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Wang B, Wang Y, Zhou X, Gao XD, Fujita M, Li Z. Highly efficient expression of Rasamsonia emersonii lipase in Pichia pastoris: characterization and gastrointestinal simulated digestion in vitro. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:5603-5613. [PMID: 38363126 DOI: 10.1002/jsfa.13390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 02/11/2024] [Accepted: 02/14/2024] [Indexed: 02/17/2024]
Abstract
BACKGROUND Acidic lipases with high catalytic activities under acidic conditions have important application values in the food, feed and pharmaceutical industries. However, the availability of acidic lipases is still the main obstacle to their industrial applications. Although a novel acidic lipase Rasamsonia emersonii (LIPR) was heterologously expressed in Escherichia coli, the expression level was unsatisfactory. RESULTS To achieve the high-efficiency expression and secretion of LIPR in Pichia pastoris GS115, the combinatorial optimization strategy was adopted including gene codon preference, signal peptide, molecular chaperone co-expression and disruption of vacuolar sorting receptor VPS10. The activity of the combinatorial optimization engineered strain in a shake flask reached 1480 U mL-1, which was 8.13 times greater than the P. pastoris GS115 parental strain. After high-density fermentation in a 5-L bioreactor, the highest enzyme activity reached as high as 11 820 U mL-1. LIPR showed the highest activity at 40 °C and pH 4.0 in the presence of Ca2+ ion. LIPR exhibited strong tolerance to methanol, indicating its potential application in biodiesel biosynthesis. Moreover, the gastrointestinal digestion simulation results demonstrated that LIPR was tolerant to pepsin and trypsin, but its activity was inhibited by sodium taurodeoxycholate. CONCLUSION This study provided an effective approach for the high expression of acidic lipase LIPR. LIPR was more appropriate for lipid digestion in the stomach than in intestine according to the gastrointestinal digestion simulation results. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Buqing Wang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Yasen Wang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Xiaoman Zhou
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Xiao-Dong Gao
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Morihisa Fujita
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- Institute for Glyco-Core Research, Gifu University, Gifu, Japan
| | - Zijie Li
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
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Xiao D, Li X, Zhang Y, Wang F. Efficient Expression of Candida antarctica Lipase B in Pichia pastoris and Its Application in Biodiesel Production. Appl Biochem Biotechnol 2023; 195:5933-5949. [PMID: 36723721 DOI: 10.1007/s12010-023-04374-4] [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] [Accepted: 01/10/2023] [Indexed: 02/02/2023]
Abstract
Lipase B from Candida antarctica (CALB) is an important biocatalyst with many potential applications. However, original CALB is usually with lower enzyme activity and also costly to produce from Candida antarctica; hence, it is often necessary to prepare recombinant CALB through gene heterologous expression. In this research, seven promoters and five signal peptides were compared respectively for expressing codon-optimized CALB in Pichia pastoris, and then recombinant P. pastoris containing 3 copies of calb gene were obtained by screening with high concentrations of antibiotics under the condition of the optimal combination. In a 1.3-L bioreactor, the maximum CALB activity and total protein content reached 444.46 ± 18.81 U/mL and 5.41 ± 0.1 g/L, respectively, after about 9 days of incubation in FM22 medium, which were 34 times and 20 times higher than the initial strains, respectively. In addition, the obtained CALB was used to catalyze the transesterification of acidified gutter oil with methanol, suggesting a promising pathway to convert waste or low quality of bio-oil feedstocks with high amount of free fatty acids into biodiesel by using recombinant CALB as catalyst. The results can provide with a good reference for efficient expression of CALB and enhancing lipase production in P. pastoris. It is supposed to bring with new possibility for the bio-production of other valuable proteins.
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Affiliation(s)
- Dunchi Xiao
- Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, China
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Nanjing Forestry University, Nanjing, 210037, China
- Jiangsu Key Laboratory of Biomass-Based Green Fuels and Chemicals, Nanjing Forestry University, Nanjing, 210037, China
| | - Xun Li
- Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, China
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Nanjing Forestry University, Nanjing, 210037, China
- Jiangsu Key Laboratory of Biomass-Based Green Fuels and Chemicals, Nanjing Forestry University, Nanjing, 210037, China
| | - Yu Zhang
- Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, China
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Nanjing Forestry University, Nanjing, 210037, China
- Jiangsu Key Laboratory of Biomass-Based Green Fuels and Chemicals, Nanjing Forestry University, Nanjing, 210037, China
| | - Fei Wang
- Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, China.
