Gram-negative bacteria often use N-acyl-homoserine lactones (AHLs) as signal molecules to monitor their local population densities and to regulate gene-expression in a process called âQuorum Sensingâ (QS). This cell-to-cell communication allows bacteria to adapt to environmental changes and to behave as multicellular communities. QS plays a key role in both bacterial virulence towards the host and symbiotic interactions with other organisms. Plants also perceive AHLs and respond to them with changes in gene expression or modifications in development. Herein, we report the synthesis of new AHL-derivatives for the investigation and identification of AHL-interacting proteins. We show that our new compounds are still recognised by different bacteria and that a novel biotin-tagged-AHL derivative interacts with a bacterial AHL receptor.
革兰氏阴性细菌常利用N-酰基高
丝氨酸内酯(AHLs)作为信号分子,监测其局部种群密度,并通过一种称为“群体感应”(Quorum Sensing,简称QS)的过程调控
基因表达。这种细胞间通讯使细菌能适应环境变化,表现为多细胞社群行为。QS在细菌对宿主的毒力以及其他
生物的共生相互作用中发挥关键作用。植物也能感知AHLs,并以
基因表达变化或发育改变来响应它们。在此,我们报道了新型AHL衍
生物的合成,用于调查和鉴定AHL相互作用蛋白。我们展示,我们的新化合物仍被不同细菌识别,且一种新型
生物素标记的AHL衍
生物能与细菌的AHL受体相互作用。