Abstract
The transfer–messenger RNA (tmRNA)‐mediated trans‐translation mechanism is highly conserved in bacteria and functions primarily as a system for the rescue of stalled ribosomes and the removal of aberrantly produced proteins. Here, we show that in the antibiotic‐producing soil bacterium Streptomyces coelicolor, trans‐translation has a specialized role in stress management. Analysis of proteins that were carboxy‐terminally His8‐tagged by a recombinant tmRNA identified only 10 targets, including the stress proteins: DnaK heat‐shock protein 70, thiostrepton‐induced protein A, universal stress protein A, elongation factor Tu3, and the cell‐cycle control proteins DasR, SsgA, SsgF and SsgR. Although tmRNA‐tagged proteins are degraded swiftly, the translation of dnaK and dasR messenger RNAs (mRNAs) depends fully on tmRNA, whereas transcription is unaffected. The data unveil a surprisingly dedicated functionality for tmRNA, promoting the translation of the same mRNA it targets, at the expense of sacrificing the first nascent protein. In streptomycetes, tmRNA has evolved into a dedicated task force that ensures the instantaneous response to the exposure to stress.
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Dates
Type | When |
---|---|
Created | 15 years, 8 months ago (Dec. 18, 2009, 6:32 a.m.) |
Deposited | 1 year, 8 months ago (Dec. 18, 2023, 3:58 p.m.) |
Indexed | 1 month, 2 weeks ago (July 19, 2025, 11:54 p.m.) |
Issued | 15 years, 8 months ago (Dec. 18, 2009) |
Published | 15 years, 8 months ago (Dec. 18, 2009) |
Published Online | 15 years, 8 months ago (Dec. 18, 2009) |
Published Print | 15 years, 7 months ago (Feb. 1, 2010) |
@article{Barends_2009, title={Transfer–messenger RNA controls the translation of cell‐cycle and stress proteins in Streptomyces}, volume={11}, ISSN={1469-3178}, url={http://dx.doi.org/10.1038/embor.2009.255}, DOI={10.1038/embor.2009.255}, number={2}, journal={EMBO reports}, publisher={Springer Science and Business Media LLC}, author={Barends, Sharief and Zehl, Martin and Bialek, Sylwia and de Waal, Ellen and Traag, Bjørn A and Willemse, Joost and Jensen, Ole Nørregaard and Vijgenboom, Erik and van Wezel, Gilles P}, year={2009}, month=dec, pages={119–125} }