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Nanjing Forestry University, Nanjing, 210037, China.
- Jiangsu Key Laboratory of Biomass-Based Green Fuels and Chemicals, Nanjing Forestry University, Nanjing, 210037, China.
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Shao Y, Xue C, Liu W, Zuo S, Wei P, Huang L, Lian J, Xu Z. High-level secretory production of leghemoglobin in Pichia pastoris through enhanced globin expression and heme biosynthesis. BIORESOURCE TECHNOLOGY 2022; 363:127884. [PMID: 36067892 DOI: 10.1016/j.biortech.2022.127884] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/27/2022] [Accepted: 08/29/2022] [Indexed: 05/26/2023]
Abstract
Soy leghemoglobin is a key food additive that imparts meaty flavor and color to meat analogs. Here, a Pichia pastoris strain capable of high-yield secretory production of functional leghemoglobin was developed through gene dosage optimization and heme pathway consolidation. First, multi-copy integration of LegH expression cassette was achieved via both post-transformational vector amplification and CRISPR/Cas9 mediated genome editing methods. A combination of inducible expression and constitutive expression resulted in the highest production of leghemoglobin. Then, heme biosynthetic pathway was engineered to address challenges in heme depletion and leghemoglobin secretion. Finally, the disruption of ku70 was complemented in engineered P. pastoris strain to enable high-density fermentation in a 10-L bioreactor. These engineering strategies increased the secretion of leghemoglobin by more than 83-fold, whose maximal leghemoglobin titer and heme binding ratio reached as high as 3.5 g/L and 93 %, respectively. This represents the highest secretory production of heme-containing proteins ever reported.
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Affiliation(s)
- Youran Shao
- Key Laboratory of Biomass Chemical Engineering (Education Ministry), College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; Institute of Biological Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Changlu Xue
- School of Biological & Chemical Engineering, Zhejiang University of Science & Technology, Hangzhou 310023, China
| | - Wenqian Liu
- Key Laboratory of Biomass Chemical Engineering (Education Ministry), College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; Institute of Biological Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Siqi Zuo
- Key Laboratory of Biomass Chemical Engineering (Education Ministry), College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; Institute of Biological Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Peilian Wei
- School of Biological & Chemical Engineering, Zhejiang University of Science & Technology, Hangzhou 310023, China
| | - Lei Huang
- Key Laboratory of Biomass Chemical Engineering (Education Ministry), College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; Institute of Biological Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jiazhang Lian
- Key Laboratory of Biomass Chemical Engineering (Education Ministry), College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; Institute of Biological Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311200, China.
| | - Zhinan Xu
- Key Laboratory of Biomass Chemical Engineering (Education Ministry), College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; Institute of Biological Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
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Chen H, Lin B, Zhang R, Gong Z, Wen M, Su W, Zhou J, Zhao L, Wang J. Controllable preparation of chitosan oligosaccharides via a recombinant chitosanase from marine Streptomyces lydicus S1 and its potential application on preservation of pre-packaged tofu. Front Microbiol 2022; 13:1007201. [PMID: 36225376 PMCID: PMC9549211 DOI: 10.3389/fmicb.2022.1007201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Accepted: 08/29/2022] [Indexed: 11/13/2022] Open
Abstract
Chitosan oligosaccharides (COSs) are widely applied in many areas due to its various biological activities. Controllable preparation of COSs with desired degree of polymerization (DP) via suitable chitosanase is of great value. Herein, a novel glycoside hydrolase (GH) family 46 chitosanase (SlCsn46) from marine Streptomyces lydicus S1 was prepared, characterized and used to controllably produce COSs with different DP. The specific activity of purified recombinant SlCsn46 was 1,008.5 U/mg. The optimal temperature and pH of purified SlCsn46 were 50°C and 6.0, respectively. Metal ions Mn2+ could improve the stability of SlCsn46. Additionally, SlCsn46 can efficiently hydrolyze 2% and 4% colloidal chitosan to prepare COSs with DP 2–4, 2–5, and 2–6 by adjusting the amount of SlCsn46 added. Moreover, COSs with DP 2–4, 2–5, and 2–6 exhibited potential application value for prolonging the shelf-life of pre-packaged Tofu. The water-holding capacity (WHC), sensorial properties, total viable count (TVC), pH and total volatile base nitrogen (TVB-N) of pre-packed tofu incorporated with 4 mg/mL COSs with DP 2–4, 2–5, and 2–6 were better than those of the control during 15 days of storage at 10°C. Thus, the controllable hydrolysis strategy provides an effective method to prepare COSs with desired DP and its potential application on preservation of pre-packed tofu.
