Autographa californica multiple nucleopolyhedrovirus ac142, a core gene that is essential for BV production and ODV envelopment.

Abstract:

:Autographa californica multiple nucleopolyhedrovirus (AcMNPV) ac142 is a baculovirus core gene and encodes a protein previously shown to associate with occlusion-derived virus (ODV). To determine its role in the baculovirus life cycle, we used the AcMNPV bacmid system to generate an ac142 deletion virus (AcBAC(ac142KO-PH-GFP)). Fluorescence and light microscopy revealed that AcBAC(ac142KO-PH-GFP) exhibits a single-cell infection phenotype. Titration assays and Western blot confirmed that AcBAC(ac142KO-PH-GFP) is unable to produce budded virus (BV). However, viral DNA replication is unaffected and the development of occlusion bodies in AcBAC(ac142KO-PH-GFP)-transfected cells evidenced progression to very late phases of the viral infection. Western blot analysis showed that AC142 is expressed in the cytoplasm and nucleus throughout infection and that it is a structural component of BV and ODV which localizes to nucleocapsids. Electron microscopy indicates that ac142 is required for nucleocapsid envelopment to form ODV and their subsequent occlusion, a fundamental process to all baculoviruses.

journal_name

Virology

journal_title

Virology

authors

McCarthy CB,Dai X,Donly C,Theilmann DA

doi

10.1016/j.virol.2007.10.019

subject

Has Abstract

pub_date

2008-03-15 00:00:00

pages

325-39

issue

2

eissn

0042-6822

issn

1096-0341

pii

S0042-6822(07)00696-4

journal_volume

372

pub_type

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