alexa Phenotypic grouping of 141 BmNPVs lacking viral gene sequences.
General Science

General Science

Journal of Biotechnology & Biomaterials

Author(s): Ono C, Kamagata T, Taka H, Sahara K, Asano S,

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Abstract We constructed a series of gene knockout BmNPVs (KOVs) for each of 141 genes (Gomi et al., 1999; Katsuma et al., 2011) using the BmNPV T3 bacmid system (Ono et al., 2007) and lambda red recombination system (Datsenko and Wanner, 2000). In a subsequent analysis of the properties needed for infection using a marker gene, egfp (enhanced green fluorescent protein gene), inserted into the polyhedrin locus, the knockout viruses (KOVs) were subdivided into four phenotypic types, A to D. Type-A (86 KOVs) showed the ability to expand infections equivalent to the control while type-B (8 KOVs) spread infections more slowly. Type-C (37 KOVs) expressed egfp in transfected-BmN cells but the production of infectious viruses was not observed. Type-D (10 KOVs) showed no ability to express egfp even in the transfection experiments. KOVs lacking genes (pkip (Bm15), gp41 (Bm66), bro-d (Bm131), Bm20, 48, 65, 91, 93, or 101) previously identified as being essential, were placed in the viable type-A and B categories. Copyright © 2012 Elsevier B.V. All rights reserved. This article was published in Virus Res and referenced in Journal of Biotechnology & Biomaterials

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