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Affiliation(s)
- Hao Chen
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang, China
- Hunan Provincial Key Laboratory of Soybean Products Processing and Safety Control, Shaoyang, China
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang, China
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Zhanjiang, China
| | - Bilian Lin
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang, China
- Hunan Provincial Key Laboratory of Soybean Products Processing and Safety Control, Shaoyang, China
| | - Rui Zhang
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang, China
- Hunan Provincial Key Laboratory of Soybean Products Processing and Safety Control, Shaoyang, China
| | - Zhouliang Gong
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang, China
- Hunan Provincial Key Laboratory of Soybean Products Processing and Safety Control, Shaoyang, China
| | - Ming Wen
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang, China
- Hunan Provincial Key Laboratory of Soybean Products Processing and Safety Control, Shaoyang, China
| | - Weiming Su
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang, China
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Zhanjiang, China
| | | | - Liangzhong Zhao
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang, China
- Hunan Provincial Key Laboratory of Soybean Products Processing and Safety Control, Shaoyang, China
- *Correspondence: Liangzhong Zhao,
| | - Jianrong Wang
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang, China
- Hunan Provincial Key Laboratory of Soybean Products Processing and Safety Control, Shaoyang, China
- Shenzhen Raink Ecology and Environment Co., Ltd., Shenzhen, China
- Jianrong Wang,
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Isolation and evaluation of strong endogenous promoters for the heterologous expression of proteins in Pichia pastoris. World J Microbiol Biotechnol 2022; 38:226. [PMID: 36121482 DOI: 10.1007/s11274-022-03412-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 09/08/2022] [Indexed: 10/14/2022]
Abstract
BACKGROUND The heterologous expression of biosynthetic pathway genes for pharmaceutical or fine chemical production usually requires to express more than one gene in the host cells. In eukaryotes, the pathway flux is typically balanced by controlling the transcript levels of the genes involved. It is difficult to balance the stoichiometric fine-tuning of the reaction steps of the pathway by acting on one or two promoters. Furthermore, the promoter used should not be identical to avoid loss of inserted genes by recombination or dilute its transcription factors. RESULTS Based on RNA-seq data, 18 candidate genes with the highest transcription levels at three carbon sources (glucose, glycerol and methanol) were selected and their promoter regions were isolated from GS115 genome. The performance of these promoters on the level of protein production was evaluated using LacZ and EGFP genes as the reporters, respectively. These isolated promoters all exhibited activity to express LacZ gene. Using LacZ as a reporter, of the 18 promoter candidates, 9 promoters showed higher expression levels for the reporter compare to pGAP, a strong promoter widely used for constitutive expression of heterologous proteins in Pichia pastoris. These promoters with high expression levels were further employed to evaluate secreted expression using EGFP as a reporter. 6 promoters exhibited stronger protein expression compare to pGAP. Interestingly, the protein expression driven by pFDH1 was slightly higher than that of commonly used pAOX1 at methanol, and methanol-induced expression of pFDH1 was not repressed by glycerol. CONCLUSION The various promoters identified in this study could be used for heterologous expression of biosynthetic pathway genes for pharmaceutical or fine chemical production. the methanol-induced pFDH1 that is not repressed by glycerol is an attractive alternative to pAOX1 and may provide a novel way to produce heterologous proteins in Pichia pastoris.
