Download Citation on ResearchGate | On Jul 31, , Suzanne M. Thiem and others published Baculovirus Molecular Biology, second ed., George F. we examine the molecular evolution of baculoviruses and Blissard GW, Rohrmann GF. Baculovirus diversity and molecular biology. Baculoviruses have been exploited for the over expression of foreign gene in investigations of baculovirus molecular biology has been the development of . Vanarsdall, A.L., Pearson, M.N. and Rohrmann, G.F. () Characterization of.

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We have baculoviruz that it is related to a envelope fusion protein from a group of insect retroviruses. Except where otherwise indicated, this work is licensed under a Creative Commons Attribution 4.

We will examine whether DNA replication appears to be recombination-dependent in Trichoplusia ni cells which have significantly different properties from the Spodoptera frugiperda cells that we are currently employing. Probably, many of these sequences have been incorporated into viral genomes prior to diversification processes since they are found in members of different genera.

Thus, these new approaches were based baculovirjs the construction of common-protein-concatemers which were used to propose evolution patterns for baculoviruses [ ]. Project Director Rohrmann, G.

This is based on the assumption that Group I alphabaculoviruses have had less time to incorporate new sequences from different sources host genomes, other viral genomes, bacterial genomes, etc. Similar articles in PubMed. This likely occurred when they integrated into a baculovirus and obtained an envelope fusion protein.

For description of baculovirus homology, see text. Mostly, the evolutionary inferences were in agreement with much stronger subsequent studies based on sequence analyses derived from sets of genes with homologous sequences in all baculoviruses. In contrast, DNA generated by the alkaline nuclease knockout bacmid had much higher concentrations of sub-genome size DNA.

Western blot analyses of budded virus from cells infected with the repair viruses showed that these proteins are associated with the viral nucleocapsid.


Many of our mutants are able to replicate DNA to normal levels but are non-infectious because the DNA is not packaged or processed correctly. Baculoviridae is a large family of moldcular which infect and kill insect species from different orders. Overexpression, purification, and characterization of proteins. The data suggest that the AN endonuclease may digest the intermediates in replication and recombination at positions of structural irregularities in DNA duplexes, whereas LEF-3 may further regulate processing of the intermediates by AN via the endonuclease and exonuclease pathways.

Review [A novel application of baculovirus in mammalian gene therapy]. Phylogenetic relatedness of LEF8 biolpgy selected baculoviruses.

International Journal of Evolutionary Biology

Transcriptional mapping of two genes encoding baculovirus envelope-associated proteins. In any case, a set of particular genes which could help in an appropriate genus taxonomy of new baculoviruses with partial sequence information were obtained from this analysis. These estimations were inferred by Blast P algorithm http: Baculovirus Molecular Biology [Internet].

We have been able to demonstrate that it binds to synthetic DNA structures that are similar to those that would be expected for replication intermediates including cruciform-like structures.

Spontaneous excision of BAC vector sequences from bacmid-derived baculovirus expression vectors upon passage in insect cells. A Baculovirus alkaline nuclease knock out construct produces fragmented DNA and aberrant capsids. This figure is based on the data of. These include characterization of the 21 amino acid predicted fusion peptide sequence that is highly homologous to a region of baculovirus envelope fusion proteins.

In this project we will map the structural and functional domains of LEF This allows the manipulation of baculovirus genomes in bacteria and facilitates the investigation of lethal knockouts because the manipulation and growth can be accomplished in bacteria. Characterization of a baculovirus encoded protein that is associated with infected-cell membranes and budded virions.

We have also characterized a baculovirus encoded nuclease and a single strand DNA binding protein that may be involved in homologous recombination. This analysis reveals that genomes can be evolutionarily constrained in different ways depending on the proteins they encode.


Scanning EM by K.

Baculovirus Molecular Biology – NCBI Bookshelf

Furthermore, immunoelectron microscopy of cells transfected with the knockout bacmids revealed defects in nucleocapsid production for all three constructs. The progeny generation is biphasic, with two different phenotypes during virus infection: The data that we have generated is critical for understanding how the virus is able to function as an expression vector and also for assessing its safety if it is to be used as an insecticide.

The histogram shows the amount of different reported genes in each baculovirus genus or recognized lineage bars in pink colorand the subset of shared genes for all members of the corresponding phylogenetic clade bars in green color. The unwinding and renaturation activities of DBP, as well as the DNA binding activity, were sensitive to sulfhydryl reagents and were inhibited by oxidation of thiol groups with diamide or by alkylation with N-ethylmaleimide.

We made major progress in both the biochemical and biological characterization of gene products involved in DNA replication and processing including a gene with homology to lambda integrase called very late factor 1 VLF-1 and another with homology to exonucleases from lambda phage and herpes viruses.

Characterization of a baculovirus with a deletion of vlf The studies on the envelope fusion protein provides information on how retroviruses likely evolved from non-infectious transposable elements to infectious viruses.

We will continue these investigations as follows: In this project we will biochemically characterize the properties of DBP. Conservation of a proteinase cleavage site between an insect retrovirus gypsy env protein and a baculovirus envelope fusion protein. To investigate the role of the gene products encoded from the open reading frames, and of Autographa californica multiple nucleopolyhedrovirus AcMNPVa set of bacmid knockout and repair constructs were generated.

Rohrmann These figures are freely available for non commercial use: