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Abstract
The sequence of Junonia coenia densovirus was the first densovirus genome sequence published, but the first published sequence contained incomplete inverted terminal repeats and ambiguous nucleotides or indels leading to an incorrect map of the open reading frames. Our sequencing of clones of the complete genome demonstrated that this virus is closely related to other viruses in the Densovirus genus.
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2
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Dearing S, Scotti P, Wigley P, Dhana S. A small RNA virus isolated from the grass grub, Costelytra zealandica (Coleoptera: Scarabaeidae). NEW ZEALAND JOURNAL OF ZOOLOGY 2012. [DOI: 10.1080/03014223.1980.10423785] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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3
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Gallagher TM, Friesen PD, Rueckert RR. Autonomous replication and expression of RNA 1 from black beetle virus. J Virol 2010; 46:481-9. [PMID: 16789241 PMCID: PMC255150 DOI: 10.1128/jvi.46.2.481-489.1983] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Black beetle virions contain two RNAs. The smaller one, RNA 2, has previously been shown to be a messenger for viral coat protein. It is shown here, by infecting sensitized Drosophila cells with the individually purified RNAs, that the larger one, RNA 1, carries the viral gene(s) required for RNA polymerase functions. RNA 2 was dispensible for synthesis of viral RNA 1 and subgenomic RNA 3 but was essential for synthesis of RNA 2 and virions. Cells infected with RNA 1 alone produced RNA 3 in proportions 10- to 20-fold greater than cells infected with virions. This overproduction of RNA 3 decreased with increasing proportions of RNA 2 in the infecting RNA 1. We conclude that RNA 1 is the previously unidentified progenitor of subgenomic RNA 3, whereas RNA 2 regulates the amount of RNA 3 produced in the infected cell.
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Affiliation(s)
- T M Gallagher
- Biophysics Laboratory of the Graduate School and Department of Biochemistry of the College of Agricultural and Life Sciences, University of Wisconsin, Madison, Wisconsin 53706
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4
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Friesen PD, Rueckert RR. Synthesis of Black Beetle Virus Proteins in Cultured Drosophila Cells: Differential Expression of RNAs 1 and 2. J Virol 2010; 37:876-86. [PMID: 16789207 PMCID: PMC171083 DOI: 10.1128/jvi.37.3.876-886.1981] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Black beetle virus is an insect virus with a split genome consisting of two single-stranded, messenger-active RNA molecules with molecular weights of 1.0 x 10(6) (RNA 1) and 0.5 x 10(6) (RNA 2), respectively. Virions contained two proteins, beta with a molecular weight of 43,000 (43K) and gamma (5K), and traces of a third protein, alpha (47K). When translated in cell-free extracts of rabbit reticulocytes, RNA 1 directed the synthesis of protein A (104K), whereas RNA 2 synthesized protein alpha. The in vitro translation efficiency of the two RNAs was roughly equal. Infection of cultured Drosophila cells induced the synthesis of five new proteins: A, alpha, beta, gamma, and B (10K), detected by autoradiography of polyacrylamide gels after electrophoresis of extracts from [(35)S]methionine-labeled cultures. All but protein gamma could also be detected by staining with Coomassie brilliant blue, indicating vigorous synthesis of viral proteins. Pulse-chase experiments in infected cells revealed the disappearance of protein alpha and the coordinate appearance of proteins beta and gamma, supporting an earlier proposal that coat protein of mature virions is made by cleavage of precursor alpha. Proteins A and B were stable in such pulse-chase experiments. The three classes of virus-induced proteins, represented by A, B, and alpha, were synthesized in markedly different amounts and with different kinetics. Synthesis of proteins A and B peaked early in infection and then declined, whereas synthesis of coat protein precursor alpha peaked much later. These results suggest that RNA 1 controls early replication functions via protein A (and also possibly protein B), whereas RNA 2 controls synthesis of coat protein required later for virion assembly.
