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Wang Y, Xie T, Ma C, Zhao Y, Li J, Li Z, Ye X. Biochemical characterization and antifungal activity of a recombinant β-1,3-glucanase FlGluA from Flavobacterium sp. NAU1659. Protein Expr Purif 2024; 224:106563. [PMID: 39122061 DOI: 10.1016/j.pep.2024.106563] [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: 04/30/2024] [Revised: 07/07/2024] [Accepted: 08/01/2024] [Indexed: 08/12/2024]
Abstract
β-1,3-glucanases can degrade β-1,3-glucoside bonds in β-glucan which is the main cell-wall component of most of fungi, and have the crucial application potential in plant protection and food processing. Herein, a β-1,3-glucanase FlGluA from Flavobacterium sp. NAU1659 composed of 333 amino acids with a predicted molecular mass of 36.6 kDa was expressed in Escherichia coli BL21, purified and characterized. The deduced amino acid sequence of FlGluA showed the high identity with the β-1,3-glucanase belonging to glycoside hydrolase (GH) family 16. Enzymological characterization indicated FlGluA had the highest activity on zymosan A, with a specific activity of 3.87 U/mg, followed by curdlan (1.16 U/mg) and pachymaran (0.88 U/mg). It exhibited optimal catalytic activity at the pH 5.0 and 40 °C, and was stable when placed at 4 °C for 12 h in the range of pH 3.0-8.0 or at a temperature below 50 °C for 3 h. Its catalytic activity was enhanced by approximately 36 % in the presence of 1 mM Cr3+. The detection of thin-layer chromatography and mass spectrometry showed FlGluA hydrolyzed zymosan A mainly to glucose and disaccharide, and trace amounts of tetrasaccharide and pentasaccharide, however, it had no action on laminaribiose, indicating its endo-β-1,3-glucanase activity. The mycelium growth of F. oxysporum treated by FlGluA was inhibited, with approximately 37 % of inhibition rate, revealing the potential antifungal activity of the enzyme. These results revealed the hydrolytic properties and biocontrol activity of FlGluA, laying a crucial foundation for its potential application in agriculture and industry.
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Affiliation(s)
- Yanxin Wang
- College of Life Sciences of Liaocheng University, 252000, Liaocheng, PR China; Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture and Rural Affairs, College of Life Sciences of Nanjing Agricultural University, 210095, Nanjing, PR China.
| | - Tingting Xie
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture and Rural Affairs, College of Life Sciences of Nanjing Agricultural University, 210095, Nanjing, PR China
| | - Chenlong Ma
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture and Rural Affairs, College of Life Sciences of Nanjing Agricultural University, 210095, Nanjing, PR China
| | - Yujie Zhao
- College of Life Sciences of Liaocheng University, 252000, Liaocheng, PR China
| | - Jingchen Li
- College of Life Sciences of Liaocheng University, 252000, Liaocheng, PR China
| | - Zhendong Li
- College of Life Sciences of Liaocheng University, 252000, Liaocheng, PR China
| | - Xianfeng Ye
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture and Rural Affairs, College of Life Sciences of Nanjing Agricultural University, 210095, Nanjing, PR China.
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Lv T, Feng J, Jia X, Wang C, Li F, Peng H, Xiao Y, Liu L, He C. Structural insights into curdlan degradation via a glycoside hydrolase containing a disruptive carbohydrate-binding module. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2024; 17:45. [PMID: 38515133 PMCID: PMC10956234 DOI: 10.1186/s13068-024-02494-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 03/16/2024] [Indexed: 03/23/2024]
Abstract
BACKGROUND Degradation via enzymatic processes for the production of valuable β-1,3-glucooligosaccharides (GOS) from curdlan has attracted considerable interest. CBM6E functions as a curdlan-specific β-1,3-endoglucanase, composed of a glycoside hydrolase family 128 (GH128) module and a carbohydrate-binding module (CBM) derived from family CBM6. RESULTS Crystallographic analyses were conducted to comprehend the substrate specificity mechanism of CBM6E. This unveiled structures of both apo CBM6E and its GOS-complexed form. The GH128 and CBM6 modules constitute a cohesive unit, binding nine glucoside moieties within the catalytic groove in a singular helical conformation. By extending the substrate-binding groove, we engineered CBM6E variants with heightened hydrolytic activities, generating diverse GOS profiles from curdlan. Molecular docking, followed by mutation validation, unveiled the cooperative recognition of triple-helical β-1,3-glucan by the GH128 and CBM6 modules, along with the identification of a novel sugar-binding residue situated within the CBM6 module. Interestingly, supplementing the CBM6 module into curdlan gel disrupted the gel's network structure, enhancing the hydrolysis of curdlan by specific β-1,3-glucanases. CONCLUSIONS This study offers new insights into the recognition mechanism of glycoside hydrolases toward triple-helical β-1,3-glucans, presenting an effective method to enhance endoglucanase activity and manipulate its product profile. Furthermore, it discovered a CBM module capable of disrupting the quaternary structures of curdlan, thereby boosting the hydrolytic activity of curdlan gel when co-incubated with β-1,3-glucanases. These findings hold relevance for developing future enzyme and CBM cocktails useful in GOS production from curdlan degradation.
