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AcMNPV P74 is cleaved at R325 and R334 by proteinases of both OB and BBMV to expose a potential fusion peptide for oral infection.
J Virol
June 2024
Key Laboratory of Virology and Biosafety, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China.
Unlabelled: Baculoviruses enter insect midgut epithelial cells via a set of occlusion-derived virion (ODV) envelope proteins called infectivity factors (PIFs). P74 of Autographa californica multicapsid nucleopolyhedrovirus (AcMNPV), which was the first identified PIF, is cleaved by an endogenous proteinase embedded within the occlusion body during infection, but the target site(s) and function of the cleavage have not yet been ascertained. Here, based on bioinformatics analyses, we report that cleavage was predicted at an arginine and lysine-rich region in the middle of P74.
View Article and Find Full Text PDFEnhanced virulence of genetically engineered Autographa californica nucleopolyhedrovirus owing to accelerated viral DNA replication aided by inserted ascovirus genes.
Pestic Biochem Physiol
May 2023
Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, Hunan 410128, PR China; College of Plant Protection, Hunan Agricultural University, Changsha, Hunan 410128, PR China. Electronic address:
Article Synopsis
- Genetic engineering was used to introduce six ascovirus genes into Autographa californica nucleopolyhedrovirus (AcMNPV) to enhance its insecticidal properties by combining traits from both viruses.
- The modified viruses, AcMNPV-111 and AcMNPV-165, showed higher viral production and insecticidal efficiency, significantly reducing the time (LT) and dose (LD) needed to impact Spodoptera exigua larvae compared to the wild-type AcMNPV-Egfp.
- The study demonstrated that these recombinant viruses have stable virulence across different instar larvae, with recommendations for optimal infection doses to maximize the production of these enhanced baculoviruses for use as biological insect
Effects of midgut bacteria in Hyphantria cunea (Lepidoptera: Erebidae) on nuclear polyhedrosis virus and Bacillus thuringiensis (Bacillales: Bacillaceae).
J Insect Sci
March 2023
Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China.
Hyphantria cunea Drury (Lepidoptera: Erebidae) is a quarantine pest in China that can cause damage to hundreds of plants. As biological control agents, Nuclear Polyhedrosis Virus (NPV) and Bacillus thuringiensis Berliner (Bacillales: Bacillaceae) (Bt) are commonly used to inhibit the prevalence of H. cunea.
View Article and Find Full Text PDFBiological, morphological, and molecular characterization of the baculovirus PlxyMNPV_LBIV-11, and its virulence towards Plutella xylostella, Trichoplusia ni, and Spodoptera frugiperda larvae.
Arch Microbiol
September 2022
Departamento de Alimentos and Posgrado en Biociencias, División de Ciencias de la Vida, Campus Irapuato Salamanca, Universidad de Guanajuato, Ex Hacienda El Copal, Km. 9.0 Carretera Irapuato-Silao. 36500 Irapuato, Guanajuato, México.
PlxyMNPV_LBIV-11 is an alphabaculovirus strain, isolated from Plutella xylostella larvae. This work characterized this strain at a biological, morphological, and molecular level to evaluate its similarity with other baculoviruses. Its ultrastructure showed a multiple arrangement of nucleocapsids within enveloped virions, all occluded within large cubical polyhedra.
View Article and Find Full Text PDFComparative Pathogenesis of Generalist AcMNPV and Specific RanuNPV in Larvae of Rachiplusia nu (Lepidoptera: Noctuidae) Following Single and Mixed Inoculations.
J Econ Entomol
April 2021
Instituto de Microbiología y Zoología Agrícola (IMyZA), Centro de Investigaciones en Ciencias Veterinarias y Agronómicas (CICVyA), Instituto Nacional de Tecnología Agropecuaria (INTA), Nicolás Repetto y de los Reseros s/n, 1686 Hurlingham, Argentina.
The South American soybean pest, Rachiplusia nu (Guenée), is naturally infected by Autographa californica multiple nucleopolyhedrovirus (AcMNPV) and Rachiplusia nu nucleopolyhedrovirus (RanuNPV). We compared their pathogenicity to fourth-instar R. nu larvae, by evaluating time to death and virus spread throughout the tissues in single and mixed infections.
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