BrlR from Pseudomonas aeruginosa is a receptor for both cyclic di-GMP and pyocyanin.
BrlR from Pseudomonas aeruginosa is a receptor for both cyclic di-GMP and pyocyanin.
复制标题
来自铜绿假单胞菌的 BrlR 是环二 GMP 和绿脓素的受体
DOI:
10.1038/s41467-018-05004-y
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发表时间:
2018-07-02
影响因子:
16.6
通讯作者:
Gu L
中科院分区:
文献类型:
--
作者:
Wang F;He Q;Yin J;Xu S;Hu W;Gu L
The virulence factor pyocyanin and the intracellular second messenger cyclic diguanylate monophosphate (c-di-GMP) play key roles in regulating biofilm formation and multi-drug efflux pump expression in Pseudomonas aeruginosa. However, the crosstalk between these two signaling pathways remains unclear. Here we show that BrlR (PA4878), previously identified as a c-di-GMP responsive transcriptional regulator, acts also as a receptor for pyocyanin. Crystal structures of free BrlR and c-di-GMP-bound BrlR reveal that the DNA-binding domain of BrlR contains two separate c-di-GMP binding sites, both of which are involved in promoting brlR expression. In addition, we identify a pyocyanin-binding site on the C-terminal multidrug-binding domain based on the structure of the BrlR-C domain in complex with a pyocyanin analog. Biochemical analysis indicates that pyocyanin enhances BrlR-DNA binding and brlR expression in a concentration-dependent manner.
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