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Jiang C, Miao G, Li J, Zhang Z, Li J, Zhu S, Zhang J, Zhou X. Identification and Characterization of Two Novel Extracellular β-Glucanases from Chaetomium globosum against Fusarium sporotrichioides. Appl Biochem Biotechnol 2023:10.1007/s12010-023-04698-1. [PMID: 37642922 DOI: 10.1007/s12010-023-04698-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/16/2023] [Indexed: 08/31/2023]
Abstract
Chaetomium globosum can inhibit the growth of fusarium by means of their extracellular proteins. Two novel β-glucanases, designated Cgglu17A and Cgglu16B, were separated from the supernatant of C. globosum W7 and verified to have the ability to hydrolyze cell walls of Fusarium sporotrichioides MLS-19. Cgglu17A (397 amino acids) was classified as glycoside hydrolase family 17 while Cgglu16B belongs to the family16 (284 amino acids). Recombinant protein Cgglu17A was successfully expressed in Escherichia coli, and the enzymes were purified by affinity chromatography. Maximum activity of Cgglu17A appeared at the pH 5.5 and temperature 50 °C, but Cgglu16B shows the maximum activity at the pH 5.0 and temperature 50 °C. Most of heavy metal ions had inhibition effect on the two enzymes, but Cgglu17A and Cgglu16B were respectively activated by Ba2+ and Mn2+. Cgglu17A exhibited high substrate specificity, almost only catalyzing the cleavage of β-1,3-glycosidic bond, in various polysaccharose, to liberate glucose. However, Cgglu16B showed high catalytic activities to both β-1,3-glycosidic and β-1,3-1,4-glycosidic bonds. Cgglu17A was an exo-glucanase, but Cgglu16B was an endo-glucanase based on hydrolytic properties assay. Both of two enzymes showed potential antifungal activity, and the synergistic effect was observed in the germination experiment of pathogenic fungus. In conclusion, Cgglu17A (exo-1,3-β-glucanase) and Cgglu16B (endo-1,3(4)-β-glucanase) were confirmed to play a key role in the process of C. globosum controlling fusarium and have potential application value on industry and agriculture for the first time.
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Affiliation(s)
- Cheng Jiang
- School of Biological Engineering, Huainan Normal University, Huainan, People's Republic of China.
- Key Laboratory of Bioresource and Environmental Biotechnology of Anhui Higher Education Institutes, Huainan Normal University, Huainan, People's Republic of China.
- School of Biological Engineering & Institute of Digital Ecology and Health, Huainan Normal University, Huainan, People's Republic of China.
| | - Guopeng Miao
- School of Biological Engineering, Huainan Normal University, Huainan, People's Republic of China
- Key Laboratory of Bioresource and Environmental Biotechnology of Anhui Higher Education Institutes, Huainan Normal University, Huainan, People's Republic of China
- School of Biological Engineering & Institute of Digital Ecology and Health, Huainan Normal University, Huainan, People's Republic of China
| | - Jialu Li
- School of Biological Engineering, Huainan Normal University, Huainan, People's Republic of China
- Lanzhou Institute of Biological Products, Lanzhou, People's Republic of China
| | - Ziyu Zhang
- School of Biological Engineering, Huainan Normal University, Huainan, People's Republic of China
| | - Jiamin Li
- School of Biological Engineering, Huainan Normal University, Huainan, People's Republic of China
| | - Shuyan Zhu
- School of Biological Engineering, Huainan Normal University, Huainan, People's Republic of China
| | - Jinhu Zhang
- School of Biological Engineering, Huainan Normal University, Huainan, People's Republic of China
| | - Xingyu Zhou
- School of Biological Engineering, Huainan Normal University, Huainan, People's Republic of China
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