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Lu Y, Sui L, Dai C, Zheng W, Zhao Y, Li Q, Liang X, Li Q, Zhang Z. Immobilization of Bacillus thuringiensis Cry1Ac in metal-organic frameworks through biomimetic mineralization for sustainable pest management. Int J Biol Macromol 2024; 274:133388. [PMID: 38925193 DOI: 10.1016/j.ijbiomac.2024.133388] [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: 04/11/2024] [Revised: 06/03/2024] [Accepted: 06/21/2024] [Indexed: 06/28/2024]
Abstract
Traditional chemical pesticide dosage forms and crude application methods have resulted in low pesticide utilization, increased environmental pollution, and the development of resistance. Compared to traditional pesticides, nanopesticides enhance the efficiency of pesticide utilization and reduce the quantity required, thereby decreasing environmental pollution. Herein, Cry1Ac insecticidal crystal protein from Bacillus thuringiensis Subsp. Kurstaki HD-73 was encapsulated in a metal-organic framework (zeolite imidazolate framework-8, ZIF-8) through biomimetic mineralization to obtain Cry1Ac@ZIF-8 nanopesticides. The Cry1Ac@ZIF-8 nanopesticides exhibited a dodecahedral porous structure, and the introduction of Cry1Ac did not affect the intrinsic crystal structure of ZIF-8. The indoor toxicity analysis revealed that the toxicity of Cry1Ac towards Ostrinia furnacalis (Guenée), Helicoverpa armigera Hubner, and Spodoptera litura Fabricius was not affected by ZIF-8 encapsulation. Surprisingly, Cry1Ac@ZIF-8 still exhibited excellent pest management efficacy even after exposure to heat, UV irradiation, and long-term storage. More importantly, the encapsulation of ZIF-8 significantly enhanced the internal absorption performance of Cry1Ac in maize leaves and extended its persistence period. Thus, ZIF-8 could potentially serve as a promising carrier for the preparation of nanopesticides with enhanced applicability, stability, and persistence period, providing a powerful strategy to improve the application of Cry1Ac in future agricultural pest management.
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Affiliation(s)
- Yang Lu
- Institute of Plant Protection, Jilin Academy of Agricultural Science/Jilin Key Laboratory of Agricultural Microbiology/Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Gongzhuling 136100, China
| | - Li Sui
- Institute of Plant Protection, Jilin Academy of Agricultural Science/Jilin Key Laboratory of Agricultural Microbiology/Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Gongzhuling 136100, China
| | - Chunyan Dai
- Institute of Virology and AIDS Research, The First Hospital of Jilin University, Changchun 130000, China
| | - Wenjing Zheng
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, China
| | - Yu Zhao
- Institute of Plant Protection, Jilin Academy of Agricultural Science/Jilin Key Laboratory of Agricultural Microbiology/Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Gongzhuling 136100, China
| | - Quanshun Li
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun 130012, China
| | - Xiao Liang
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun 130012, China.
| | - Qiyun Li
- Institute of Plant Protection, Jilin Academy of Agricultural Science/Jilin Key Laboratory of Agricultural Microbiology/Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Gongzhuling 136100, China; Jilin Agricultural Science and Technology University, Jilin 132109, China.
| | - Zhengkun Zhang
- Institute of Plant Protection, Jilin Academy of Agricultural Science/Jilin Key Laboratory of Agricultural Microbiology/Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Gongzhuling 136100, China.
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Chen W, Amir MB, Liao Y, Yu H, He W, Lu Z. New Insights into the Plutella xylostella Detoxifying Enzymes: Sequence Evolution, Structural Similarity, Functional Diversity, and Application Prospects of Glucosinolate Sulfatases. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:10952-10969. [PMID: 37462091 PMCID: PMC10375594 DOI: 10.1021/acs.jafc.3c03246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
Brassica plants have glucosinolate (GLs)-myrosinase defense mechanisms to deter herbivores. However, Plutella xylostella specifically feeds on Brassica vegetables. The larvae possess three glucosinolate sulfatases (PxGSS1-3) that compete with plant myrosinase for shared GLs substrates and produce nontoxic desulfo-GLs (deGLs). Although PxGSSs are considered potential targets for pest control, the lack of a comprehensive review has hindered the development of PxGSSs-targeted pest control methods. Recent advances in integrative multi-omics analysis, substrate-enzyme kinetics, and molecular biological techniques have elucidated the evolutionary origin and functional diversity of these three PxGSSs. This review summarizes research progress on PxGSSs over the past 20 years, covering sequence properties, evolution, protein modification, enzyme activity, structural variation, substrate specificity, and interaction scenarios based on functional diversity. Finally, we discussed the potential applications of PxGSSs-targeted pest control technologies driven by artificial intelligence, including CRISPR/Cas9-mediated gene drive, transgenic plant-mediated RNAi, small-molecule inhibitors, and peptide inhibitors. These technologies have the potential to overcome current management challenges and promote the development and field application of PxGSSs-targeted pest control.
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Affiliation(s)
- Wei Chen
- Ganzhou Key Laboratory of Greenhouse Vegetable, School of Life Sciences, Gannan Normal University, Ganzhou 341000, China
| | - Muhammad Bilal Amir
- Ganzhou Key Laboratory of Greenhouse Vegetable, School of Life Sciences, Gannan Normal University, Ganzhou 341000, China
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Yuan Liao
- Ganzhou Key Laboratory of Greenhouse Vegetable, School of Life Sciences, Gannan Normal University, Ganzhou 341000, China
| | - Haizhong Yu
- Ganzhou Key Laboratory of Greenhouse Vegetable, School of Life Sciences, Gannan Normal University, Ganzhou 341000, China
| | - Weiyi He
- State Key Laboratory for Ecological Pest Control of Fujian and Taiwan Crops, International Joint Research Laboratory of Ecological Pest Control, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Zhanjun Lu
- Ganzhou Key Laboratory of Greenhouse Vegetable, School of Life Sciences, Gannan Normal University, Ganzhou 341000, China
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Xiao Z, Yao X, Bai S, Wei J, An S. Involvement of an Enhanced Immunity Mechanism in the Resistance to Bacillus thuringiensis in Lepidopteran Pests. INSECTS 2023; 14:151. [PMID: 36835720 PMCID: PMC9965922 DOI: 10.3390/insects14020151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 01/21/2023] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
Bacillus thuringiensis (Bt) is the safest, economically successful entomopathogen to date. It is extensively produced in transgenic crops or used in spray formulations to control Lepidopteran pests. The most serious threat to the sustainable usage of Bt is insect resistance. The resistance mechanisms to Bt toxins depend not only on alterations in insect receptors, but also on the enhancement of insect immune responses. In this work, we review the current knowledge of the immune response and resistance of insects to Bt formulations and Bt proteins, mainly in Lepidopteran pests. We discuss the pattern recognition proteins for recognizing Bt, antimicrobial peptides (AMPs) and their synthetic signaling pathways, the prophenoloxidase system, reactive oxygen species (ROS) generation, nodulation, encapsulation, phagocytosis, and cell-free aggregates, which are involved in immune response reactions or resistance to Bt. This review also analyzes immune priming, which contributes to the evolution of insect resistance to Bt, and puts forward strategies to improve the insecticidal activity of Bt formulations and manage insect resistance, targeting the insect immune responses and resistance.