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Affiliation(s)
- Tianhang Lv
- School of Life Sciences and Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei, Anhui, China
| | - Juanjuan Feng
- School of Life Sciences and Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei, Anhui, China
| | - Xiaoyu Jia
- School of Life Sciences and Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei, Anhui, China
| | - Cheng Wang
- School of Life Sciences and Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei, Anhui, China
| | - Fudong Li
- MOE Key Laboratory for Cellular Dynamics, School of Life Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Hui Peng
- School of Life Sciences and Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei, Anhui, China
| | - Yazhong Xiao
- School of Life Sciences and Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei, Anhui, China
| | - Lin Liu
- School of Life Sciences and Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei, Anhui, China
| | - Chao He
- School of Life Sciences and Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei, Anhui, China.
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Wu J, Yang Z, Yang X, Chen X, Zhang H, Zhan X. Synthesis of branched β-1,3-glucan oligosaccharide with narrow degree of polymerization by fungi co-cultivation. Carbohydr Polym 2021; 273:118582. [PMID: 34560984 DOI: 10.1016/j.carbpol.2021.118582] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 08/16/2021] [Accepted: 08/17/2021] [Indexed: 11/30/2022]
Abstract
The large molecular weight and poor water solubility of β-1,3-glucan impede its potential applications. In this study, the β-1,3-glucan producing fungi and Trichoderma harzianum capable of secreting endo-β-1,3-glucanase were co-cultivated to produce branched β-1,3-glucan oligosaccharides (bOβGs) by fermentation with Sclerotium rolfsii and Schizophyllum commune. The highest bOβG yields from S. rolfsii in flasks were 4.53 and 9.94 g/L in a 7 L fermenter. Structural analysis proved that bOβG from S. rolfsii had a narrow degree of polymerization of 5-12, whereas bOβG from S. commune had a degree of polymerization of 5-15. Antioxidant tests showed that both bOβGs had remarkable DPPH radical scavenging activity and hydroxyl radical scavenging activity, and the activity of bOβG from S. commune was better than that of bOβG from S. rolfsii. In addition, bOβGs could promote the secretion of NO by mouse macrophages and increase the production of TNF-α, IL-1β, and IL-6 in RAW264.7.
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Affiliation(s)
- Jianrong Wu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China.
| | - Zelin Yang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Xuechen Yang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Xiaotian Chen
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Hongtao Zhang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Xiaobei Zhan
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
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Gao M, Xu Y, Yang G, Jin S, Hu X, Jiang Y, Zhu L, Li Z, Zhan X. One-step production of functional branched oligoglucosides with coupled fermentation of Pichia pastoris GS115 and Sclerotium rolfsii WSH-G01. BIORESOURCE TECHNOLOGY 2021; 335:125286. [PMID: 34022479 DOI: 10.1016/j.biortech.2021.125286] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/07/2021] [Accepted: 05/08/2021] [Indexed: 06/12/2023]
Abstract
Endo-β-1,3-glucanase with high specific activity is a prerequisite for enzymatic preparation of valuable β-oligoglucosides. Heterologous expression in Pichia pastoris GS115 with error-prone PCR technology was implemented, and the mutant strain 7 N12 was obtained. The mutant endo-β-1,3-glucanase showed efficient specific activities for degrading curdlan (366 U mg-1) and scleroglucan (274.5 U mg-1). Thereafter, one-step production of functional branched oligoglucosides was established with coupled fermentation of Pichia pastoris and Sclerotium rolfsii. During the fermentation process, the endo-β-1,3-glucanase secreted by Pichia pastoris GS115 can efficiently hydrolyse scleroglucan metabolized by Sclerotium rolfsii WSH-G01. The maximum yields of β-oligoglucosides in the shake flasks and 7-L bioreactor reached 1.73 g L-1 and 12.71 g L-1, respectively, with polymerization degrees of 2-17. The successful implementation of heterologous expression with error-prone PCR and the coupled fermentation simplified the multi-step enzymatic β-oligoglucoside preparation procedures, which makes it a potential strategy for industrial production of functional oligosaccharides.
