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首页> 外文期刊>Journal of bacteriology >Puromycin-resistant biosynthesis of a specific outer-membrane lipoprotein of Escherichia coli.
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Puromycin-resistant biosynthesis of a specific outer-membrane lipoprotein of Escherichia coli.

机译:大肠杆菌特异膜外脂蛋白的嘌呤霉素抗性生物合成。

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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.
机译:进一步研究了报道的对大肠杆菌特异外膜脂蛋白体内生物合成的嘌呤霉素抗性。通过使用乙二胺四乙酸盐或甲苯破坏细胞结构,最后在使用多核糖体的体外蛋白质生物合成系统中,嘌呤霉素使得制造脂蛋白的生物合成机制更易被嘌呤霉素接近。对于每种破坏细胞结构的方法,嘌呤霉素对整个蛋白质合成的敏感性提高了约10倍;对于完整细胞,乙二胺四乙酸处理过的细胞,甲苯处理过的细胞和多核糖体系统,分别以每毫升330、35、2.7和0.22杯嘌呤霉素获得50%的抑制作用。但是,在所有测试的系统中,脂蛋白的生物合成比其他蛋白的生物合成仍然对嘌呤霉素具有更高的抵抗力。这些结果强烈表明脂蛋白生物合成的嘌呤霉素抗性是由于脂蛋白生物合成机制的固有性质。

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