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Quantum-Dot-Bead-Based Fluorescence-Linked Immunosorbent Assay for Sensitive Detection of Cry2A Toxin in Cereals Using Nanobodies. Foods 2022; 11:foods11182780. [PMID: 36140908 PMCID: PMC9497650 DOI: 10.3390/foods11182780] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 08/21/2022] [Accepted: 08/25/2022] [Indexed: 12/29/2022] Open
Abstract
In this study, a quantum-dot-bead (QB)-based fluorescence-linked immunosorbent assay (FLISA) using nanobodies was established for sensitive determination of the Cry2A toxin in cereal. QBs were used as the fluorescent probe and conjugated with a Cry2A polyclonal antibody. An anti-Cry2A nanobody P2 was expressed and used as the capture antibody. The results revealed that the low detection limit of the developed QB-FLISA was 0.41 ng/mL, which had a 19-times higher sensitivity than the traditional colorimetric ELISA. The proposed assay exhibited a high specificity for the Cry2A toxin, and it had no evident cross-reactions with other Cry toxins. The recoveries of Cry2A from the spiked cereal sample ranged from 86.6–117.3%, with a coefficient of variation lower than 9%. Moreover, sample analysis results of the QB-FLISA and commercial ELISA kit correlated well with each other. These results indicated that the developed QB-FLISA provides a potential approach for the sensitive determination of the Cry2A toxin in cereals.
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Lu JW, Jin L, Li MG, Yu BQ, Wen YF, Gu YQ, Lin Y, Yu XQ. A possible mechanism of Cry7Ab4 protein in delaying pupation of Plutella xylostella larvae. Front Immunol 2022; 13:849620. [PMID: 36159828 PMCID: PMC9491089 DOI: 10.3389/fimmu.2022.849620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 08/15/2022] [Indexed: 11/13/2022] Open
Abstract
Cry toxins produced by Bacillus thuringiensis (Bt) are well known for their insecticidal activities against Lepidopteran, Dipteran, and Coleopteran species. In our previous work, we showed that trypsin-digested full-length Cry7Ab4 protoxin did not have insecticidal activity against Plutella xylostella larvae but strongly inhibited their growth. In this paper, we expressed and purified recombinant active Cry7Ab4 toxic core from Escherichia coli for bioassay and identified its binding proteins. Interestingly, Cry7Ab4 toxic core exhibited activity to delay the pupation of P. xylostella larvae. Using protein pull-down assay, several proteins, including basic juvenile hormone-suppressible protein 1-like (BJSP-1), were identified from the midgut juice of P. xylostella larvae as putative Cry7Ab4-binding proteins. We showed that feeding P. xylostella larval Cry7Ab4 toxic core upregulated the level of BJSP-1 mRNA in the hemocytes and fat body and decreased the free juvenile hormone (JH) level in larvae. BJSP-1 interacted with Cry7Ab4 and bound to free JH in vitro. A possible mechanism of Cry7Ab4 in delaying the pupation of P. xylostella larvae was proposed.
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Affiliation(s)
- Jing-Wen Lu
- Fujian Provincial Key Laboratory of Biochemical Technology, Department of Bioengineering and Biotechnology, College of Chemical Engineering, Huaqiao University, Xiamen, China
| | - Liang Jin
- Fujian Provincial Key Laboratory of Biochemical Technology, Department of Bioengineering and Biotechnology, College of Chemical Engineering, Huaqiao University, Xiamen, China
| | - Meng-Ge Li
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Bryan Q. Yu
- International Department, The Affiliated High School of South China Normal University, Guangzhou, China
| | - Yang-Fan Wen
- Fujian Provincial Key Laboratory of Biochemical Technology, Department of Bioengineering and Biotechnology, College of Chemical Engineering, Huaqiao University, Xiamen, China
| | - Yu-Qing Gu
- Fujian Provincial Key Laboratory of Biochemical Technology, Department of Bioengineering and Biotechnology, College of Chemical Engineering, Huaqiao University, Xiamen, China
| | - Yi Lin
- Fujian Provincial Key Laboratory of Biochemical Technology, Department of Bioengineering and Biotechnology, College of Chemical Engineering, Huaqiao University, Xiamen, China
- *Correspondence: Yi Lin, ; Xiao-Qiang Yu,
| | - Xiao-Qiang Yu
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, China
- *Correspondence: Yi Lin, ; Xiao-Qiang Yu,
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Yin Y, Cao K, Zhao X, Cao C, Dong X, Liang J, Shi W. Bt Cry1Ab/2Ab toxins disrupt the structure of the gut bacterial community of Locusta migratoria through host immune responses. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 238:113602. [PMID: 35526455 DOI: 10.1016/j.ecoenv.2022.113602] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 04/26/2022] [Accepted: 05/01/2022] [Indexed: 06/14/2023]
Abstract
The gut microbiota of insects plays a vital role in digestion, nutrient acquisition, metabolism of dietary toxins, pathogen immunity and maintenance of gut homeostasis. Bacillus thuringinensis (Bt) poisons target insects through its toxins that are activated in the insect gut. The effects of Bt toxins on gut microbiota of insects and their underlying mechanisms are not well understood. In this study, we found that Cry1Ab/2Ab toxins significantly changed the gut bacterial community's structure and reduced the total load of gut bacteria in the Locusta migratoria. In addition, Cry toxins significantly increased the level of reactive oxygen species (ROS) in the gut of locusts. Our results also showed that Cry1Ab/2Ab toxins induced the host gut's immune response by up-regulating of key genes in the Immune deficiency (IMD) and Toll pathway. RNA interference showed that knocking down Relish could narrow the difference in the load, diversity, and composition in gut bacteria caused by Cry toxins. Our findings suggest that Bt potentially influences the gut bacterial community of L. migratoria through host immune response.
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Affiliation(s)
- Yue Yin
- Department of Entomology and MOA Key Lab of Pest Monitoring and Green Management, China Agricultural University, Beijing 100094, China.
| | - Kaili Cao
- Department of Entomology and MOA Key Lab of Pest Monitoring and Green Management, China Agricultural University, Beijing 100094, China.
| | - Xinxin Zhao
- Department of Entomology and MOA Key Lab of Pest Monitoring and Green Management, China Agricultural University, Beijing 100094, China.
| | - Chuan Cao
- Department of Entomology and MOA Key Lab of Pest Monitoring and Green Management, China Agricultural University, Beijing 100094, China.
| | - Xuehui Dong
- Department of Agriculture Science, China Agricultural University, Beijing 100094, China.
| | - Jingang Liang
- Development Center of Science and Technology, Ministry of Agriculture and Rural Affairs, Beijing 100176, China.
| | - Wangpeng Shi
- Department of Entomology and MOA Key Lab of Pest Monitoring and Green Management, China Agricultural University, Beijing 100094, China.