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Affiliation(s)
- Minjie Gao
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, PR China
| | - Ying Xu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, PR China
| | - Guoshuai Yang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, PR China
| | - Shuxia Jin
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, PR China
| | - Xiuyu Hu
- China Biotech Fermentation Industry Association, Beijing 100833, PR China
| | - Yun Jiang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, PR China
| | - Li Zhu
- Wuxi Galaxy Biotech Co. Ltd., Wuxi 214125, PR China
| | - Zhitao Li
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, PR China
| | - Xiaobei Zhan
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, PR China.
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5
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Gao M, Yang G, Li F, Wang Z, Hu X, Jiang Y, Yan J, Li Z, Zhan X. Efficient endo-β-1,3-glucanase expression in Pichia pastoris for co-culture with Agrobacterium sp. for direct curdlan oligosaccharide production. Int J Biol Macromol 2021; 182:1611-1617. [PMID: 34044029 DOI: 10.1016/j.ijbiomac.2021.05.142] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/20/2021] [Accepted: 05/21/2021] [Indexed: 01/01/2023]
Abstract
The production of curdlan oligosaccharides, a multifunctional and valuable carbohydrate, by hydrolyzing polysaccharides is of great interest. The endo-β-1,3-glucanase derived from Trichoderma harzianum was expressed in Pichia pastoris with three commonly used promoters (AOX1, GAP and FLD1). The purified recombinant endo-β-1,3-glucanase expressed by Pichia pastoris with GAP promoter displayed high specific activity at pH 5.5 and 50 °C. Thereafter, a co-culture system of Pichia pastoris GS115 (GAP promoter) and Agrobacterium sp. was constructed in which Agrobacterium sp.-metabolized curdlan can be directly hydrolyzed by Pichia pastoris-secreted endo-β-1,3-glucanase to produce functional curdlan oligosaccharides. The co-culture conditions were optimized and the process was carried out in a 7-L bioreactor. The maximum yield of curdlan oligosaccharides reached 18.77 g/L with 3-10 degrees of polymerization. This study presents a novel and easy curdlan oligosaccharide production strategy that can replace traditional sophisticated production procedures and could potentially be implemented for production of other oligosaccharides.
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Affiliation(s)
- Minjie Gao
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, PR China.
| | - Guoshuai Yang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, PR China
| | - Feifei Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, PR China
| | - Zichao Wang
- College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, PR China
| | - Xiuyu Hu
- China Biotech Fermentation Industry Association, Beijing 100833, PR China
| | - Yun Jiang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, PR China
| | - Jiajun Yan
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, PR China
| | - Zhitao Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, PR China
| | - Xiaobei Zhan
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, PR China.
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Wu J, Yang R, Gao M, Zhang H, Zhan X. Synthesis of functional oligosaccharides and their derivatives through cocultivation and cellular NTP regeneration. ADVANCES IN APPLIED MICROBIOLOGY 2021; 115:35-63. [PMID: 34140133 DOI: 10.1016/bs.aambs.2021.02.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Carbohydrates play an important role in the life cycle. Among them, functional oligosaccharides show a complex and diverse structures with unique physiological activities and biological functions. However, different preparation methods directly affect the structure, molecular weight, and other functions of oligosaccharides, as well as their application fields and manufacturing costs. In the preparation of β-1,3-glucan oligosaccharides (OBGs), water insolubility of β-1,3-glucans hampers the hydrolysis efficiency. The synthesis of some functional oligosaccharides requires the consumption of energy substrates, such as ATP, CTP, and uridine triphosphate, for sugar nucleotide synthesis, leading to increased capital costs. A more economical solution to solve energy supply is to adopt microbial cocultivation or cellular nucleoside triphosphate regeneration. This review focused on the sources, preparation methods, biological activities of OBG, and the cultivation methods and applications of microbial cocultivation and fermentation. We also reviewed the preparation methods of other functional oligosaccharides, such as sialylated oligosaccharides, β-nicotinamide mononucleotide, and α-galacto-oligosaccharides.
