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Nucleic Acids Research 2005 33(4):e42; doi:10.1093/nar/gni042
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Published online 24 February 2005

© The Author 2005. Published by Oxford University Press. All rights reserved
The online version of this article has been published under an open access model. Users are entitled to use, reproduce, disseminate, or display the open access version of this article for non-commercial purposes provided that: the original authorship is properly and fully attributed; the Journal and Oxford University Press are attributed as the original place of publication with the correct citation details given; if an article is subsequently reproduced or disseminated not in its entirety but only in part or as a derivative work this must be clearly indicated. For commercial re-use, please contact journals.permissions{at}oupjournals.org

Methods Online

A multipurpose vector system for the screening of libraries in bacteria, insect and mammalian cells and expression in vivo

Olli H. Laitinen1, Kari J. Airenne1, Vesa P. Hytönen3, Erik Peltomaa1, Anssi J. Mähönen1, Thomas Wirth1, Miia M. Lind1, Kari A. Mäkelä1, Pyry I. Toivanen1, Diana Schenkwein1, Tommi Heikura1, Henri R. Nordlund3, Markku S. Kulomaa3 and Seppo Ylä-Herttuala1,2,*

1 Department of Molecular Medicine and Biotechnology, A.I. Virtanen Institute, University of Kuopio PO Box 1627 FIN-70211, Kuopio, Finland 2 Department of Medicine and Gene Therapy Unit, University of Kuopio PO Box 1627 FIN-70211, Kuopio, Finland 3 Department of Biological and Environmental Science, NanoScience Center University of Jyväskylä Jyväskylä, Finland

*To whom correspondence should be addressed. Tel: +358 17 162075; Fax: +358 17 163751; Email: Seppo.Ylaherttuala{at}uku.fi

Received December 22, 2004. Revised February 8, 2005. Accepted February 8, 2005.

We have constructed a novel tetra-promoter vector (pBVboostFG) system that enables screening of gene/cDNA libraries for functional genomic studies. The vector enables an all-in-one strategy for gene expression in mammalian, bacterial and insect cells and is also suitable for direct use in vivo. Virus preparation is based on an improved mini Tn7 transpositional system allowing easy and fast production of recombinant baculoviruses with high diversity and negligible background. Cloning of the desired DNA fragments or libraries is based on the recombination system of bacteriophage lambda. As an example of the utility of the vector, genes or cDNAs of 18 different proteins were cloned into pBVboostFG and expressed in different hosts. As a proof-of-principle of using the vector for library screening, a chromophoric Thr65-Tyr-Gly67-stretch of enhanced green fluorescent protein was destroyed and subsequently restored by novel PCR strategy and library screening. The pBVboostFG enables screening of genome-wide libraries, thus making it an efficient new platform technology for functional genomics.


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