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Affiliation(s)
- P D Friesen
- Biophysics Laboratory, Graduate School, and Department of Biochemistry, College of Agricultural and Life Sciences, University of Wisconsin-Madison, Madison, Wisconsin 53706
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5
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Moore NF, Reavy B, Pullin JS, Plus N. The polypeptides induced in Drosophila cells by Drosophila C virus (strain Ouarzazate). Virology 2008; 112:411-6. [PMID: 18635073 DOI: 10.1016/0042-6822(81)90288-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/03/1981] [Indexed: 10/26/2022]
Abstract
The Ouarzazate strain of Drosophila virus (DCV0) was grown in Drosophila melanogaster tissue culture cells, and [35S]methionine-labeled virions were found to contain a group of major structural proteins with a molecular weight of approximately 30,000 as well as several minor proteins of higher molecular weight and a protein of approximately 10,000 daltons. Using a range of pulses, chases and gel systems, examination of the intracellular proteins induced by DCV0 showed the presence of 17 polypeptides not found in uninfected cells. The synthesis of virus-induced polypeptides was extremely asymmetric with a rapid appearance of the major virus structural proteins and a much slower appearance of the lowest molecular weight structural protein (VP4). Processing of virus-induced proteins including the appearance of VP4 was demonstrated using pulse-chase after pulsing with [35S]methionine. While the highest molecular weight induced protein found in infected cells was 146,000, pretreatment of cells with iodoacetamide resulted in the appearance of a protein with a molecular weight of approximately 200,000. The evidence presented in this paper supports the inclusion of DCV0 in the Picornaviridae group.
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Affiliation(s)
- N F Moore
- Natural Environment Research Council, Institute of Virology, 5 South Parks Road, Oxford OX1 3UB, United Kingdom
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6
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D'Arcy CJ, Burnett PA, Hewings AD, Goodman RM. Purification and characterization of a virus from the aphid Rhopalosiphum padi. Virology 2008; 112:346-9. [PMID: 18635071 DOI: 10.1016/0042-6822(81)90640-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/09/1981] [Indexed: 10/26/2022]
Abstract
A 27-nm icosahedral virus was purified from the oat bird cherry aphid, Rhopalosiphum padi (L.). The virus had an s(20,w) of 162 +/- 2 S, and bouyant densities of 1.37 in CsCl and 1.35 in Cs2SO4. It contained one ssRNA of 31 +/- 2 S and three major proteins. The relationship of the R. padi virus to other small RNA invertebrate viruses is unclear.
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Affiliation(s)
- C J D'Arcy
- Department of Plant Pathology, University of Illinois, Urbana, Illinois 61801, USA
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7
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Royer C, Bossin H, Romane C, Bergoin M, Couble P. High amplification of a densovirus-derived vector in larval and adult tissues of Drosophila. INSECT MOLECULAR BIOLOGY 2001; 10:275-280. [PMID: 11437919 DOI: 10.1046/j.1365-2583.2001.00264.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The Lepidopteran densovirus-derived vector, pJlacZDeltaNS3, is a defective virus genome with an insertion of lacZ DNA in the viral structural protein coding sequence, and a deletion of the sequence coding the non-structural polypeptide NS3. pJlacZDeltaNS3 was injected into Drosophila eggs and the maintenance of the viral genome was monitored by expression of beta-galactosidase and by Southern blot hybridizations. Intense beta-galactosidase activity was observed in many somatic tissues of third-instar larvae and adult flies, in more than 60% of the injected animals. DNA analyses showed that staining in adult tissues correlated with the amplification of the vector. Together, these results suggest the occurrence of early events of integration of the vector into the Drosophila host genome.
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Affiliation(s)
- C Royer
- Unité Nationale Séricicole, INRA, La Mulatière, Villeurbanne Cedex, France.
