title: A family of promoter probe vectors incorporating autofluorescent and chromogenic reporter proteins for studying gene expression in Gram-negative bacteria.
abstract: A series of promoter probe vectors for use in Gram-negative bacteria has been made in two broad-host-range vectors, pOT (pBBR replicon) and pJP2 (incP replicon). Reporter fusions can be made to gfpUV, gfpmut3.1, unstable gfpmut3.1 variants (LAA, LVA, AAV and ASV), gfp+, dsRed2, dsRedT.3, dsRedT.4, mRFP1, gusA or lacZ. The two vector families, pOT and pJP2, are compatible with one another and share the same polylinker for facile interchange of promoter regions. Vectors based on pJP2 have the advantage of being ultra-stable in the environment due to the presence of the parABCDE genes. As a confirmation of their usefulness, the dicarboxylic acid transport system promoter (dctA(p)) was cloned into a pOT (pRU1097)- and a pJP2 (pRU1156)-based vector and shown to be expressed by Rhizobium leguminosarum in infection threads of vetch. This indicates the presence of dicarboxylates at the earliest stages of nodule formation.
authors.affiliation: School of Biological Sciences, University of Reading, Whiteknights, PO Box 228, Reading RG6 6AJ, UK.
authors.forename: R
authors.initials: R
authors.lastname: Karunakaran
authors.affiliation: School of Biological Sciences, University of Reading, Whiteknights, PO Box 228, Reading RG6 6AJ, UK.
authors.forename: T H
authors.initials: TH
authors.lastname: Mauchline
authors.affiliation: School of Biological Sciences, University of Reading, Whiteknights, PO Box 228, Reading RG6 6AJ, UK.
authors.forename: A H F
authors.initials: AHF
authors.lastname: Hosie
authors.affiliation: School of Biological Sciences, University of Reading, Whiteknights, PO Box 228, Reading RG6 6AJ, UK.
authors.forename: P S
authors.initials: PS
authors.lastname: Poole
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism*; D015342:DNA Probes / Q000235:genetics*; D029382:Dicarboxylic Acid Transporters / Q000235:genetics / Q000378:metabolism; D005434:Flow Cytometry; D015870:Gene Expression; D017930:Genes, Reporter; D005822:Genetic Vectors; D006090:Gram-Negative Bacteria / Q000235:genetics / Q000378:metabolism*; D049452:Green Fluorescent Proteins / Q000235:genetics / Q000378:metabolism; D008164:Luminescent Proteins / Q000235:genetics / Q000378:metabolism*; D010957:Plasmids; D011401:Promoter Regions, Genetic / Q000235:genetics*; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D016961:Rhizobium leguminosarum / Q000201:enzymology / Q000235:genetics / Q000472:pathogenicity; D031306:Vicia / Q000382:microbiology
chemical_list: D001426:Bacterial Proteins; D015342:DNA Probes; D029382:Dicarboxylic Acid Transporters; D008164:Luminescent Proteins; D011993:Recombinant Fusion Proteins; D049452:Green Fluorescent Proteins