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Xu R, Han X, Lou Y, Chang M, Kong Y, Gu S, Gao Y, Shang S, Song Z, Song J, Li J. Discovery of Potential Rosin-Based Triazole Antifungal Candidates to Control Valsa mali for Sustainable Crop Protection. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:4630-4638. [PMID: 38407939 DOI: 10.1021/acs.jafc.3c07628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
To investigate the potential application value of dehydroabietic acid, 27 novel dehydroabietyl-1,2,4-triazole-5-thioether-based derivatives were designed and characterized by IR, 1H NMR, 13C NMR, and LC-MS. Their antifungal activities were evaluated against five plant fungi, namely, Valsa mali, Colletotrichum orbiculare, Fusarium graminearum, Sclerotinia sclerotiorum, and Gaeumannomyces graminis; the results showed that compound 5h-1 (Co. 5h-1) exhibited a considerable inhibitory effect against V. mali. Moreover, in vivo experiments indicated that Co. 5h-1 had a certain protective effect on apple branches. The preliminary structure-activity relationship analysis suggested that the electron-withdrawing group on the benzyl group was significantly better than that of other substituent derivatives. Through electron microscopy analysis, it was found that Co. 5h-1 hindered the growth of mycelia, damaged their cell structure, and caused the large accumulation of reactive oxygen species (ROS). Preliminary research on the mode of action indicated that Co. 5h-1 could affect the activity of CAT by increasing the α-helix (0.790%), decreasing the β-sheet (0.170%), which led to the accumulation of ROS. In addition, Co. 5h-1 also affected the activity of CYP51, hindered the biosynthesis of ergosterol, and increased cell membrane permeability. Overall, this above research proposed that Co. 5h-1 can be a novel leading structure for development of a fungicide agent.
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Affiliation(s)
- Renle Xu
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Xu Han
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Yuhang Lou
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Meiyue Chang
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Yue Kong
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Shihao Gu
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Yanqing Gao
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Shibin Shang
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, Jiangsu 210042, People's Republic of China
| | - Zhanqian Song
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, Jiangsu 210042, People's Republic of China
| | - Jie Song
- Department of Chemistry and Biochemistry, University of Michigan-Flint, Flint, Michigan 48502, United States
| | - Jian Li
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
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Tahara N, Tachibana I, Takeo K, Yamashita S, Shimada A, Hashimoto M, Ohno S, Yokogawa T, Nakagawa T, Suzuki F, Ebihara A. Boosting Auto-Induction of Recombinant Proteins in Escherichia coli with Glucose and Lactose Additives. Protein Pept Lett 2021; 28:1180-1190. [PMID: 34353248 PMCID: PMC8811614 DOI: 10.2174/0929866528666210805120715] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 05/25/2021] [Accepted: 05/27/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Auto-induction is a convenient way to produce recombinant proteins without inducer addition using lac operon-controlled Escherichia coli expression systems. Auto-induction can occur unintentionally using a complex culture medium prepared by mixing culture substrates. The differences in culture substrates sometimes lead to variations in the induction level. OBJECTIVES In this study, we investigated the feasibility of using glucose and lactose as boosters of auto-induction with a complex culture medium. METHODS First, auto-induction levels were assessed by quantifying recombinant GFPuv expression under the control of the T7 lac promoter. Effectiveness of the additive-containing medium was examined using ovine angiotensinogen (tac promoter-based expression) and Thermus thermophilus manganese-catalase (T7 lac promoter-based expression). RESULTS Auto-induced GFPuv expression was observed with the enzymatic protein digest Polypepton, but not with another digest tryptone. Regardless of the type of protein digest, supplementing Terrific Broth medium with glucose (at a final concentration of 2.9 g/L) and lactose (at a final concentration of 7.6 g/L) was successful in obtaining an induction level similar to that achieved with a commercially available auto-induction medium. The two recombinant proteins were produced in milligram quantity of purified protein per liter of culture. CONCLUSION The medium composition shown in this study would be practically useful for attaining reliable auto-induction for E. coli-based recombinant protein production.
