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Application of the Scorpion Neurotoxin AaIT against Insect Pests. Int J Mol Sci 2019; 20:ijms20143467. [PMID: 31311095 PMCID: PMC6678123 DOI: 10.3390/ijms20143467] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 07/07/2019] [Accepted: 07/10/2019] [Indexed: 12/25/2022] Open
Abstract
Androctonus australis Hector insect toxin (AaIT), an insect-selective toxin, was identified in the venom of the scorpion Androctonus australis. The exclusive and specific target of the toxin is the voltage-gated sodium channels of the insect, resulting in fast excitatory paralysis and even death. Because of its strict toxic selectivity and high bioactivity, AaIT has been widely used in experiments exploring pest bio-control. Recombinant expression of AaIT in a baculovirus or a fungus can increase their virulence to insect pests and diseases vectors. Likewise, transgenic plants expressing AaIT have notable anti-insect activity. AaIT is an efficient toxin and has great potential to be used in the development of commercial insecticides.
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Ribeiro BM, Dos Santos ER, Trentin LB, da Silva LA, de Melo FL, Kitajima EW, Ardisson-Araújo DMP. A Nymphalid-Infecting Group I Alphabaculovirus Isolated from the Major Passion Fruit Caterpillar Pest Dione juno juno (Lepidoptera: Nymphalidae). Viruses 2019; 11:v11070602. [PMID: 31277203 PMCID: PMC6669553 DOI: 10.3390/v11070602] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 06/14/2019] [Accepted: 06/15/2019] [Indexed: 11/30/2022] Open
Abstract
Baculoviruses are capable of infecting a wide diversity of insect pests. In the 1990s, the Dione juno nucleopolyhedrovirus (DijuNPV) was isolated from larvae of the major passionfruit defoliator pest Dione juno juno (Nymphalidae) and described at ultrastructural and pathological levels. In this study, the complete genome sequence of DijuNPV was determined and analyzed. The circular genome presents 122,075 bp with a G + C content of 50.9%. DijuNPV is the first alphabaculovirus completely sequenced that was isolated from a nymphalid host and may represent a divergent species. It appeared closely related to Orgyia pseudotsugata multiple nucleopolyhedrovirus (OpMNPV) and other Choristoneura-isolated group I alphabaculoviruses. We annotated 153 open reading frames (ORFs), including a set of 38 core genes, 26 ORFs identified as present in lepidopteran baculoviruses, 17 ORFs unique in baculovirus, and several auxiliary genes (e.g., bro, cathepsin, chitinase, iap-1, iap-2, and thymidylate kinase). The thymidylate kinase (tmk) gene was present fused to a dUTPase (dut) gene in other baculovirus genomes. DijuNPV likely lost the dut portion together with the iap-3 homolog. Overall, the genome sequencing of novel alphabaculoviruses enables a wide understanding of baculovirus evolution.
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Affiliation(s)
- Bergmann Morais Ribeiro
- Laboratory of Baculovirus, Cell Biology Department, University of Brasilia, Brasilia, DF 70910-900, Brazil
| | - Ethiane Rozo Dos Santos
- Laboratory of Insect Virology, Department of Biochemistry and Molecular Biology, Federal University of Santa Maria, Santa Maria, RS 97105-900, Brazil
| | - Luana Beló Trentin
- Laboratory of Insect Virology, Department of Biochemistry and Molecular Biology, Federal University of Santa Maria, Santa Maria, RS 97105-900, Brazil
| | - Leonardo Assis da Silva
- Laboratory of Baculovirus, Cell Biology Department, University of Brasilia, Brasilia, DF 70910-900, Brazil
| | - Fernando Lucas de Melo
- Laboratory of Baculovirus, Cell Biology Department, University of Brasilia, Brasilia, DF 70910-900, Brazil
| | - Elliot Watanabe Kitajima
- Escola Superior de Agricultura Luiz de Queiroz, University of São Paulo, Piracicaba, SP 13418900, Brazil
| | - Daniel M P Ardisson-Araújo
- Laboratory of Insect Virology, Department of Biochemistry and Molecular Biology, Federal University of Santa Maria, Santa Maria, RS 97105-900, Brazil.
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Harrison RL, Rowley DL, Popham HJR. A Novel Alphabaculovirus from the Soybean Looper, Chrysodeixis includens, that Produces Tetrahedral Occlusion Bodies and Encodes Two Copies of he65. Viruses 2019; 11:E579. [PMID: 31247912 PMCID: PMC6669638 DOI: 10.3390/v11070579] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 06/18/2019] [Accepted: 06/21/2019] [Indexed: 11/29/2022] Open
Abstract
Isolates of the alphabaculovirus species, Chrysodeixis includens nucleopolyhedrovirus, have been identified that produce polyhedral occlusion bodies and infect larvae of the soybean looper, Chrysodeixis includens. In this study, we report the discovery and characterization of a novel C. includens-infecting alphabaculovirus, Chrysodeixis includens nucleopolyhedrovirus #1 (ChinNPV#1), that produces tetrahedral occlusion bodies. In bioassays against C. includens larvae, ChinNPV #1 exhibited a degree of pathogenicity that was similar to that of other ChinNPV isolates, but killed larvae more slowly. The host range of ChinNPV#1 was found to be very narrow, with no indication of infection occurring in larvae of Trichoplusia ni and six other noctuid species. The ChinNPV#1 genome sequence was determined to be 130,540 bp, with 126 open reading frames (ORFs) annotated but containing no homologous repeat (hr) regions. Phylogenetic analysis placed ChinNPV#1 in a clade with other Group II alphabaculoviruses from hosts of lepidopteran subfamily Plusiinae, including Chrysodeixis chalcites nucleopolyhedrovirus and Trichoplusia ni single nucleopolyhedrovirus. A unique feature of the ChinNPV#1 genome was the presence of two full-length copies of the he65 ORF. The results indicate that ChinNPV#1 is related to, but distinct from, other ChinNPV isolates.
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Affiliation(s)
- Robert L Harrison
- Invasive Insect Biocontrol and Behavior Laboratory, Beltsville Agricultural Research Center, USDA Agricultural Research Service, Beltsville, MD 20705, USA.