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Li S, Xu X, De Mandal S, Shakeel M, Hua Y, Shoukat RF, Fu D, Jin F. Gut microbiota mediate Plutella xylostella susceptibility to Bt Cry1Ac protoxin is associated with host immune response. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 271:116271. [PMID: 33401210 DOI: 10.1016/j.envpol.2020.116271] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 11/27/2020] [Accepted: 12/08/2020] [Indexed: 06/12/2023]
Abstract
Insect gut microbiotas have a variety of physiological functions for host growth, development, and immunity. Bacillus thuringiensis (Bt) is known to kill insect pests by releasing insecticidal protoxins, which are activated in the insect midgut. However, the interplay among Bt infection, host immunity, and gut microbiota are still unclear. Here we show that Bt Cry1Ac protoxin interacts with the gut microbiota to accelerate the mortality of P. xylostella larvae. Cry1Ac protoxin was found to cause a dynamic change in the midgut and hemocoel microbiota of P. xylostella, with a significant increase in bacterial load and a significant reduction in bacterial diversity. In turn, loss of gut microbiota significantly decreased the Bt susceptibility of P. xylostella larvae. The introduction of three gut bacterial isolates Enterococcus mundtii (PxG1), Carnobacterium maltaromaticum (PxCG2), and Acinetobacter guillouiae (PxCG3) restored sensitivity to Bt Cry1Ac protoxin. We also found that Cry1Ac protoxin and native gut microbiota can trigger host midgut immune response, which involves the up-regulation of expression of Toll and IMD pathway genes and most antimicrobial peptide genes, respectively. Our findings further shed light on the interplay between insect gut microbiota and host immunity under the Bt toxin killing pressure, and this may provide insights for improving the management of Bt resistance and lead to new strategies for biological control of insect pests.
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Affiliation(s)
- Shuzhong Li
- College of Plant Protection, South China Agricultural University, Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, Guangzhou, PR China
| | - Xiaoxia Xu
- College of Plant Protection, South China Agricultural University, Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, Guangzhou, PR China
| | - Surajit De Mandal
- College of Plant Protection, South China Agricultural University, Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, Guangzhou, PR China
| | - Muhammad Shakeel
- College of Plant Protection, South China Agricultural University, Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, Guangzhou, PR China
| | - Yanyan Hua
- College of Plant Protection, South China Agricultural University, Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, Guangzhou, PR China
| | - Rana Fartab Shoukat
- College of Plant Protection, South China Agricultural University, Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, Guangzhou, PR China
| | - Dongran Fu
- College of Plant Protection, South China Agricultural University, Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, Guangzhou, PR China
| | - Fengliang Jin
- College of Plant Protection, South China Agricultural University, Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, Guangzhou, PR China.
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The Tripartite Interaction of Host Immunity- Bacillus thuringiensis Infection-Gut Microbiota. Toxins (Basel) 2020; 12:toxins12080514. [PMID: 32806491 PMCID: PMC7472377 DOI: 10.3390/toxins12080514] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 08/05/2020] [Accepted: 08/07/2020] [Indexed: 12/12/2022] Open
Abstract
Bacillus thuringiensis (Bt) is an important cosmopolitan bacterial entomopathogen, which produces various protein toxins that have been expressed in transgenic crops. The evolved molecular interaction between the insect immune system and gut microbiota is changed during the Bt infection process. The host immune response, such as the expression of induced antimicrobial peptides (AMPs), the melanization response, and the production of reactive oxygen species (ROS), varies with different doses of Bt infection. Moreover, B. thuringiensis infection changes the abundance and structural composition of the intestinal bacteria community. The activated immune response, together with dysbiosis of the gut microbiota, also has an important effect on Bt pathogenicity and insect resistance to Bt. In this review, we attempt to clarify this tripartite interaction of host immunity, Bt infection, and gut microbiota, especially the important role of key immune regulators and symbiotic bacteria in the Bt killing activity. Increasing the effectiveness of biocontrol agents by interfering with insect resistance and controlling symbiotic bacteria can be important steps for the successful application of microbial biopesticides.
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Lin J, Yu XQ, Wang Q, Tao X, Li J, Zhang S, Xia X, You M. Immune responses to Bacillus thuringiensis in the midgut of the diamondback moth, Plutella xylostella. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2020; 107:103661. [PMID: 32097696 DOI: 10.1016/j.dci.2020.103661] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 02/18/2020] [Accepted: 02/19/2020] [Indexed: 06/10/2023]
Abstract
The diamondback moth, Plutella xylostella, is the first insect to develop resistance to Bacillus thuringiensis (Bt) in the field. To date, little is known about the molecular mechanism of the interaction between Bt and midgut immunity in P. xylostella. Here, we report immune responses in the P. xylostella midgut to Bt strain Bt8010 using a combined approach of transcriptomics and quantitative proteomics. Many genes in the Toll, IMD, JNK and JAK-STAT pathways and antimicrobial peptide genes were activated at 18 h post-infection. In the prophenoloxidase (PPO) cascade, four serpin genes were activated, and the PPO1 gene was suppressed by Bt8010. Inhibition of the two PPO proteins was observed at 18 h post-infection. Feeding Bt8010-infected larvae recombinant PPOs enhanced their survival. These results revealed that the Toll, IMD, JNK and JAK-STAT pathways were triggered and participated in the immune defence of the midgut against Bt8010, while the PPO cascade was inhibited and played an important role in this process.
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Affiliation(s)
- Junhan Lin
- State Key Laboratory of Ecological Pest Control for Fujian/Taiwan Crops and College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China; Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China; Fujian Vocational College of Bioengineering, Fuzhou, China; Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, China; Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, China
| | - Xiao-Qiang Yu
- State Key Laboratory of Ecological Pest Control for Fujian/Taiwan Crops and College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China; Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China; Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, China; Institute of Insect Science and Technology, South China Normal University, Guangzhou, China
| | - Qian Wang
- State Key Laboratory of Ecological Pest Control for Fujian/Taiwan Crops and College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China; Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China; Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, China; Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, China
| | - Xinping Tao
- State Key Laboratory of Ecological Pest Control for Fujian/Taiwan Crops and College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China; Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China; Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, China; Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, China
| | - Jinyang Li
- State Key Laboratory of Ecological Pest Control for Fujian/Taiwan Crops and College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China; Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China; Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, China; Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, China
| | - Shanshan Zhang
- State Key Laboratory of Ecological Pest Control for Fujian/Taiwan Crops and College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China; Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China; Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, China; Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, China
| | - Xiaofeng Xia
- State Key Laboratory of Ecological Pest Control for Fujian/Taiwan Crops and College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China; Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China; Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, China; Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, China.
| | - Minsheng You
- State Key Laboratory of Ecological Pest Control for Fujian/Taiwan Crops and College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China; Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China; Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, China; Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, China.
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10
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Qi L, Qiu X, Yang S, Li R, Wu B, Cao X, He T, Ding X, Xia L, Sun Y. Cry1Ac Protoxin and Its Activated Toxin from Bacillus thuringiensis Act Differentially during the Pathogenic Process. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:5816-5824. [PMID: 32379448 DOI: 10.1021/acs.jafc.0c01172] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Although the new dual model of the Bacillus thuringiensis insecticidal mechamism indicated that both Cry1A protoxin and activated toxin have the potency to kill insects, the difference in the toxic pathways elicited by the protoxin and activated toxin was less understood at the molecular level. Through utilizing the CF-203 cell line derived from the midgut of Choristoneura fumiferana, we found that there existed obvious differences in the binding sites and endocytosis pathways for the two forms of Cry1Ac. In addition, it was revealed that Cry1Ac protoxin existed predominantly in the midgut of Plutella xylostella at the early stage after ingesting Cry1Ac crystals, which brought about obvious damage to the midgut epithelium and exhibited different binding sites on the brush border membrane vesicle compared to the toxin. These findings supported the dual mode of action of B. thuringiensis Cry1A proteins and improved our understanding of the molecular features that contribute to the protoxin toxicity.