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Expanding the promoter toolbox for metabolic engineering of methylotrophic yeasts. Appl Microbiol Biotechnol 2022; 106:3449-3464. [PMID: 35538374 DOI: 10.1007/s00253-022-11948-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 04/28/2022] [Accepted: 04/29/2022] [Indexed: 01/31/2023]
Abstract
Methylotrophic yeasts have been widely recognized as a promising host for production of recombinant proteins and value-added chemicals. Promoters for controlled gene expression are critical for construction of efficient methylotrophic yeasts cell factories. Here, we summarized recent advances in characterizing and engineering promoters in methylotrophic yeasts, such as Komagataella phaffii and Ogataea polymorpha. Constitutive and inducible promoters controlled by methanol or other inducers/repressors were introduced to demonstrate their applications in production of proteins and chemicals. Furthermore, efforts of promoter engineering, including site-directed mutagenesis, hybrid promoter, and transcription factor regulation to expand the promoter toolbox were also summarized. This mini-review also provides useful information on promoters for the application of metabolic engineering in methylotrophic yeasts. KEY POINTS: • The characteristics of six methylotrophic yeasts and their promoters are described. • The applications of Komagataella phaffii and Ogataea polymorpha in metabolic engineeringare expounded. • Three promoter engineering strategies are introduced in order to expand the promoter toolbox.
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Yan C, Yu W, Zhai X, Yao L, Guo X, Gao J, Zhou YJ. Characterizing and engineering promoters for metabolic engineering of Ogataea polymorpha. Synth Syst Biotechnol 2022; 7:498-505. [PMID: 34977394 PMCID: PMC8685918 DOI: 10.1016/j.synbio.2021.12.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/04/2021] [Accepted: 12/06/2021] [Indexed: 12/18/2022] Open
Abstract
Bio-manufacturing via microbial cell factory requires large promoter library for fine-tuned metabolic engineering. Ogataea polymorpha, one of the methylotrophic yeasts, possesses advantages in broad substrate spectrum, thermal-tolerance, and capacity to achieve high-density fermentation. However, a limited number of available promoters hinders the engineering of O. polymorpha for bio-productions. Here, we systematically characterized native promoters in O. polymorpha by both GFP fluorescence and fatty alcohol biosynthesis. Ten constitutive promoters (PPDH, PPYK, PFBA, PPGM, PGLK, PTRI, PGPI, PADH1, PTEF1 and PGCW14) were obtained with the activity range of 13%–130% of the common promoter PGAP (the promoter of glyceraldehyde-3-phosphate dehydrogenase), among which PPDH and PGCW14 were further verified by biosynthesis of fatty alcohol. Furthermore, the inducible promoters, including ethanol-induced PICL1, rhamnose-induced PLRA3 and PLRA4, and a bidirectional promoter (PMal-PPer) that is strongly induced by sucrose, further expanded the promoter toolbox in O. polymorpha. Finally, a series of hybrid promoters were constructed via engineering upstream activation sequence (UAS), which increased the activity of native promoter PLRA3 by 4.7–10.4 times without obvious leakage expression. Therefore, this study provided a group of constitutive, inducible, and hybrid promoters for metabolic engineering of O. polymorpha, and also a feasible strategy for rationally regulating the promoter strength.
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Affiliation(s)
- Chunxiao Yan
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, PR China.,Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, PR China
| | - Wei Yu
- Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, PR China.,Dalian Key Laboratory of Energy Biotechnology, Dalian Institute of Chemical Physics, CAS, 457 Zhongshan Road, Dalian, 116023, PR China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaoxin Zhai
- Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, PR China.,Dalian Key Laboratory of Energy Biotechnology, Dalian Institute of Chemical Physics, CAS, 457 Zhongshan Road, Dalian, 116023, PR China
| | - Lun Yao
- Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, PR China.,Dalian Key Laboratory of Energy Biotechnology, Dalian Institute of Chemical Physics, CAS, 457 Zhongshan Road, Dalian, 116023, PR China
| | - Xiaoyu Guo
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, PR China