| | - Daniel L Rowley
- Invasive Insect Biocontrol and Behavior Laboratory, Beltsville Agricultural Research Center, USDA Agricultural Research Service, Beltsville, MD 20705, USA
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Zhao M, Li S, Zhou Q, Zhou D, He N, Qian Z. Safety evaluation of microbial pesticide (HaNPV) based on PCR method. Front Chem Sci Eng 2019. [DOI: 10.1007/s11705-018-1777-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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55
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Cuartas PE, Villamizar LF, Barrera GP, Ruiz JC, Campos JC, León-Martínez G, Gómez-Valderrama J. Novel biopesticide based on Erinnyis ello betabaculovirus: characterization and preliminary field evaluation to control Erinnyis ello in rubber plantations. PEST MANAGEMENT SCIENCE 2019; 75:1391-1399. [PMID: 30414258 DOI: 10.1002/ps.5259] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 10/30/2018] [Accepted: 11/01/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND The hornworn Erinnyis ello is the major pest of natural rubber crops in Colombia, mainly controlled using toxic chemical insecticides. The use of E. ello Betabaculovirus is an environmentally sustainable alternative for its control. The aim of the present work was to characterize a prototype biopesticide formulation and evaluate its efficacy under different conditions. RESULTS Quality control evaluations of formulated biopesticide revealed that all the parameters evaluated were under the permissible level. The lethal concentrations LC50 and LC90 of the biopesticide were 4.3 × 103 and 5.5 × 104 occlusion bodies (OBs) mL-1 , respectively. Biopesticide efficacies against second and fourth instar larvae under greenhouse conditions were higher than 80%. Evaluation of two application rates in a clonal garden resulted in 84% and 88% efficacy, comparable to that obtained with the chemical. The biopesticide in a commercial plantation showed efficacies between 74% and 82%. Biopesticide post-application persistence was estimated at least in 1 week under field natural conditions. Results allowed selection of the lowest evaluated dose (1 × 1011 OBs ha-1 ) as the basis for further field evaluations. CONCLUSION Formulated ErelGV showed high efficacy to control the hornworm in rubber crops and high potential to be included in integrated pest management programs, thus it could be an interesting alternative to replace agrochemicals. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Paola E Cuartas
- Departamento de Bioproductos, Corporación Colombiana de Investigación Agropecuaria - Agrosavia, Mosquera, Colombia
| | - Laura F Villamizar
- Centro de Investigación Tibaitatá, Corporación Colombiana de Investigación Agropecuaria - Agrosavia, Mosquera, Colombia
- Forage Science, AgResearch Ltd. Lincoln Research Centre, New Zealand
| | - Gloria P Barrera
- Centro de Investigación Tibaitatá, Corporación Colombiana de Investigación Agropecuaria - Agrosavia, Mosquera, Colombia
| | - Jenny C Ruiz
- Centro de Investigación Tibaitatá, Corporación Colombiana de Investigación Agropecuaria - Agrosavia, Mosquera, Colombia
| | - Juan C Campos
- Centro de Investigación La Libertad, Corporación Colombiana de Investigación Agropecuaria - Agrosavia, Puerto López, Colombia
| | - Guillermo León-Martínez
- Centro de Investigación La Libertad, Corporación Colombiana de Investigación Agropecuaria - Agrosavia, Puerto López, Colombia
| | - Juliana Gómez-Valderrama
- Centro de Investigación Tibaitatá, Corporación Colombiana de Investigación Agropecuaria - Agrosavia, Mosquera, Colombia
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Larem A, Ben-Tiba S, Wennmann JT, Gueli Alletti G, Jehle JA. Elucidating the genetic diversity of Phthorimaea operculella granulovirus (PhopGV). J Gen Virol 2019; 100:679-690. [PMID: 30794120 DOI: 10.1099/jgv.0.001215] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Twelve complete genome sequences of Phthorimaea operculella granulovirus (PhopGV) isolates from four different continents (Africa, South America, Asia and Europe) were analysed after Illumina next-generation sequencing (NGS). The isolates have a circular double-stranded DNA genome that is 118 355 to 119 177 bp in length and all of them encode 130 open reading frames (ORFs). Analysis of single-nucleotide polymorphisms (SNPs) revealed a unique set of SNP positions for every tested isolate. The genome sequences of the investigated PhopGV isolates were classified into a new system of four (1-4) groups according to the presence of group-specific SNPs as well as insertions and deletions. These genome groups correlated with phylogenetic lineages inferred from minimum-evolution trees of the whole-genome consensus nucleotide sequences. All members of group 3 originated from the Mediterranean area, whereas the geographical origin and the group assignment did not correlate for isolates belonging to genome groups 1, 2 or 4. The high degree of coverage facilitated the determination of variant nucleotide frequencies. We conclude that the geographical isolates of PhopGV are genetically highly similar. On the other hand, they were rarely genetically homogenous and in most cases appeared to be mixtures of multiple genotypes.
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Affiliation(s)
- Andreas Larem
- Institute for Biological Control, Federal Research Centre for Cultivated Plants, Julius Kühn Institute, Heinrichstraße 243, 64287 Darmstadt, Germany
| | - Saoussen Ben-Tiba
- Institute for Biological Control, Federal Research Centre for Cultivated Plants, Julius Kühn Institute, Heinrichstraße 243, 64287 Darmstadt, Germany
| | - Jörg T Wennmann
- Institute for Biological Control, Federal Research Centre for Cultivated Plants, Julius Kühn Institute, Heinrichstraße 243, 64287 Darmstadt, Germany
| | - Gianpiero Gueli Alletti
- Institute for Biological Control, Federal Research Centre for Cultivated Plants, Julius Kühn Institute, Heinrichstraße 243, 64287 Darmstadt, Germany
| | - Johannes A Jehle
- Institute for Biological Control, Federal Research Centre for Cultivated Plants, Julius Kühn Institute, Heinrichstraße 243, 64287 Darmstadt, Germany
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Masson T, Fabre ML, Ferrelli ML, Pidre ML, Romanowski V. Protein composition of the occlusion bodies of Epinotia aporema granulovirus. PLoS One 2019; 14:e0207735. [PMID: 30753194 PMCID: PMC6372164 DOI: 10.1371/journal.pone.0207735] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 01/21/2019] [Indexed: 12/28/2022] Open
Abstract
Within family Baculoviridae, members of the Betabaculovirus genus are employed as biocontrol agents against lepidopteran pests, either alone or in combination with selected members of the Alphabaculovirus genus. Epinotia aporema granulovirus (EpapGV) is a fast killing betabaculovirus that infects the bean shoot borer (E. aporema) and is a promising biopesticide. Because occlusion bodies (OBs) play a key role in baculovirus horizontal transmission, we investigated the composition of EpapGV OBs. Using mass spectrometry-based proteomics we could identify 56 proteins that are included in the OBs during the final stages of larval infection. Our data provides experimental validation of several annotated hypothetical coding sequences. Proteogenomic mapping against genomic sequence detected a previously unannotated ac110-like core gene and a putative translation fusion product of ORFs epap48 and epap49. Comparative studies of the proteomes available for the family Baculoviridae highlight the conservation of core gene products as parts of the occluded virion. Two proteins specific for betabaculoviruses (Epap48 and Epap95) are incorporated into OBs. Moreover, quantification based on emPAI values showed that Epap95 is one of the most abundant components of EpapGV OBs.