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8
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9
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Gildow F, D'Arcy C. Cytopathology and experimental host range of Rhopalosiphum padi virus, a small isometric RNA virus infecting cereal grain aphids. J Invertebr Pathol 1990. [DOI: 10.1016/0022-2011(90)90060-j] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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10
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Bashiruddin JB, Martin JL, Reinganum C. Queensland fruit fly virus, a probable member of the Picornaviridae. Arch Virol 1988; 100:61-74. [PMID: 3133998 DOI: 10.1007/bf01310908] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A picornavirus was isolated from various life stages of the Queensland fruit fly, Dacus tryoni. This virus, Queensland fruit fly virus (QFFV) has virions with a diameter of 30 nm and a sedimentation coefficient of 178 S. One third of the particles in preparations were empty capsids or natural top component (NTC) with a sedimentation coefficient of 95 S. The buoyant density (rho) of virions and NTC in CsCl was 1.34 and 1.30 g/ml respectively; small amounts of a dense component (rho = 1.45 g/ml) were also detected. The capsid contained three major protein species of molecular weight (mol.wt.) 41,700, 36,500, and 31,300, in approximately equimolar proportions. NTC contained three major species of mol. wt. 44,700, 41,700, and 31,300. The nucleic acid present only in the bottom component virions was RNA and comprised about 30% of the particle weight and had a mol. wt of 2.88 kd, contained a poly(A) tract, and had a base ratio: G = 20; A = 32; C = 15; U = 33. The mol. wt. of the virion was estimated to be approximately equal to 9.5 kd. When virions were heated at 56 degrees C and above, they converted into artificial top component (ATC), which had the same protein composition as the virion when analysed by SDS-PAGE. In immunodiffusion tests the virions and NTC were indistinguishable, but a minor difference in antigenicity was detected between the virions and ATC. Virions were stable between pH 3 and 9 inclusive, and between 5 and 7 in the presence of 0.14 M NaCl. Immunodiffusion tests showed that QFFV was serologically unrelated to a range of picornaviruses as well as an unclassified virus isolated from the Mediterranean fruit fly, Ceratitis capitata. The data show that QFFV is probably a member of the Picornaviridae, genus Enterovirus.
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Affiliation(s)
- J B Bashiruddin
- Department of Microbiology, Monash University Medical School, Prahran, Victoria, Australia
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11
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12
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Binnington K, Lockie E, Hines E, van Gerwen A. Fine structure and distribution of three types of virus-like particles in the sheep blowfly, Lucilia cuprina and associated cytopathic effects. J Invertebr Pathol 1987. [DOI: 10.1016/0022-2011(87)90158-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Scotti PD, Fredericksen S. Manawatu virus: a nodavirus isolated from Costelytra zealandica (white) (Coleoptera: Scarabaeidae). Arch Virol 1987; 97:85-92. [PMID: 3120676 DOI: 10.1007/bf01310736] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
An insect virus, called Manawatu virus (MwV), was isolated from a larva of the New Zealand grass grub Costelytra zealandica (White) (Coleoptera: Scarabaeidae). MwV was serologically related, but not identical, to several insect nodaviruses. The single capsid protein of MwV was 40,000 MW, the same as black beetle virus (BBV), but virus particles had a different electrophoretic mobility from BBV. The bipartite RNA genome, like other nodaviruses, consisted of two species of MW 1.1 and 0.46 million. MwV particles sedimented at 142 S and had an estimated density in neutral CsCl of 1.366 g/ml compared with 1.352 g/ml for BBV. The serological and physico-chemical properties, compared with other nodaviruses, indicate that MwV is unique.
