1
|
Pang B, Song M, Yang J, Mo H, Wang K, Chen X, Huang Y, Gu R, Guan C. Efficient production of a highly active lysozyme from European flat oyster Ostrea edulis. J Biotechnol 2024; 391:40-49. [PMID: 38848819 DOI: 10.1016/j.jbiotec.2024.05.011] [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] [Received: 03/25/2024] [Revised: 05/21/2024] [Accepted: 05/29/2024] [Indexed: 06/09/2024]
Abstract
Lysozyme, an antimicrobial agent, is extensively employed in the food and healthcare sectors to facilitate the breakdown of peptidoglycan. However, the methods to improve its catalytic activity and secretory expression still need to be studied. In the present study, twelve lysozymes from different origins were heterologously expressed using the Komagataella phaffii expression system. Among them, the lysozyme from the European flat oyster Ostrea edulis (oeLYZ) showed the highest activity. Via a semi-rational approach to reduce the structural free energy, the double mutant Y15A/S39R (oeLYZdm) with the catalytic activity 1.8-fold greater than that of the wild type was generated. Subsequently, different N-terminal fusion tags were employed to enhance oeLYZdm expression. The fusion with peptide tag 6×Glu resulted in a remarkable increase in the recombinant oeLYZdm expression, from 2.81 × 103 U mL-1 to 2.11 × 104 U mL-1 in shake flask culture, and eventually reaching 2.05 × 105 U mL-1 in a 3-L fermenter. The work produced the greatest amount of heterologous oeLYZ expression in microbial systems that are known to exist. Reducing the structural free energy and employing the N-terminal fusion tags are effective strategies to improve the catalytic activity and secretory expression of lysozyme.
Collapse
Affiliation(s)
- Bo Pang
- School of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China; Key Lab of Dairy Biotechnology and Safety Control, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Manxi Song
- School of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China; Key Lab of Dairy Biotechnology and Safety Control, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Jiahao Yang
- School of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China; Key Lab of Dairy Biotechnology and Safety Control, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Haobin Mo
- School of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China; Key Lab of Dairy Biotechnology and Safety Control, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Kai Wang
- School of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China; Key Lab of Dairy Biotechnology and Safety Control, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Xia Chen
- School of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China; Key Lab of Dairy Biotechnology and Safety Control, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Yujun Huang
- School of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China; Key Lab of Dairy Biotechnology and Safety Control, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Ruixia Gu
- School of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China; Key Lab of Dairy Biotechnology and Safety Control, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Chengran Guan
- School of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China; Key Lab of Dairy Biotechnology and Safety Control, Yangzhou University, Yangzhou, Jiangsu 225127, China.
| |
Collapse
|
2
|
Ling XD, Lv J, Chen FJ, Qin XT, Wu MS, Bai F, Luo HQ. Expression characteristics and in vitro antibacterial properties of C-type lysozyme in crucian carp infected with Aeromonas salmonicida. Heliyon 2024; 10:e24044. [PMID: 38230230 PMCID: PMC10789626 DOI: 10.1016/j.heliyon.2024.e24044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 12/26/2023] [Accepted: 01/02/2024] [Indexed: 01/18/2024] Open
Abstract
Aeromonas salmonicida is an ancient fish pathogen. Lysozymes are important molecules in the innate immune system that fight bacterial infections. The expression characteristics of C-type lysozyme in crucian carp infected with A. salmonicida and its antibacterial effect against A. salmonicida had not been investigated. Thus, we used bioinformatics to analyze the gene and protein characteristics of C-type lysozymes in crucian carp. Changes in C-type lysozyme expression before and after crucian carp infection with A. salmonicida were detected, and the in vitro antibacterial effect of recombinant carp C-type lysozyme on A. salmonicida was validated. The results showed that the coding DNA sequence region of the lysozyme gene sequence was 438 bp long, encoding 145 amino acids and containing two conserved catalytic sites: Glu53 and Asp69. Phylogenetic analysis revealed that crucian carp C-type lysozymes clustered with Cyprinus carpio lysozyme C. After crucian carp were infected with A. salmonicida, the gene and protein expression of C-type lysozymes in the liver, spleen, kidney, and hindgut were significantly upregulated, with the liver showing the highest upregulation that was 15 times higher than that in the uninfected group. In addition, recombinant C-type lysozyme exhibited significant antibacterial activity against A. salmonicida, with an average inhibition zone radius of 0.92 cm when using 40 μg recombinant lysozyme. In conclusion, this study reveals the important role of C-type lysozymes in the innate immune response of crucian carp and provides a theoretical basis for preventing crucian carp infection with A. salmonicida.