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Affiliation(s)
- Lingling Qi
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha 410081, People's Republic of China
| | - Xianfeng Qiu
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha 410081, People's Republic of China
| | - Sisi Yang
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha 410081, People's Republic of China
| | - Ran Li
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha 410081, People's Republic of China
| | - Binbin Wu
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha 410081, People's Republic of China
| | - Xiaomei Cao
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha 410081, People's Republic of China
| | - Ting He
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha 410081, People's Republic of China
| | - Xuezhi Ding
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha 410081, People's Republic of China
| | - Liqiu Xia
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha 410081, People's Republic of China
| | - Yunjun Sun
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha 410081, People's Republic of China
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Zhao XD, Zhang BW, Fu LJ, Li QL, Lin Y, Yu XQ. Possible Insecticidal Mechanism of Cry41-Related Toxin against Myzus persicae by Enhancing Cathepsin B Activity. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:4607-4615. [PMID: 32227950 DOI: 10.1021/acs.jafc.0c01020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cry toxins produced by Bacillus thuringiensis are well known for their high insecticidal activities against Lepidoptera, Diptera, and Coleoptera; however, their activities against Aphididae are very low. Recently, it has been reported that a Cry41-related toxin exhibited moderate activity against the aphid Myzus persicae, and thus, it is highly desirable to uncover its unique mechanism. In this paper, we report that Cathepsin B, calcium-transporting ATPase, and symbiotic bacterial-associated protein ATP-dependent-6-phosphofructokinase were pulled down from the homogenate of M. persicae as unique proteins that possibly bound to Cry41-related toxin. Cathepsin B has been reported to cleave and inactivate antiapoptotic proteins and plays a role in caspase-initiated apoptotic cascades. In this study, Cathepsin B was expressed in Escherichia coli and purified, and in vitro interaction between recombinant Cathepsin B and Cry41-related toxin was demonstrated. Interestingly, we found that addition of Cry41-related toxin obviously enhanced Cathepsin B activity. We propose a model for the mechanism of Cry41-related toxin as follows: Cry41-related toxin enters the aphid cells and enhances Cathepsin B activity, resulting in acceleration of apoptosis of aphid cells.
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Affiliation(s)
- Xiao-Di Zhao
- Fujian Provincial Key Laboratory of Biochemical Technology (Huaqiao University), Department of Bioengineering & Biotechnology, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China
| | - Bin-Wu Zhang
- Fujian Provincial Key Laboratory of Biochemical Technology (Huaqiao University), Department of Bioengineering & Biotechnology, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China
| | - Li-Jun Fu
- Fujian Key Laboratory of Ecology-toxicological Effects & Control for Emerging Contaminants, Putian University, Putian, Fujian 351100, PR China
| | - Qi-Lin Li
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Yi Lin
- Fujian Provincial Key Laboratory of Biochemical Technology (Huaqiao University), Department of Bioengineering & Biotechnology, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China
| | - Xiao-Qiang Yu
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou 510631, China
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12
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Hu X, Chen H, Xu J, Zhao G, Huang X, Liu J, Batool K, Wu C, Wu S, Huang E, Wu J, Chowhury M, Zhang J, Guan X, Yu XQ, Zhang L. Function of Aedes aegypti galectin-6 in modulation of Cry11Aa toxicity. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2020; 162:96-104. [PMID: 31836060 DOI: 10.1016/j.pestbp.2019.09.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 07/09/2019] [Accepted: 09/18/2019] [Indexed: 06/10/2023]
Abstract
Galectins are a family of β-galactoside binding proteins, and insect galectins play a role in immune responses and may also affect Cry toxin activity. In this study, we aimed to further understand the function and molecular mechanism of Aedes aegypti galectin-6 in modulation of Cry11Aa toxicity. A. aegypti galectin-6 was cloned, and the recombinant galectin-6 was expressed and purified. Bioassays indicated that galectin-6 could reduce the toxicity of Cry11Aa, protecting A. aegypti larvae. To determine interactions among galectin-6, Cry11Aa and putative toxin receptors, Octet Red System, western blotting, far-western blotting and ELISA assays were performed. Octet Red System showed that galectin-6 bound to BBMVs of A. aegypti larvae with lower affinity than that of Cry11Aa. Western blotting and far-western blotting analyses demonstrated that galectin-6 bound to A. aegypti ALP1 and APN2 as well as to BBMVs, consistent with the results of ELISA and protein docking simulations. However, galectin-6 did not bind to Cadherin in far-western blotting or ELISA assay, though the protein docking simulations suggested their binding potential. These findings support the conclusion that galectin-6 may block Cry11Aa from binding to ALP1 and APN2 due to structural similarity, which might decrease the mosquitocidal toxicity of Cry11Aa.
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Affiliation(s)
- Xiaohua Hu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Hong Chen
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Jin Xu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Guohui Zhao
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xianhui Huang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Jiannan Liu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Khadija Batool
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Chenxu Wu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Songqing Wu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Enjiong Huang
- Fujian International Travel Healthcare Center, Fuzhou 350001, China
| | - Juan Wu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Munmun Chowhury
- Division of Cell Biology and Biophysics, University of Missouri, Kansas City, MO 64110, USA
| | - Jie Zhang
- Division of Cell Biology and Biophysics, University of Missouri, Kansas City, MO 64110, USA
| | - Xiong Guan
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xiao-Qiang Yu
- Division of Cell Biology and Biophysics, University of Missouri, Kansas City, MO 64110, USA.
| | - Lingling Zhang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Division of Cell Biology and Biophysics, University of Missouri, Kansas City, MO 64110, USA.
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13
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Synthesis and Characterization of Cry2Ab-AVM Bioconjugate: Enhanced Affinity to Binding Proteins and Insecticidal Activity. Toxins (Basel) 2019; 11:toxins11090497. [PMID: 31461921 PMCID: PMC6783867 DOI: 10.3390/toxins11090497] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 08/15/2019] [Accepted: 08/15/2019] [Indexed: 12/23/2022] Open
Abstract
Bacillus thuringiensis insecticidal proteins (Bt toxins) have been widely used in crops for agricultural pest management and to reduce the use of chemical insecticides. Here, we have engineered Bt toxin Cry2Ab30 and bioconjugated it with 4"-O-succinyl avermectin (AVM) to synthesize Cry2Ab-AVM bioconjugate. It was found that Cry2Ab-AVM showed higher insecticidal activity against Plutella xylostella, up to 154.4 times compared to Cry2Ab30. The binding results showed that Cry2Ab-AVM binds to the cadherin-like binding protein fragments, the 10th and 11th cadherin repeat domains in the P. xylostella cadherin (PxCR10-11), with a much higher affinity (dissociation equilibrium constant KD = 3.44 nM) than Cry2Ab30 (KD = 28.7 nM). Molecular docking suggested that the macrolide lactone group of Cry2Ab-AVM ligand docking into the PxCR10-11 is a potential mechanism to enhance the binding affinity of Cry2Ab-AVM to PxCR10-11. These findings offer scope for the engineering of Bt toxins by bioconjugation for improved pest management.