| | - Jiaoqi Gao
- Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, PR China.,CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, PR China.,Dalian Key Laboratory of Energy Biotechnology, Dalian Institute of Chemical Physics, CAS, 457 Zhongshan Road, Dalian, 116023, PR China
| | - Yongjin J Zhou
- Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, PR China.,CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, PR China.,Dalian Key Laboratory of Energy Biotechnology, Dalian Institute of Chemical Physics, CAS, 457 Zhongshan Road, Dalian, 116023, PR China
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Improved Production of Streptomyces sp. FA1 Xylanase in a Dual-Plasmid Pichia pastoris System. Curr Issues Mol Biol 2021; 43:2289-2304. [PMID: 34940135 PMCID: PMC8928940 DOI: 10.3390/cimb43030161] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 12/16/2021] [Accepted: 12/16/2021] [Indexed: 12/18/2022] Open
Abstract
Methanol is considered as a potential hazard in the methanol-induced yeast expression of food-related enzymes. To increase the production efficiency of recombinant proteins in Pichia pastoris without methanol induction, a novel dual-plasmid system was constructed, for the first time, by a combining the strategies of genomic integration and episomal expression. To obtain a high copy number of the target gene, the autonomously replicating sequence derived from Kluyveromyces lactis (PARS) was used to construct episomal vectors carrying the constitutive promoters PGAP and PGCW14. In addition, an integrative vector carrying the PGCW14 promoter was constructed by replacing the PGAP promoter sequence with a partial PGCW14 promoter. Next, using xylanase XynA from Streptomyces sp. FA1 as the model enzyme, recombination strains were transformed with different combinations of integrating and episomal vectors that were constructed to investigate the changes in the protein yield. Results in shake flasks indicated that the highest enzyme yield was achieved when integrated PGAP and episomal PGCW14 were simultaneously transformed into the host strain. Meanwhile, the copy number of xynA increased from 1.14 ± 0.46 to 3.06 ± 0.35. The yield of XynA was successfully increased to 3925 U·mL-1 after 102 h of fermentation in a 3.6 L fermenter, which was 16.7-fold and 2.86-fold of the yields that were previously reported for the constitutive expression and methanol-induced expression of the identical protein, respectively. Furthermore, the high-cell-density fermentation period was shortened from 132 h to 102 h compared to that of methanol-induced system. Since the risk of methanol toxicity is removed, this novel expression system would be suitable for the production of proteins related to the food and pharmaceutical industries.
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Wang J, Li X, Chen H, Lin B, Zhao L. Heterologous Expression and Characterization of a High-Efficiency Chitosanase From Bacillus mojavensis SY1 Suitable for Production of Chitosan Oligosaccharides. Front Microbiol 2021; 12:781138. [PMID: 34912320 PMCID: PMC8667621 DOI: 10.3389/fmicb.2021.781138] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 10/26/2021] [Indexed: 11/13/2022] Open
Abstract
Chitosanase plays an important role in enzymatic production of chitosan oligosaccharides (COSs). The present study describes the gene cloning and high-level expression of a high-efficiency chitosanase from Bacillus mojavensis SY1 (CsnBm). The gene encoding CsnBm was obtained by homologous cloning, ligated to pPICZαA, and transformed into Pichia pastoris X33. A recombinant strain designated X33-C3 with the highest activity was isolated from 120 recombinant colonies. The maximum activity and total protein concentration of recombinant strain X33-C3 were 6,052 U/ml and 3.75 g/l, respectively, which were obtained in fed-batch cultivation in a 50-l bioreactor. The optimal temperature and pH of purified CsnBm were 55°C and 5.5, respectively. Meanwhile, CsnBm was stable from pH 4.0 to 9.0 and 40 to 55°C. The purified CsnBm exhibited high activity toward colloidal chitosan with degrees of deacetylation from 85 to 95%. Furthermore, CsnBm exhibited high efficiency to hydrolyze different concentration of colloidal chitosan to produce COSs. The result of this study not only identifies a high-efficiency chitosanase for preparation of COSs, but also casts some insight into the high-level production of chitosanase in heterologous systems.
