Mammalian sprouty proteins assemble into large monodisperse particles having the properties of intracellular nanobatteries.

Mammalian sprouty proteins assemble into large monodisperse particles having the properties of intracellular nanobatteries.
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哺乳动物发芽蛋白组装成具有细胞内纳米电池特性的大单分散颗粒。

DOI:
10.1073/pnas.0506714102
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发表时间:
2005
期刊:
Proceedings of the National Academy of Sciences of the United States of America.
影响因子:
--
通讯作者:
McKnight,StevenL
McKnight,StevenL
中科院分区:
--
文献类型:
--
作者:
Wu,Xinle;Alexander,PeterB;He,Ying;Kikkawa,Masahide;Vogel,PiaD;McKnight,StevenL

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Sprouty蛋白作为受体酪氨酸激酶信号传导的细胞内抑制剂。在这里,我们表明,哺乳动物Sprouty2蛋白含有铁硫复合物,可以存在于氧化,还原或亚硝基化状态。纯化的Sprouty2组装成每个颗粒含有1024个多肽的大的单分散球体。生物化学实验表明,Sprouty2颗粒内的铁的电荷状态可以与周围的细胞内氧化还原绝缘。这些特征提供了一种可能性,即Sputy2颗粒能够以形式上等同于电池的方式接收、维持和耗散电荷。
Sprouty proteins act as intracellular inhibitors of receptor tyrosine kinase signaling. Here we show that the mammalian Sprouty2 protein contains an iron-sulfur complex that can exist in an oxidized, reduced, or nitrosylated state. Purified Sprouty2 assembles into large monodisperse spheres containing ≈24 polypeptides per particle. Biochemical experiments indicate that the charge state of the iron within Sprouty2 particles may be insulated from ambient intracellular redox. These features offer the possibility that Sprouty2 particles are capable of receiving, maintaining, and dissipating electrical charge in a manner formally equivalent to a battery.
DOI: 10.1101/gad.6.9.1668
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影响因子: 10.5
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