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Qiu Y, Li P, Liu B, Liu Y, Wang Y, Tao T, Xu J, Hammock BD, Liu X, Guan R, Zhang C. Phage-displayed nanobody based double antibody sandwich chemiluminescent immunoassay for the detection of Cry2A toxin in cereals. FOOD AGR IMMUNOL 2019. [DOI: 10.1080/09540105.2019.1642307] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Affiliation(s)
- Yulou Qiu
- Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, People’s Republic of China
- Zhejiang Proceincial Key Laboratory of Biometrology and Inspection and Quarantine, China Jiliang University, Hangzhou, People’s Republic of China
| | - Pan Li
- Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, People’s Republic of China
| | - Beibei Liu
- Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, People’s Republic of China
| | - Yuan Liu
- Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, People’s Republic of China
| | - Yulong Wang
- Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, People’s Republic of China
| | - Tingting Tao
- Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, People’s Republic of China
| | - Junli Xu
- Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, People’s Republic of China
| | - Bruce D. Hammock
- Laboratory of Pesticide and Nematology Biotechnology, Department of Entomology, University of California, Davis, CA, USA
| | - Xianjin Liu
- Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, People’s Republic of China
| | - Rongfa Guan
- Zhejiang Proceincial Key Laboratory of Biometrology and Inspection and Quarantine, China Jiliang University, Hangzhou, People’s Republic of China
| | - Cunzheng Zhang
- Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, People’s Republic of China
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, People’s Republic of China
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15
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Zhao GH, Liu JN, Hu XH, Batool K, Jin L, Wu CX, Wu J, Chen H, Jiang XY, Yang ZH, Huang XH, Huang EJ, Yu XQ, Guan X, Zhang LL. Cloning, expression and activity of ATP-binding protein in Bacillus thuringiensis toxicity modulation against Aedes aegypti. Parasit Vectors 2019; 12:319. [PMID: 31238963 PMCID: PMC6593554 DOI: 10.1186/s13071-019-3560-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Accepted: 06/09/2019] [Indexed: 11/17/2022] Open
Abstract
Background Bacillus thuringiensis israelensis (Bti) is a widely used mosquitocidal microbial pesticide due to its high toxicity. ATP-binding proteins (ABP) are prevalently detected in insects and are related to reaction against Bti toxins. However, the function of ABP in mosquito biocontrol is little known, especially in Aedes aegypti. Therefore, this study aimed to clarify the function of ABP in Ae. aegypti against Bti toxin. Results Aedes aegypti ABP (GenBank: XM_001661856.2) was cloned, expressed and purified in this study. Far-western blotting and ELISA were also carried out to confirm the interaction between ABP and Cry11Aa. A bioassay of Cry11Aa was performed both in the presence and absence of ABP, which showed that the mortality of Ae. aegypti is increased with an increase in ABP. Conclusions Our results suggest that ABP in Ae. aegypti can modulate the toxicity of Cry11Aa toxin to mosquitoes by binding to Bti toxin. This could not only enrich the mechanism of Bt toxin, but also provide more data for the biocontrol of this transmission vector.
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Affiliation(s)
- Guo-Hui Zhao
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Jian-Nan Liu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Xiao-Hua Hu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Khadija Batool
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Liang Jin
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Chen-Xu Wu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Juan Wu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Hong Chen
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Xiao-Yan Jiang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Zhao-Hui Yang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Xian-Hui Huang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - En-Jiong Huang
- Fujian International Travel HealthCare Center, Fuzhou, 350001, China
| | - Xiao-Qiang Yu
- Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology & School of Life Sciences, South China Normal University, Guangzhou, 510631, China.,Division of Cell Biology and Biophysics, University of Missouri-Kansas City, Kansas City, MO, 64110, USA
| | - Xiong Guan
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Ling-Ling Zhang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & School of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
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16
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Gupta MK, Vadde R, Gouda G, Donde R, Kumar J, Behera L. Computational approach to understand molecular mechanism involved in BPH resistance in Bt- rice plant. J Mol Graph Model 2019; 88:209-220. [PMID: 30743158 DOI: 10.1016/j.jmgm.2019.01.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 01/05/2019] [Accepted: 01/30/2019] [Indexed: 12/13/2022]
Abstract
In silico approach was utilised to identify differentially expressed key hub genes during BPH infestation on Bt rice plant, under laboratory conditions. Re-analysis of GSE74745 data with in-house R scripts and STRING database reveals that only 5 key hub genes, namely Os05g0176100, Os06g0683200, Os07g0208500, Os07g0252400 and Os07g0424400, belonging to cellulose synthase family, are differentially expressed and have confidence score ≥0.9 among themselves. Conserve domain analysis of all proteins encoded via these 5 key hub genes reveals that they have a common cellulose synthase domain, in which "Plant-Conserved Region" (PCR) is highly conserved. After binding with other domains of cellulose synthase proteins or other accessory proteins, like sucrose synthase, PCR serves as a metabolic channel to deliver UDP-Glucose, which is the main substrate for cellulose synthesis, into the active site of cellulose synthase and initiate cellulose synthesis. Simulation study of recently solved topological model of PCR [PDB ID: 5JNP] and molecular docking studies of PCR with UDP-glucose reveals that, during BPH infestation, in nearby phloem tissue where BPH suck sap, there is an increase interaction of UDP-glucose with PCR and other accessory proteins which in turn increases both the stability of PCR and the production of cellulose, finally causing callose deposition at that site and hence causing longer nymphal developmental period and lower fertility of BPH infested on Bt rice. In near future, these differentially identified 5 hub genes could be possible targets for controlling BPH infestation in rice plant under field conditions and increasing rice yield globally.
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Affiliation(s)
- Manoj Kumar Gupta
- Department of Biotechnology & Bioinformatics, Yogi Vemana University, Kadapa, 516003, Andhra Pradesh, India
| | - Ramakrishna Vadde
- Department of Biotechnology & Bioinformatics, Yogi Vemana University, Kadapa, 516003, Andhra Pradesh, India
| | - Gayatri Gouda
- ICAR-National Rice Research Institute, Cuttack, Odisha, 753 006, India
| | - Ravindra Donde
- ICAR-National Rice Research Institute, Cuttack, Odisha, 753 006, India
| | - Jitendra Kumar
- ICAR-National Rice Research Institute, Cuttack, Odisha, 753 006, India
| | - Lambodar Behera
- ICAR-National Rice Research Institute, Cuttack, Odisha, 753 006, India.
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Qiu X, Lu X, Ren X, Li R, Wu B, Yang S, Qi L, Mo X, Ding X, Xia L, Sun Y. Solubility enhancement of Cry2Aa crystal through carboxy-terminal extension and synergism between the chimeric protein and Cry1Ac. Appl Microbiol Biotechnol 2019; 103:2243-2250. [PMID: 30617818 DOI: 10.1007/s00253-018-09606-w] [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: 11/14/2018] [Revised: 12/26/2018] [Accepted: 12/28/2018] [Indexed: 11/26/2022]
Abstract
It was reported that the highly conserved C-terminal region of Bacillus thuringiensis Cry1A protoxins was very important for parasporal crystal formation and solubility feature in alkaline environment. In order to improve the solubilization efficiency of Cry2Aa crystal, the coding sequences of Cry2Aa protein and the C-terminal half of Cry1Ac were fused seamlessly through Red/ET homologous recombination and expressed in an acrystalliferous B. thuringiensis strain under the control of the cry1Ac promoter and terminator. Microscopic observation revealed that the recombinant strain containing the chimeric gene cry2Aa-1Ac produced distinct parasporal inclusion with semispherical to approximately cuboidal shape during sporulation. SDS-PAGE analysis showed that this strain expressed stable 130-kDa Cry2Aa-1Ac chimeric protein, which was confirmed to be the correctly expressed product by LC-MS/MS. The chimeric protein inclusion could be effectively dissolved at pH 10.5 and activated by trypsin like the parental Cry1Ac crystal. While, the parental Cry2Aa crystal exhibited very low solubility under this condition. Bioassays against third-instar larvae of Helicoverpa armigera proved that the chimeric protein was more toxic than Cry2Aa. Additionally, synergistic effect was clearly detected between the chimeric protein and Cry1Ac against H. armigera, while there was only additive effect for the combination of wild Cry2Aa and Cry1Ac. These results indicated that the developed chimeric protein might serve as a potent insecticidal toxin used in the field against lepidopteran pests.
