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Li R, Tan X, Li S, Jin Y, Li S, Li S, Takala TM, Saris PEJ. Cloning, Expression, Characterization, and Tissue Distribution of Cystatin C from Silver Carp ( Hypophthalmichthys molitrix). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:5144-5154. [PMID: 33881846 DOI: 10.1021/acs.jafc.1c00345] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Cystatins are proteins, which inhibit cysteine proteases, such as papain. In this study, the 336-bp cystatin C gene (family II, HmCysC) of silver carp (Hypophthalmichthys molitrix) was cloned and expressed in Escherichia coli BL21 (DE3). HmCysC encodes the mature peptide of cystatin C (HmCystatin C), with 111 amino acids. A typical QXXXG motif was found in HmCystatin C and it formed a cluster with Cyprinus carpio and Danio rerio cystatin C in the phylogenetic tree. Quantitative real-time polymerase chain reaction analysis indicated that HmCysC was transcribed at different levels in five tested tissues of silver carp. Following purification with Ni2+- nitrilotriacetic acid agarose affinity chromatography, HmCystatin C displayed a molecular weight of 20 kDa in sodium dodecyl sulfate polyacrylamide gel electrophoresis. Purified HmCystatin C had strong inhibitory effects toward the proteolytic activity of papain. Immunochemical staining with anti-HmCystatin C antibody showed that HmCystatin C was widely distributed in silver carp tissues. These results collectively demonstrated the properties of HmCystatin C, providing information for further studies of cystatins from fish organisms.
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Affiliation(s)
- Ran Li
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan Province 625014, China
- Department of Microbiology, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki 00014, Finland
| | - Xiaoqian Tan
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan Province 625014, China
| | - Shuhong Li
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan Province 625014, China
| | - Yu Jin
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan Province 625014, China
| | - Song Li
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan Province 625014, China
| | - Shulei Li
- Department of Histology and Embryology, College of Basic Medical Sciences, Norman Bethune Health Science Center, Jilin University, Changchun, Jilin Province 130021, China
| | - Timo M Takala
- Department of Microbiology, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki 00014, Finland
| | - Per E J Saris
- Department of Microbiology, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki 00014, Finland
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Zhang F, Yang Y, Gao C, Yao Y, Xia R, Hu J, Ran C, Zhang Z, Zhou Z. Bioinformatics analysis and characterization of a secretory cystatin from Thelohanellus kitauei. AMB Express 2020; 10:116. [PMID: 32577834 PMCID: PMC7311561 DOI: 10.1186/s13568-020-01052-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 06/15/2020] [Indexed: 01/17/2023] Open
Abstract
Thelohanellus kitauei, is a member of obligate parasitic myxozoans, which causes intestinal giant-cystic disease of common carp (Cyprinus carpio) and has resulted in significant economic losses in carp farms. Cystatin secreted by parasites can regulate the immune response of host to facilitate parasite's survival. In this study, the secretory TK-cystatin gene, encoding a protein of 120 amino acid residues (13.65 kDa), was cloned from T. kitauei genome. Phylogenetic analysis showed that TK-cystatin gene is closely related to the cystatin-A from Hydra vulgaris. Multiple sequence alignment revealed that TK-cystatin had three conserved motifs: N-terminal G19G20, Q73VVAG77, and C-terminal L102P103. Molecular docking between TK-cystatin and three cysteine proteases showed a lower binding energy (- 13 KJ/mol) with cathepsin L whereas a higher binding energy (- 8.6 KJ/mol) with cathepsin B. TK-cystatin gene was expressed in Escherichia coli. Activity assays revealed that TK-cystatin has stronger inhibitory activity on endopeptidases (papain and cathepsin L) and weaker inhibitory activity on exopeptidase (cathepsin B). TK-cystatin was stable under the condition of acidity or alkalinity or below 57 °C. This study laid a foundation for the design and development of the anti-T. kitauei vaccine in carp culture in the future.
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Affiliation(s)
- Fengli Zhang
- Sino-Norway Fish Gastrointestinal Microbiota Joint Lab, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Yalin Yang
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
| | - Chenchen Gao
- Sino-Norway Fish Gastrointestinal Microbiota Joint Lab, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Yuanyuan Yao
- Sino-Norway Fish Gastrointestinal Microbiota Joint Lab, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Rui Xia
- Sino-Norway Fish Gastrointestinal Microbiota Joint Lab, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Juan Hu
- Sino-Norway Fish Gastrointestinal Microbiota Joint Lab, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Chao Ran
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Zhen Zhang
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Zhigang Zhou
- Sino-Norway Fish Gastrointestinal Microbiota Joint Lab, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
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Li DK, Lin H, Kim SM. Purification and characterization of a cysteine protease inhibitor from chum salmon (Oncorhynchus keta) plasma. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:106-111. [PMID: 18072739 DOI: 10.1021/jf0723662] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A cysteine protease inhibitor (CPI) in chum salmon ( Oncorhynchus keta) plasma (CSP) was detected after performing inhibitory activity staining against papain under nonreducing condition. The CPI was purified from CSP by affinity chromatography with a yield and purification ratio of 0.94% and 30.36-fold, respectively. CSP CPI had a molecular mass of 70 kDa based on the results of SDS-PAGE and Sephacryl S-100 gel filtration. CSP CPI was a glycoprotein based on the periodic acid-Schiff (PAS) staining of the SDS-PAGE gel and classified as a kininogen. CSP CPI was stable in the pH range of 6.0-9.0 with maximal stability at pH 7.0. CSP CPI presented thermal stability at temperatures below 50 degrees C and exhibited maximal activity at temperatures of 20-40 degrees C. CSP CPI was determined to be a noncompetitive inhibitor against papain, with an inhibitor constant (Ki) of 105 nM.
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Affiliation(s)
- De Kun Li
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
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Li DK, Lin H, Kim SM. Application of recombinant chum salmon cystatin to Alaska pollock (Theragra chalcogramma) surimi to prevent gel weakening. J Food Sci 2007; 72:C294-9. [PMID: 17995718 DOI: 10.1111/j.1750-3841.2007.00393.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Recombinant chum salmon cystatin (RC) expressed in Saccharomyces cerevisiae was purified by His-select nickel affinity chromatography. The specific inhibitory activities of RC against papain and cathepsin L were 7.45 and 10.24 U/mg, respectively. RC was stable over pH 5.0 to 7.0 and at temperature below 65 degrees C. RC was used to prevent the gel weakening of Alaska pollock surimi. RC at 100 microg/g showed the highest inhibitory activity against the autolysis of surimi based on the analysis of TCA-soluble peptides. As the concentration of RC increased, both the breaking force and deformation of modori gel greatly increased (P < 0.05). The addition of RC resulted in less expressible drip, which coincided with the increase of whiteness. More myosin heavy chain (MHC) was retained as the addition of RC increased. Therefore, RC could prevent the degradation of proteins in Alaska pollock surimi and was better than egg white (EW). Thus, RC could be applied to Alaska pollock surimi to prevent gel weakening and RC at 100 microg/g was the optimal concentration.
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Affiliation(s)
- D K Li
- College of Food Science and Engineering, Ocean Univ. of China, Qingdao 266003, China
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