Acetylenic Replacement of Albicidin's Methacrylamide Residue Circumvents Detrimental
<i>E</i>
/
<i>Z</i>
Photoisomerization and Preserves Antibacterial Activity
作者:Iraj Behroz、Leonardo Kleebauer、Kay Hommernick、Maria Seidel、Stefan Grätz、Andi Mainz、John B. Weston、Roderich D. Süssmuth
DOI:10.1002/chem.202100523
日期:2021.6.21
The natural product albicidin is a highly potent inhibitor of bacterial DNA gyrase. Its outstanding activity, particularly against Gram-negative pathogens, qualifies it as a promising lead structure in the search for new antibacterial drugs. However, as we show here, the N-terminal cinnamoyl moiety of albicidin is susceptible to photochemical E/Z isomerization. Moreover, the newly formed Z isomer exhibits
天然产物 albicidin 是细菌 DNA 旋转酶的高效抑制剂。其出色的活性,特别是针对革兰氏阴性病原体的活性,使其成为寻找新抗菌药物的有前途的先导结构。然而,正如我们在此所示,albicidin 的 N 末端肉桂酰基部分容易发生光化学E / Z异构化。此外,新形成的Z异构体的抗菌活性显着降低,这阻碍了albicidin及其有效衍生物的开发和生物学评价。因此,我们合成了 13 种不同的 albicidin 变体,其中脆弱的对香豆酸部分被取代;这产生了光稳定的类似物。生物活性测定表明,二芳基炔类似物的抗菌功效几乎没有减弱。因此,这种有前途的支架将作为设计有效的基于 Albicidin 的药物的蓝图。