酸盐与 siderophores 结合:结构和稳定性
Wesley R Harris1, Shady A Amin, Frithjof C Küpper
1Department of Chemistry and Biochemistry, San Diego State University, San Diego, California 92182-1030, USA.
Journal of the American Chemical Society
|September 14, 2007
概括
某些 siderophores 结合,而不仅仅是铁. 这种意想不到的亲和力,取决于特定的化学组,表明在海洋细胞信号传递和吸收中的作用.
科学领域:
- 生物化学 生物化学
- 环境化学环境化学
- 微生物学 微生物学
背景情况:
- 赛德罗是一种细菌的铁化剂.
- 在海洋环境中是必不可少的.
- 的生物作用尚未完全理解.
研究的目的:
- 研究 siderophore-boron 的相互作用.
- 确定结合的结构要求.
- 探索-赛德罗复合物的潜在生物功能.
主要方法:
- 电子喷射电离质谱仪 (ESI-MS). 电子喷射电离质谱仪.
- 多核核磁共振 (NMR) 光谱学. 多核核磁共振 (NMR) 光谱学.
- 密度函数理论 (DFT) 的计算.
- 测量的结合常数.
主要成果:
- 带有酸盐或甲基酸盐群的 siderophores 结合.
- 复合物与振动,树脂和石菌素的特征.
- 在海洋pH值下测量的显著结合常量.
- 结合会诱导出一个明显的 siderophore 形状.
结论:
- 特定的 siderophores 呈现出意想不到的亲和力.
- 在海洋环境中可能会形成- siderophore 复合体.
- 假设生物吸收和细胞信号传递中的潜在作用.
- 形状变化允许区分铁和的结合作用.
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