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Intracellular Localization of Blattella germanica Densovirus (BgDV1) Capsid Proteins. Viruses 2018; 10:v10070370. [PMID: 30011943 PMCID: PMC6071259 DOI: 10.3390/v10070370] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 07/10/2018] [Accepted: 07/12/2018] [Indexed: 01/16/2023] Open
Abstract
Densovirus genome replication and capsid assembly take place in the nucleus of the infected cells. However, the mechanisms underlying such processes as the delivery of virus proteins to the nucleus and the export of progeny virus from the nucleus remain elusive. It is evident that nuclear transport signals should be involved in these processes. We performed an in silico search for the putative nuclear localization signal (NLS) and nuclear export signal (NES) motifs in the capsid proteins of the Blattella germanica Densovirus 1 (BgDV1) densovirus. A high probability NLS motif was found in the common C-terminal of capsid proteins together with a NES motif in the unique N-terminal of VP2. We also performed a global search for the nuclear traffic signals in the densoviruses belonging to five Densovirinae genera, which revealed high diversity in the patterns of NLSs and NESs. Using a heterologous system, the HeLa mammalian cell line expressing GFP-fused BgDV1 capsid proteins, we demonstrated that both signals are functionally active. We suggest that the NLS shared by all three BgDV1 capsid proteins drives the trafficking of the newly-synthesized proteins into the nucleus, while the NES may play a role in the export of the newly-assembled BgDV1 particles into the cytoplasm through nuclear pore complexes.
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Gene expression of five different iteradensoviruses: Bombyx mori densovirus, Casphalia extranea densovirus, Papilio polyxenes densovirus, Sibine fusca densovirus, and Danaus plexippus densovirus. J Virol 2014; 88:12152-7. [PMID: 25078704 DOI: 10.1128/jvi.01719-14] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Iteradensoviruses are 5-kb parvoviruses with typical J-shaped inverted terminal repeats of about 250 nucleotides and terminal hairpins of about 165 nucleotides. The single-stranded DNA genome contains several open reading frames, but their expression strategy is still unknown. Here the transcription maps and expression of the viruses in this genus were explored. As for brevidensoviruses, the two nonstructural (NS) genes were expressed by overlapping promoters with alternate transcription starts at both sides of the NS1 start codon.
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Kouassi N, Peng JX, Li Y, Cavallaro C, Veyrunes JC, Bergoin M. Pathogenicity of diatraea saccharalis densovirus to host insets and characterization of its viral genome. Virol Sin 2009. [DOI: 10.1007/s12250-007-0062-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Fédière G, Li Y, Zádori Z, Szelei J, Tijssen P. Genome organization of Casphalia extranea densovirus, a new iteravirus. Virology 2002; 292:299-308. [PMID: 11878932 DOI: 10.1006/viro.2001.1257] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The viral genome of Casphalia extranea densovirus (CeDNV) has been cloned and sequenced. It was 5002 nucleotides long and contained inverted terminal repeats of 230 nucleotides. Their distal 159 nucleotides formed imperfect palindromes in two orientations. Three large open reading frames (ORFs) were identified on the same strand, two in the left-hand half and one in the right-hand half. Each of the five structural proteins, expressed from the right-hand ORF in the baculovirus system, autoassembled into capsids. The two left-hand ORFs overlapped and code for nonstructural (NS) proteins. NS1 protein was shown to contain replicator protein and helicase/ATPase motifs. The PGY region in VP1 capsid protein is conserved among most parvoviruses and contained a phospholipase A(2) motif, a novel viral enzyme. This domain was expressed and its enzyme activity was demonstrated. The approximate 75% sequence identity between the DNAs from CeDNV and BmDNV-1 and identical genome organization indicated that CeDNV should be classified in the Iteravirus genus.
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Affiliation(s)
- G Fédière
- Centre de Recherche de Microbiologie et Biotechnologie, INRS---Institut Armand-Frappier, Université du Québec, 531 boulevard des Prairies, Laval, Quebec, Canada H7V 1B7
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Li Y, Zádori Z, Bando H, Dubuc R, Fédière G, Szelei J, Tijssen P. Genome organization of the densovirus from Bombyx mori (BmDNV-1) and enzyme activity of its capsid. J Gen Virol 2001; 82:2821-2825. [PMID: 11602795 DOI: 10.1099/0022-1317-82-11-2821] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Bombyx mori densovirus (BmDNV-1), on the basis of the previously reported genome sequence, constitutes by itself a separate genus (Iteravirus) within the Densovirinae subfamily of parvoviruses. Inconsistencies in the genome organization, however, necessitated its reassessment. The genome sequence of new clones was determined and resulted in a completely different genome organization. The corrected sequence also contained conserved sequence motifs found in other parvoviruses. Some amino acids in the highly conserved domain in the unique region of VP1 were shared by critical amino acids in the catalytic site and Ca(2+)-binding loop of secreted phospholipase A2, such as from snake and bee venoms. Expression of this domain and determination of enzyme activity demonstrated that capsids have a phospholipase A2 activity thus far unknown to occur in viruses. This viral phospholipase A2, which is required shortly after entry into the cell, showed a substrate preference for phosphatidylethanolamine and phosphatidylcholine over phosphatidylinositol.