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Affiliation(s)
- Tomás Masson
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - María Laura Fabre
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - María Leticia Ferrelli
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - Matías Luis Pidre
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - Víctor Romanowski
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
- * E-mail:
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58
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Bentivenha JPF, Rodrigues JG, Lima MF, Marçon P, Popham HJR, Omoto C. Baseline Susceptibility of Spodoptera frugiperda (Lepidoptera: Noctuidae) to SfMNPV and Evaluation of Cross-Resistance to Major Insecticides and Bt Proteins. JOURNAL OF ECONOMIC ENTOMOLOGY 2019; 112:91-98. [PMID: 30395231 DOI: 10.1093/jee/toy342] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Indexed: 06/08/2023]
Abstract
The resistance evolution of Spodoptera frugiperda (J.E. Smith) to insecticides and Bt proteins along with the intensive crop production systems adopted in Brazil make it challenging to implement integrated pest management. The adoption of alternative methods to manage pests is fundamental to the implementation of favorable integrated pest management and insect resistance management. Spodoptera frugiperda multiple nucleopolyhedrovirus (SfMNPV) is a valuable tool for S. frugiperda control. The characterization of the baseline susceptibility of S. frugiperda populations and cross-resistance involving SfMNPV and major insecticides and Bt proteins have not yet been conducted. The objective of this study was to characterize the baseline susceptibility of S. frugiperda populations from five Brazilian States to SfMNPV (Cartugen, AgBiTech, Fort Worth, TX). Possible cross-resistance to insecticides and Bt proteins among resistant S. frugiperda strains was also assessed. There were no differences in the susceptibility of the studied populations to SfMNPV. The estimated diagnostic concentration may be utilized in future monitoring studies to SfMNPV. The SfMNPV presented no cross-resistance to the chemical insecticides and to the Bt proteins tested. Our results provide evidence of the biological activity and high potential of SfMNPV as a distinct insecticidal mode of action for use in rotation with other tools. This biological insecticide is known to have a favorable toxicological and ecotoxicological profile and will be a valuable tool in insect resistance management and integrated pest management programs for control of S. frugiperda.
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Affiliation(s)
- José P F Bentivenha
- Department of Entomology and Acarology, Luiz de Queiroz College of Agriculture, University of São Paulo, Piracicaba, São Paulo, Brazil
| | - Juliana G Rodrigues
- Department of Entomology and Acarology, Luiz de Queiroz College of Agriculture, University of São Paulo, Piracicaba, São Paulo, Brazil
| | | | | | | | - Celso Omoto
- Department of Entomology and Acarology, Luiz de Queiroz College of Agriculture, University of São Paulo, Piracicaba, São Paulo, Brazil
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New Method for Differentiation of Granuloviruses (Betabaculoviruses) Based on Real-Time Polymerase Chain Reaction (Real-Time PCR). Viruses 2019; 11:v11020115. [PMID: 30699913 PMCID: PMC6410086 DOI: 10.3390/v11020115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 01/24/2019] [Accepted: 01/24/2019] [Indexed: 12/22/2022] Open
Abstract
Baculoviridae is a highly diverse family of rod-shaped viruses with double-stranded DNA. To date, almost 100 species have had their complete genomic sequences deposited in the GenBank database, a quarter of which comprises granuloviruses (GVs). Many of the genomes are sequenced using next-generation sequencing, which is currently considered the best method for characterizing new species, but it is time-consuming and expensive. Baculoviruses form a safe alternative to overused chemical pesticides and therefore there is a constant need for identifying new species that can be active components of novel biological insecticides. In this study, we have described a fast and reliable method for the detection of new and differentiation of previously analyzed granulovirus species based on a real-time polymerase chain reaction (PCR) technique with melting point curve analysis. The sequences of highly conserved baculovirus genes, such as granulin and late expression factors 8 and 9 (lef-8 and lef-9), derived from GVs available to date have been analyzed and used for degenerate primer design. The developed method was tested on a representative group of eight betabaculoviruses with comparisons of melting temperatures to allow for quick and preliminary granulovirus detection. The proposed real-time PCR procedure may be a very useful tool as an easily accessible screening method in a majority of laboratories.
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60
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Liu Z, Wang X, Dai Y, Wei X, Ni M, Zhang L, Zhu Z. Expressing Double-Stranded RNAs of Insect Hormone-Related Genes Enhances Baculovirus Insecticidal Activity. Int J Mol Sci 2019; 20:E419. [PMID: 30669419 PMCID: PMC6359566 DOI: 10.3390/ijms20020419] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 01/16/2019] [Accepted: 01/17/2019] [Indexed: 12/16/2022] Open
Abstract
Baculoviruses have already been used for insect pest control, but the slow killing speed limits their further promotion and application. Here we provide a strategy for improving baculovirus insecticidal activity using Helicoverpa armigera nucleopolyhedrovirus (HearNPV) to express double-stranded RNAs (dsRNAs) targeting cotton bollworm (Helicoverpa armigera) juvenile hormone (JH)-related genes. Droplet-feeding bioassays show that the 50% lethal concentration (LC50) values of recombinant baculoviruses expressing the dsRNA of JH acid methyl transferase gene (HaJHAMT) and the JH acid binding protein gene (HaJHBP) were 1.24 × 10⁴ polyhedral inclusion bodies (PIB)/mL and 2.26 × 10⁴ PIB/mL, respectively. Both were much lower than the control value (8.12 × 10⁴ PIB/mL). Meanwhile, the LT50 of recombinant baculovirus expressing dsRNA of HaJHBP was only 54.2% of the control value, which means that larval death was accelerated. Furthermore, the mRNA level of target genes was reduced in recombinant baculovirus-treated cotton bollworm larvae. Transcription of several key genes involved in hormone signaling pathways-for example, ecdysone receptor gene (HaEcR)-was also altered. This study establishes a new strategy for pest management by interfering with insect hormone-related gene expression via baculoviruses, and the engineered baculoviruses have great potential application in cotton production.
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Affiliation(s)
- Zheming Liu
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Xiaofang Wang
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101, China.
| | - Yan Dai
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101, China.
| | - Xiaoli Wei
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101, China.
| | - Mi Ni
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101, China.
| | - Lei Zhang
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101, China.
| | - Zhen Zhu
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101, China.
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[Anti-viral responses in insect cells]. Uirusu 2019; 69:47-60. [PMID: 32938894 DOI: 10.2222/jsv.69.47] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Zanardo Botelho ABR, da Silva IF, Ávila CJ. Control of Chrysodeixis includens (Lepidoptera: Noctuidae) using Chin-IA (I-A) isolate as integrate component of management in soybean crops. ARQUIVOS DO INSTITUTO BIOLÓGICO 2019. [DOI: 10.1590/1808-1657000712018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT Chrysodeixis includens is an important pest of soybean crop who has gained more visibility in the Brazilian Cerrado due to damage caused in this region. Foliar consumption, feeding period and mortality level of soybean loopers in laboratory, as well as their control in the field conditions, were evaluated after application of the ChinNPV virus in soybean plants. In the laboratory, were tested six concentrations of isolate Chin-IA (I-A) (1 × 1011, 2 × 1011, 4 × 1011, 6 × 1011, 8 × 1011 and 10 × 1011 PIB ha-1), one dose of methomyl chemical insecticide (172 g ai ha-1) and distilled water (control). The field experiment was carried out in the 2016/2017 season using the same cultivar and laboratory treatments, except for the lowest virus concentration. The population density of small and large larvae was evaluated before and at 5, 8 and 12 days after application (DAA) of the treatments in soybean plants. All concentrations of the isolate Chin-IA (I-A) have reduced the soybean loopers consumption and their feeding period, showing 100% of mortality after 3 – 4 days without differing from treatment with the chemical insecticide. After eight DAA of virus in the field, the population density of small and large larvae was reduced, providing satisfactory levels of control. These results showed the evident potential of ChinNPV in the reduction of defoliation power and maintenance the soybean loopers population under of control level, and thus may be used as complementary method in the integrated management of this pest in soybean crops.
