title: A time resolved metabolomics study: the influence of different carbon sources during growth and starvation of Bacillus subtilis.
abstract: In its natural environment, the soil, the Gram-positive model bacterium Bacillus subtilis frequently encounters nutrient limitation and other stress factors. Efficient adaptation mechanisms are necessary to cope with this wide range of environmental challenges. The ability to utilize diverse carbon sources represents a key adaptation process that allows B. subtilis to thrive in its natural habitat. To gain a comprehensive insight into the metabolism of B. subtilis, global metabolite analyses were performed during growth with glucose alone or glucose with either malate, fumarate or citrate as carbon/energy sources. Furthermore, to achieve a comprehensive coverage of a wide range of chemically different metabolites, complementary GC-MS, LC-MS and (1)H-NMR analyses were applied. This study reveals that the availability of different carbon sources results in different extracellular metabolite profiles whereas a regulated intracellular metabolite equilibrium was observed. In addition, the typical energy-starvation induced activation of the general stress sigma factor σ(B) was only observed upon entry into the stationary phase with glucose or glucose and malate as carbon sources.
authors.affiliation: Institute of Biochemistry, Ernst-Moritz-Arndt-University Greifswald, Felix-Hausdorff-Strasse 4, 17487 Greifswald, Germany. lalk@uni-greifswald.de.
authors.forename: Hanna
authors.initials: H
authors.lastname: Meyer
authors.forename: Hendrikje
authors.initials: H
authors.lastname: Weidmann
authors.forename: Ulrike
authors.initials: U
authors.lastname: Mäder
authors.forename: Michael
authors.initials: M
authors.lastname: Hecker
authors.forename: Uwe
authors.initials: U
authors.lastname: Völker
authors.forename: Michael
authors.initials: M
authors.lastname: Lalk
mesh_terms: D000144:Acids, Acyclic / Q000378:metabolism; D001412:Bacillus subtilis / Q000254:growth & development* / Q000378:metabolism; D001426:Bacterial Proteins / Q000378:metabolism*; D002244:Carbon / Q000378:metabolism*; D015964:Gene Expression Regulation, Bacterial; D005947:Glucose / Q000378:metabolism; D055432:Metabolomics
chemical_list: D000144:Acids, Acyclic; D001426:Bacterial Proteins; D002244:Carbon; D005947:Glucose