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Zhang L, Rao W, Muhayimana S, Zhang X, Xu J, Xiao C, Huang Q. Purification and biochemical characterization of a novel transglutaminase from Mythimna separata larvae (Noctuidae, Lepidoptera). J Biotechnol 2017; 265:1-7. [PMID: 29097276 DOI: 10.1016/j.jbiotec.2017.10.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 10/23/2017] [Accepted: 10/30/2017] [Indexed: 10/18/2022]
Abstract
A novel transglutaminase (MsTGase) from Mythimna separata larvae was separated and purified; its biochemical property and enzymatic catalytic activities were investigated. MsTGase was obtained chromatographically by the precipitation of Sephadex G-100 gel and DEAE-Cellulose-52 ion-exchange column with 48-fold purification and a reproducible yield of approximately 12%. Molecular weight of the MsTGase was 63.5 KDa and its N-terminal amino acid sequence was GKIEEG-LVI. Michaelis constant of the MsTGase for the substrate N-CBZ-Gln-Gly was 12.83mM with a Vmax of 7.99U/mL. Optimum conditions for MsTGase activity were at 42°C and pH7.5. The enzyme didn't possess metal ion at its catalytic active site; its activity could be significantly inhibited by Mg2+, but activated by Ca2+. Chlorpyrifos and spinosad showed a strong potential to increase MsTGase activity, supporting the view that MsTGase was a novel target. Moreover, the formation of intermolecular cross-links of casein and bovine serum albumin polymerized by MsTGase in the presence of DTT was observed. These findings pave the way for future studies on the physiological role of MsTGase and the potential impact of its regulation on MsTGase-associated pest management.
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Affiliation(s)
- Lei Zhang
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Wenbing Rao
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Solange Muhayimana
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Xianfei Zhang
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Jiuyong Xu
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Ciying Xiao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Qingchun Huang
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China.
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Shang M, Xie Z, Tang Z, He L, Wang X, Wang C, Wu Y, Li Y, Zhao L, Lv Z, Wu Z, Huang Y, Yu X, Li X. Expression of Clonorchis sinensis GIIIsPLA 2 protein in baculovirus-infected insect cells and its overexpression facilitating epithelial-mesenchymal transition in Huh7 cells via AKT pathway. Parasitol Res 2017; 116:1307-1316. [PMID: 28220242 DOI: 10.1007/s00436-017-5409-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 02/12/2017] [Indexed: 12/29/2022]
Abstract
Although prior studies confirmed that group III secretory phospholipase A2 of Clonorchis sinensis (CsGIIIsPLA2) had stimulating effect on liver fibrosis by binding to LX-2 cells, large-scale expression of recombinant protein and its function in the progression of hepatoma are worth exploring. Because of high productivity and low lipopolysaccharides (LPS) in the Sf9-baculovirus expression system, we firstly used this system to express the coding region of CsGIIIsPLA2. The molecular weight of recombinant CsGIIIsPLA2 protein was about 34 kDa. Further investigation showed that most of the recombinant protein presented intracellular expression in Sf9 insect cell nucleus and could be detected only into cell debris, which made the protein purification and further functional study difficult. Therefore, to study the role of CsGIIIsPLA2 in hepatocellular carcinoma (HCC) progression, CsGIIIsPLA2 overexpression Huh7 cell model was applied. Cell proliferation, migration, and the expression level of epithelial-mesenchymal transition (EMT)-related molecules (E-cadherin, N-cadherin, α-catenin, Vimentin, p300, Snail, and Slug) along with possible mechanism were measured. The results indicated that CsGIIIsPLA2 overexpression not only inhibited cell proliferation and promoted migration and EMT but also enhanced the phosphorylation of AKT in HCC cells. In conclusion, this study supported that CsGIIIsPLA2 overexpression suppressed cell proliferation and induced EMT through the AKT pathway.
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Affiliation(s)
- Mei Shang
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China.,Key Laboratory for Tropical Diseases Control, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China
| | - Zhizhi Xie
- Department of Clinical Laboratory, Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China
| | - Zeli Tang
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China.,Key Laboratory for Tropical Diseases Control, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China
| | - Lei He
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China.,Key Laboratory for Tropical Diseases Control, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China.,Department of Clinical Laboratory, Guangzhou Red Cross Hospital, Medical College, Jinan University, Guangzhou, 510060, People's Republic of China
| | - Xiaoyun Wang
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China.,Key Laboratory for Tropical Diseases Control, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China
| | - Caiqin Wang
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China.,Key Laboratory for Tropical Diseases Control, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China
| | - Yinjuan Wu
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China.,Key Laboratory for Tropical Diseases Control, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China
| | - Ye Li
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China.,Key Laboratory for Tropical Diseases Control, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China
| | - Lu Zhao
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China.,Key Laboratory for Tropical Diseases Control, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China
| | - Zhiyue Lv
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China.,Key Laboratory for Tropical Diseases Control, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China
| | - Zhongdao Wu
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China.,Key Laboratory for Tropical Diseases Control, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China
| | - Yan Huang
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China.,Key Laboratory for Tropical Diseases Control, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China
| | - Xinbing Yu
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China.,Key Laboratory for Tropical Diseases Control, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China
| | - Xuerong Li
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China. .,Key Laboratory for Tropical Diseases Control, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China.
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