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Larem A, Fritsch E, Undorf-Spahn K, Kleespies RG, Jehle JA. Interaction of Phthorimaea operculella granulovirus with a Nosema sp. microsporidium in larvae of Phthorimaea operculella. J Invertebr Pathol 2018; 160:76-86. [PMID: 30550745 DOI: 10.1016/j.jip.2018.12.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 12/07/2018] [Accepted: 12/11/2018] [Indexed: 12/29/2022]
Abstract
An antagonistic effect of a microsporidium (Nosema sp.) infection on the virulence of Phthorimaea operculella granulovirus (PhopGV) was recorded in potato tuber moth (Phthorimaea operculella) larvae with mixed infections. When the P. operculella colony was infected at a high rate (42.8-100%) with the microsporidium, it was less susceptible to the isolate PhopGV-GR1.1. A virus concentration 1.89 × 105 higher was necessary to cause the same level of mortality produced in the P. operculella colony when it was uninfected or had a low level of infection with the microsporidium (0-30%). This antagonistic effect was driven by a Nosema isolate (termed Nosema sp. Phop) that was purified from microsporidian-infected P. operculella individuals. The purified microsporidium was characterised by morphological features, including size, filament coils and different developmental stages using transmission electron microscopy (TEM). On the molecular level, the partial cistron rDNA information of the small ribosomal subunit (SSU), internal transcribed spacer (ITS), and the large ribosomal subunit (LSU) were identified. Phylogenetic analyses revealed that the newly described microsporidium belongs to the "true Nosema" clade. Partial sequence information of the RNA polymerase II largest subunit (RPB1) suggested that Nosema bombycis is the closest relative (98% identity). The morphological and phylogenetic characteristics suggest that it is an isolate of N. bombycis. Interactions of microsporidia and betabaculoviruses are rarely described in the literature, although mixed infections of different pathogens seem to be rather common events, ranging from antagonistic to mutualistic interactions. The observed antagonistic relationship between the Nosema sp. and PhopGV-GR1.1 showed that pathogen interactions need to be considered when single pathogens are applied to insect populations in the context of biological control of insect pests.
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Affiliation(s)
- Andreas Larem
- Institute for Biological Control, Federal Research Centre for Cultivated Plants, Julius Kühn Institute, Heinrichstraße 243, 64287 Darmstadt, Germany.
| | - Eva Fritsch
- Institute for Biological Control, Federal Research Centre for Cultivated Plants, Julius Kühn Institute, Heinrichstraße 243, 64287 Darmstadt, Germany.
| | - Karin Undorf-Spahn
- Institute for Biological Control, Federal Research Centre for Cultivated Plants, Julius Kühn Institute, Heinrichstraße 243, 64287 Darmstadt, Germany.
| | - Regina G Kleespies
- Institute for Biological Control, Federal Research Centre for Cultivated Plants, Julius Kühn Institute, Heinrichstraße 243, 64287 Darmstadt, Germany.
| | - Johannes A Jehle
- Institute for Biological Control, Federal Research Centre for Cultivated Plants, Julius Kühn Institute, Heinrichstraße 243, 64287 Darmstadt, Germany.
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Baqué MA, Gioria VV, Micheloud GA, Casado NMC, Claus JD, Gennaro AM. Spin label EPR suggests the presence of cholesterol rich domains in cultured insect cell membranes. Biochem Biophys Res Commun 2018; 505:1038-1042. [PMID: 30309652 DOI: 10.1016/j.bbrc.2018.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Accepted: 10/02/2018] [Indexed: 11/30/2022]
Abstract
Different spin labels were incorporated to the membranes of cultured insect UFL-AG-286 cells in order to characterize their physical properties by Electron Paramagnetic Resonance spectroscopy (EPR). The spectrum of the spin label 12-SASL incorporated to cell membranes was similar as those obtained in membrane model systems composed of eggPC/cholesterol. However, the spectrum of the spin label CSL, chemically related to cholesterol, was drastically different in the two systems. Interestingly, when cell cholesterol content was reduced using methyl beta cyclodextrin, an EPR spectrum similar to those of model membranes was obtained. The analysis of these experiments suggests the existence of cholesterol rich regions in UFL-AG-286 cell membranes.
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Affiliation(s)
- M A Baqué
- Departamento de Física, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional de Litoral, Ciudad Universitaria, 3000, Santa Fe, Argentina
| | - V V Gioria
- Laboratorio de Virología, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Ciudad Universitaria, 3000, Santa Fe, Argentina
| | - G A Micheloud
- Laboratorio de Virología, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Ciudad Universitaria, 3000, Santa Fe, Argentina
| | - N M C Casado
- Departamento de Física, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional de Litoral, Ciudad Universitaria, 3000, Santa Fe, Argentina
| | - J D Claus
- Laboratorio de Virología, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Ciudad Universitaria, 3000, Santa Fe, Argentina
| | - A M Gennaro
- Departamento de Física, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional de Litoral, Ciudad Universitaria, 3000, Santa Fe, Argentina; IFIS Litoral (UNL-CONICET), Güemes 3450, 3000, Santa Fe, Argentina.
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Abstract
Microbial biopesticides include several microorganisms like bacteria, fungi, baculoviruses, and nematode-associated bacteria acting against invertebrate pests in agro-ecosystems. The biopesticide sector is experiencing a significant growth and many discoveries are being developed into new biopesticidal products that are fueling a growing global market offer. Following a few decades of successful use of the entomopathogenic bacterium Bacillus thuringiensis and a few other microbial species, recent academic and industrial efforts have led to the discovery of new microbial species and strains, and of their specific toxins and virulence factors. Many of these have, therefore, been developed into commercial products. Bacterial entomopathogens include several Bacillaceae, Serratia, Pseudomonas, Yersinia, Burkholderia, Chromobacterium, Streptomyces, and Saccharopolyspora species, while fungi comprise different strains of Beauveria bassiana, B. brongniartii, Metarhizium anisopliae, Verticillium, Lecanicillium, Hirsutella, Paecilomyces, and Isaria species. Baculoviruses are species-specific and refer to niche products active against chewing insects, especially Lepidopteran caterpillars. Entomopathogenic nematodes (EPNs) mainly include species in the genera Heterorhabditis and Steinernema associated with mutualistic symbiotic bacteria belonging to the genera Photorhabdus and Xenorhabdus. An updated representation of the current knowledge on microbial biopesticides and of the availability of active substances that can be used in integrated pest management programs in agro-ecosystems is reported here.
