Linked Life Data

8615020

Source:http://linkedlifedata.com/resource/pubmed/id/8615020

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1996-6-5
pubmed:abstractText
Lysolecithin permeabilization of vaccinia virus-infected cells was employed to prepare extracts that support faithful transcription initiation in vitro on plasmids possessing early, intermediate, and late viral gene promoters. Conditions which optimize transcription from each promoter were defined. The in vitro system was used to investigate the multifunctional viral mRNA capping enzyme, which also functions as the viral early gene transcription termination factor (VTF) and a viral intermediate gene transcription initiation factor. A low level of signal-dependent termination of early gene transcription was observed in vitro which could be elevated by the addition of pure mRNA capping enzyme. VTF-dependent transcription termination was found to be restricted to templates that possessed an early promoter. This restriction mimics that observed in vivo and demonstrates that transcription termination is limited to RNA polymerase molecules that recognize early rather than intermediate or late gene promoters. Extracts prepared from cells infected at the nonpermissive temperature with a virus containing a ts mutation in gene D12L, which encodes the small subunit of VTF, are incapable of supporting both early gene transcription termination and intermediate gene transcription initiation. Both activities are restored upon addition of the purified wild-type mRNA capping enzyme.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0042-6822
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
218
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
169-80
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Use of lysolecithin-permeabilized infected-cell extracts to investigate the in vitro biochemical phenotypes of poxvirus ts mutations altered in viral transcription activity.
pubmed:affiliation
Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, 32610, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.