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Affiliation(s)
- P D Scotti
- Department of Scientific and Industrial Research, Mt. Albert Research Centre, Auckland, New Zealand
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14
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Characterization of a picornavirus isolated from Pseudoplusia includens (Lepidoptera: Noctuidae). J Invertebr Pathol 1986. [DOI: 10.1016/0022-2011(86)90094-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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17
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Dasgupta R, Ghosh A, Dasmahapatra B, Guarino LA, Kaesberg P. Primary and secondary structure of black beetle virus RNA2, the genomic messenger for BBV coat protein precursor. Nucleic Acids Res 1984; 12:7215-23. [PMID: 6548308 PMCID: PMC320152 DOI: 10.1093/nar/12.18.7215] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The nucleotide sequence of black beetle virion (BBV) RNA2 has been determined. RNA2 is 1399 b long. Its 5' terminus is capped. Its 3' terminus has an unidentified moiety that renders the RNA resistent to polyadenylation and ligation. The first AUG codon at base 23 is followed by an open reading frame for a protein 407 amino acids long, the predicted size of coat protein precursor. A second open reading frame for a putative protein 72 amino acid residues long begins at base 1110. No other large open reading frames exist. The 5' half of the RNA can be folded into a long, imperfect hairpin of high predicted stability. The 3' half of the RNA can fold into a complex set of multiply bifurcated stem and loop regions.
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Bando H, Kondo N, Kawase S. Molecular homology among the structural proteins of densonucleosis virus from silkworm, Bombyx mori. Arch Virol 1984; 80:209-18. [PMID: 6721678 DOI: 10.1007/bf01310660] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Similarities among the four structural proteins of Bombyx densonucleosis virus (DNV) were examined by four independent techniques, peptide mapping, immunodiffusion tests, amino acid analysis and enzyme linked immunosorbent (ELISA) technique. The peptide maps produced by Staphylococcus aureus V8 protease, or chymotrypsin indicated the existence of sequence homology among the proteins. The results of immunodiffusion tests revealed that these four structural proteins share common antigens. The amino acid compositions of these proteins were also very similar to each other. However, the amount of amino acid residues (e.g., serine) in VP3 was not always sufficient to account for the amount found in the smaller structural protein, VP2. These results indicate that the four structural proteins of Bombyx DNV probably originate, at least partially, from a common DNA sequence, and that VP2 is not a direct cleavage product of VP3.
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19
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A picornavirus-like pathogen of Cotylogaster occidentalis (Trematoda: Aspidogastrea), an intestinal parasite of freshwater mollusks. J Invertebr Pathol 1984. [DOI: 10.1016/0022-2011(84)90138-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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20
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Hosur MV, Schmidt T, Tucker R, Johnson JE, Selling BH, Rueckert RR. Black beetle virus—crystallization and particle symmetry. Virology 1984; 133:119-27. [DOI: 10.1016/0042-6822(84)90430-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/1983] [Accepted: 10/21/1983] [Indexed: 12/01/2022]
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21
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Reavy B, Moore NF. The gene organisation of a small RNA-containing insect virus: comparison with that of mammalian picornaviruses. Virology 1983; 131:551-4. [PMID: 6659369 DOI: 10.1016/0042-6822(83)90520-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The coding regions of an insect virus, cricket paralysis virus, have been mapped using pactamycin. The results suggest that the genome of this virus functions as a polycistronic mRNA, the structural proteins being encoded by the 5' end of the RNA in an order similar to those of mammalian picornaviruses. High-molecular-weight proteins of unknown function map at the 3' end of the genome.