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Ferrelli ML, Pidre ML, Ghiringhelli PD, Torres S, Fabre ML, Masson T, Cédola MT, Sciocco-Cap A, Romanowski V. Genomic analysis of an Argentinean isolate of Spodoptera frugiperda granulovirus reveals that various baculoviruses code for Lef-7 proteins with three F-box domains. PLoS One 2018; 13:e0202598. [PMID: 30133523 PMCID: PMC6105029 DOI: 10.1371/journal.pone.0202598] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 08/05/2018] [Indexed: 01/19/2023] Open
Abstract
A new isolate of the Spodoptera frugiperda granulovirus, SfGV ARG, was completely sequenced and analyzed. The SfGV ARG genome is 139,812 bp long and encodes 151 putative open reading frames. Of these ORFs, 56 were found in betabaculoviruses, 19 of which are present only in GVs closely related to SfGV. Seven ORFs found homologs in this small GV group and also in noctuid NPVs. ORF066 codes a 74 amino acid protein, overlapped with nudix gene, with several homologs in baculovirus, found by tblastn search. Comparison with the genome of the Colombian isolate SfGV VG008 resulted in SfGV being 1101 bp smaller and lacking a homologue of VG008 ORF084, which codes for Lef-7. However, we found that ORF051 shows remote homology to Lef-7 proteins. Moreover, analysis of ORF051 along with Lef-7 proteins coded by a group of noctuid specific GVs and NPVs indicated that Lef-7 proteins coded by these viruses include three F-box domains in contrast to the single one reported for AcMNPV Lef-7. SfGV ARG genome also contains a split photolyase as a distinct feature not found in VG008. BlastX analysis revealed that a complete photolyase is coded considering a putative frameshift in a poly-A tract, which resembles known slippery sequences involved in programmed ribosome frameshifting.
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Affiliation(s)
- María Leticia Ferrelli
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - Matías Luis Pidre
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - Pablo Daniel Ghiringhelli
- Laboratorio de Ingeniería Genética y Biología Celular y Molecular-Área Virosis de Insectos (LIGBCM-AVI), Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Bernal, Buenos Aires, Argentina
| | - Sofía Torres
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - María Laura Fabre
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - Tomás Masson
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - Maia Tatiana Cédola
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - Alicia Sciocco-Cap
- IMYZA-CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA), CC 25 (B1712WAA) Castelar, Buenos Aires, Argentina
| | - Víctor Romanowski
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
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Bernal A, Simón O, Williams T, Muñoz D, Caballero P. Remarkably efficient production of a highly insecticidal Chrysodeixis chalcites nucleopolyhedrovirus (ChchNPV) isolate in its homologous host. PEST MANAGEMENT SCIENCE 2018; 74:1586-1592. [PMID: 29297971 DOI: 10.1002/ps.4846] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 12/21/2017] [Accepted: 12/22/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND A Chrysodeixis chalcites nucleopolyhedrovirus from the Canary Islands (ChchNPV-TF1) has proved to be effective for control of Chrysodeixis chalcites on banana crops. Commercialization of this virus as a bioinsecticide requires an efficient production system. RESULTS The sixth instar (L6 ) was the most suitable for virus production, producing 1.80 × 1011 occlusion bodies (OB)/larva and showed a lower prevalence of cannibalism (5.4%) than fourth (L4 ) or fifth (L5 ) instars. Inoculation of L6 at 24 h post molting produced six times more OB (5.72 × 1011 OB/larva) than recently molted L6 larvae (1.00 × 1011 OB/larva). No significant differences were recorded in mean time to death (165-175 h) or OB production per larva (3.75 × 1011 to 5.97 × 1011 ) or per mg larval weight (1.30 × 1011 to 2.11 × 109 ), in larvae inoculated with a range of inoculum concentrations (LC50 -LC90 ). Groups of infected L6 larvae reared at a density of 150 larvae/container produced a greater total number of OBs (8.07 × 1013 OB/container) than lower densities (25, 50 and 100 OB/container), and a similar number to containers with 200 inoculated larvae (8.43 × 1013 OB/container). CONCLUSION The processes described here allow efficient production of sufficient OBs to treat ∼ 40 ha of banana crops using the insects from a single container. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Alexandra Bernal
- Instituto de Agrobiotecnología, CSIC-Gobierno de Navarra, Mutilva Baja, Spain
| | - Oihane Simón
- Instituto de Agrobiotecnología, CSIC-Gobierno de Navarra, Mutilva Baja, Spain
| | | | - Delia Muñoz
- Dpto. Producción Agraria, Universidad Pública de Navarra, Pamplona, Spain
| | - Primitivo Caballero
- Instituto de Agrobiotecnología, CSIC-Gobierno de Navarra, Mutilva Baja, Spain
- Dpto. Producción Agraria, Universidad Pública de Navarra, Pamplona, Spain
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Moldován N, Tombácz D, Szűcs A, Csabai Z, Balázs Z, Kis E, Molnár J, Boldogkői Z. Third-generation Sequencing Reveals Extensive Polycistronism and Transcriptional Overlapping in a Baculovirus. Sci Rep 2018; 8:8604. [PMID: 29872099 PMCID: PMC5988703 DOI: 10.1038/s41598-018-26955-8] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 05/22/2018] [Indexed: 12/11/2022] Open
Abstract
The Autographa californica multiple nucleopolyhedrovirus (AcMNPV) is an insect-pathogen baculovirus. In this study, we applied the Oxford Nanopore Technologies platform for the analysis of the polyadenylated fraction of the viral transcriptome using both cDNA and direct RNA sequencing methods. We identified and annotated altogether 132 novel transcripts and transcript isoforms, including 4 coding and 4 non-coding RNA molecules, 47 length variants, 5 splice isoforms, as well as 23 polycistronic and 49 complex transcripts. All of the identified novel protein-coding genes were 5'-truncated forms of longer host genes. In this work, we demonstrated that in the case of transcript start site isoforms, the promoters and the initiator sequence of the longer and shorter variants belong to the same kinetic class. Long-read sequencing also revealed a complex meshwork of transcriptional overlaps, the function of which needs to be clarified. Additionally, we developed bioinformatics methods to improve the transcript annotation and to eliminate the non-specific transcription reads generated by template switching and false priming.
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Affiliation(s)
- Norbert Moldován
- Department of Medical Biology, Faculty of Medicine, University of Szeged, Szeged, 6720, Hungary
| | - Dóra Tombácz
- Department of Medical Biology, Faculty of Medicine, University of Szeged, Szeged, 6720, Hungary
| | - Attila Szűcs
- Department of Medical Biology, Faculty of Medicine, University of Szeged, Szeged, 6720, Hungary
| | - Zsolt Csabai
- Department of Medical Biology, Faculty of Medicine, University of Szeged, Szeged, 6720, Hungary
| | - Zsolt Balázs
- Department of Medical Biology, Faculty of Medicine, University of Szeged, Szeged, 6720, Hungary
| | - Emese Kis
- Solvo Biotechnology, Szeged, 6720, Hungary
| | | | - Zsolt Boldogkői
- Department of Medical Biology, Faculty of Medicine, University of Szeged, Szeged, 6720, Hungary.
