract
Background Recombinant human Fibroblast growth factor 21 (rhFGF21) is an endocrine hormone that has profound effects on treatment of metabolic diseases. However, rhFGF21 is prone to form inclusion body when expressed in bacteria, which results in, the downstream process of purification of bioactive rhFGF21 is time-consuming and labor intensive. The aim of this work is to explore a new method for improving the soluble expression and secretion level of rhFGF21 in B. subtilis. Results A codon optimized rhFGF21 gene was expressed under the control of a strong inducible promoter PmalA in B. subtilis. A mini-cistron cassette (from gsiB) was located upstream of rhFGF21 in expression vector (pMATEFc5), which could reduce the locally stabilized mRNA secondary structure of transcripts and enhance the efficiency of translation initiation. Then various chaperones were further overexpressed to improve the expression efficiency of rhFGF21. Results showed that overexpression of the chaperone DnaK contributed to the increase of solubility of rhFGF21. Moreover, an extracellular proteases deficient strain B. subtilis Kno6cf was used to accumulate the secreted rhFGF21 solidly. In addition, eleven signal peptides from B. subtilis were evaluated and the SPdacB appeared the highest secretion yield of rhFGF21 in B. subtilis. Finally, the combinatorial optimized strain achieved an about ninefold increase of the soluble rhFGF21 production after 24 h of flask fermentation in comparison with the initial production strain. Conclusion This work provided a comprehensive strategy for secretory expressing the heterologous protein rhFGF21 in B. subtilis. To our knowledge, this is the first report of the highly efficient production of rhFGF21 in B. subtilis and this approach may provide some suggestions for heterologous proteins production in B. subtilis. Electronic supplementary material The online version of this article (10.1186/s12934-019-1066-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Dandan Li
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, People's Republic of China.,Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, People's Republic of China
| | - Gang Fu
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, People's Republic of China.,Key Laboratory of Systems Microbial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, People's Republic of China
| | - Ran Tu
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, People's Republic of China
| | - Zhaoxia Jin
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, People's Republic of China.
| | - Dawei Zhang
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, People's Republic of China. .,Key Laboratory of Systems Microbial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, People's Republic of China.
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Huang X, Cao L, Qin Z, Li S, Kong W, Liu Y. Tat-Independent Secretion of Polyethylene Terephthalate Hydrolase PETase in Bacillus subtilis 168 Mediated by Its Native Signal Peptide. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:13217-13227. [PMID: 30465427 DOI: 10.1021/acs.jafc.8b05038] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Widespread utilization of polyethylene terephthalate (PET) has caused critical environmental pollution. The enzymatic degradation of PET is a promising solution to this problem. In this study, PETase, which exhibits much higher PET-hydrolytic activity than other enzymes, was successfully secreted into extracellular milieu from Bacillus subtilis 168 under the direction of its native signal peptide (named SPPETase). SPPETase is predicted to be a twin-arginine signal peptide. Intriguingly, inactivation of twin-arginine translocation (Tat) complexes improved the secretion amount by 3.8-fold, indicating that PETase was exported via Tat-independent pathway. To the best of our knowledge, this is the first report on the improvement of Tat-independent secretion by inactivating Tat components of B. subtilis 168 in LB medium. Furthermore, PET film degradation assay showed that the secreted PETase was fully active. This study paves the first step to construct an efficient engineered strain for PET degradation.