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Affiliation(s)
- Xianfeng Qiu
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Xiuqing Lu
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Xiaomeng Ren
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Ran Li
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Binbin Wu
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Sisi Yang
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Lingling Qi
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Xiangtao Mo
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Xuezhi Ding
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Liqiu Xia
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Yunjun Sun
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha, 410081, People's Republic of China.
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18
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Da Silva IHS, Goméz I, Sánchez J, Martínez de Castro DL, Valicente FH, Soberón M, Polanczyk RA, Bravo A. Identification of midgut membrane proteins from different instars of Helicoverpa armigera (Lepidoptera: Noctuidae) that bind to Cry1Ac toxin. PLoS One 2018; 13:e0207789. [PMID: 30521540 PMCID: PMC6283627 DOI: 10.1371/journal.pone.0207789] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 11/06/2018] [Indexed: 11/21/2022] Open
Abstract
Helicoverpa armigera is a polyphagous pest sensitive to Cry1Ac protein from Bacillus thuringiensis (Bt). The susceptibility of the different larval instars of H. armigera to Cry1Ac protoxin showed a significant 45-fold reduction in late instars compared to early instars. A possible hypothesis is that gut surface proteins that bind to Cry1Ac differ in both instars, although higher Cry toxin degradation in late instars could also explain the observed differences in susceptibility. Here we compared the Cry1Ac-binding proteins from second and fifth instars by pull-down assays and liquid chromatography coupled to mass spectrometry analysis (LC-MS/MS). The data show differential protein interaction patterns of Cry1Ac in the two instars analyzed. Alkaline phosphatase, and other membrane proteins, such as prohibitin and an anion selective channel protein were identified only in the second instar, suggesting that these proteins may be involved in the higher toxicity of Cry1Ac in early instars of H. armigera. Eleven Cry1Ac binindg proteins were identified exclusively in late instar larvae, like different proteases such as trypsin-like protease, azurocidin-like proteinase, and carboxypeptidase. Different aminopeptidase N isofroms were identified in both instar larvae. We compared the Cry1Ac protoxin degradation using midgut juice from late and early instars, showing that the midgut juice from late instars is more efficient to degrade Cry1Ac protoxin than that of early instars, suggesting that increased proteolytic activity on the toxin could also explain the low Cry1Ac toxicity in late instars.
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Affiliation(s)
- Igor Henrique Sena Da Silva
- Departamento de Fitossanidade, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, Brazil
| | - Isabel Goméz
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Morelos, Mexico
| | - Jorge Sánchez
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Morelos, Mexico
| | | | | | - Mario Soberón
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Morelos, Mexico
| | - Ricardo Antonio Polanczyk
- Departamento de Fitossanidade, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, Brazil
| | - Alejandra Bravo
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Morelos, Mexico
- * E-mail:
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19
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Rao W, Zhan Y, Chen S, Xu Z, Huang T, Hong X, Zheng Y, Pan X, Guan X. Flowerlike Mg(OH) 2 Cross-Nanosheets for Controlling Cry1Ac Protein Loss: Evaluation of Insecticidal Activity and Biosecurity. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:3651-3657. [PMID: 29584428 DOI: 10.1021/acs.jafc.8b00575] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Bacillus thuringiensis (Bt) can produce Cry proteins during the sporulation phase, and Cry protein is effective against lepidopteran, coleopteran, and dipteran insects and nematodes. However, Cry protein tends to be discharged into soil and nontarget plants through rainwater runoff, leading to reduced effective period toward target insects. In the present study, nano-Mg(OH)2 (magnesium hydroxide nanoparticles, MHNPs) were synthesized to control the loss of Cry1Ac protein and deliver protein to Helicoverpa armigera (Lepidoptera: Noctuidae). The results showed that Cry1Ac protein could be loaded onto MHNPs through electrostatic adsorption, and both MHNPs and Cry protein were stable during the adsorption process. Meanwhile, the Cry1Ac-loaded MHNPs could remain on the surface of cotton leaves, resulting in enhanced adhesion of Cry1Ac protein by 59.50% and increased pest mortality by 75.00%. Additionally, MHNPs could be slowly decomposed by acid medium and MHNPs showed no obvious influence on cotton, Bt, Escherichia coli, and H. armigera. Therefore, MHNPs could serve as an efficient nanocarrier for delivery of Cry1Ac protein and be used as a potential adjuvant for biopesticide in agricultural applications.
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Affiliation(s)
- Wenhua Rao
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Lab of Biopesticide and Chemical Biology, Ministry of Education , Fujian Agriculture and Forestry University , Fuzhou , Fujian 350002 , People's Republic of China
| | - Yating Zhan
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Lab of Biopesticide and Chemical Biology, Ministry of Education , Fujian Agriculture and Forestry University , Fuzhou , Fujian 350002 , People's Republic of China
| | - Saili Chen
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Lab of Biopesticide and Chemical Biology, Ministry of Education , Fujian Agriculture and Forestry University , Fuzhou , Fujian 350002 , People's Republic of China
| | - Zhangyan Xu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Lab of Biopesticide and Chemical Biology, Ministry of Education , Fujian Agriculture and Forestry University , Fuzhou , Fujian 350002 , People's Republic of China
| | - Tengzhou Huang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Lab of Biopesticide and Chemical Biology, Ministry of Education , Fujian Agriculture and Forestry University , Fuzhou , Fujian 350002 , People's Republic of China
| | - Xianxian Hong
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Lab of Biopesticide and Chemical Biology, Ministry of Education , Fujian Agriculture and Forestry University , Fuzhou , Fujian 350002 , People's Republic of China
| | - Yilin Zheng
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Lab of Biopesticide and Chemical Biology, Ministry of Education , Fujian Agriculture and Forestry University , Fuzhou , Fujian 350002 , People's Republic of China
| | - Xiaohong Pan
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Lab of Biopesticide and Chemical Biology, Ministry of Education , Fujian Agriculture and Forestry University , Fuzhou , Fujian 350002 , People's Republic of China
| | - Xiong Guan
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Lab of Biopesticide and Chemical Biology, Ministry of Education , Fujian Agriculture and Forestry University , Fuzhou , Fujian 350002 , People's Republic of China
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20
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Qiu Y, Li P, Dong S, Zhang X, Yang Q, Wang Y, Ge J, Hammock BD, Zhang C, Liu X. Phage-Mediated Competitive Chemiluminescent Immunoassay for Detecting Cry1Ab Toxin by Using an Anti-Idiotypic Camel Nanobody. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:950-956. [PMID: 29293334 PMCID: PMC7314401 DOI: 10.1021/acs.jafc.7b04923] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Cry toxins have been widely used in genetically modified organisms for pest control, raising public concern regarding their effects on the natural environment and food safety. In this work, a phage-mediated competitive chemiluminescent immunoassay (c-CLIA) was developed for determination of Cry1Ab toxin using anti-idiotypic camel nanobodies. By extracting RNA from camels' peripheral blood lymphocytes, a naive phage-displayed nanobody library was established. Using anti-Cry1Ab toxin monoclonal antibodies (mAbs) against the library for anti-idiotypic antibody screening, four anti-idiotypic nanobodies were selected and confirmed to be specific for anti-Cry1Ab mAb binding. Thereafter, a c-CLIA was developed for detection of Cry1Ab toxin based on anti-idiotypic camel nanobodies and employed for sample testing. The results revealed a half-inhibition concentration of developed assay to be 42.68 ± 2.54 ng/mL, in the linear range of 10.49-307.1 ng/mL. The established method is highly specific for Cry1Ab recognition, with negligible cross-reactivity for other Cry toxins. For spiked cereal samples, the recoveries of Cry1Ab toxin ranged from 77.4% to 127%, with coefficient of variation of less than 9%. This study demonstrated that the competitive format based on phage-displayed anti-idiotypic nanobodies can provide an alternative strategy for Cry toxin detection.
