MCB
Home Help [Feedback] [For Subscribers] [Archive] [Search] [Contents]
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrowReprints and Permissions
Right arrow Copyright Information
Right arrow Books from ASM Press
Right arrow MicrobeWorld
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Spicher, A.
Right arrow Articles by Blau, H. M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Spicher, A.
Right arrow Articles by Blau, H. M.

 Previous Article  |  Next Article 

Molecular and Cellular Biology, December 1998, p. 7371-7382, Vol. 18, No. 12
0270-7306/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Highly Conserved RNA Sequences That Are Sensors of Environmental Stress

Albert Spicher,1 Oivin M. Guicherit,1,dagger Laurent Duret,2 Aaron Aslanian,1 Elvira M. Sanjines,1 Nicholas C. Denko,3 Amato J. Giaccia,3 and Helen M. Blau1,*

Department of Molecular Pharmacology1 and Mayer Cancer Biology Research Laboratory, Department of Radiation Oncology,3 Stanford University School of Medicine, Stanford, California 94305-5332, and Laboratoire de Biométrie, Génétique et Biologie des Populations, UMR CNRS 5558, Université Claude Bernard---Lyon 1, 69622 Villeurbanne Cedex, France2

Received 8 June 1998/Returned for modification 10 August 1998/Accepted 19 August 1998

The putative function of highly conserved regions (HCRs) within 3' untranslated regions (3'UTRs) as regulatory RNA sequences was efficiently and quantitatively assessed by using modular retroviral vectors. This strategy led to the identification of HCRs that alter gene expression in response to oxidative or mitogenic stress. Databases were screened for UTR sequences of >100 nucleotides that had retained 70% identity over more than 300 million years of evolution. The effects of 10 such HCRs on a standard reporter mRNA or protein were studied. To this end, we developed a modular retroviral vector that can allow for a direct comparison of the effects of different HCRs on gene expression independent of their gene-intrinsic 5'UTR, promoter, protein coding region, or poly(A) sequence. Five of the HCRs tested decreased mRNA steady-state levels 2- to 10-fold relative to controls, presumably by altering mRNA stability. One HCR increased translation, and one decreased translation. Elevated mitogen levels caused four HCRs to increase protein levels twofold. One HCR increased protein levels fourfold in response to hypoxia. Although nonconserved UTR sequences may also have a role, these results provide evidence that sequences that are highly conserved during evolution are good candidates for RNA motifs with posttranscriptional regulatory functions in gene expression.

* Corresponding author. Mailing address: Department of Molecular Pharmacology, 300 Pasteur Dr., Stanford University School of Medicine, Stanford, CA 94305-5332. Phone: (650) 723-6209. Fax: (650) 725-2952. E-mail: hblau{at}cmgm.stanford.edu.

dagger Present address: Ontogeny, Inc., Cambridge, MA 02138-1118.

Molecular and Cellular Biology, December 1998, p. 7371-7382, Vol. 18, No. 12
0270-7306/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


This article has been cited by other articles:



Home Help [Feedback] [For Subscribers] [Archive] [Search] [Contents]
J. Bacteriol. J. Virol. Eukaryot. Cell
Microbiol. Mol. Biol. Rev. Clin. Vaccine Immunol. All ASM Journals

Copyright © 1998 by the American Society for Microbiology. All rights reserved.