Betabaculovirus

Betabaculovirus is a genus of viruses, in the family Baculoviridae. Arthropods serve as natural hosts. There are 26 species in this genus.[1][2][3]

Betabaculovirus
Electron micrograph of Phthorimaea operculella granulovirus occlusion bodies
Virus classification
(unranked): Virus
Realm: incertae sedis
Kingdom: incertae sedis
Phylum: incertae sedis
Class: Naldaviricetes
Order: Lefavirales
Family: Baculoviridae
Genus: Betabaculovirus

Taxonomy

The following species are assigned to the genus:[3]

  • Adoxophyes orana granulovirus
  • Agrotis segetum granulovirus
  • Artogeia rapae granulovirus
  • Choristoneura fumiferana granulovirus
  • Clostera anachoreta granulovirus
  • Clostera anastomosis granulovirus A
  • Clostera anastomosis granulovirus B
  • Cnaphalocrocis medinalis granulovirus
  • Cryptophlebia leucotreta granulovirus
  • Cydia pomonella granulovirus
  • Diatraea saccharalis granulovirus
  • Epinotia aporema granulovirus
  • Erinnyis ello granulovirus
  • Harrisina brillians granulovirus
  • Helicoverpa armigera granulovirus
  • Lacanobia oleracea granulovirus
  • Mocis latipes granulovirus
  • Mythimna unipuncta granulovirus A
  • Mythimna unipuncta granulovirus B
  • Phthorimaea operculella granulovirus
  • Plodia interpunctella granulovirus
  • Plutella xylostella granulovirus
  • Spodoptera frugiperda granulovirus
  • Spodoptera litura granulovirus
  • Trichoplusia ni granulovirus
  • Xestia c-nigrum granulovirus

Structure

Viruses in Betabaculovirus are enveloped. Genomes are circular, around 80-180kb in length. The genome codes for 100 to 180 proteins.[2]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
BetabaculovirusBudded or OccludedEnvelopedCircularMonopartite

Life cycle

Viral replication is nuclear. Entry into the host cell is achieved by attachment of the viral glycoproteins to host receptors, which mediates endocytosis. Replication follows the dsDNA bidirectional replication model. Dna templated transcription, with some alternative splicing mechanism is the method of transcription. The virus exits the host cell by nuclear pore export, and existing in occlusion bodies after cell death and remaining infectious until finding another host. Arthropods serve as the natural host. Transmission routes are fecal-oral.[2]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
BetabaculovirusArthropodsMidgut then hemocoel; digestive gland epithelium (shrimps)Cell receptor endocytosisBudding; OcclusionNucleusNucleusOral-fecal

References
  1. Harrison, RL; Herniou, EA; Jehle, JA; Theilmann, DA; Burand, JP; Becnel, JJ; Krell, PJ; van Oers, MM; Mowery, JD; Bauchan, GR; Ictv Report, Consortium (September 2018). "ICTV Virus Taxonomy Profile: Baculoviridae". The Journal of General Virology. 99 (9): 1185–1186. doi:10.1099/jgv.0.001107. PMID 29947603.
  2. "Viral Zone". ExPASy. Retrieved 15 June 2015.
  3. "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021. Retrieved 12 May 2021.
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