title: RNase P cleaves the adenine riboswitch and stabilizes pbuE mRNA in Bacillus subtilis.
abstract: RNase P from Bacillus subtilis cleaves in vitro the adenine riboswitch upstream of pbuE, which codes for an adenine efflux pump. The guanine riboswitch, encoded upstream of xpt-pbuX operon, is not cleaved. The cleavage sites do not occur at any predicted structures that should be recognized by RNase P in the theoretical model of the adenine riboswitch. However, it is possible to draw alternative secondary structure models that match the apparent requirements for RNase P substrates at these cleavage sites. Support for these models is provided by appropriate mutagenesis experiments. Adenine showed no effect on the cleavage in vitro of the pbuE adenine riboswitch by RNase P holoenzyme from B. subtilis. The results of genetic experiments performed in B. subtilis support the cleavage of adenine riboswitch by RNase P in vivo and suggest that it induces the stabilization of pbuE mRNA under normal conditions.
authors.affiliation: Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, Connecticut 06520, USA.
authors.forename: Elias
authors.initials: E
authors.lastname: Seif
authors.forename: Sidney
authors.initials: S
authors.lastname: Altman
mesh_terms: D020121:5' Untranslated Regions / Q000378:metabolism; D000225:Adenine / Q000378:metabolism*; D001412:Bacillus subtilis / Q000201:enzymology* / Q000235:genetics*; D001426:Bacterial Proteins / Q000235:genetics*; D001483:Base Sequence; D015964:Gene Expression Regulation, Bacterial; D008969:Molecular Sequence Data; D009690:Nucleic Acid Conformation; D020871:RNA Stability; D012333:RNA, Messenger / Q000378:metabolism*; D043262:Ribonuclease P / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*
chemical_list: D020121:5' Untranslated Regions; D001426:Bacterial Proteins; D012333:RNA, Messenger; D043262:Ribonuclease P; D000225:Adenine