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Affiliation(s)
- Y Li
- Centre de recherche de microbiologie et biotechnologie, INRS-Institut Armand-Frappier, Université du Québec, 531 boul. des Prairies, Laval, QC, CanadaH7V 1B71
| | - Z Zádori
- Centre de recherche de microbiologie et biotechnologie, INRS-Institut Armand-Frappier, Université du Québec, 531 boul. des Prairies, Laval, QC, CanadaH7V 1B71
| | - H Bando
- Department of Bioscience, Faculty of Agriculture, Hokkaido University, Sapporo, Japan2
| | - R Dubuc
- Centre de recherche de microbiologie et biotechnologie, INRS-Institut Armand-Frappier, Université du Québec, 531 boul. des Prairies, Laval, QC, CanadaH7V 1B71
| | - G Fédière
- Center of Virology-IRD, Faculty of Agriculture, University of Cairo, Giza, Cairo, Egypt3
- Centre de recherche de microbiologie et biotechnologie, INRS-Institut Armand-Frappier, Université du Québec, 531 boul. des Prairies, Laval, QC, CanadaH7V 1B71
| | - J Szelei
- Centre de recherche de microbiologie et biotechnologie, INRS-Institut Armand-Frappier, Université du Québec, 531 boul. des Prairies, Laval, QC, CanadaH7V 1B71
| | - P Tijssen
- Centre de recherche de microbiologie et biotechnologie, INRS-Institut Armand-Frappier, Université du Québec, 531 boul. des Prairies, Laval, QC, CanadaH7V 1B71
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Corsini J, Afanasiev B, Maxwell IH, Carlson JO. Autonomous parvovirus and densovirus gene vectors. Adv Virus Res 1996; 47:303-51. [PMID: 8895835 DOI: 10.1016/s0065-3527(08)60738-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- J Corsini
- Department of Microbiology, Colorado State University, Fort Collins 80523, USA
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Hu Y, Zheng J, Iizuka T, Bando H. A densovirus newly isolated from the smoky-brown cockroach Periplaneta fuliginosa. Arch Virol 1994; 138:365-72. [PMID: 7998841 DOI: 10.1007/bf01379139] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We purified a causing agent of fetal disease for smoky-brown cockroach Periplaneta fuliginosa, which was designated as "cockroach small spherical virus (CSSV)". Purified virus particles had a diameter of 22 +/- 0.6 nm and contained DNA as a single-stranded form. However, the extraction of DNA under condition of appropriate high salt and elevated temperature yielded a double-stranded DNA with a size of 5,500 nucleotides. These results were quite similar to those of other densoviruses (DNVs). The CSSV had five structural proteins (VP1: 52 KDa, VP2: 56 KDa, VP3: 79 KDa, VP4: 82 KDa, and VP5: 105 KDa). The SDS-PAGE profile of these proteins was quite different from that of the cockroach DNV previously reported and was rather similar to that of Bombyx mori (Bm) DNV-1. An immunochemical study, however, demonstrated that there was no immunological relationship between the CSSV and the Bm DNV-1. These data suggest that the CSSV is a new member of DNV.
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Affiliation(s)
- Y Hu
- Department of Virology, Wuhan University, China
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Dumas B, Jourdan M, Pascaud AM, Bergoin M. Complete nucleotide sequence of the cloned infectious genome of Junonia coenia densovirus reveals an organization unique among parvoviruses. Virology 1992; 191:202-22. [PMID: 1413502 DOI: 10.1016/0042-6822(92)90182-o] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We previously constructed a recombinant plasmid, pBRJ, encompassing an infectious Junonia coenia densovirus (JcDNV) genome (M. Jourdan et al. (1990). Virology 179, 403-409). We report here the complete viral sequence of pBRJ. The genome, 5908 nucleotides (nt) long, consists of an internal unique sequence flanked by long (517 nt) inverted terminal repeats. The first 96 bases of one extremity can fold into a typical Y-shaped hairpin structure. The opposite extremity is incomplete, lacking 88 nt. These terminal structures, similar to those of dependoviruses, human parvovirus B19 and Bombyx mori densovirus (BmDNV), strongly suggest a common mechanism of DNA replication for these parvoviruses. JcDNV genomic organization is unique among parvoviruses in that coding sequences are evenly distributed in the 5' half of both strands. On one strand, the major open reading frame (ORF1) encodes the four structural proteins. On the complementary strand, ORF2, ORF3 (included in ORF2), and ORF4 probably encode nonstructural proteins. JcDNV genome has little DNA homology with vertebrate parvoviruses and surprisingly even less with the two densoviruses presently sequenced. ORF1 contains the highly conserved PGY and G-rich regions and ORF2 the NTP-binding domain common to most structural and to all nonstructural vertebrate parvoviral ORFs, respectively. The single homology between JcDNV and BmDNV is unexpectedly located in JcDNV NTP-binding domain and BmDNV ORF2 assumed to encode structural polypeptides. Only a weak homology exists between JcDNV and Aedes DNV in their NTP-binding domain.