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Affiliation(s)
- Jianrong Wu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, China.
| | - Ruoyu Yang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, China
| | - Minjie Gao
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, China
| | - Hongtao Zhang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, China
| | - Xiaobei Zhan
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, China
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7
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Liu D, Wang R, Yang J, Yang Q. Cloning, expression, and functional analysis of the β-1,3-glucanase gene in Ostrinia furnacalis. Biotechnol Appl Biochem 2021; 69:642-649. [PMID: 33650240 DOI: 10.1002/bab.2139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 02/24/2021] [Indexed: 11/07/2022]
Abstract
The β-1,3-glucanase gene in Ostrinia furnacalis was first obtained by RT-PCR. The real-time fluorescence quantitative PCR showed that the expression level of β-1,3-glucanase in the midgut of O. furnacalis was higher than in other tissues. Moreover, the expression level in the larval stage was higher in egg, pupa, and adult stages. The optimal pH of recombinant O. furnacalis β-1,3-glucanase OfLam to the substrate laminarin was 4.5, and the optimum reaction temperature was 50°C. The enzyme exhibited a KM of 1.59 ± 0.28 mg/mL and a kcat of 15.8 ± 0.66 s-1 . Ostrinia furnacalis β-1,3-glucanase has a similar catalytic efficiency to other insect-derived β-1,3-glucanases. The recombinant OfLam has a broad substrate spectrum and can hydrolyze fungal cell walls, suggesting a new source of enzymes for biological control strategies that target fungal cell walls.
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Affiliation(s)
- Danmei Liu
- Agricultural College, Eastern Liaoning University, Dandong, China.,State Key Laboratory for Biology of Plant Diseases and Insect Pests, School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Rui Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Jun Yang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Qing Yang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection and Shenzhen Agricultural Genome Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
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8
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Li Z, Liu W, Lyu Q. Biochemical Characterization of a Novel Endo-1,3-β-Glucanase from the Scallop Chlamys farreri. Mar Drugs 2020; 18:md18090466. [PMID: 32947865 PMCID: PMC7551256 DOI: 10.3390/md18090466] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 09/11/2020] [Accepted: 09/13/2020] [Indexed: 01/05/2023] Open
Abstract
Endo-1,3-β-glucanases derived from marine mollusks have attracted much attention in recent years because of their unique transglycosylation activity. In this study, a novel endo-1,3-β-glucanase from the scallop Chlamys farreri, named Lcf, was biochemically characterized. Unlike in earlier studies on marine mollusk endo-1,3-β-glucanases, Lcf was expressed in vitro first. Enzymatic analysis demonstrated that Lcf preferred to hydrolyze laminarihexaose than to hydrolyze laminarin. Furthermore, Lcf was capable of catalyzing transglycosylation reactions with different kinds of glycosyl acceptors. More interestingly, the transglycosylation specificity of Lcf was different from that of other marine mollusk endo-1,3-β-glucanases, although they share a high sequence identity. This study enhanced our understanding of the diverse enzymatic specificities of marine mollusk endo-1,3-β-glucanases, which facilitated development of a unique endo-1,3-β-glucanase tool in the synthesis of novel glycosides.
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Affiliation(s)
- Zhijian Li
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; (Z.L.); (W.L.)
| | - Weizhi Liu
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; (Z.L.); (W.L.)
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266235, China
| | - Qianqian Lyu
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; (Z.L.); (W.L.)
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266235, China
- Correspondence:
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Li K, Chen W, Wang W, Tan H, Li S, Yin H. Effective degradation of curdlan powder by a novel endo-β-1→3-glucanase. Carbohydr Polym 2018; 201:122-130. [DOI: 10.1016/j.carbpol.2018.08.048] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 07/18/2018] [Accepted: 08/10/2018] [Indexed: 12/24/2022]
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Liang Y, Zhu L, Gao M, Wu J, Zhan X. Effective production of biologically active water-soluble β-1,3-glucan by a coupled system of Agrobacterium sp. and Trichoderma harzianum. Prep Biochem Biotechnol 2018; 48:446-456. [PMID: 29561218 DOI: 10.1080/10826068.2018.1452259] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Water-soluble β-1,3-glucan (w-glucan) prepared from curdlan is reported to possess various bioactive and medicinal properties. To develop an efficient and cost-effective microbial fermentation method for the direct production of w-glucan, a coupled fermentation system of Agrobacterium sp. and Trichoderma harzianum (CFS-AT) was established. The effects of Tween-80, glucose flow rate, and the use of a dissolved oxygen (DO) control strategy on w-glucan production were assessed. The addition of 10 g L-1 Tween-80 to the CFS-AT enhanced w-glucan production, presumably by loosening the curdlan ultrastructure and increasing the efficiency of curdlan hydrolysis. A two-stage glucose and DO control strategy was optimal for w-glucan production. At the T. harzianum cell growth stage, the optimal glucose flow rate and agitation speed were 2.0 g L-1 hr-1 and 600 rpm, respectively, and at the w-glucan production stage, they were 0.5 g L-1 hr-1 and 400 rpm, respectively. W-glucan production reached 17.31 g L-1, with a degree of polymerization of 19-25. Furthermore, w-glucan at high concentrations exhibited anti-tumor activity against MCF-7, HepG2, and Hela cancer cells in vitro. This study provides a novel, cost-effective, eco-friendly, and efficient microbial fermentation method for the direct production of biologically active w-glucan.
