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Zhou X, Zhou X, Zhang X, Dong H, Dong Y, Zhu H. Secretory CAZymes profile and GH19 enzymes analysis of Corallococcus silvisoli c25j21. Front Microbiol 2024; 15:1324153. [PMID: 38374914 PMCID: PMC10875029 DOI: 10.3389/fmicb.2024.1324153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 01/15/2024] [Indexed: 02/21/2024] Open
Abstract
Extracellular enzymes play important roles in myxobacteria degrading macromolecules and preying on other microorganisms. Glycoside hydrolases 19 (GH19) are widely present in myxobacteria, but their evolution and biological functions have not been fully elucidated. Here we investigated the comparative secretory proteome of Corallococcus silvisoli c25j21 in the presence of cellulose and chitin. A total of 313 proteins were detected, including 16 carbohydrate-active enzymes (CAZymes), 7 of which were induced by cellulose or chitin, such as GH6, GH13, GH19, AA4, and CBM56. We further analyzed the sequence and structural characteristics of its three GH19 enzymes to understand their potential functions. The results revealed that myxobacterial GH19 enzymes are evolutionarily divided into two clades with different appended modules, and their different amino acid compositions in the substrate binding pockets lead to the differences in molecular surface electrostatic potentials, which may, in turn, affect their substrate selectivity and biological functions. Our study is helpful for further understanding the biological functions and catalytic mechanisms of myxobacterial CAZymes.
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Affiliation(s)
| | | | | | | | | | - Honghui Zhu
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Key Laboratory of Agricultural Microbiome (MARA), State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
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Wang H, Zhang R, Hu J, Fu R, Li J. In vitro and in silico analyses reveal the interaction between LysM receptor-like kinase3 of Solanum tuberosum and the carbohydrate elicitor Riclin octaose. Biotechnol J 2024; 19:e2300385. [PMID: 37903287 DOI: 10.1002/biot.202300385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 09/27/2023] [Accepted: 10/25/2023] [Indexed: 11/01/2023]
Abstract
As a carbohydrate elicitor, Riclin octaose (Rioc) activates the pattern-triggered immunity of Solanum tuberosum L., while how the plant perceives Rioc is unknown. Here, a pattern recognition receptor StLYK3 (LysM receptor-like kinase3) whose transcription level was significantly up-regulated after Rioc elicitation was investigated in vitro and in silico. The nucleotide that encoded the ectodomain of StLYK3 (StLYK3-ECD) was heterologously expressed in the Pichia pastoris strain GS115. The purified StLYK3-ECD had the molecular weight of 25.08 kDa and pI of 5.69. Afterwards interaction between StLYK3-ECD and Rioc was analyzed by isothermal titration calorimetry. The molar ratio of ligand to receptor, dissociation constant, and enthalpy were 1.28 ± 0.04, 26.7 ± 3.1 μM, and -45.0 ± 1.8 kJ mol-1 , respectively. Besides, molecular dynamics results indicated that StLYK3-ECD contained three carbohydrate-binding motifs and the first two motifs probably contributed to the interaction with Rioc via hydrogen bond and van de Waals' forces. Amino acids containing hydroxyl, amidic, and sulfhydryl groups took the main portion in the docking site. Moreover, replacing the 92nd threonyl (T) of StLYK3-ECD with valyl (V) resulted in the alteration of the preferred docking site. The dissociation constant drastically increased to 841.6 ± 232.4 μM. In conclusion, StLYK3 was a potential receptor of Rioc.