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Affiliation(s)
- Jianrong Wang
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang, China.,Hunan Provincial Key Laboratory of Soybean Products Processing and Safety Control, Shaoyang, China
| | - Xiaoming Li
- Bioengineering Research Center, Guangzhou Institute of Advanced Technology, Guangzhou, China
| | - Hao Chen
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang, China.,Hunan Provincial Key Laboratory of Soybean Products Processing and Safety Control, Shaoyang, China
| | - Bilian Lin
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang, China.,Hunan Provincial Key Laboratory of Soybean Products Processing and Safety Control, Shaoyang, China
| | - Liangzhong Zhao
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang, China.,Hunan Provincial Key Laboratory of Soybean Products Processing and Safety Control, Shaoyang, China
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Han M, Wang W, Gong X, Zhou J, Xu C, Li Y. Increased expression of recombinant chitosanase by co-expression of Hac1p in the yeast Pichia pastoris. Protein Pept Lett 2021; 28:1434-1441. [PMID: 34749599 DOI: 10.2174/0929866528666211105111155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/13/2021] [Accepted: 09/20/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Pichia pastoris is one of the most popular eukaryotic hosts for producing heterologous proteins, while increasing secretion of target proteins is still a top priority for their application in industrial fields. Recently, the research effort to enhance protein production therein has focused on up-regulating the unfolded protein response (UPR). OBJECTIVE We evaluated the effects of activated UPR via Hac1p co-expression with the promoter AOX1 (PAOX1) or GAP (PGAP) on expression of recombinant chitosanase (rCBS) in P. pastoris. METHOD The DNA sequence encoding the chitosanase was chemically synthesized and cloned into pPICZαA and the resulted pPICZαA/rCBS was transformed into P. pastoris for expressing rCBS. The P. pastoris HAC1i cDNA was chemically synthesized and cloned into pPIC3.5K to give pPIC3.5K/Hac1p. The HAC1i cDNA was cloned into pGAPZB and then inserted with HIS4 gene from pAO815 to construct the vector pGAPZB/Hac1p/HIS4. For co-expression of Hac1p, the two plasmids pPIC3.5K/Hac1p and pGAPZB/Hac1p/HIS4 were transformed into P. pastoris harboring the CBS gene. The rCBS was assessed based on chitosanase activity and analyzed by SDS-PAGE. The enhanced Kar2p was detected with western blotting to evaluate UPR. RESULTS Hac1p co-expression with PAOX1 enhanced rCBS secretion by 41% at 28°C. Although the level of UPR resulted from Hac1p co-expression with PAOX1 was equivalent to that with PGAP in terms of the quantity of Kar2p (a hallmark of the UPR), substitution of PGAP for PAOX1 further increased rCBS production by 21%. The methanol-utilizing phenotype of P. pastoris did not affect rCBS secretion with co-expression of Hac1p or not. Finally, Hac1p co-expression with PAOX1 or PGAP promoted rCBS secretion from 22 to 30°C and raised the optimum induction temperature. CONCLUSION The study indicated that Hac1p co-expression with PAOX1 or PGAP is an effective strategy to trigger UPR of P. pastoris and a feasible means for improving production of rCBS therein.
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Affiliation(s)
- Minghai Han
- College of Food and Pharmaceutical Engineering, Guizhou Institute of Technology, Guiyang. China
| | - Weixian Wang
- College of Food and Pharmaceutical Engineering, Guizhou Institute of Technology, Guiyang. China
| | - Xun Gong
- College of Food and Pharmaceutical Engineering, Guizhou Institute of Technology, Guiyang. China
| | - Jianli Zhou
- College of Food and Pharmaceutical Engineering, Guizhou Institute of Technology, Guiyang. China
| | - Cunbin Xu
- College of Food and Pharmaceutical Engineering, Guizhou Institute of Technology, Guiyang. China
| | - Yinfeng Li
- College of Food and Pharmaceutical Engineering, Guizhou Institute of Technology, Guiyang. China
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Zhang B, Zhao X, Wang Z, Wang H, Zhou J, Du G, Chen J, Li J. Efficient Secretory Expression and Purification of Food-Grade Porcine Myoglobin in Komagataella phaffii. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:10235-10245. [PMID: 34428899 DOI: 10.1021/acs.jafc.1c04124] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Myoglobin (MG) is one of the eukaryotic heme-binding proteins that is closely associated with the real color and metallic taste of meat and can be used as a color additive in artificial meat alternatives. However, the traditional extraction methods are expensive and time-consuming and the heterologous biosynthesis of MG has never been reported. Herein, we achieved the secretory expression of porcine MG by engineered Komagataella phaffii using the suitable host (X33), signal peptide (α-factor signal peptide), and modified constitutive promoter (G1 promoter). In addition, the fermentation conditions for MG production were optimized at shaking-flask level (BMGY medium with 40 mg/L of hemin, 30 °C) and at fermenter level (30% DO, feeding 150 mg/L of hemin), resulting in the highest titer of 285.42 mg/L MG in fed-batch fermentations. Furthermore, a purification method for food-grade MG was developed, which can obtain 0.22 mol of heme/mol of MG with 88.0% purity and 66.1% recovery rate.