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López MG, Diez M, Alfonso V, Taboga O. Biotechnological applications of occlusion bodies of Baculoviruses. Appl Microbiol Biotechnol 2018; 102:6765-6774. [DOI: 10.1007/s00253-018-9130-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 05/21/2018] [Accepted: 05/22/2018] [Indexed: 11/29/2022]
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70
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Li J, Sun Y, Li Y, Liu X, Yue Q, Li Z. Inhibition of cellular fatty acid synthase impairs replication of budded virions of Autographa californica multiple nucleopolyhedrovirus in Spodoptera frugiperda cells. Virus Res 2018; 252:41-47. [PMID: 29746884 DOI: 10.1016/j.virusres.2018.05.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 04/20/2018] [Accepted: 05/06/2018] [Indexed: 10/17/2022]
Abstract
Fatty acid synthase (FASN) catalyzes the synthesis of palmitate, which is required for formation of complex fatty acids and phospholipids that are involved in energy production, membrane remodeling and modification of host and viral proteins. Presently, the roles of cellular fatty acid synthesis pathway in Autographa californica multiple nucleopolyhedrovirus (AcMNPV) infection is not clear. In this study, we found that the transcripts level of fasn was significantly up-regulated at the early stage of AcMNPV infection. Treatment of AcMNPV-infected Spodoptera frugiperda Sf9 cells with C75, a specific inhibitor of FASN, did not affect the internalization of budded virions into cells, but dramatically reduced the infectious AcMNPV production. Further analysis revealed that the presence of C75 significantly decreased the expression level for two reporter genes, beta-galactosidase and beta-glucuronidase, that were separately directed by the early and late promoter of AcMNPV. Similarly, Western blot analysis showed that, in C75-treated cells, the expression of viral gp64 was delayed and decreased. Additionally, treatment with C75 also resulted in a significant reduction in the accumulation of viral genomic DNA. Together, these results demonstrate that the fatty acid synthesis pathway is required for efficient replication of AcMNPV, but it might not be necessary for AcMNPV entry into insect cells.
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Affiliation(s)
- Jingfeng Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Northwest Loess Plateau Crop Pest Management of Ministry of Agriculture, College of Plant Protection, Northwest A&F University, Taicheng Road, Yangling, Shaanxi 712100, China
| | - Yu Sun
- State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Northwest Loess Plateau Crop Pest Management of Ministry of Agriculture, College of Plant Protection, Northwest A&F University, Taicheng Road, Yangling, Shaanxi 712100, China
| | - Yuying Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Northwest Loess Plateau Crop Pest Management of Ministry of Agriculture, College of Plant Protection, Northwest A&F University, Taicheng Road, Yangling, Shaanxi 712100, China
| | - Ximeng Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Northwest Loess Plateau Crop Pest Management of Ministry of Agriculture, College of Plant Protection, Northwest A&F University, Taicheng Road, Yangling, Shaanxi 712100, China
| | - Qi Yue
- State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Northwest Loess Plateau Crop Pest Management of Ministry of Agriculture, College of Plant Protection, Northwest A&F University, Taicheng Road, Yangling, Shaanxi 712100, China
| | - Zhaofei Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Northwest Loess Plateau Crop Pest Management of Ministry of Agriculture, College of Plant Protection, Northwest A&F University, Taicheng Road, Yangling, Shaanxi 712100, China.
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Krejmer-Rabalska M, Rabalski L, Lobo de Souza M, Moore SD, Szewczyk B. New Method for Differentiation of Granuloviruses (Betabaculoviruses) Based on Multitemperature Single Stranded Conformational Polymorphism. Int J Mol Sci 2017; 19:ijms19010083. [PMID: 29283392 PMCID: PMC5796033 DOI: 10.3390/ijms19010083] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 12/20/2017] [Accepted: 12/23/2017] [Indexed: 12/15/2022] Open
Abstract
Baculoviruses have been used as biopesticides for decades. Recently, due to the excessive use of chemical pesticides there is a need for finding new agents that may be useful in biological protection. Sometimes few isolates or species are discovered in one host. In the past few years, many new baculovirus species have been isolated from environmental samples, thoroughly characterized and thanks to next generation sequencing methods their genomes are being deposited in the GenBank database. Next generation sequencing (NGS) methodology is the most certain way of detection, but it has many disadvantages. During our studies, we have developed a method based on Polymerase chain reaction (PCR) followed by Multitemperature Single Stranded Conformational Polymorphism (MSSCP) which allows for distinguishing new granulovirus isolates in only a few hours and at low-cost. On the basis of phylogenetic analysis of betabaculoviruses, representative species have been chosen. The alignment of highly conserved genes—granulin and late expression factor-9, was performed and the degenerate primers were designed to amplify the most variable, short DNA fragments flanked with the most conserved sequences. Afterwards, products of PCR reaction were analysed by MSSCP technique. In our opinion, the proposed method may be used for screening of new isolates derived from environmental samples.
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Affiliation(s)
- Martyna Krejmer-Rabalska
- Department of Recombinant Vaccines, Intercollegiate Faculty of Biotechnology University of Gdansk and Medical University of Gdansk, 80-807 Gdansk, Poland.
| | - Lukasz Rabalski
- Department of Recombinant Vaccines, Intercollegiate Faculty of Biotechnology University of Gdansk and Medical University of Gdansk, 80-807 Gdansk, Poland.
| | - Marlinda Lobo de Souza
- Embrapa Recursos Genéticos e Biotecnologia, Parque Estacao Biológica, 70770-900 Brasilia, Brazil.
| | - Sean D Moore
- Citrus Research International (CRI), P.O. Box 20285, Humewood 6013, Port Elizabeth, South Africa.
- Department of Zoology and Entomology, Rhodes University, P.O. Box 94, Grahamstown 6140, South Africa.
| | - Boguslaw Szewczyk
- Department of Recombinant Vaccines, Intercollegiate Faculty of Biotechnology University of Gdansk and Medical University of Gdansk, 80-807 Gdansk, Poland.
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Pelosse M, Crocker H, Gorda B, Lemaire P, Rauch J, Berger I. MultiBac: from protein complex structures to synthetic viral nanosystems. BMC Biol 2017; 15:99. [PMID: 29084535 PMCID: PMC5661938 DOI: 10.1186/s12915-017-0447-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The MultiBac baculovirus/insect cell expression vector system was conceived as a user-friendly, modular tool-kit for producing multiprotein complexes for structural biology applications. MultiBac has allowed the structure and function of many molecular machines to be elucidated, including previously inaccessible high-value drug targets. More recently, MultiBac developments have shifted to customized baculoviral genomes that are tailored for a range of applications, including synthesizing artificial proteins by genetic code expansion. We review some of these developments, including the ongoing rewiring of the MultiBac system for mammalian applications, notably CRISPR/Cas9-mediated gene editing.
