Linked Life Data

2230725

Source:http://linkedlifedata.com/resource/pubmed/id/2230725

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
1990-12-4
pubmed:abstractText
An improved polyhedrin-based baculovirus expression vector was constructed to expedite distinguishing infections by putative baculovirus recombinants from infections by wild-type (wt) baculovirus. The vector utilizes the Escherichia coli beta-galactosidase gene (lacZ) as a genetic marker for positive recombination between wt Autographa californica nuclear polyhedrosis virus and the baculovirus transfer vector. The marker gene/expression cassette was constructed so that lacZ and the deleted polyhedrin gene were transcribed in opposite orientations, both terminating in a simian virus 40 DNA fragment which acts as a bidirectional terminator. In the constructed vector, lacZ is transcribed from the Drosophila melanogaster heat-shock promoter (hsp 70), which is constitutively expressed in baculovirus-infected Spodoptera frugiperda (Sf) cells, thereby making the site of the deleted polyhedrin gene available for the insertion and expression of foreign genes under the control of the polyhedrin promoter. Recombinant baculoviruses are readily selected in plaque assays by the development of a blue colour upon the addition of X-Gal. The colour selection renders the retrieval of recombinants less dependent on a high frequency of recombination between the transfer vector and wt baculovirus DNA. The usefulness of this new vector was illustrated by expressing gene I of cauliflower mosaic virus, which encodes a protein of Mr 46,000. Expression of gene I was at the same level as in cells infected with a conventional polyhedrin-based expression vector. Gene I protein formed large hollow fibre-like structures in the cytoplasm of infected Sf cells. This is the first plant virus protein to be expressed in insect cells by a recombinant baculovirus.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0022-1317
pubmed:author
pubmed:issnType
Print
pubmed:volume
71 ( Pt 10)
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2201-9
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
Expression of cauliflower mosaic virus gene I in insect cells using a novel polyhedrin-based baculovirus expression vector.
pubmed:affiliation
Department of Virology, Agricultural University, Wageningen, The Netherlands.
pubmed:publicationType
Journal Article, In Vitro, Research Support, Non-U.S. Gov't