title: Metabolic switches and adaptations deduced from the proteomes of Streptomyces coelicolor wild type and phoP mutant grown in batch culture.
abstract: Bacteria in the genus Streptomyces are soil-dwelling oligotrophs and important producers of secondary metabolites. Previously, we showed that global messenger RNA expression was subject to a series of metabolic and regulatory switches during the lifetime of a fermentor batch culture of Streptomyces coelicolor M145. Here we analyze the proteome from eight time points from the same fermentor culture and, because phosphate availability is an important regulator of secondary metabolite production, compare this to the proteome of a similar time course from an S. coelicolor mutant, INB201 (ΔphoP), defective in the control of phosphate utilization. The proteomes provide a detailed view of enzymes involved in central carbon and nitrogen metabolism. Trends in protein expression over the time courses were deduced from a protein abundance index, which also revealed the importance of stress pathway proteins in both cultures. As expected, the ΔphoP mutant was deficient in expression of PhoP-dependent genes, and several putatively compensatory metabolic and regulatory pathways for phosphate scavenging were detected. Notably there is a succession of switches that coordinately induce the production of enzymes for five different secondary metabolite biosynthesis pathways over the course of the batch cultures.
authors.affiliation: Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom.
authors.forename: Louise
authors.initials: L
authors.lastname: Thomas
authors.forename: David A
authors.initials: DA
authors.lastname: Hodgson
authors.forename: Alexander
authors.initials: A
authors.lastname: Wentzel
authors.forename: Kay
authors.initials: K
authors.lastname: Nieselt
authors.forename: Trond E
authors.initials: TE
authors.lastname: Ellingsen
authors.forename: Jonathan
authors.initials: J
authors.lastname: Moore
authors.forename: Edward R
authors.initials: ER
authors.lastname: Morrissey
authors.forename: Roxane
authors.initials: R
authors.lastname: Legaie
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Wohlleben
authors.forename: Antonio
authors.initials: A
authors.lastname: Rodríguez-García
authors.forename: Juan F
authors.initials: JF
authors.lastname: Martín
authors.forename: Nigel J
authors.initials: NJ
authors.lastname: Burroughs
authors.forename: Elizabeth M H
authors.initials: EM
authors.lastname: Wellington
authors.forename: Margaret C M
authors.initials: MC
authors.lastname: Smith
mesh_terms: D000064:Acclimatization; D001426:Bacterial Proteins / Q000235:genetics* / Q000378:metabolism*; D061249:Batch Cell Culture Techniques; D015415:Biomarkers / Q000378:metabolism; D002478:Cells, Cultured; D002853:Chromatography, Liquid; D020869:Gene Expression Profiling; D015964:Gene Expression Regulation, Bacterial; D009154:Mutation / Q000235:genetics*; D020411:Oligonucleotide Array Sequence Analysis; D010710:Phosphates / Q000378:metabolism*; D020543:Proteome / Q000032:analysis; D040901:Proteomics; D012329:RNA, Bacterial / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D048372:Streptomyces coelicolor / Q000254:growth & development / Q000378:metabolism*
chemical_list: D001426:Bacterial Proteins; D015415:Biomarkers; D010710:Phosphates; D020543:Proteome; D012329:RNA, Bacterial; D012333:RNA, Messenger; C061064:PhoP protein, Bacteria