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Affiliation(s)
- B Dumas
- Centre de Recherches Roussel Uclaf, Romainville, France
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Afanasiev BN, Galyov EE, Buchatsky LP, Kozlov YV. Nucleotide sequence and genomic organization of Aedes densonucleosis virus. Virology 1991; 185:323-36. [PMID: 1833875 DOI: 10.1016/0042-6822(91)90780-f] [Citation(s) in RCA: 79] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Over 99% of the genome of Aedes densonucleosis virus was determined. Two types of the viral DNA were found that differ only in four nucleotides (nt) in the 5' noncoding part and whose sizes are 4009 nt (more copious) and 4012 nt, respectively. Both 146 nt at the 3' end and 164 nt at the 5' end could assume a similar T-shaped structure; but unlike the adeno-associated virus, Aedes DNA has a unique primary DNA sequence at each terminus. However, the crossarms of these structures are built of the same sequences. An imperfect direct repeat of 34 nt was observed in the 5' noncoding part. The plus strand has three large open reading frames (ORF): a left ORF, a right ORF, and a mid ORF (within the left ORF). The left ORF codes for the nonstructural protein NS-1 (97.5K) featured by an NTP-binding domain, and the right ORF encodes the both capsid proteins, the smaller of which (39K) is supposed to be derived from the larger one (40.5K) by proteolytic cleavage. There is also an ORF in the minus strand. The putative polypeptide coded by this ORF is extremely hydrophobic.
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Affiliation(s)
- B N Afanasiev
- Engelhardt Institute of Molecular Biology, USSR Academy of Sciences, Moscow
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Jourdan M, Jousset FX, Gervais M, Skory S, Bergoin M, Dumas B. Cloning of the genome of a densovirus and rescue of infectious virions from recombinant plasmid in the insect host Spodoptera littoralis. Virology 1990; 179:403-9. [PMID: 2219730 DOI: 10.1016/0042-6822(90)90308-e] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We have cloned an infectious genome of the Junonia coenia densonucleosis virus (JcDNV) into the bacterial plasmid pBR322. The viral genome could be rescued from the recombinant plasmid pBRJ by transfection of pBRJ DNA to sensitive Spodoptera littoralis larvae. pBRJ DNA produced a typical viral infection and a comparable percentage of larvae became infected following inoculation of equivalent amounts of purified virion DNA or cloned viral DNA. Virions extracted from transfected larvae were indistinguishable from wild-type (wt) virions with regard to their biophysical and biological properties. In particular, rescued virions were as infectious as wt virions and showed identical restriction profiles of their genome. In contrast, subcloning of JcDNV DNA deleted at both extremities of a sequence of ca 250 or ca 100 bp resulted in the inability of the recombinant plasmids to initiate a viral infection. These data suggest that, as for vertebrate parvoviruses, the inverted terminal repeats display essential functions in the rescue process and replicative cycle of densoviruses. This is the first report of the molecular cloning of the infectious genome from an insect parvovirus, and more generally from an invertebrate virus. pBRJ should provide an efficient tool to further define the organization of the JcDNV genome and compare it to other parvoviruses.
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Affiliation(s)
- M Jourdan
- Station de Recherches de Pathologie Comparée INRA-UA CNRS 1184, Saint Christol-lez-Alès, France
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In vitro translation of RNA from the midgut of the silkworm, Bombyx mori, infected with a densonucleosis virus. J Invertebr Pathol 1988. [DOI: 10.1016/0022-2011(88)90134-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Bando H, Kusuda J, Gojobori T, Maruyama T, Kawase S. Organization and nucleotide sequence of a densovirus genome imply a host-dependent evolution of the parvoviruses. J Virol 1987; 61:553-60. [PMID: 3027382 PMCID: PMC253980 DOI: 10.1128/jvi.61.2.553-560.1987] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The genome structure of a densovirus from a silkworm was determined by sequencing more than 85% of the complete genome DNA. This is the first report of the genome organization of an insect parvovirus deduced from the DNA sequence. In the viral genome, two large open reading frames designated 1 and 2 and one smaller open reading frame designated 3 were identified. The first two open reading frames shared the same strand, while the third was found in the complementary sequence. Computer analysis suggested that open reading frame 2 may encode all four structural proteins. The genome organization and a part of the nucleotide sequence were conserved among the insect densovirus, rodent parvoviruses, and a human dependovirus. These viruses may have diverged from a common ancestor.
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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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