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Affiliation(s)
- Hongyang Wang
- Key Laboratory of Metabolic Engineering and Biosynthesis Technology, Ministry of Industry and Information Technology, Nanjing University of Science and Technology, Nanjing, China
| | - Ruixin Zhang
- Key Laboratory of Metabolic Engineering and Biosynthesis Technology, Ministry of Industry and Information Technology, Nanjing University of Science and Technology, Nanjing, China
| | - Junpeng Hu
- Key Laboratory of Metabolic Engineering and Biosynthesis Technology, Ministry of Industry and Information Technology, Nanjing University of Science and Technology, Nanjing, China
| | - Renjie Fu
- Key Laboratory of Metabolic Engineering and Biosynthesis Technology, Ministry of Industry and Information Technology, Nanjing University of Science and Technology, Nanjing, China
| | - Jing Li
- Key Laboratory of Metabolic Engineering and Biosynthesis Technology, Ministry of Industry and Information Technology, Nanjing University of Science and Technology, Nanjing, China
- Center for Molecular Metabolism, Nanjing University of Science and Technology, Nanjing, China
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Dong Z, Yang S, Dong X, Yang Y, Yan X, Su J, Tang C, Yao L, Kan Y. Characteristics, Protein Engineering, Heterologous Production, and Industrial Applications of Microbial Isoamylases. STARCH-STARKE 2021. [DOI: 10.1002/star.202100192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zixing Dong
- Henan Provincial Engineering Laboratory of Insect Bio‐reactor College of Life Science and Agricultural Engineering Nanyang Normal University Nanyang 473061 China
| | - Shuangshuang Yang
- College of Physical Education Nanyang Normal University Nanyang 473061 China
| | - Xiaoxiao Dong
- Henan Provincial Engineering Laboratory of Insect Bio‐reactor College of Life Science and Agricultural Engineering Nanyang Normal University Nanyang 473061 China
| | - Yongna Yang
- Henan Provincial Engineering Laboratory of Insect Bio‐reactor College of Life Science and Agricultural Engineering Nanyang Normal University Nanyang 473061 China
| | - Xueting Yan
- Henan Provincial Engineering Laboratory of Insect Bio‐reactor College of Life Science and Agricultural Engineering Nanyang Normal University Nanyang 473061 China
| | - Jiejie Su
- Henan Provincial Engineering Laboratory of Insect Bio‐reactor College of Life Science and Agricultural Engineering Nanyang Normal University Nanyang 473061 China
| | - Cunduo Tang
- Henan Provincial Engineering Laboratory of Insect Bio‐reactor College of Life Science and Agricultural Engineering Nanyang Normal University Nanyang 473061 China
- China‐UK‐NYNU‐RRes Joint Laboratory of Insect Biology Henan Key Laboratory of Insect Biology in Funiu Mountain Nanyang Normal University Nanyang Henan 473061 China
| | - Lunguang Yao
- Henan Provincial Engineering Laboratory of Insect Bio‐reactor College of Life Science and Agricultural Engineering Nanyang Normal University Nanyang 473061 China
- Henan Key Laboratory of Ecological Security for Water Region of Mid‐line of South‐to‐North Nanyang Normal University Nanyang 473061 China
| | - Yunchao Kan
- Henan Provincial Engineering Laboratory of Insect Bio‐reactor College of Life Science and Agricultural Engineering Nanyang Normal University Nanyang 473061 China
- China‐UK‐NYNU‐RRes Joint Laboratory of Insect Biology Henan Key Laboratory of Insect Biology in Funiu Mountain Nanyang Normal University Nanyang Henan 473061 China
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Xia C, Zhong L, Wang J, Zhang L, Chen X, Ji H, Ma S, Dong W, Ye X, Huang Y, Li Z, Cui Z. Structural and digestion properties of potato starch modified using an efficient starch branching enzyme AqGBE. Int J Biol Macromol 2021; 184:551-557. [PMID: 34171255 DOI: 10.1016/j.ijbiomac.2021.06.135] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 05/24/2021] [Accepted: 06/20/2021] [Indexed: 11/25/2022]
Abstract
Modified potato starch with slower digestion may aid the development of new starch derivatives with improved nutritional values, and strategies to increase nutritional fractions such as resistant starch (RS) are desired. In this study, a correspondence between starch structure and enzymatic resistance was provided based on the efficient branching enzyme AqGBE, and modified starches with different amylose content (Control, 100%; PS1, 90%; PS2, 72%; PS3, 32%; PS4, 18%) were prepared. Through SEM observation, NMR and X-ray diffraction analyses, we identified that an increased proportion of α-1,6-linked branches in potato starch changes its state of granule into large pieces with crystallinity. Molecular weight and chain-length distribution analysis showed a decrease of molecular weight (from 1.1 × 106 to 1.1 × 105 g/mol) without an obvious change of chain-length distribution in PS1, while PS2-4 exhibited an increased proportion of DP 6-12 with a stable molecular weight distribution, indicating a distinct model of structural modification by AqGBE. The enhancement of peak viscosity was related to increased hydrophobic interactions and pieces state of PS1, while the contents of SDS and RS in PS1 increased by 37.7 and 49.4%, respectively. Our result provides an alternative way to increase the RS content of potato starch by branching modification.