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23
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Pullin JS, Moore NF, Clewley JP, Avery RJ. Comparison of the genomes of two insect picornaviruses, cricket paralysis virus andDrosophilaC virus, by ribonuclease T1oligonucleotide fingerprinting. FEMS Microbiol Lett 1982. [DOI: 10.1111/j.1574-6968.1982.tb00070.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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24
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Friesen PD, Rueckert RR. Black Beetle Virus: Messenger for Protein B Is a Subgenomic Viral RNA. J Virol 1982; 42:986-95. [PMID: 16789225 PMCID: PMC256932 DOI: 10.1128/jvi.42.3.986-995.1982] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Black beetle virus induces the synthesis of three new proteins, protein A (molecular weight, 104,000), protein α (molecular weight, 47,000), and protein B (molecular weight, 10,000), in infected
Drosophila
cells. Two of these proteins, A and α, are known to be encoded by black beetle virus RNAs 1 and 2, respectively, extracted from virions. We found that RNA extracted from infected cells directed the synthesis of all three proteins when it was added to a cell-free protein-synthesizing system. When polysomal RNA was fractionated on a sucrose density gradient, the messengers for proteins A and α cosedimented with viral RNAs 1 (22S) and 2 (15S), respectively. However, the messenger for protein B was a 9S RNA (RNA 3) not found in purified virions. Like the synthesis of viral RNAs 1 and 2, intracellular synthesis of RNA 3 was not affected by the drug actinomycin D at concentrations which blocked synthesis of host cell RNA. This indicated that RNA 3 is a virus-specific subgenomic RNA and, therefore, that protein B is a virus-encoded protein.
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Affiliation(s)
- P D Friesen
- Biophysics Laboratory, Graduate School, and Department of Biochemistry, College of Agricultural and Life Sciences, University of Wisconsin, Madison, Wisconsin 53706
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25
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Moore NF, Pullin JS, Crump WA, Plus N. The proteins expressed by different isolates of Drosophila C virus. Arch Virol 1982; 74:21-30. [PMID: 6297428 DOI: 10.1007/bf01320779] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Isolates of Drosophila C virus (DCV) from Drosophila flies obtained in geographically different regions were adapted to growth in Drosophila tissue culture cells. The viruses, purified from tissue culture cells, were shown to be serologically related to one of the isolates ("O" from Ouarzazate, Morocco). Analysis of the structural proteins by polyacrylamide gel electrophoresis demonstrated differences between the isolates. Labelling intracellular proteins of infected Drosophila melanogaster cells with 35S-methionine at 28 degrees C demonstrated the presence of the virus structural proteins and their immediate precursors. Raising the temperature to 37 degrees C both before and during the pulse period inhibited the processing of the high molecular weight proteins and resulted in a greater "shut-off" of host cell proteins than viral induced proteins. This allowed the precursor proteins to be compared as well as the structural proteins of the different strains. It was possible to clearly distinguish differences between the isolates on the basis of the induced proteins, although limited proteolysis of corresponding proteins showed marked similarities. Hence it is possible to distinguish between different isolates of the "same" small RNA-virus of insects from geographically different regions.
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26
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An RNA virus in Autographa californica nuclear polyhedrosis preparations: Detection and identification. J Invertebr Pathol 1981. [DOI: 10.1016/0022-2011(81)90123-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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27
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Kellen WR, Hoffmann DF. A pathogenic nonoccluded virus in hemocytes of the navel orangeworm, Amyelois transitella (Pyralidae: Lepidoptera). J Invertebr Pathol 1981. [DOI: 10.1016/0022-2011(81)90034-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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28
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Moore NF, Reavy B, Pullin JS. Processing of cricket paralysis virus induced polypeptides in Drosophila cells: production of high molecular weight polypeptides by treatment with iodoacetamide. Arch Virol 1981; 68:1-8. [PMID: 6788024 DOI: 10.1007/bf01315161] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Infection of Drosophila cells with Cricket paralysis virus in the presence of Actinomycin D results in virtual complete inhibition of host cell protein synthesis by four hours post-infection. Using 35S-methionine or 14C-amino acids to pulse infected cells three major classes of viral induced proteins can be detected, (A) high molecular weight precursor proteins, (B) viral structural proteins and (C) low molecular weight cleavage products. The large number of high molecular weight proteins found in the infected cells suggests that a multiple cleavage cascade mechanism is partially utilized to produce virus structural proteins. In infected cells, even with short pulses, the largest viral induced protein obtained has a molecular weight of 144,000. However with pretreatment of the infected cells with iodoacetamide before pulsing, two further proteins are obtained with molecular weights of 205,000 and 190,000. Other changes occur in viral protein precursors in the presence of iodoacetamide.