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Affiliation(s)
- Yulou Qiu
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Pan Li
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Sa Dong
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Xiaoshuai Zhang
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Qianru Yang
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Yulong Wang
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Jing Ge
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Bruce D. Hammock
- Laboratory of Pesticide & Biotechnology, Department of Entomology, University of California, Davis, CA 95616, USA
| | - Cunzheng Zhang
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- Corresponding author at: Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China. Tel.:+86-25-8439 0401; (C. Zhang)
| | - Xianjin Liu
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
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21
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Zhang L, Zhao G, Hu X, Liu J, Li M, Batool K, Chen M, Wang J, Xu J, Huang T, Pan X, Xu L, Yu XQ, Guan X. Cry11Aa Interacts with the ATP-Binding Protein from Culex quinquefasciatus To Improve the Toxicity. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:10884-10890. [PMID: 29215274 DOI: 10.1021/acs.jafc.7b04427] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Cry11Aa displays high toxicity to the larvae of several mosquito species, including Aedes, Culex, and Anopheles. To study its binding characterization against Culex quinquefasciatus, Cry11Aa was purified and western blot results showed that Cry11Aa could bind successfully to the brush border membrane vesicles. To identify Cry11Aa-binding proteins in C. quinquefasciatus, a biotin-based protein pull-down experiment was performed and seven Cry11Aa-binding proteins were isolated from the midgut of C. quinquefasciatus larvae. Analysis of liquid chromatography-tandem mass spectrometry showed that one of the Cry11Aa-binding proteins is the ATP-binding domain 1 family member B. To investigate its binding property and effect on the toxicity of Cry11Aa, western blot, far-western blot, enzyme-linked immunosorbent assay, and bioassays of Cry11Aa in the presence and absence of the recombinant ATP-binding protein were performed. Our results showed that the ATP-binding protein interacted with Cry11Aa and increased the toxicity of Cry11Aa against C. quinquefasciatus. Our study suggests that midgut proteins other than the toxin receptors may modulate the toxicity of Cry toxins against mosquitoes.
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Affiliation(s)
- Lingling Zhang
- Division of Cell Biology and Biophysics, University of Missouri-Kansas City , Kansas City, Missouri 64110, United States
| | | | | | | | | | | | | | | | | | | | | | | | - Xiao-Qiang Yu
- Division of Cell Biology and Biophysics, University of Missouri-Kansas City , Kansas City, Missouri 64110, United States
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22
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Pan X, Xu Z, Li L, Shao E, Chen S, Huang T, Chen Z, Rao W, Huang T, Zhang L, Wu S, Guan X. Adsorption of Insecticidal Crystal Protein Cry11Aa onto Nano-Mg(OH) 2: Effects on Bioactivity and Anti-Ultraviolet Ability. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:9428-9434. [PMID: 29019656 DOI: 10.1021/acs.jafc.7b03410] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The traditional Bacillus thuringiensis (Bt) formulations for field applications are not resistant to harsh environmental conditions. Hence, the active ingredients of the Bt bioinsecticides could degrade quickly and has low anti-ultraviolet ability in the field, which significantly limits its practical application. In the present study, we developed an efficient and stable delivery system for Bt Cry11Aa toxins. We coated Cry11Aa proteins with Mg(OH)2 nanoparticles (MHNPs), and then assessed the effects of MHNPs on bioactivity and anti-ultraviolet ability of the Cry11Aa proteins. Our results indicated that MHNPs, like "coating clothes", could effectively protect the Cry protein and enhance the insecticidal bioactivity after UV radiation (the degradation rate was decreased from 64.29% to 16.67%). In addtion, MHNPs could improve the proteolysis of Cry11Aa in the midgut and aggravate the damage of the Cry protein to the gut epithelial cells, leading to increased insecticidal activity against Culex quinquefasciatus. Our results revealed that MHNPs, as an excellent nanocarrier, could substantially improve the insecticidal bioactivity and anti-ultraviolet ability of Cry11Aa.
