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Genome sequence of Erinnyis ello granulovirus (ErelGV), a natural cassava hornworm pesticide and the first sequenced sphingid-infecting betabaculovirus
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Genome sequence of Erinnyis ello granulovirus (ErelGV), a natural cassava hornworm pesticide and the first sequenced sphingid-infecting betabaculovirus
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Genome sequence of Erinnyis ello granulovirus (ErelGV), a natural cassava hornworm pesticide and the first sequenced sphingid-infecting betabaculovirus
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Journal Article
Genome sequence of Erinnyis ello granulovirus (ErelGV), a natural cassava hornworm pesticide and the first sequenced sphingid-infecting betabaculovirus
2014
Overview
Background
Cassava (
Manihot esculenta
) is the basic source for dietary energy of 500 million people in the world. In Brazil,
Erinnyis ello ello
(Lepidoptera: Sphingidae) is a major pest of cassava crops and a bottleneck for its production. In the 1980s, a naturally occurring baculovirus was isolated from
E. ello
larva and successfully applied as a bio-pesticide in the field. Here, we described the structure, the complete genome sequence, and the phylogenetic relationships of the first sphingid-infecting betabaculovirus.
Results
The baculovirus isolated from the cassava hornworm cadavers is a betabaculovirus designated
Erinnyis ello granulovirus
(ErelGV). The 102,759 bp long genome has a G + C content of 38.7%. We found 130 putative ORFs coding for polypeptides of at least 50 amino acid residues. Only eight genes were found to be unique. ErelGV is closely related to ChocGV and PiraGV isolates. We did not find typical homologous regions and
cathepsin
and
chitinase
homologous genes are lacked. The presence of
he65
and
p43
homologous genes suggests horizontal gene transfer from
Alphabaculovirus
. Moreover, we found a nucleotide metabolism-related gene and two genes that could be acquired probably from
Densovirus
.
Conclusions
The ErelGV represents a new virus species from the genus
Betabaculovirus
and is the closest relative of ChocGV. It contains a
dUTPase
-like, a
he65
-like,
p43
-like genes, which are also found in several other alpha- and betabaculovirus genomes, and two
Densovirus
-related genes. Importantly, recombination events between insect viruses from unrelated families and genera might drive baculovirus genomic evolution.
Publisher
BioMed Central,Springer Nature B.V
Subject
/ Animal Genetics and Genomics
/ Animals
/ Biomedical and Life Sciences
/ Cassava
/ DNA
/ Enzymes
/ Eukaryote microbial genomics
/ Genes
/ Genomes
/ Genomics
/ Granulovirus - classification
/ Granulovirus - isolation & purification
/ Lepidoptera - growth & development
/ Microbial Genetics and Genomics
/ Open Reading Frames - genetics
/ Viral Proteins - classification
/ Viruses
