降低可切割的desferrioxamine B拉向系统丰富了来自Streptomyces蛋白质组的Ni (ii) - 超氧化物脱酶
Jenny Ni1, James L Wood1, Melanie Y White1,2
1School of Medical Sciences, The University of Sydney New South Wales 2006 Australia rachel.codd@sydney.edu.au.
RSC chemical biology
|November 30, 2023
概括
研究人员探索了 siderophore desferrioxamine B (DFOB) 树脂,以确定Streptomyces pilosus中的铁吸收蛋白. 意想不到的是,他们发现了apo-DFOB和超氧化物脱酶 (NiSOD) 之间的联系,这表明 siderophores 的作用更广泛.
科学领域:
- 生物化学 生物化学
- 蛋白质组学是指蛋白质组学.
- 微生物学 微生物学
背景情况:
- 赛德罗对于微生物的铁获取至关重要.
- 德斯费里奥胺B (DFOB) 是一种酸 siderophore.
- 了解蛋白质与 siderophores 的相互作用是微生物铁代谢的关键.
研究的目的:
- 使用DFOB基树脂选Streptomyces pilosus蛋白质组,以检测参与 siderophore介导铁吸收的蛋白质.
- 研究DFOB与微生物蛋白质的结合相互作用.
主要方法:
- 两种树脂的制备:一种含有自由DFOB连接物,另一种含有其Fe (III) 复合物,两种都具有用于蛋白质释放的二硫化键.
- 对与树脂结合的蛋白质进行蛋白质组学分析.
- 电子喷雾电离飞行时间质谱 (ESI-TOF-MS) 用于分析复杂的形成.
主要成果:
- 没有确定参与 siderophore 中介铁吸收的蛋白质.
- 超氧化物脱酶 (NiSOD) 在apo-DFOB树脂上得到了显著的丰富,但在Fe(iii) -DFOB或对照树脂上没有.
- 据ESI-TOF-MS证实,一个模型Ni(ii) -SOD和DFOB之间形成了一个三元复合体.
结论:
- 阿波-DFOB树脂可能与NiSOD形成了三元复合物,可能是由于NiSOD中暴露的,协调不和的Ni(ii) 离子.
- 这种相互作用表明, siderophore金属的协调特性可能会影响铁吸收之外的其他金属依赖的生物过程.
- DFOB-NiSOD复合物的生物学意义需要进一步调查.
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