期刊
VIROLOGY
卷 379, 期 1, 页码 87-96出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.virol.2008.06.015
关键词
baculovirus; p48; gene deletion; nucleocapsid envelopment
类别
资金
- Wageningen University and Research Center, the Netherlands [pUC19egfp]
- National Basic Research Program of China [2003CB114202, 2006CB102005]
- National Nature Science Foundation of China [30530540]
Autographa califomica multiple nucleopolyhedrovirus (AcMNPV) p48 (ac103) is a highly conserved baculovirus gene of unknown function. In the present study, we generated a knockout of the p48 gene in an AcMNPV bacmid and investigated the role of P48 in baculovirus life cycle. The p48-null Bacmid vAC(P48-KO-PH-GFP) was unable to propagate in cell culture, while a 'repair' Bacmid vAC(P411-REP-PH-GF) was able to replicate in a manner similar to a wild-type Bacmid vAc(PH-GFP). Titration assays and Western blotting confirmed that vACP48-KO-PH-GFP was unable to produce budded viruses (BVs). qPCR analysis showed that p48 deletion did not affect viral DNA replication. Electron microscopy indicated that P48 was required for nucleocapsid envelopment to form occlusion-derived viruses (ODVs) and their Subsequent occlusion. Confocal analysis showed that P48 prominently condensed in the centre of the nucleus. Our results demonstrate that P48 plays an essential role in BV production and ODV envelopment in the AcMNPV life cycle. (C) 2008 Elsevier Inc. All rights reserved.
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