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Screening and optimization of an efficient Bombyx mori nucleopolyhedrovirus inducible promoter

Paper ID Volume ID Publish Year Pages File Format Full-Text
22659 43369 2016 9 PDF Available
Title
Screening and optimization of an efficient Bombyx mori nucleopolyhedrovirus inducible promoter
Abstract

•Screening of several BmNPV-inducible promoters that identified highest virus-induced activity with the 39k promoter.•Identification of two regulatory regions of 39k promoter that are involved in the BmNPV-induced activity.•Constructed HP39K promoter could be induced by BmNPV infection to mediate efficient RNAi expression.

Pathogen-inducible promoters have been studied extensively and widely used in resistance breeding and gene therapy. However, few reports have been published that explore the efficacy of Bombyx mori nucleopolyhedrovirus (BmNPV)-inducible promoters in antiviral research in the Bombyx mori (Lepidoptera). Here, we screened BmNPV promoters (VP1054, P33, Bm21, Bm122, 39K, P143, and P6.9) and found that the 39K promoter had the highest BmNPV-induced transcriptional activity by dual-luciferase reporter assays system. By 5′ truncation analysis, two regions of 39K promoter were critical for optimal virus-inducible activity, indicated that they could serve as a candidate to produce synthetic pathogen-induced promoters. Furthermore, we enhanced the virus-inducible activity of BmNPV 39K promoter using a hybrid enhancer comprising hr3 and polh-up (designated as HP39K). Finally, we showed that RNAi regulated by HP39K promoter could significantly inhibit the proliferation of BmNPV in silkworm cells. Taken together, our results have practical value in antiviral research of silkworm and baculovirus expression system.

Keywords
Silkworm; BmNPV; Baculovirus promoters; 39K promoter; Virus-inducible promoter; Antiviral
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Screening and optimization of an efficient Bombyx mori nucleopolyhedrovirus inducible promoter
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 231, 10 August 2016, Pages 72–80
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us