Giuliodori, AM, Di Pietro, F, Marzi, S, Masquida, B, Wagner, R, Romby, P, Gualerzi, CO and Pon, CL (2010) The cspA mRNA is a thermosensor that modulates translation of the cold-shock protein CspA. Mol. Cell 37:21-33
Cold induction of cspA, the paradigm Escherichia coli cold-shock gene, is mainly subject to posttranscriptional control, partly promoted by cis-acting elements of its transcript, whose secondary structure at 37 degrees C and at cold-shock temperature has been elucidated here by enzymatic and chemical probing. The structures, which were also validated by mutagenesis, demonstrate that cspA mRNA undergoes a temperature-dependent structural rearrangement, likely resulting from stabilization in the cold of an otherwise thermodynamically unstable folding intermediate. At low temperature, the "cold-shock" structure is more efficiently translated and somewhat less susceptible to degradation than the 37 degrees C structure. Overall, our data shed light on a molecular mechanism at the basis of the cold-shock response, indicating that cspA mRNA is able to sense temperature downshifts, adopting functionally distinct structures at different temperatures, even without the aid of trans-acting factors. Unlike with other previously studied RNA thermometers, these structural rearrangements do not result from melting of hairpin structures.
5' Untranslated Regions; Acclimatization; Cold Temperature; Escherichia coli/genetics; Escherichia coli/metabolism; Escherichia coli Proteins/genetics; Escherichia coli Proteins/physiology; Gene Expression Regulation, Bacterial; Heat-Shock Proteins/genetics; Heat-Shock Proteins/physiology; Models, Genetic; Nucleic Acid Conformation; Protein Biosynthesis; RNA, Messenger/chemistry; RNA, Messenger/physiology
You can help EcoliWiki by summarizing why this paper is useful
Useful Materials and Methods
You can help Ecoliwiki by describing the useful materials (strains, plasmids, antibodies, etc) described in this paper.
|Gene product||Qualifier||GO ID||GO term name||Evidence Code||with/from||Aspect||Notes||Status|
Add links to pages that link here (e.g. gene, product, method pages)
See Help:References for how to manage references in EcoliWiki.