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Moore NF, McKnight L, Tinsley TW. Occurrence of antibodies against insect virus proteins in mammals: simple model to differentiate between passive exposure and active virus growth. Infect Immun 1981; 31:825-7. [PMID: 6260677 PMCID: PMC351384 DOI: 10.1128/iai.31.2.825-827.1981] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Antibodies against an "enterovirus-like" virus of insects, cricket paralysis virus, occur in the sera of domestic animals. When these antibodies were used in combination with the immunoprecipitation of radiolabeled virus proteins from infected Drosophila cells in culture, it could be demonstrated that the animals were exposed to preformed virus.
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Scotti PD, Longworth JF, Plus N, Croizier G, Reinganum C. The biology and ecology of strains of an insect small RNA virus complex. Adv Virus Res 1981; 26:117-43. [PMID: 7223541 DOI: 10.1016/s0065-3527(08)60422-4] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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31
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Tijssen P, Kurstak E. Biochemical, biophysical, and biological properties of densonucleosis virus (parvovirus). III. common sequences of structural proteins. J Virol 1981; 37:17-23. [PMID: 7218424 PMCID: PMC170977 DOI: 10.1128/jvi.37.1.17-23.1981] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Densonucleosis virus cannot code for its four structural proteins if each of them has a unique sequence. The objective of the present investigation, therefore, was to establish whether: (i) the viral genome contains overlapping genes; (ii) the virus incorporates host proteins; or (iii) one of the structural proteins is a dimer. Two independent methods were employed for this purpose. First, the viral proteins, solubilized in sodium dodecyl sulfate, were purified after dansylation and were analyzed by peptide mapping, using sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Second, an enzyme-linked immunosorbent assay was developed for a comparative analysis of the viral proteins solubilized by sodium dodecyl sulfate. It was demonstrated with both techniques that densonucleosis virus has four unique structural proteins, all with extensive sequence homologies. Moreover, all structural proteins contained intraprotein, but no interprotein, disulfide linkages. These results indicated similarities between densonucleosis virus and representatives of the two other genera of the Parvoviridae.
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Nakagaki M, Kawase S. Structural proteins of densonucleosis virus isolated from the silkworm, Bombyx mori, infected with the flacherie virus. J Invertebr Pathol 1980. [DOI: 10.1016/0022-2011(80)90020-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Moore NF, Kearns A, Pullin JS. Characterization of Cricket Paralysis Virus-Induced Polypeptides in
Drosophila
Cells. J Virol 1980; 33:1-9. [PMID: 16789183 PMCID: PMC288518 DOI: 10.1128/jvi.33.1.1-9.1980] [Citation(s) in RCA: 65] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Cricket paralysis virus purified from
Galleria mellonella
larvae was shown to be similar to virus purified from
Drosophila melanogaster
cells. Cricket paralysis virus contained three major structural polypeptides of similar molecular weight (around 30,000), had a buoyant density of 1.344 g/ml, and had a capsid diameter of 27 nm. Twenty virus-induced polypeptides could be detected in CrPV-infected
Drosophila
cells. Two major polypeptides found in the infected cells corresponded to two structural viral polypeptides (VP1 and VP3), whereas the third major intracellular polypeptide was the apparent precursor of the third viral structural polypeptide (VP2). Three of the primary virus-induced polypeptides had molecular weights of 144,000, 124,000, and 115,000. These and other polypeptides were chased into lower-molecular-weight proteins when excess cold methionine was added after a short [
35
S]methionine pulse. Although cricket paralysis virus has a number of characteristics in common with the mammalian enteroviruses, the extremely fast processing of high-molecular-weight polypeptides into viral proteins seems atypical. Also, no VP4 (8,000 to 10,000 molecular weight) has been found in the virus particles.
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Affiliation(s)
- N F Moore
- Natural Environment Research Council, Unit of Invertebrate Virology, Oxford OX1 3UB, United Kingdom
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