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Affiliation(s)
- Xin Huang
- School of Life Sciences, Institute of Aquatic Economic Animals and Guangdong Provincial Key Laboratory for Aquatic Economic Animals, National Engineering Center for Marine Biotechnology of South China Sea , Sun Yat-Sen University , Guangzhou 510275 , P. R. China
| | - Lichuang Cao
- School of Life Sciences, Institute of Aquatic Economic Animals and Guangdong Provincial Key Laboratory for Aquatic Economic Animals, National Engineering Center for Marine Biotechnology of South China Sea , Sun Yat-Sen University , Guangzhou 510275 , P. R. China
| | - Zongmin Qin
- School of Life Sciences, Institute of Aquatic Economic Animals and Guangdong Provincial Key Laboratory for Aquatic Economic Animals, National Engineering Center for Marine Biotechnology of South China Sea , Sun Yat-Sen University , Guangzhou 510275 , P. R. China
| | - Shuifeng Li
- School of Life Sciences, Institute of Aquatic Economic Animals and Guangdong Provincial Key Laboratory for Aquatic Economic Animals, National Engineering Center for Marine Biotechnology of South China Sea , Sun Yat-Sen University , Guangzhou 510275 , P. R. China
| | - Wei Kong
- School of Life Sciences, Institute of Aquatic Economic Animals and Guangdong Provincial Key Laboratory for Aquatic Economic Animals, National Engineering Center for Marine Biotechnology of South China Sea , Sun Yat-Sen University , Guangzhou 510275 , P. R. China
| | - Yuhuan Liu
- School of Life Sciences, Institute of Aquatic Economic Animals and Guangdong Provincial Key Laboratory for Aquatic Economic Animals, National Engineering Center for Marine Biotechnology of South China Sea , Sun Yat-Sen University , Guangzhou 510275 , P. R. China
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Exploitation of Bacillus subtilis as a robust workhorse for production of heterologous proteins and beyond. World J Microbiol Biotechnol 2018; 34:145. [DOI: 10.1007/s11274-018-2531-7] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 09/05/2018] [Indexed: 10/28/2022]
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Jiang XR, Lin YF, Chen PT. Trehalose production via merged secretion, purification, and immobilization of trehalose synthase in Bacillus subtilis. J Taiwan Inst Chem Eng 2018. [DOI: 10.1016/j.jtice.2017.11.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Song Y, Fu G, Dong H, Li J, Du Y, Zhang D. High-Efficiency Secretion of β-Mannanase in Bacillus subtilis through Protein Synthesis and Secretion Optimization. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:2540-2548. [PMID: 28262014 DOI: 10.1021/acs.jafc.6b05528] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The manno endo-1,4-mannosidase (β-mannanase, EC. 3.2.1.78) catalyzes the random hydrolysis of internal (1 → 4)-β-mannosidic linkages in the mannan polymers. A codon optimized β-mannanase gene from Bacillus licheniformis DSM13 was expressed in Bacillus subtilis. When four Sec-dependent and two Tat-dependent signal peptide sequences cloned from B. subtilis were placed upstream of the target gene, the highest activity of β-mannanase was observed using SPlipA as a signal peptide. Then a 1.25-fold activity of β-mannanase was obtained when another copy of groESL operon was inserted into the genome of host strain. Finally, five different promoters were separately used to enhance the synthesis of the target protein. The results showed that promoter Pmglv, a modified maltose-inducible promoter, significantly elevated the production of β-mannanase. After 72 h of flask fermentation, the enzyme activity of β-mannanase in the supernatant when using locust bean gum as substrate reached 2207 U/mL. This work provided a promising β-mannanase production strain in industrial application.
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Affiliation(s)
- Yafeng Song
- Tianjin Institute of Industrial Biotechnology and ‡Key Laboratory of Systems Microbial Biotechnology, Chinese Academy of Sciences , Tianjin 300308, P. R. China
- Department of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen , 9713 AV, Groningen, The Netherlands
| | - Gang Fu
- Tianjin Institute of Industrial Biotechnology and ‡Key Laboratory of Systems Microbial Biotechnology, Chinese Academy of Sciences , Tianjin 300308, P. R. China
| | - Huina Dong
- Tianjin Institute of Industrial Biotechnology and ‡Key Laboratory of Systems Microbial Biotechnology, Chinese Academy of Sciences , Tianjin 300308, P. R. China
| | - Jianjun Li
- National Key Laboratory of Biochemical Engineering, National Engineering Research Center for Biotechnology , Beijing 100190, China
- Key Laboratory of Biopharmaceutical Production & Formulation Engineering, PLA, Institute of Process Engineering, Chinese Academy of Sciences , Beijing 100190, China
| | - Yuguang Du
- National Key Laboratory of Biochemical Engineering, National Engineering Research Center for Biotechnology , Beijing 100190, China
- Key Laboratory of Biopharmaceutical Production & Formulation Engineering, PLA, Institute of Process Engineering, Chinese Academy of Sciences , Beijing 100190, China
| | - Dawei Zhang
- Tianjin Institute of Industrial Biotechnology and ‡Key Laboratory of Systems Microbial Biotechnology, Chinese Academy of Sciences , Tianjin 300308, P. R. China
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Ren GH, Cao LC, Kong W, Wang ZJ, Liu YH. Efficient Secretion of the β-Galactosidase Bgal1-3 via both Tat-Dependent and Tat-Independent Pathways in Bacillus subtilis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:5708-5716. [PMID: 27380825 DOI: 10.1021/acs.jafc.6b01735] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this study, the twin-arginine (Tat) signal peptide PhoD was used to direct the secretion of the β-galactosidase Bgal1-3 into the growth medium of an engineered strain of Bacillus subtilis 168. After 24 h of cultivation, the extracellular activity reached 1.15 U/mL, representing 78% of the total activity. Bgal1-3 was exported via both Tat-dependent and Tat-independent pathways. To improve the secretion amounts, two more copies of the target gene were inserted into the designated loci on the chromosome, further improving the extracellular enzymatic activity to 2.15 U/mL. The engineered strain with three copies of bgal1-3 was genetically stable after 150 generations. To the best of our knowledge, this is the first report on the functional secretion of a heterologous protein via both Tat-dependent and Tat-independent pathways mediated by a Tat signal peptide in B. subtilis. Furthermore, this study provides us with a markerless engineered strain for the production of β-galactosidase.