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Affiliation(s)
- Nariyasu Tahara
- Graduate School of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Itaru Tachibana
- Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Kazuyo Takeo
- Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Shinji Yamashita
- United Graduate School of Agricultural Science, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Atsuhiro Shimada
- Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Misuzu Hashimoto
- Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Satoshi Ohno
- Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Takashi Yokogawa
- Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Tsutomu Nakagawa
- Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Fumiaki Suzuki
- Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Akio Ebihara
- Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
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Palanikumar I, Katla S, Tahara N, Yui M, Zhang R, Ebihara A, Sivaprakasam S. Heterologous expression, purification, and functional characterization of recombinant ovine angiotensinogen in the methylotrophic yeast Pichia pastoris. Biotechnol Prog 2019; 35:e2866. [PMID: 31187608 DOI: 10.1002/btpr.2866] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 05/22/2019] [Accepted: 06/04/2019] [Indexed: 12/26/2022]
Abstract
Angiotensinogen (AGT), a glycosylated plasma noninhibitory serpin, serves as a precursor for angiotensin peptides which regulate blood pressure and electrolyte balance. AGT is specifically cleaved by renin to produce angiotensin-I, the first product of the angiotensin-processing cascade. Ovine angiotensinogen (oAGT) is considered an effective substrate for human renin and consequently finds application in clinical renin assays. In this study, oAGT was cloned into the genome of Pichia pastoris and expressed under the control of alcohol oxidase (AOX1) promoter for high-level production. Compared to the shake flask study, the high cell density cultivation in bioreactor resulted in multifold increase in oAGT titer (420 ± 9.26 mg/L), which is its highest reported titer to date. We purified recombinant oAGT to homogeneity using two chromatography steps. The characterization studies revealed oAGT underwent a two-state transition during thermal denaturation process as assessed by differential scanning fluorimetry, and the melting temperature (Tm ) of the purified oAGT from P. pastoris was 48.3°C. Renin reactivity with recombinant oAGT from P. pastoris (0.51 nM angiotensin-I/min) was slightly lower than the renin reactivity for recombinant oAGT from Escherichia coli (0.67 nM angiotensin-I/min), possibly because of its mannosylated N-glycan content. Enhanced production of functionally active recombinant oAGT using P. pastoris expression system reported in this study envisage the effective utilization of oAGT in clinical studies related to renin in near future.
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Affiliation(s)
| | - Srikanth Katla
- BioPAT Laboratory, Indian Institute of Technology Guwahati, Guwahati, Assam, India
| | - Nariyasu Tahara
- Graduate School of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - Midori Yui
- Graduate School of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - Rui Zhang
- Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - Akio Ebihara
- Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan.,Center for Highly Advanced Integration of Nano and Life Sciences, Gifu University (G-CHAIN), Gifu, Japan
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Akther J, Nabi AN, Ohno S, Yokogawa T, Nakagawa T, Suzuki F, Ebihara A. Establishing a novel assay system for measuring renin concentration using cost effective recombinant ovine angiotensinogen. Heliyon 2019; 5:e01409. [PMID: 30997427 PMCID: PMC6451169 DOI: 10.1016/j.heliyon.2019.e01409] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Revised: 02/10/2019] [Accepted: 03/20/2019] [Indexed: 11/17/2022] Open
Abstract
Background Plasma renin can predict future cardiovascular events as well as the prevalence of chronic renal disease in hypertensive subjects. Ovine angiotensinogen (oANG) is a better substrate for measuring renin concentration through activity assay. Recombinant oANG expressed in Escherichia coli cells can be utilized as the substrate while measuring plasma renin. We aim to establish an immunoassay for measuring renin concentration at picomolar level using recombinant oANG. Material and methods Recombinant oANG was expressed in E. coli cells and purified to homogeneity. Various concentrations (0–1.5 pM) of recombinant human renin standard were prepared and incubated with recombinant oANG. Renin activity was determined by angiotensin-I specific enzyme-linked immunosorbent assay. Results About 4.5 mg of purified recombinant oANG was obtained from 0.5 L of E. coli culture. The Michaelis constant and turnover number of human renin with recombinant oANG were 0.16 μM and 0.51 s−1, respectively. A linear relationship was obtained when renin activity was plotted as a function of renin concentration using recombinant oANG as the renin substrate. Picomolar amounts of renin can be measured from known renin activity using this method. Conclusion This study established a novel assay system for measuring renin at picomolar level using cost effective recombinant oANG.
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Affiliation(s)
- Jobaida Akther
- United Graduate School of Agricultural Science, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
- Laboratory of Population Genetics, Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka, 1000, Bangladesh
| | - A.H.M. Nurun Nabi
- Laboratory of Population Genetics, Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka, 1000, Bangladesh
| | - Satoshi Ohno
- Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Takashi Yokogawa
- Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
- Center for Highly Advanced Integration of Nano and Life Sciences, Gifu University (G-CHAIN), 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Tsutomu Nakagawa
- Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Fumiaki Suzuki
- Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Akio Ebihara
- Center for Highly Advanced Integration of Nano and Life Sciences, Gifu University (G-CHAIN), 1-1 Yanagido, Gifu, 501-1193, Japan
- Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
- Corresponding author.
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