ABSTRACT
The type II fatty acid synthesis (FASII) pathway is essential for bacterial lipid biosynthesis and continues to be a promising target for novel antibacterial compounds. Recently, it has been demonstrated that
Chlamydia
is capable of FASII and this pathway is indispensable for
Chlamydia
growth. Previously, a high-content screen with
Chlamydia trachomatis
-infected cells was performed, and acylated sulfonamides were identified to be potent growth inhibitors of the bacteria.
C. trachomatis
strains resistant to acylated sulfonamides were isolated by serial passage of a wild-type strain in the presence of low compound concentrations. Results from whole-genome sequencing of 10 isolates from two independent drug-resistant populations revealed that mutations that accumulated in
fabF
were predominant. Studies of the interaction between the FabF protein and small molecules showed that acylated sulfonamides directly bind to recombinant FabF
in vitro
and treatment of
C. trachomatis
-infected HeLa cells with the compounds leads to a decrease in the synthesis of
Chlamydia
fatty acids. This work demonstrates the importance of FASII for
Chlamydia
development and may lead to the development of new antimicrobials.
摘要
II 型脂肪酸合成(FASII)途径是细菌脂质生物合成所必需的,并且仍然是新型抗菌化合物的一个很有前景的靶点。最近,研究表明
衣原体
衣原体能够进行 FASII,而这一途径对于
衣原体
生长不可或缺。在此之前,通过高含量筛选
沙眼衣原体
-感染的细胞进行了高含量筛选,发现酰化磺胺类药物是该细菌的强效生长抑制剂。
沙眼衣原体
通过在低浓度化合物存在下连续培养野生型菌株,分离出了对酰化磺胺类药物耐药的沙眼衣原体菌株。对来自两个独立耐药菌群的 10 株分离株进行全基因组测序的结果显示,在
fabF
中积累的突变占主导地位。对 FabF 蛋白和小分子之间相互作用的研究表明,酰化磺胺类药物在体外直接与重组 FabF
在体外
治疗
沙眼衣原体
-感染的 HeLa 细胞会导致沙眼衣原体的合成减少。
衣原体
脂肪酸的合成。这项工作证明了 FASII 对于
衣原体
发展的重要性,并有可能开发出新的抗菌药物。