尿素双酸盐区分糖转移酶超级家族
Leah M Seebald1, Pouya Haratipour2, Michaela R Jacobs2
1Department of Biology and Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
研究人员开发了新型尿素二酸盐 (UBPs),以抑制参与细菌糖合物合成的糖酶转移酶 (PGTs). 这些UBP揭示了不同PGT超级家族的独特结合机制,为向 prokaryotic 酶的新抗生素开发提供了潜力.
科学领域:
- 生物化学和分子生物学
- 碳水化合物化学
- 酶抑制作用
背景情况:
- 复杂的细菌糖结合物调解宿主-病原体和共生者的相互作用.
- 糖转移酶 (PGT) 通过转移糖来启动葡萄糖结合物生物合成.
- PGT存在于不同的多基和单基超级家族,具有不同的结构和机制.
研究的目的:
- 设计和合成新的尿素双酸盐 (UBP) 抑制剂
- 调查UBPs对多基 (WecA) 和单基 (PglC) PGT的抑制作用.
- 阐明不同PGT超级家族的独特连接方式.
主要方法:
- 一系列替代甲基双酸盐 (CXY-BP) 尿素双酸盐 (UBPs) 的合成.
- 评估UBP和UBP糖作为WecA (多种类型) 和PglC (单种类型) PGT的抑制剂.
- 结构与活性关系的分析,包括立体化学和糖分的结合.
主要成果:
- 不同的UBP表现出对WecA和PglC的不同抑制作用,表明它们具有不同的结合机制.
- 基于立体化学,CHF-BP对应物显示PglC的差异性抑制.
- 加入N-乙糖胺 (GlcNAc) 显著增强了对单PGT的结合亲和力.
结论:
- UBPs作为糖基转移酶的有价值的机械探针.
- 聚和单PGT超级家族之间的结合方式有显著差异.
- UBP糖对开发针对 prokaryotic 单PGT 的新型抗生素具有前景.
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