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Affiliation(s)
- Chengyao Xia
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Lingli Zhong
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Juying Wang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Lei Zhang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Xiaopei Chen
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Hangyan Ji
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Shiyun Ma
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Weiliang Dong
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China
| | - Xianfeng Ye
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Yan Huang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Zhoukun Li
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China.
| | - Zhongli Cui
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
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Ye X, Liu W, Ma S, Chen X, Qiao Y, Zhao Y, Fan Q, Li X, Dong C, Fang X, Huan M, Han J, Huang Y, Cui Z, Li Z. Expression and characterization of 1,4-α-glucan branching enzyme from Microvirga sp. MC18 and its application in the preparation of slowly digestible starch. Protein Expr Purif 2021; 185:105898. [PMID: 33962003 DOI: 10.1016/j.pep.2021.105898] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 03/25/2021] [Accepted: 04/30/2021] [Indexed: 10/21/2022]
Abstract
Nutraceuticals containing modified starch with increased content of slowly-digestible starch (SDS) may reduce the prevalence of obesity, diabetes and cardiovascular diseases due to its slow digestion rate. Enzymatic methods for the preparation of modified starch have attracted increasing attention because of their low environmental impact, safety and specificity. In this study, the efficient glucan branching enzyme McGBE from Microvirga sp. MC18 was identified, and its relevant properties as well as its potential for industrial starch modification were evaluated. The purified McGBE exhibited the highest specificity for potato starch, with a maximal specific activity of 791.21 U/mg. A time-dependent increase in the content of α-1,6 linkages from 3.0 to 6.0% was observed in McGBE-modified potato starch. The proportion of shorter chains (degree of polymerization, DP < 13) increased from 29.2 to 63.29% after McGBE treatment, accompanied by a reduction of the medium length chains (DP 13-24) from 52.30 to 35.99% and longer chains (DP > 25) from 18.51 to 0.72%. The reduction of the storage modulus (G') and retrogradation enthalpy (ΔHr) of potato starch with increasing treatment time demonstrated that McGBE could inhibit the short- and long-term retrogradation of starch. Under the optimal conditions, the SDS content of McGBE-modified potato starch increased by 65.8% compared to native potato starch. These results suggest that McGBE has great application potential for the preparation of modified starch with higher SDS content that is resistant to retrogradation.
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Affiliation(s)
- Xianfeng Ye
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing, 210095, China
| | - Wei Liu
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shiyun Ma
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xiaopei Chen
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yan Qiao
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yuqiang Zhao
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing, 210095, China
| | - Qiwen Fan
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xu Li
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing, 210095, China
| | - Chaonan Dong
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xiaodong Fang
- Guangzhou Hanyun Pharmaceutical Technology Co. Ltd., Guangzhou, 510000, China
| | - Minghui Huan
- Microbial Research Institute of Liaoning Province, Chaoyang, 122000, China
| | - Jian Han
- College of Agriculture, Xinjiang Agricultural University, XinJiang, 830052, China
| | - Yan Huang
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhongli Cui
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Zhoukun Li
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing, 210095, China.
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Jaafar NR, Ahmad RA, Nawawi NN, Abd Rahman NH, Shamsul Annuar NA, Rahman RA, Illias RM. Synergistic action of cyclodextrin glucanotransferase and maltogenic amylase improves the bioconversion of starch to malto-oligosaccharides. Process Biochem 2021. [DOI: 10.1016/j.procbio.2021.02.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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