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基菌素作为一种与病原体相关的, siderophore-modifying C-glycosyltransferase 的强有力的抑制剂
Hening Lin1, Michael A Fischbach, Gregory J Gatto
1Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115, USA.
Journal of the American Chemical Society
|July 20, 2006
概括
研究人员确定了细菌酶IroB的强有力的抑制剂,该酶对病原体的生存至关重要. 这些抑制剂是改性肠杆菌素类似物,可能会导致新的抗生素,这些抗生素针对的是逃避宿主免疫力的致病细菌.
科学领域:
- 微生物学 微生物学
- 生物化学 生物化学
- 药物发现 药物发现 药物发现
背景情况:
- 病原性细菌利用 siderophore enterobactin 来获得铁.
- 酶IroB通过C-葡萄糖化修改了肠杆菌素,逃避了由利波卡林2 (Lcn2) 介导的宿主天生的免疫力.
- 抑制IroB是一种潜在的治疗策略,可以对抗IroA携带的病原体.
研究的目的:
- 为了研究IroB的活性部位特性,使用肠杆菌素类似物.
- 为了确定IroB活动的新型抑制剂.
- 探索针对细菌免疫逃避机制的潜在抗生素开发.
主要方法:
- 合成和测试带有修改的2,3-二基子环的肠杆菌类同类物.
- 酶抑制试验是为了评估对IroB. enterobactin类似物对IroB.的功效.
- 结构-活性关系分析以了解抑制剂结合.
主要成果:
- 在2,3-二基醇环的C5位置化的肠杆菌类类似物被确定为强大的IroB抑制剂.
- 这些改性类似物有效地阻断了IroB.的C-糖化活性.
- 这些发现提供了关于IroB活性部位和抑制剂设计的见解.
结论:
- 化肠杆菌类类似物是IroB的有效抑制剂.
- 用这些抑制剂向IroB代表了开发新抗生素的有希望的方法.
- 这种策略可以对抗由致病性细菌引起的感染,采用IroB介导的免疫逃避.
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