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Affiliation(s)
- Bohan Zhang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Science Center for Future Foods, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Xinrui Zhao
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Science Center for Future Foods, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Ziwei Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Haoze Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Jingwen Zhou
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Science Center for Future Foods, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Guocheng Du
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Science Center for Future Foods, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Jian Chen
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Science Center for Future Foods, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Jianghua Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Science Center for Future Foods, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
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Bioprocess performance analysis of novel methanol-independent promoters for recombinant protein production with Pichia pastoris. Microb Cell Fact 2021; 20:74. [PMID: 33757505 PMCID: PMC7986505 DOI: 10.1186/s12934-021-01564-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 03/12/2021] [Indexed: 11/30/2022] Open
Abstract
Background Pichia pastoris is a powerful and broadly used host for recombinant protein production (RPP), where past bioprocess performance has often been directed with the methanol regulated AOX1 promoter (PAOX1), and the constitutive GAP promoter (PGAP). Since promoters play a crucial role in an expression system and the bioprocess efficiency, innovative alternatives are constantly developed and implemented. Here, a thorough comparative kinetic characterization of two expression systems based on the commercial PDF and UPP promoters (PPDF, PUPP) was first conducted in chemostat cultures. Most promising conditions were subsequently tested in fed-batch cultivations. These new alternatives were compared with the classical strong promoter PGAP, using the Candida antarctica lipase B (CalB) as model protein for expression system performance. Results Both the PPDF and PUPP-based expression systems outperformed similar PGAP-based expression in chemostat cultivations, reaching ninefold higher specific production rates (qp). CALB transcription levels were drastically higher when employing the novel expression systems. This higher expression was also correlated with a marked upregulation of unfolded protein response (UPR) related genes, likely from an increased protein burden in the endoplasmic reticulum (ER). Based on the chemostat results obtained, best culture strategies for both PPDF and PUPP expression systems were also successfully implemented in 15 L fed-batch cultivations where qp and product to biomass yield (YP/X*) values were similar than those obtained in chemostat cultivations. Conclusions As an outcome of the macrokinetic characterization presented, the novel PPDF and PUPP were observed to offer much higher efficiency for CalB production than the widely used PGAP-based methanol-free alternative. Thus, both systems arise as highly productive alternatives for P. pastoris-based RPP bioprocesses. Furthermore, the different expression regulation patterns observed indicate the level of gene expression can be adjusted, or tuned, which is interesting when using Pichia pastoris as a cell factory for different products of interest. Supplementary Information The online version contains supplementary material available at 10.1186/s12934-021-01564-9.
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Strategies for Optimizing the Production of Proteins and Peptides with Multiple Disulfide Bonds. Antibiotics (Basel) 2020; 9:antibiotics9090541. [PMID: 32858882 PMCID: PMC7558204 DOI: 10.3390/antibiotics9090541] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 08/22/2020] [Accepted: 08/25/2020] [Indexed: 02/07/2023] Open
Abstract
Bacteria can produce recombinant proteins quickly and cost effectively. However, their physiological properties limit their use for the production of proteins in their native form, especially polypeptides that are subjected to major post-translational modifications. Proteins that rely on disulfide bridges for their stability are difficult to produce in Escherichia coli. The bacterium offers the least costly, simplest, and fastest method for protein production. However, it is difficult to produce proteins with a very large size. Saccharomyces cerevisiae and Pichia pastoris are the most commonly used yeast species for protein production. At a low expense, yeasts can offer high protein yields, generate proteins with a molecular weight greater than 50 kDa, extract signal sequences, and glycosylate proteins. Both eukaryotic and prokaryotic species maintain reducing conditions in the cytoplasm. Hence, the formation of disulfide bonds is inhibited. These bonds are formed in eukaryotic cells during the export cycle, under the oxidizing conditions of the endoplasmic reticulum. Bacteria do not have an advanced subcellular space, but in the oxidizing periplasm, they exhibit both export systems and enzymatic activities directed at the formation and quality of disulfide bonds. Here, we discuss current techniques used to target eukaryotic and prokaryotic species for the generation of correctly folded proteins with disulfide bonds.
