The sf32 unique gene of spodoptera frugiperda multiple nucleopolyhedrovirus (SfMNPV) is a non-essential gene that could be involved in nucleocapsid organization in occlusion-derived virions
Fecha
2013Autor
Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión publicada / Argitaratu den bertsioa
Impacto
|
10.1371/journal.pone.0077683
Resumen
A recombinant virus lacking the sf32 gene (Sf32null), unique to the Spodoptera frugiperda multiple nucleopolyhedrovirus
(SfMNPV), was generated by homologous recombination from a bacmid comprising the complete viral genome (Sfbac).
Transcriptional analysis revealed that sf32 is an early gene. Occlusion bodies (OBs) of Sf32null contained 62% more genomic
DNA than viruses containing the sf32 gen ...
[++]
A recombinant virus lacking the sf32 gene (Sf32null), unique to the Spodoptera frugiperda multiple nucleopolyhedrovirus
(SfMNPV), was generated by homologous recombination from a bacmid comprising the complete viral genome (Sfbac).
Transcriptional analysis revealed that sf32 is an early gene. Occlusion bodies (OBs) of Sf32null contained 62% more genomic
DNA than viruses containing the sf32 gene, Sfbac and Sf32null-repair, although Sf32null DNA was three-fold less infective
when injected in vivo. Sf32null OBs were 18% larger in diameter and contained 17% more nucleocapsids within ODVs than
those of Sfbac. No significant differences were detected in OB pathogenicity (50% lethal concentration), speed-of-kill or
budded virus production in vivo. In contrast, the production of OBs/larva was reduced by 39% in insects infected by Sf32null
compared to those infected by Sfbac. The SF32 predicted protein sequence showed homology (25% identity, 44% similarity)
to two adhesion proteins from Streptococcus pyogenes and a single N-mirystoylation site was predicted. We conclude that
SF32 is a non-essential protein that could be involved in nucleocapsid organization during ODV assembly and occlusion,
resulting in increased numbers of nucleocapsids within ODVs. [--]
Materias
Spodoptera frugiperda multiple nucleopolyhedrovirus (SfMNPV),
sf32,
Nucleocapsid organization,
Occlusion-derived virions
Editor
Public Library of Science
Publicado en
Plos One, 8(10): e77683
Departamento
Universidad Pública de Navarra. Departamento de Producción Agraria /
Nafarroako Unibertsitate Publikoa. Nekazaritza Ekoizpena Saila /
Universidad Pública de Navarra/Nafarroako Unibertsitate Publikoa. IdAB. Instituto de Agrobiotecnología / Agrobioteknologiako Institutua
Versión del editor
Entidades Financiadoras
This study received financial support from the Spanish Ministry for Science and Technology (AGL2008-05456-C03-01, AGL2011-30352-C02-01). I.B. received a CSIC studentship.