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  • 标题:Conditional expression of the vesicular stomatitis virus glycoprotein gene in Escherichia coli
  • 本地全文:下载
  • 作者:J K Rose ; A Shafferman
  • 期刊名称:Proceedings of the National Academy of Sciences
  • 印刷版ISSN:0027-8424
  • 电子版ISSN:1091-6490
  • 出版年度:1981
  • 卷号:78
  • 期号:11
  • 页码:6670-6674
  • DOI:10.1073/pnas.78.11.6670
  • 语种:English
  • 出版社:The National Academy of Sciences of the United States of America
  • 摘要:Bacterial plasmids that directed expression of the vesicular stomatitis virus glycoprotein (G-protein) gene under control of the tryptophan operon regulatory region were constructed. A plasmid directing the synthesis of a G-protein-like protein (containing the NH2-terminal segment of seven amino acids encoded by the trpE gene fused to the complete G-protein sequence lacking only its NH2-terminal methionine) could be transformed into trpR+ (repressed) but not into trpR- (derepressed) cells. This result suggested initially that derepressed synthesis of the G-protein-like protein encoded by this plasmid was lethal in Escherichia coli. Deletion of the sequence encoding the large hydrophobic segment near the COOH terminus of G-protein did not overcome this lethality. Lethality of derepressed synthesis was overcome by deletion of the G-protein gene region encoding 10 amino acids in the hydrophobic NH2-terminal domain (signal peptide). Tryptic peptide mapping demonstrated that the G-protein-like protein and some truncated proteins encoded by the plasmid contained G-protein protein sequences. Antisera to vesicular stomatitis virus precipitated the G-protein-like protein, showing that it shares antigenic determinants with the authentic G-protein protein.
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