title: High level expression of genes cloned in phage lambda gt11.
abstract: Plasmid cloning vectors have been constructed which allow genes originally cloned in lambda gt11 to be expressed at a high level in Escherichia coli. They are based on the pEMBL and pUC vectors, with the genes transcribed from the lac promoter. The EcoRI site in the vector has been altered to be in the same reading frame as the site used for cloning in lambda gt11. Cloned proteins are expressed fused to a 2-kDa leader sequence containing a run of six Aparagine residues which considerably improves the stability of the recombinant proteins, but does not interfere with immunological assays. Using these vectors, the Mycobacterium leprae 18-kDa protein was expressed at 20 mg per litre of culture and constituted 15% of total cell protein.
authors.affiliation: Department of Clinical Sciences, London School of Hygiene and Tropical Medicine, U.K.
authors.forename: N G
authors.initials: NG
authors.lastname: Stoker
authors.forename: K A
authors.initials: KA
authors.lastname: Grant
authors.forename: H M
authors.initials: HM
authors.lastname: Dockrell
authors.forename: C R
authors.initials: CR
authors.lastname: Howard
authors.forename: N F
authors.initials: NF
authors.lastname: Jouy
authors.forename: K P
authors.initials: KP
authors.lastname: McAdam
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000096:biosynthesis / Q000235:genetics; D010582:Bacteriophage lambda / Q000235:genetics*; D001483:Base Sequence; D015153:Blotting, Western; D003001:Cloning, Molecular; D005786:Gene Expression Regulation; D005822:Genetic Vectors; D007158:Immunologic Techniques; D007763:Lac Operon; D008969:Molecular Sequence Data; D009166:Mycobacterium leprae; D010957:Plasmids; D021382:Protein Sorting Signals / Q000235:genetics; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis* / Q000276:immunology; D011994:Recombinant Proteins / Q000096:biosynthesis*; D001616:beta-Galactosidase / Q000276:immunology
chemical_list: D001426:Bacterial Proteins; D021382:Protein Sorting Signals; D011993:Recombinant Fusion Proteins; D011994:Recombinant Proteins; D001616:beta-Galactosidase