These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Expression of dihydrofolate reductase, and of the adjacent EIb region, in an Ad5-dihydrofolate reductase recombinant virus.
    Author: Berkner KL, Sharp PA.
    Journal: Nucleic Acids Res; 1984 Feb 24; 12(4):1925-41. PubMed ID: 6199745.
    Abstract:
    A gene with the Ad2 MLP and first leader, and appropriate RNA processing signals (splicing, polyadenylation) positioned around a mouse DHFR cDNA clone was substituted for the EIa region of Ad5, and virus stocks of Ad5 (DHFR-I) were prepared on 293 cells. A DHFR RNA of the expected size and structure was expressed late after infection of 293 cells by Ad5 (DHFR-I), at levels comparable to that of other Ad5 late messages. Although this DHFR mRNA was translated as efficiently as other Ad late mRNAs in vitro, it was only poorly translated in vivo. The substitution of the DHFR gene for the Ad5 EIa region results in aberrant transcriptional activity in the adjacent EIb sequences. The transcriptional levels of the EIb 1kb message were down approximately 10-fold. In addition, a novel pIX-encoding mRNA was produced, generated by the splicing of the Ad first late leader onto sequences 14 bp upstream from the pIX initiation codon. This new mRNA was found to be potently efficient for translation both in vivo and in vitro.
    [Abstract] [Full Text] [Related] [New Search]