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首页> 外文期刊>Journal of bacteriology >Inhibitory Effect of Heterologous Ribosome Recycling Factor on Growth of Escherichia coli
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Inhibitory Effect of Heterologous Ribosome Recycling Factor on Growth of Escherichia coli

机译:异源核糖体回收因子对大肠杆菌生长的抑制作用

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摘要

Ribosome recycling factor (RRF) of Thermotoga maritimawas expressed in Escherichia coli from the cloned T. maritima RRF gene and purified. Expression of T. maritima RRF inhibited growth of the E. coli host in a dose-dependent manner, an effect counteracted by the overexpression of E. coli RRF. T. maritima RRF also inhibited the E. coli RRF reaction in vitro. Genes encoding RRFs fromStreptococcus pneumoniae and Helicobacter pylori have been cloned, and they also impair growth of E. coli, although the inhibitory effect of these RRFs was less pronounced than that of T. maritima RRF. The amino acid sequence at positions 57 to 62, 74 to 78, 118 to 122, 154 to 160, and 172 to 176 in T. maritima RRF differed totally from that ofE. coli RRF. This suggests that these regions are important for the inhibitory effect of heterologous RRF. We further suggest that bending and stretching of the RRF molecule at the hinge between two domains may be critical for RRF activity and therefore responsible forT. maritima RRF inhibition of the E. coli RRF reaction.
机译:克隆的 T在大肠杆菌中表达了 Thermotoga maritima 的核糖体循环因子(RRF)。 maritima RRF基因并纯化。 T的表达。 maritima RRF抑制 E的生长。大肠杆菌宿主具有剂量依赖性,这种效应可通过 E的过表达来抵消。大肠菌 RRF。 T。 maritima RRF也抑制了 E。大肠杆菌RRF反应。已经克隆了编码肺炎链球菌幽门螺旋杆菌的RRF的基因,它们也削弱了 E的生长。大肠杆菌,尽管这些RRF的抑制作用不如 T。 maritima RRF。在 T中的位置57至62、74至78、118至122、154至160和172至176的氨基酸序列。 maritima RRF与 E完全不同。大肠菌 RRF。这表明这些区域对于异源RRF的抑制作用是重要的。我们进一步建议,RRF分子在两个结构域之间的铰链处的弯曲和伸展可能对RRF活性至关重要,因此对T负责。 maritima RRF抑制 E。大肠杆菌RRF反应。

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