title: [Expression of the gene for hybrid beta-lactamase pBR322 with C-terminal fragment containing tuftsin (Thr-Lys-Pro-Arg)].
abstract: A hybrid beta-lactamase gene with a synthetic tuftsin-coding DNA fragment inserted at the Pst I-site of pBR322 plasmid has been obtained and its expression has been studied. Radioactive amino acids have been used to show that in E. coli chi 925 minicells up to 30% of newly synthesized chimeric protein is secreted into periplasm providing the tuftsin transport. After hybrid protein cleavage with CNBr, tuftsin has been isolated using ion-exchange and thin-layer chromatography.
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D004262:DNA Restriction Enzymes; D004274:DNA, Recombinant; D004926:Escherichia coli / Q000201:enzymology / Q000235:genetics; D005786:Gene Expression Regulation; D009693:Nucleic Acid Hybridization; D010957:Plasmids; D011994:Recombinant Proteins / Q000096:biosynthesis; D014405:Tuftsin / Q000032:analysis / Q000235:genetics*; D001618:beta-Lactamases / Q000032:analysis / Q000235:genetics*
chemical_list: D004274:DNA, Recombinant; D011994:Recombinant Proteins; D004262:DNA Restriction Enzymes; D001618:beta-Lactamases; D014405:Tuftsin
vernacular_title: Izuchenie ékspressii gena gibridnoĭ beta-laktamazy pBR322 s C-kontsevym fragmentom, soderzhashchim taftsin (Thr-Lys-Pro-Arg).