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Affiliation(s)
- Martin Pelosse
- The School of Biochemistry and Bristol Synthetic Biology Centre BrisSynBio, University of Bristol, Tankard's Close, Bristol, BS8 1TD, UK
| | - Hannah Crocker
- The School of Biochemistry and Bristol Synthetic Biology Centre BrisSynBio, University of Bristol, Tankard's Close, Bristol, BS8 1TD, UK
| | - Barbara Gorda
- The School of Biochemistry and Bristol Synthetic Biology Centre BrisSynBio, University of Bristol, Tankard's Close, Bristol, BS8 1TD, UK
| | - Paul Lemaire
- Geneva Biotech SARL, Avenue de la Roseraie 64, 1205, Genève, Switzerland
| | - Jens Rauch
- Systems Biology Ireland, University College Dublin, Belfield Dublin 4, Republic of Ireland
| | - Imre Berger
- The School of Biochemistry and Bristol Synthetic Biology Centre BrisSynBio, University of Bristol, Tankard's Close, Bristol, BS8 1TD, UK.
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Roles of Cellular NSF Protein in Entry and Nuclear Egress of Budded Virions of Autographa californica Multiple Nucleopolyhedrovirus. J Virol 2017; 91:JVI.01111-17. [PMID: 28747507 DOI: 10.1128/jvi.01111-17] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Accepted: 07/20/2017] [Indexed: 02/03/2023] Open
Abstract
In eukaryotic cells, the soluble N-ethylmaleimide-sensitive factor (NSF) attachment protein receptor (SNARE) proteins comprise the minimal machinery that triggers fusion of transport vesicles with their target membranes. Comparative studies revealed that genes encoding the components of the SNARE system are highly conserved in yeast, insect, and human genomes. Upon infection of insect cells by the virus Autographa californica multiple nucleopolyhedrovirus (AcMNPV), the transcript levels of most SNARE genes initially were upregulated. We found that overexpression of dominant-negative (DN) forms of NSF or knockdown of the expression of NSF, the key regulator of the SNARE system, significantly affected infectious AcMNPV production. In cells expressing DN NSF, entering virions were trapped in the cytoplasm or transported to the nucleus with low efficiency. The presence of DN NSF also moderately reduced trafficking of the viral envelope glycoprotein GP64 to the plasma membrane but dramatically inhibited production of infectious budded virions (BV). Transmission electron microscopy analysis of infections in cells expressing DN NSF revealed that progeny nucleocapsids were retained in a perinuclear space surrounded by inner and outer nuclear membranes. Several baculovirus conserved (core) proteins (Ac76, Ac78, GP41, Ac93, and Ac103) that are important for infectious budded virion production were found to associate with NSF, and NSF was detected within the assembled BV. Together, these data indicate that the cellular SNARE system is involved in AcMNPV infection and that NSF is required for efficient entry and nuclear egress of budded virions of AcMNPV.IMPORTANCE Little is known regarding the complex interplay between cellular factors and baculoviruses during viral entry and egress. Here, we examined the cellular SNARE system, which mediates the fusion of vesicles in healthy cells, and its relation to baculovirus infection. Using a DN approach and RNA interference knockdown, we demonstrated that a general disruption of the SNARE machinery significantly inhibited the production of infectious BV of AcMNPV. The presence of a DN NSF protein resulted in low-efficiency entry of BV and the retention of progeny nucleocapsids in the perinuclear space during egress. Combined with these effects, we also found that several conserved (core) baculovirus proteins closely associate with NSF, and these results suggest their involvement in the egress of BV. Our findings are the first to demonstrate that the SNARE system is required for efficient entry of BV and nuclear egress of progeny nucleocapsids of baculoviruses.
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74
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de Los Ángeles Bivian-Hernández M, López-Tlacomulco J, Mares-Mares E, Ibarra JE, Del Rincón-Castro MC. Genomic analysis of a Trichoplusia ni Betabaculovirus (TnGV) with three different viral enhancing factors and two unique genes. Arch Virol 2017; 162:3705-3715. [PMID: 28856619 DOI: 10.1007/s00705-017-3506-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Accepted: 06/27/2017] [Indexed: 01/08/2023]
Abstract
The complete genome of a Trichoplusia ni granulovirus (TnGV) is described and analyzed. The genome contains 175,360 bp (KU752557), becoming the third largest genome within the genus Betabaculovirus, smaller only than the Xestia c-nigrum GV (XecnGV) (178,733 pb) and the Pseudaletia unipuncta GV (PsunGV) (176,677 pb) genomes. The TnGV genome has a 39.81% C+G content and a total of 180 ORFs were identified, 96 of them in the granulin gene direction and 84 in the opposite direction. A total of 94.38% of the ORFs showed high identity with those of ClanGV, HaGV, and SlGV. Eight homologous regions (hrs) were identified as well as one apoptosis inhibitor (IAP-3). Interestingly, three viral enhancing factors (VEFs) were located in TnGV genome: VEF-1 (orf153), VEF-3 (orf155), and VEF-4 (orf164), additional to another metalloprotease (orf37). Two ORFs were unique to TnGV (orf100 and orf101) and another one was shared by only TnGV and AgseGV (orf2). Eleven of the deduced proteins showed high identity with proteins from nucleopolyhedroviruses, three with proteins from ascoviruses, and one with an entomopoxvirus protein. The largest deduced protein contains 1,213 amino acids (orf43) and the smallest deduced protein contains only 50 amino acids (orf143). Sequence identity and phylogenetic analyses showed that the closest related genomes to TnGV are, to date, those of PsunGV and XecnGV. This genome analysis may contribute to functional research on TnGV, and may form the bases for the utilization of this betabaculovirus as a pest control agent.
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Affiliation(s)
- Ma de Los Ángeles Bivian-Hernández
- Posgrado en Biociencias, División de Ciencias de la Vida, Departamento de Alimentos, Campus Irapuato-Salamanca, Universidad de Guanajuato, Ex Hacienda El Copal Km. 9.0, Carretera Irapuato-León, Irapuato, Guanajuato, Mexico
| | | | - Everardo Mares-Mares
- Posgrado en Biociencias, División de Ciencias de la Vida, Departamento de Alimentos, Campus Irapuato-Salamanca, Universidad de Guanajuato, Ex Hacienda El Copal Km. 9.0, Carretera Irapuato-León, Irapuato, Guanajuato, Mexico
| | - Jorge E Ibarra
- CINVESTAV-Irapuato, Apartado Postal 629, 36500, Irapuato, Guanajuato, Mexico
| | - María Cristina Del Rincón-Castro
- Posgrado en Biociencias, División de Ciencias de la Vida, Departamento de Alimentos, Campus Irapuato-Salamanca, Universidad de Guanajuato, Ex Hacienda El Copal Km. 9.0, Carretera Irapuato-León, Irapuato, Guanajuato, Mexico.
