PMID:816772

Halegoua, S, Hirashima, A and Inouye, M (1976) Puromycin-resistant biosynthesis of a specific outer-membrane lipoprotein of Escherichia coli.J. Bacteriol. 126:183-91

Abstract

<protect>The reported puromycin resistance of the in vivo biosynthesis of a specific outer-membrane lipoprotein of Escherichia coli was further investigated. The biosynthetic machinery making the lipoprotein was made more accessible to puromycin by disruption of the cell structure using ethylenediaminetetracetate or toluene, and finally in an in vitro protein biosynthesis system using polyribosomes. Puromycin sensitivity of overall protein synthesis increased by about 10-fold for each method of disruption of the cell structure; 50% inhibitions were obtained at 330, 35, 2.7, and 0.22 mug of puromycin per ml for intact cells, ethylenediaminetetraacetate-treated cells, toluene-treated cells, and the polyribosome system, respectively. However, the lipoprotein biosynthesis remained more resistant to puromycin than the biosynthesis of other proteins in all systems tested. These results strongly suggest that puromycin resistance of the lipoprotein biosynthesis is due to an intrinsic property of the lipoprotein biosynthetic machinery.

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