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Affiliation(s)
- Ying Liang
- a Ministry of Education, Key Lab Carbohydrate Chemical and Biotechnology, School of Biotechnology , Jiangnan University , Wuxi , Jiangsu , China
| | - Li Zhu
- b Jiangsu Rayguang Biotech Co. Ltd. , Wuxi , Jiangsu , China
| | - Minjie Gao
- a Ministry of Education, Key Lab Carbohydrate Chemical and Biotechnology, School of Biotechnology , Jiangnan University , Wuxi , Jiangsu , China
| | - Jianrong Wu
- a Ministry of Education, Key Lab Carbohydrate Chemical and Biotechnology, School of Biotechnology , Jiangnan University , Wuxi , Jiangsu , China
| | - Xiaobei Zhan
- a Ministry of Education, Key Lab Carbohydrate Chemical and Biotechnology, School of Biotechnology , Jiangnan University , Wuxi , Jiangsu , China
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A first glycoside hydrolase family 50 endo-β-1,3-d-glucanase from Pseudomonas aeruginosa. Enzyme Microb Technol 2018; 108:34-41. [DOI: 10.1016/j.enzmictec.2017.09.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 08/26/2017] [Accepted: 09/02/2017] [Indexed: 01/18/2023]
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12
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Cao L, Tian H, Wu M, Zhang H, Zhou P, Huang Q. Determination of Curdlan Oligosaccharides with High-Performance Anion Exchange Chromatography with Pulsed Amperometric Detection. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2018; 2018:3980814. [PMID: 31049244 PMCID: PMC6462318 DOI: 10.1155/2018/3980814] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 05/07/2018] [Accepted: 05/16/2018] [Indexed: 05/13/2023]
Abstract
The increasing interest of curdlan oligosaccharides (COS) in medicine and plant protection fields implies a necessity to identify and quantify this product. In the present study, an efficient and sensitive analytical method based on high-performance anion exchange chromatography with pulsed amperometric detection (HPAEC-PAD) was established for the simultaneous separation and determination of D-glucose and ß-1,3-linked COS ranging from (COS)2 to (COS)6 within 20 min. Detection limits were 0.01 to 0.03 mg/L. The optimized assay was performed on a CarboPac-PA100 analytical column (4 mm × 250 mm) using isocratic elution with water-0.2 M sodium hydroxide-0.5 M sodium acetate mixture (50 : 30 : 20, v/v/v) as the mobile phase at a flow rate of 0.8 mL/min. Regression equations indicated a good linear relationship (R 2 = 0.9992-1.0000, n = 6) within the test ranges. Quality parameters including precision and accuracy were fully validated and found to be satisfactory. More important, the regression of natural logarithm values of retention times (log10 RT) versus the degree polymerization (DP), as well as the slope coefficient of each COS's linear equation versus the corresponding DP, fitted a linear relationship well. These inherent linear relationships could provide valuable information to tentatively identify and quantify the COS even with the DP more than 6 without authentic standard. Furthermore, when the log10 RT was plotted against log10 flow rate for each COS, a perfect linear relationship was also observed.
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Affiliation(s)
- Lidong Cao
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, No. 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Huifang Tian
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Central Laboratory, Peking University Cancer Hospital & Institute, No. 52 Fucheng Road, Beijing 100142, China
| | - Miaomiao Wu
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, No. 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Hongjun Zhang
- Ministry of Agriculture, Institute for the Control of Agrochemicals, No. 22 Maizidian Street, Beijing 110000, China
| | - Puguo Zhou
- Ministry of Agriculture, Institute for the Control of Agrochemicals, No. 22 Maizidian Street, Beijing 110000, China
| | - Qiliang Huang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, No. 2 Yuanmingyuan West Road, Beijing 100193, China
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Enhanced production of curdlan by coupled fermentation system of Agrobacterium sp. ATCC 31749 and Trichoderma harzianum GIM 3.442. Carbohydr Polym 2017; 157:1687-1694. [DOI: 10.1016/j.carbpol.2016.11.055] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 11/04/2016] [Accepted: 11/18/2016] [Indexed: 12/28/2022]
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