Collapse
Affiliation(s)
- Xiao-dong Ling
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
| | - Jianshu Lv
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
| | - Fu-ju Chen
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
| | - Xiao-tong Qin
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
| | - Mei-si Wu
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
| | - Feng Bai
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
| | - Hui-qiong Luo
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
| |
Collapse
|
3
|
Cui L, Huang H, Zhang H, Wang X, Qin X, Tu T, Zhang J, Su X, Yu H, Bai Y, Luo H, Yao B, Wang Y. Recombinant expression of hen egg white lysozyme with the assistance of xylanase fusion partner in Pichia pastoris. Bioengineered 2022; 13:13860-13871. [PMID: 35726822 PMCID: PMC9275996 DOI: 10.1080/21655979.2022.2084496] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
Due to its bacteriolytic activity, hen egg white lysozyme (HEWL) is widely used in the feed, food, and pharmaceutical industries. However, its application is hindered by low protein expression levels in microbial expression systems. In this work, a novel fusion protein expression strategy was proposed for increasing the expression level of HEWL. First, HEWL, fused with a highly expressed fusion protein partner xylanase XynCDBFV, is expressed in Pichia pastoris. Secondly, a linker including endogenous protease cleavage sites was introduced between two fusion proteins in order to separate them directly during the secretion process. Finally, the results show that the supernatant of XynCDBFV-HEWL has a higher HEWL expression level and activity compared with HEWL only. It should be noted that the expression of HEWL reaches to about 3.5 g/L, and the activity of HEWL against Micrococcus lysodeikticus reaches to 1.50 × 105 U/mL in a fed-batch fermentation, which is currently the highest level of recombinant expression of an egg white-derived lysozyme. Taken together, we acquired bioactive HEWL for large-scale recombinant production in Pichia pastoris using a novel fusion protein expression strategy, which could then be used for a variety of applications.
Collapse
Affiliation(s)
- Lin Cui
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P.R.China
| | - Huoqing Huang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P.R.China
| | - Honglian Zhang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P.R.China
| | - Xiaolu Wang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P.R.China
| | - Xing Qin
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P.R.China
| | - Tao Tu
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P.R.China
| | - Jie Zhang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P.R.China
| | - Xiaoyun Su
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P.R.China
| | - Huimin Yu
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P.R.China
| | - Yingguo Bai
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P.R.China
| | - Huiying Luo
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P.R.China
| | - Bin Yao
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P.R.China
| | - Yuan Wang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P.R.China
| |
Collapse
|
4
|
Song Q, Xiao Y, Xiao Z, Liu T, Li J, Li P, Han F. Lysozymes in Fish. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:15039-15051. [PMID: 34890178 DOI: 10.1021/acs.jafc.1c06676] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In recent years, the deterioration of the aquaculture ecological environment has led to a high incidence of fish diseases. Lysozymes, important antimicrobial enzymes, play an important role in the innate immune system of fish. The studies of fish lysozymes benefit the control of fish infections caused by pathogens. In this review, we reviewed recent progress in fish lysozymes, including their classification, structural characteristics, biological functions and mechanisms, tissue distributions, and properties of their recombinant proteins, which will help us to systematically understand the fish lysozymes and facilitate their applications in the fields of food and agriculture.
