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首页> 外文期刊>Annual Review of Phytopathology >Homoserine lactone-mediated gene regulation in plant-associated bacteria.
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Homoserine lactone-mediated gene regulation in plant-associated bacteria.

机译：植物相关细菌中高丝氨酸内酯介导的基因调控。

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摘要

Many plant-associated bacteria produce and utilize diffusible N-acyl-homoserine lactones (AHLs) to regulate the expression of specific bacterial genes and operons. AHL-mediated regulation utilizes 2 genes that encode proteins similar to the LuxI/LuxR system originally studied in the marine symbiont Vibrio fischeri. The LuxI-type proteins are AHL synthases that assemble the diffusible AHL signal. The LuxR-type proteins are AHL-responsive transcriptional regulatory proteins. LuxR proteins control thetranscription of specific bacterial genes in response to the levels of AHL signal. To date, AHL-mediated gene regulation has been identified in a broad range of gram-negative bacteria, most of which are host-associated. However, it seems unlikely that such a widely conserved regulatory mechanism would be limited only to host-microbe interactions. These signals probably play central roles in ecological interactions among organisms in microbial communities by affecting communication among bacterial populations as well as between bacterial populations and their eukaryotic hosts.
机译：许多与植物相关的细菌产生并利用可扩散的N-酰基高丝氨酸内酯（AHL）来调节特定细菌基因和操纵子的表达。 AHL介导的调节利用2个基因编码的蛋白质，这些蛋白质类似于最初在海洋共生费氏弧菌中研究的LuxI / LuxR系统。 LuxI型蛋白质是AHL合成酶，可组装可扩散的AHL信号。 LuxR型蛋白是AHL响应转录调节蛋白。 LuxR蛋白响应AHL信号的水平来控制特定细菌基因的转录。迄今为止，已经在广泛的革兰氏阴性细菌中鉴定了AHL介导的基因调控，其中大多数与宿主相关。但是，如此广泛保存的调节机制似乎不可能仅局限于宿主-微生物相互作用。这些信号可能通过影响细菌种群之间以及细菌种群与其真核宿主之间的交流，在微生物群落中生物之间的生态相互作用中发挥重要作用。

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