Tryptoline-based benzothiazoles re-sensitize MRSA to β-lactam antibiotics
摘要:
Resistance-modifying agents (RMAs) offer a promising solution to combat bacterial antibiotic resistance. Here we report the discovery and structure-activity relationships of a new class of RMAs with a novel tryptoline-based benzothiazole scaffold. Our most potent compound in this series (4ad) re-sensitizes multiple MRSA strains to cephalosporins at low concentrations (2 mu g/mL) and has low mammalian cytotoxicity with a half growth inhibitory concentration (GI(50)) > 100 mu g/mL in human cervical carcinoma (HeLa) cells. In addition, the same core scaffold with different substitutions also gives good antibacterial activity against MRSA.
Improving the Stability and Catalyst Lifetime of the Halogenase RebH By Directed Evolution
作者:Catherine B. Poor、Mary C. Andorfer、Jared C. Lewis
DOI:10.1002/cbic.201300780
日期:2014.6.16
Evolving halos: We have used directed evolution to engineer an RebHhalogenase variant with a Topt more than 5 °C higher than that of wild‐type RebH, and a second variant with a Tm 18 °C higher. These enzymes provided significantly improved conversion for halogenation of tryptophan and several non‐natural substrates.
The present invention can provide a cancer treatment drug containing, as an active ingredient, a substance selected from the group consisting of an indazole compound of the following formula (I), a pharmaceutically acceptable salt, a hydrate, a water adduct and a solvate:
[EN] FUSED TRICYCLIC DERIVATIVE, PREPARATION METHOD THEREFOR, AND PHARMACEUTICAL APPLICATION THEREOF<br/>[FR] DÉRIVÉ TRICYCLIQUE CONDENSÉ, SON PROCÉDÉ DE PRÉPARATION ET SON APPLICATION PHARMACEUTIQUE<br/>[ZH] 并三环类衍生物、其制备方法及其在医药上的应用
Tryptoline-based benzothiazoles re-sensitize MRSA to β-lactam antibiotics
作者:Xinfeng Wang、Jinsen Chen、Wei Wang、Anna Jaunarajs、Xiang Wang
DOI:10.1016/j.bmc.2019.115095
日期:2019.11
Resistance-modifying agents (RMAs) offer a promising solution to combat bacterial antibiotic resistance. Here we report the discovery and structure-activity relationships of a new class of RMAs with a novel tryptoline-based benzothiazole scaffold. Our most potent compound in this series (4ad) re-sensitizes multiple MRSA strains to cephalosporins at low concentrations (2 mu g/mL) and has low mammalian cytotoxicity with a half growth inhibitory concentration (GI(50)) > 100 mu g/mL in human cervical carcinoma (HeLa) cells. In addition, the same core scaffold with different substitutions also gives good antibacterial activity against MRSA.