title: Monoclonal antibodies specific for elongation factor Tu and complete nucleotide sequence of the tuf gene in Mycobacterium tuberculosis.
abstract: Monoclonal antibodies against mycobacterial antigens were produced by immunizing LOU/C rats with live Mycobacterium bovis BCG. The antibodies were characterized by an enzyme-linked immunosorbent assay and by sodium dodecyl sulfate-polyacrylamide gel electrophoresis followed by Western blotting (immunoblotting). One antibody, MAMB 2, reactive with a 47-kDa protein was used to screen a lambda gt11 M. tuberculosis gene library (R. A. Young, B. R. Bloom, C. M. Grosskinsky, J. Ivanji, D. Thomas, and R. W. Davis, Proc. Natl. Acad. Sci. USA 82:2583-2587, 1985). Three recombinant phages reactive with MAMB 2 in plaque lysates were isolated, and part of the insert was sequenced. The mycobacterial inserts were all expressed as proteins fused with beta-galactosidase when the phages were induced as lysogens in Escherichia coli. The entire M. tuberculosis tuf gene was obtained by screening the lambda gt11 library with a DNA probe specific for the primary clones. A phage isolated from this screening was able to express the native protein in E. coli when introduced as a lysogen. A comparison of the entire gene sequence and the deduced protein sequence with the EMBL DNA and Swiss-Prot protein data libraries revealed strong homologies with elongation factors of bacteria, yeast mitochondria, and a plant chloroplast.
authors.affiliation: Department for Vaccine Development and Research, National Bacteriological Laboratory, Stockholm, Sweden.
authors.forename: N I
authors.initials: NI
authors.lastname: Carlin
authors.forename: S
authors.initials: S
authors.lastname: Löfdahl
authors.forename: M
authors.initials: M
authors.lastname: Magnusson
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000911:Antibodies, Monoclonal / Q000096:biosynthesis / Q000276:immunology*; D001483:Base Sequence; D005260:Female; D015723:Gene Library; D005798:Genes, Bacterial; D008297:Male; D008969:Molecular Sequence Data; D009169:Mycobacterium tuberculosis / Q000235:genetics*; D009693:Nucleic Acid Hybridization; D010444:Peptide Elongation Factor Tu / Q000032:analysis / Q000235:genetics* / Q000276:immunology; D051381:Rats
chemical_list: D000911:Antibodies, Monoclonal; D010444:Peptide Elongation Factor Tu