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PMID: 2643095 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S.

A translational enhancer derived from tobacco mosaic virus is functionally equivalent to a Shine-Dalgarno sequence.

Gallie DR, Kado CI

Abstract

When present at the 5' end of mRNAs, the untranslated leader sequence (omega) of tobacco mosaic virus RNA significantly enhances translation in eukaryotes and prokaryotes. We have tested a deletion derivative of the omega sequence, omega delta 3, for its enhancing ability on gene constructs in which the ribosomal binding site was either present or deleted, in several Gram-negative bacterial species including Escherichia coli, Agrobacterium tumefaciens, Xanthomonas campestris pv. vitians, Erwinia amylovora, and Salmonella typhimurium. In vivo production of chloramphenicol acetyltransferase from a gene construct lacking its native ribosomal binding site was enhanced 40- to 120-fold by the presence of omega delta 3. Similar levels of enhancement (30- to 240-fold) were observed when the gene encoding beta-glucuronidase was tested. With a chloramphenicol acetyltransferase construct containing a ribosomal binding site, enhancement was markedly less, between 1- and 3.8-fold. Omega delta 3 appeared to enhance translation independent of its position upstream of the AUG codon used for initiation.

MeSH Terms
Amino Acid Sequence Bacteria/genetics Base Sequence Chloramphenicol O-Acetyltransferase/genetics Conjugation, Genetic Enhancer Elements, Genetic Escherichia coli/genetics Molecular Sequence Data Plasmids Protein Biosynthesis RNA, Messenger/genetics RNA, Viral/genetics Restriction Mapping Tobacco Mosaic Virus/genetics Transformation, Genetic
Chemicals
RNA, Messenger RNA, Viral Chloramphenicol O-Acetyltransferase
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Gallie D R
Department of Plant Pathology, University of California Davis, 95616.
Kado C I
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28 references, click to expand
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Article Info
Journal
Proceedings of the National Academy of Sciences of the United States of America
Abbr.
Proc Natl Acad Sci U S A
ISSN
0027-8424
Published
1989-01-00
Pages
129-32
Language
English
Region
United States
NLM ID
7505876
PMCID
PMC286417
Subset
IM
Grants
NCI NIH HHS · CA11526 · United States
Databases
GENBANK
M23043
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