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Affiliation(s)
- Xiaohong Pan
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & College of Plant Protection & College of Resources and Environmental Sciences & College of Life Sciences & Forestry College, Fujian Agriculture and Forestry University , Fuzhou, Fujian 350002, P. R. China
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests , Fuzhou, Fujian 350002, P. R. China
| | - Zhangyan Xu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & College of Plant Protection & College of Resources and Environmental Sciences & College of Life Sciences & Forestry College, Fujian Agriculture and Forestry University , Fuzhou, Fujian 350002, P. R. China
| | - Lan Li
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & College of Plant Protection & College of Resources and Environmental Sciences & College of Life Sciences & Forestry College, Fujian Agriculture and Forestry University , Fuzhou, Fujian 350002, P. R. China
| | - Enshi Shao
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & College of Plant Protection & College of Resources and Environmental Sciences & College of Life Sciences & Forestry College, Fujian Agriculture and Forestry University , Fuzhou, Fujian 350002, P. R. China
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests , Fuzhou, Fujian 350002, P. R. China
| | - Saili Chen
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & College of Plant Protection & College of Resources and Environmental Sciences & College of Life Sciences & Forestry College, Fujian Agriculture and Forestry University , Fuzhou, Fujian 350002, P. R. China
| | - Tengzhou Huang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & College of Plant Protection & College of Resources and Environmental Sciences & College of Life Sciences & Forestry College, Fujian Agriculture and Forestry University , Fuzhou, Fujian 350002, P. R. China
| | - Zhi Chen
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & College of Plant Protection & College of Resources and Environmental Sciences & College of Life Sciences & Forestry College, Fujian Agriculture and Forestry University , Fuzhou, Fujian 350002, P. R. China
| | - Wenhua Rao
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & College of Plant Protection & College of Resources and Environmental Sciences & College of Life Sciences & Forestry College, Fujian Agriculture and Forestry University , Fuzhou, Fujian 350002, P. R. China
| | - Tianpei Huang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & College of Plant Protection & College of Resources and Environmental Sciences & College of Life Sciences & Forestry College, Fujian Agriculture and Forestry University , Fuzhou, Fujian 350002, P. R. China
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests , Fuzhou, Fujian 350002, P. R. China
| | - Lingling Zhang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & College of Plant Protection & College of Resources and Environmental Sciences & College of Life Sciences & Forestry College, Fujian Agriculture and Forestry University , Fuzhou, Fujian 350002, P. R. China
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests , Fuzhou, Fujian 350002, P. R. China
| | - Songqing Wu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & College of Plant Protection & College of Resources and Environmental Sciences & College of Life Sciences & Forestry College, Fujian Agriculture and Forestry University , Fuzhou, Fujian 350002, P. R. China
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests , Fuzhou, Fujian 350002, P. R. China
| | - Xiong Guan
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & College of Plant Protection & College of Resources and Environmental Sciences & College of Life Sciences & Forestry College, Fujian Agriculture and Forestry University , Fuzhou, Fujian 350002, P. R. China
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests , Fuzhou, Fujian 350002, P. R. China
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23
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Li J, Ma Y, Yuan W, Xiao Y, Liu C, Wang J, Peng J, Peng R, Soberón M, Bravo A, Yang Y, Liu K. FOXA transcriptional factor modulates insect susceptibility to Bacillus thuringiensis Cry1Ac toxin by regulating the expression of toxin-receptor ABCC2 and ABCC3 genes. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2017; 88:1-11. [PMID: 28736301 DOI: 10.1016/j.ibmb.2017.07.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 07/19/2017] [Indexed: 06/07/2023]
Abstract
Cry toxins produced by Bacillus thuringiensis (Bt) are insecticidal proteins widely used in insect control. Recently, it was shown that ATP-binding cassette transporter proteins (ABC) such as ABCC2, ABCC3, ABCG1 and ABCA2 are implicated in the insecticidal action of Cry toxins as putative receptors. However, the transcriptional regulators involved in the expression of ABC transporter genes remain unknown. Sequence analysis of promoter regions of ABCC2 gene from Helicoverpa armigera and ABCC3 gene from Spodoptera litura Sl-HP cultured cells, revealed the potential participation of Forkhead box protein A (FOXA), a transcription factor that regulates the expression of genes through remodeling chromatin. To determine if FOXA was involved in regulating expression of ABCC2 and ABCC3 genes, the expression of FOXA, ABCC2 and ABCC3 was compared in Sl-HP cells that are sensitive to Cry1Ac toxin with those in S. frugiperda Sf9 cells that are not sensitive to the toxin. Expression levels of those genes were significantly higher in Sl-HP than in Sf9 cells. Transient expression of FOXA in Sf9 cells activated ABCC2 and ABCC3 transcription, which directly correlated with enhanced Cry1Ac-susceptibility in these cells. Silencing of FOXA gene expression by RNAi in H. armigera larvae resulted in a decreased expression of ABCC2 and ABCC3 without affecting expression of other Cry toxin receptor genes such as alkaline phosphatase, aminopeptidase or cadherin. Silencing of FOXA gene expression also resulted in a Cry1Ac-tolerant phenotype since lower mortality and higher pupation rate were observed in diet containing Cry1Ac protoxin in comparison with the control group. These results demonstrate that FOXA up-regulates expression of the Cry1Ac-toxin receptor ABCC2 and ABCC3 genes, and that lower FOXA expression correlates with tolerance to Cry toxin in cell lines and in lepidopteran larvae.
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Affiliation(s)
- Jianghuai Li
- Institute of Entomology, School of Life Sciences, Central China Normal University, Wuhan 430079, China
| | - Yuemin Ma
- Institute of Entomology, School of Life Sciences, Central China Normal University, Wuhan 430079, China
| | - Wanli Yuan
- Institute of Entomology, School of Life Sciences, Central China Normal University, Wuhan 430079, China
| | - Yutao Xiao
- Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
| | - Chenxi Liu
- State Key Laboratory for Biology of Plant Disease and Insect Pests, Chinese Academy of Agricultural Sciences, West Yuanmingyuan Road, Beijing 100193, China
| | - Jia Wang
- Institute of Entomology, School of Life Sciences, Central China Normal University, Wuhan 430079, China
| | - Jianxin Peng
- Institute of Entomology, School of Life Sciences, Central China Normal University, Wuhan 430079, China
| | - Rong Peng
- Institute of Entomology, School of Life Sciences, Central China Normal University, Wuhan 430079, China
| | - Mario Soberón
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Apdo. Postal 510-3, Cuernavaca 62250, Morelos, Mexico
| | - Alejandra Bravo
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Apdo. Postal 510-3, Cuernavaca 62250, Morelos, Mexico.
| | - Yongbo Yang
- Institute of Entomology, School of Life Sciences, Central China Normal University, Wuhan 430079, China.
| | - Kaiyu Liu
- Institute of Entomology, School of Life Sciences, Central China Normal University, Wuhan 430079, China.
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24
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Chen WB, Lu GQ, Cheng HM, Liu CX, Xiao YT, Xu C, Shen ZC, Wu KM. Transgenic cotton coexpressing Vip3A and Cry1Ac has a broad insecticidal spectrum against lepidopteran pests. J Invertebr Pathol 2017; 149:59-65. [PMID: 28782511 DOI: 10.1016/j.jip.2017.08.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 06/25/2017] [Accepted: 08/01/2017] [Indexed: 01/02/2023]
Abstract
Although farmers in China have grown transgenic Bt-Cry1Ac cotton to resist the major pest Helicoverpa armigera since 1997 with great success, many secondary lepidopteran pests that are tolerant to Cry1Ac are now reported to cause considerable economic damage. Vip3AcAa, a chimeric protein with the N-terminal part of Vip3Ac and the C-terminal part of Vip3Aa, has a broad insecticidal spectrum against lepidopteran pests and has no cross resistance to Cry1Ac. In the present study, we tested insecticidal activities of Vip3AcAa against Spodoptera litura, Spodoptera exigua, and Agrotis ipsilon, which are relatively tolerant to Cry1Ac proteins. The bioassay results showed that insecticidal activities of Vip3AcAa against these three pests are superior to Cry1Ac, and after an activation pretreatment, Vip3AcAa retained insecticidal activity against S. litura, S. exigua and A. ipsilon that was similar to the unprocessed protein. The putative receptor for this chimeric protein in the brush border membrane vesicle (BBMV) in the three pests was also identified using biotinylated Vip3AcAa toxin. To broaden Bt cotton activity against a wider spectrum of pests, we introduced the vip3AcAa and cry1Ac genes into cotton. Larval mortality rates for S. litura, A. ipsilon and S. exigua that had fed on this new cotton increased significantly compared with larvae fed on non-Bt cotton and Bt-Cry1Ac cotton in a laboratory experiment. These results suggested that the Vip3AcAa protein is an excellent option for a "pyramid" strategy for integrated pest management in China.
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Affiliation(s)
- Wen-Bo Chen
- Fujian Provincial Key Laboratory of Insect Ecology, Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China; The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Guo-Qing Lu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Hong-Mei Cheng
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Chen-Xi Liu
- The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Yu-Tao Xiao
- The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Chao Xu
- Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, Zhejiang, China.
| | - Zhi-Cheng Shen
- Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, Zhejiang, China.
| | - Kong-Ming Wu
- The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
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