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Affiliation(s)
- Guang-Hui Ren
- School of Life Sciences and South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Sun Yat-sen University , Guangzhou 510275, P. R. China
| | - Li-Chuang Cao
- School of Life Sciences and South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Sun Yat-sen University , Guangzhou 510275, P. R. China
| | - Wei Kong
- School of Life Sciences and South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Sun Yat-sen University , Guangzhou 510275, P. R. China
| | - Zhi-Jun Wang
- School of Life Sciences and South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Sun Yat-sen University , Guangzhou 510275, P. R. China
| | - Yu-Huan Liu
- School of Life Sciences and South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Sun Yat-sen University , Guangzhou 510275, P. R. China
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Chen J, Zhao L, Fu G, Zhou W, Sun Y, Zheng P, Sun J, Zhang D. A novel strategy for protein production using non-classical secretion pathway in Bacillus subtilis. Microb Cell Fact 2016; 15:69. [PMID: 27125780 PMCID: PMC4850722 DOI: 10.1186/s12934-016-0469-8] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 04/21/2016] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND The Gram-positive bacterium Bacillus subtilis has been widely used as a cell factory for the production of proteins due to its generally regarded as safe (GRAS) nature and secretion capability. Of the known secretory pathways in B. subtilis, the majority of proteins are exported from the cytoplasm by Sec pathway, Tat pathway and ABC transporters, etc. However, the production of heterologous proteins by B. subtilis is unfortunately not that straight forward because of the bottlenecks in classical secretion pathways. The aim of this work is to explore a new method for protein production based on non-classical secretion pathway. RESULTS One D-psicose 3-epimerase (RDPE) which converts D-fructose into D-psicose from Ruminococcus sp. 5_1_39BFAA was successfully and substantially secreted into the extracellular milieu without the direction of signal peptide. Subsequently, we demonstrated that RDPE contained no native signal peptide, and the secretion of RDPE was not dependent on Sec or Tat pathway or due to cell lysis, which indicated that RDPE is a non-classically secreted protein. Then, we attempted to evaluate the possibility of using RDPE as a signal to export eighteen reporter proteins into the culture medium. Five of eleven homologous proteins, two of five heterologous proteins from other bacterium and two heterologous proteins of eukaryotic source were successfully secreted into the extracellular milieu at different secretion levels when they were fused to RDPE mediated by a flexible 21-bp linker to keep a distance between two single proteins. Furthermore, the secretion rates of two fusion proteins (RDPE-DnaK and RDPE-RFP) reached more than 50 %. In addition, most of the fusion proteins retained enzyme or biological activity of their corresponding target proteins, and all of the fusions still had the activity of RDPE. CONCLUSIONS We found and identified a heterologous non-classically secreted protein RDPE, and showed that RDPE could direct proteins of various types into the culture medium, and thus non-classical protein secretion pathway can be used as a novel secretion pathway for recombinant proteins. This novel strategy for recombinant protein production is helpful to make B. subtilis as a more ideal cell factory for protein production.
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Affiliation(s)
- Jingqi Chen
- />Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 People’s Republic of China
- />Key Laboratory of Systems Microbial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 People’s Republic of China
| | - Liuqun Zhao
- />Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 People’s Republic of China
- />Key Laboratory of Systems Microbial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 People’s Republic of China
| | - Gang Fu
- />Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 People’s Republic of China
- />National Engineering Laboratory for Industrial Enzymes, Tianjin, 300308 People’s Republic of China
| | - Wenjuan Zhou
- />Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 People’s Republic of China
- />Key Laboratory of Systems Microbial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 People’s Republic of China
| | - Yuanxia Sun
- />Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 People’s Republic of China
- />National Engineering Laboratory for Industrial Enzymes, Tianjin, 300308 People’s Republic of China
| | - Ping Zheng
- />Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 People’s Republic of China
- />Key Laboratory of Systems Microbial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 People’s Republic of China
| | - Jibin Sun
- />Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 People’s Republic of China
- />Key Laboratory of Systems Microbial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 People’s Republic of China
| | - Dawei Zhang
- />Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 People’s Republic of China
- />Key Laboratory of Systems Microbial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308 People’s Republic of China
- />National Engineering Laboratory for Industrial Enzymes, Tianjin, 300308 People’s Republic of China
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Strategy for efficient production of recombinant Staphylococcus epidermidis lipase in Bacillus subtilis. Biochem Eng J 2015. [DOI: 10.1016/j.bej.2015.07.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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