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Zhang C, Ma Y, Miao H, Tang X, Xu B, Wu Q, Mu Y, Huang Z. Transcriptomic Analysis of Pichia pastoris ( Komagataella phaffii) GS115 During Heterologous Protein Production Using a High-Cell-Density Fed-Batch Cultivation Strategy. Front Microbiol 2020; 11:463. [PMID: 32265887 PMCID: PMC7098997 DOI: 10.3389/fmicb.2020.00463] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 03/04/2020] [Indexed: 12/27/2022] Open
Abstract
Pichia pastoris (Komagataella phaffii) is a methylotrophic yeast that is widely used in industry as a host system for heterologous protein expression. Heterologous gene expression is typically facilitated by strongly inducible promoters derived from methanol utilization genes or constitutive glycolytic promoters. However, protein production is usually accomplished by a fed-batch induction process, which is known to negatively affect cell physiology, resulting in limited protein yields and quality. To assess how yields of exogenous proteins can be increased and to further understand the physiological response of P. pastoris to the carbon conversion of glycerol and methanol, as well as the continuous induction of methanol, we analyzed recombinant protein production in a 10,000-L fed-batch culture. Furthermore, we investigated gene expression during the yeast cell culture phase, glycerol feed phase, glycerol-methanol mixture feed (GM) phase, and at different time points following methanol induction using RNA-Seq. We report that the addition of the GM phase may help to alleviate the adverse effects of methanol addition (alone) on P. pastoris cells. Secondly, enhanced upregulation of the mitogen-activated protein kinase (MAPK) signaling pathway was observed in P. pastoris following methanol induction. The MAPK signaling pathway may be related to P. pastoris cell growth and may regulate the alcohol oxidase1 (AOX1) promoter via regulatory factors activated by methanol-mediated stimulation. Thirdly, the unfolded protein response (UPR) and ER-associated degradation (ERAD) pathways were not significantly upregulated during the methanol induction period. These results imply that the presence of unfolded or misfolded phytase protein did not represent a serious problem in our study. Finally, the upregulation of the autophagy pathway during the methanol induction phase may be related to the degradation of damaged peroxisomes but not to the production of phytase. This work describes the metabolic characteristics of P. pastoris during heterologous protein production under high-cell-density fed-batch cultivation. We believe that the results of this study will aid further in-depth studies of P. pastoris heterologous protein expression, regulation, and secretory mechanisms.
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Affiliation(s)
- Chengbo Zhang
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Yunnan Normal University, Kunming, China
| | - Yu Ma
- School of Life Sciences, Yunnan Normal University, Kunming, China
| | - Huabiao Miao
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Yunnan Normal University, Kunming, China
| | - Xianghua Tang
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Yunnan Normal University, Kunming, China
- School of Life Sciences, Yunnan Normal University, Kunming, China
- Key Laboratory of Yunnan for Biomass Energy and Biotechnology of Environment, Yunnan Normal University, Kunming, China
- Key Laboratory of Enzyme Engineering, Yunnan Normal University, Kunming, China
| | - Bo Xu
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Yunnan Normal University, Kunming, China
- School of Life Sciences, Yunnan Normal University, Kunming, China
- Key Laboratory of Yunnan for Biomass Energy and Biotechnology of Environment, Yunnan Normal University, Kunming, China
- Key Laboratory of Enzyme Engineering, Yunnan Normal University, Kunming, China
| | - Qian Wu
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Yunnan Normal University, Kunming, China
- School of Life Sciences, Yunnan Normal University, Kunming, China
- Key Laboratory of Yunnan for Biomass Energy and Biotechnology of Environment, Yunnan Normal University, Kunming, China
- Key Laboratory of Enzyme Engineering, Yunnan Normal University, Kunming, China
| | - Yuelin Mu
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Yunnan Normal University, Kunming, China
- School of Life Sciences, Yunnan Normal University, Kunming, China
- Key Laboratory of Yunnan for Biomass Energy and Biotechnology of Environment, Yunnan Normal University, Kunming, China
- Key Laboratory of Enzyme Engineering, Yunnan Normal University, Kunming, China
| | - Zunxi Huang
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Yunnan Normal University, Kunming, China
- School of Life Sciences, Yunnan Normal University, Kunming, China
- Key Laboratory of Yunnan for Biomass Energy and Biotechnology of Environment, Yunnan Normal University, Kunming, China
- Key Laboratory of Enzyme Engineering, Yunnan Normal University, Kunming, China
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