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Shang Y, Wang M, Xiao G, Wang X, Hou D, Pan K, Liu S, Li J, Wang J, Arif BM, Vlak JM, Chen X, Wang H, Deng F, Hu Z. Construction and Rescue of a Functional Synthetic Baculovirus. ACS Synth Biol 2017; 6:1393-1402. [PMID: 28383905 DOI: 10.1021/acssynbio.7b00028] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Synthetic viruses provide a powerful platform to delve deeper into the nature and function of viruses as well as to engineer viruses with novel properties. So far, most synthetic viruses have been RNA viruses (<30 kb) and small DNA viruses, such as bacteriophage phiX174. Baculoviruses contain a large circular dsDNA genome of 80-180 kb and have been used as biocontrol agents and protein expression vectors. Here, we report on the first synthesis of a baculovirus based on the type species Autographa californica nucleopolyhedrovirus, AcMNPV, by a combination of PCR and transformation-associated recombination in yeast. The synthetic genome, designated AcMNPV-WIV-Syn1, is 145 299 bp comprising the complete genome of AcMNPV except for the hr4a locus that was replaced with an ∼11.5 kb cassette of bacterial and yeast artificial chromosomal elements and an egfp gene. Sf9 insect cells were transfected with AcMNPV-WIV-Syn1 DNA and progeny virus was examined by electron microscopy, and assayed in one-step growth curves and oral infectivity. The results conclusively showed that the rescued virus AcMNPV-WIV-Syn1 had structural and biological properties comparable to the parental virus. We validated a proof of concept that a bona fide baculovirus can be synthesized. The new platform allows manipulation at any or multiple loci and will facilitate future studies such as identifying the minimal baculovirus genome and construction of better expression vectors. This is the largest DNA virus synthesized so far, and its success is likely to be the impetus to stimulate the fields of other large DNA viruses such as herpesviruses and poxviruses.
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Affiliation(s)
- Yu Shang
- State
Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, PR China
- University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Manli Wang
- State
Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, PR China
| | - Gengfu Xiao
- State
Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, PR China
| | - Xi Wang
- State
Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, PR China
- University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Dianhai Hou
- State
Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, PR China
| | - Kai Pan
- State
Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, PR China
- University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Shurui Liu
- State
Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, PR China
- University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Jiang Li
- State
Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, PR China
| | - Jun Wang
- State
Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, PR China
| | - Basil M. Arif
- Laboratory
for Molecular Virology, Great Lakes Forestry Centre, Sault Sainte Marie, Ontario P6A 2E5, Canada
| | - Just M. Vlak
- Laboratory
of Virology, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Xinwen Chen
- State
Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, PR China
| | - Hualin Wang
- State
Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, PR China
| | - Fei Deng
- State
Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, PR China
| | - Zhihong Hu
- State
Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, PR China
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76
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Screening and Validation of Highly-Efficient Insecticidal Conotoxins from a Transcriptome-Based Dataset of Chinese Tubular Cone Snail. Toxins (Basel) 2017; 9:toxins9070214. [PMID: 28684723 PMCID: PMC5535161 DOI: 10.3390/toxins9070214] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 06/29/2017] [Accepted: 06/30/2017] [Indexed: 12/23/2022] Open
Abstract
Most previous studies have focused on analgesic and anti-cancer activities for the conotoxins identified from piscivorous and molluscivorous cone snails, but little attention has been devoted to insecticidal activity of conotoxins from the dominant vermivorous species. As a representative vermivorous cone snail, the Chinese tubular cone snail (Conus betulinus) is the dominant Conus species inhabiting the South China Sea. We sequenced related venom transcriptomes from C. betulinus using both the next-generation sequencing and traditional Sanger sequencing technologies, and a comprehensive library of 215 conotoxin transcripts was constructed. In our current study, six conotoxins with potential insecticidal activity were screened out from our conotoxin library by homologous search with a reported positive control (alpha-conotoxin ImI from C. imperialis) as the query. Subsequently, these conotoxins were synthesized by chemical solid-phase and oxidative folding for further insecticidal activity validation, such as MTT assay, insect bioassay and homology modeling. The final results proved insecticidal activities of our achieved six conotoxins from the transcriptome-based dataset. Interestingly, two of them presented a lot of high insecticidal activity, which supports their usefulness for a trial as insecticides in field investigations. In summary, our present work provides a good example for high throughput development of biological insecticides on basis of the accumulated genomic resources.
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77
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Castro MEB, Melo FL, Tagliari M, Inglis PW, Craveiro SR, Ribeiro ZMA, Ribeiro BM, Báo SN. The genome sequence of Condylorrhiza vestigialis NPV, a novel baculovirus for the control of the Alamo moth on Populus spp. in Brazil. J Invertebr Pathol 2017; 148:152-161. [PMID: 28669710 DOI: 10.1016/j.jip.2017.06.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 06/22/2017] [Accepted: 06/27/2017] [Indexed: 10/19/2022]
Abstract
Condylorrhiza vestigialis (Lepidoptera: Cambridae), commonly known as the Brazilian poplar moth or Alamo moth, is a serious defoliating pest of poplar, a crop of great economic importance for the production of wood, fiber, biofuel and other biomaterials as well as its significant ecological and environmental value. The complete genome sequence of a new alphabaculovirus isolated from C. vestigialis was determined and analyzed. Condylorrhiza vestigialis nucleopolyhedrovirus (CoveNPV) has a circular double-stranded DNA genome of 125,767bp with a GC content of 42.9%. One hundred and thirty-eight putative open reading frames were identified and annotated in the CoveNPV genome, including 38 core genes and 9 bros. Four homologous regions (hrs), a feature common to most baculoviruses, and 19 perfect and imperfect direct repeats (drs) were found. Phylogenetic analysis confirmed that CoveNPV is a Group I Alphabaculovirus and is most closely related to Anticarsia gemmatalis multiple nucleopolyhedrovirus (AgMNPV) and Choristoneura fumiferana DEF multiple nucleopolyhedrovirus CfDEFMNPV. The gp37 gene was not detected in the CoveNPV genome, although this gene is found in many NPVs. Two other common NPV genes, chitinase (v-chiA) and cathepsin (v-cath), that are responsible for host insect liquefaction and melanization, were also absent, where phylogenetic analysis suggests that the loss these genes occurred in the common ancestor of AgMNPV, CfDEFMNPV and CoveNPV, with subsequent reacquisition of these genes by CfDEFMNPV. The molecular biology and genetics of CoveNPV was formerly very little known and our expectation is that the findings presented here should accelerate research on this baculovirus, which will facilitate the use of CoveNPV in integrated pest management programs in Poplar crops.
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Affiliation(s)
| | - Fernando L Melo
- Departamento de Biologia Celular, Universidade de Brasília, Brasília, DF, Brazil
| | - Marina Tagliari
- Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, Brazil; Departamento de Biologia Celular, Universidade de Brasília, Brasília, DF, Brazil
| | - Peter W Inglis
- Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, Brazil
| | - Saluana R Craveiro
- Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, Brazil; Departamento de Biologia Celular, Universidade de Brasília, Brasília, DF, Brazil
| | | | - Bergmann M Ribeiro
- Departamento de Biologia Celular, Universidade de Brasília, Brasília, DF, Brazil
| | - Sônia N Báo
- Departamento de Biologia Celular, Universidade de Brasília, Brasília, DF, Brazil
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78
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Microscopic investigation of AcMNPV infection in the Trichoplusia ni midgut. J Invertebr Pathol 2016; 141:24-33. [DOI: 10.1016/j.jip.2016.10.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 10/14/2016] [Accepted: 10/25/2016] [Indexed: 11/21/2022]
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