Collapse
Affiliation(s)
- Qing Song
- Ningbo Institute of Northwestern Polytechnical University, Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE), Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Yao Xiao
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Fisheries College, Jimei University, Xiamen, Fujian 361021, People's Republic of China
| | - Zihan Xiao
- Ningbo Institute of Northwestern Polytechnical University, Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE), Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Tong Liu
- Sichuan Tengli Agri-Tech Company, Limited, Deyang, Sichuan 618200, People's Republic of China
| | - Jiacheng Li
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Fisheries College, Jimei University, Xiamen, Fujian 361021, People's Republic of China
| | - Peng Li
- Ningbo Institute of Northwestern Polytechnical University, Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE), Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Fang Han
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Fisheries College, Jimei University, Xiamen, Fujian 361021, People's Republic of China
| |
Collapse
|
5
|
Yu L, Feng Y, Zheng S, Li J, Liu R, Jin D. Cloning and characterization of a novel DNase gene from Trichogramma pretiosum. Protein Expr Purif 2021; 185:105896. [PMID: 33945845 DOI: 10.1016/j.pep.2021.105896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 04/26/2021] [Accepted: 04/27/2021] [Indexed: 10/21/2022]
Abstract
DNase is a powerful tool for a series of molecular biology applications. Developing a strategy for large-scale production of DNase with high purity and activity is critical for scientific research. In this study, a previously uncharacterized gene with nuclease activity was found in Trichogramma pretiosum genome. Pichia pastoris GS115 was preferred as the host to overcome the issues related to prokaryotic expression. Under the optimal conditions, the activity of T. pretiosum DNase (Tp-DNase) reached 1940 U/mL of culture supernatant in fed-batch fermentation. Using ion-exchange chromatography and adsorption chromatography, Tp-DNase was produced with a purity of >99% and molecular weight of 45 kDa. In vitro DNA degradation experiments showed that Tp-DNase could effectively degrade dsDNA, and its activity was slightly higher than that of bovine pancreas DNase I under the same conditions. Moreover, Tp-DNase can be used to eliminate nucleic acid contamination and improve the accuracy of nucleic acid detection.
Collapse
Affiliation(s)
- Lijuan Yu
- School of Life Sciences, Nantong University, Nantong, 226019, China
| | - Yi Feng
- School of Life Sciences, Nantong University, Nantong, 226019, China
| | - Suxiang Zheng
- School of Life Sciences, Nantong University, Nantong, 226019, China
| | - Jie Li
- School of Life Sciences, Nantong University, Nantong, 226019, China
| | - Ruocen Liu
- School of Life Sciences, Nantong University, Nantong, 226019, China
| | - Dayong Jin
- School of Life Sciences, Nantong University, Nantong, 226019, China.
| |
Collapse
|
6
|
Expression of Pleurotus ostreatus Laccase Gene in Pichia pastoris and Its Degradation of Corn Stover Lignin. Microorganisms 2020; 8:microorganisms8040601. [PMID: 32326242 PMCID: PMC7232166 DOI: 10.3390/microorganisms8040601] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 04/16/2020] [Accepted: 04/19/2020] [Indexed: 11/17/2022] Open
Abstract
Pleurotus ostreatus is a species of white-rot fungi that effectively degrades lignin. In this study, we aimed to efficiently express the lac-2 gene of Pleurotus ostreatus in the Pichia pastoris X33 yeast strain. The enzymatic properties of recombinant yeast were determined, and its ability to degrade corn stover lignin was determined. The results showed the optimum pH values of recombinant laccase for 2,2’-Azinobis-3-ethylbenzothiazoline-6-sulfonic acid, 2,6-dimethoxyphenol, and 2-methoxyphenol were 3.0, 3.0, and 3.5, respectively. The optimum reaction temperature was 50 °C, and it had good thermal stability and acid and alkali resistance. The degradation rate of lignin in corn stover by recombinant laccase was 18.36%, and the native Pleurotus ostreatus degradation rate was 14.05%, the difference between them is significant (p < 0.05). This experiment lays a foundation for the study of the degradation mechanism of lignin by laccase.
Collapse
|