How important is the phosphatase activity of sensor kinases?

How important is the phosphatase activity of sensor kinases?
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DOI:
10.1016/j.mib.2010.01.013
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发表时间:
2010-04
影响因子:
5.4
通讯作者:
Kenney, Linda J.
Kenney, Linda J.
中科院分区:
生物学2区
文献类型:
--
作者:
Kenney, Linda J.

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在双组分信号系统中,磷酸化的反应调节因子(RR)通常被其伴侣激酶去磷酸化,以控制磷酸化RR(RR~P)的体内浓度。这种活性很容易在体外证明,但这些实验通常使用非常高浓度的组氨酸激酶(HK)相比,RR~ P。许多双组分系统表现出精密控制的比例HK RR在体内。因此,出现的问题是,是否磷酸酶活性的香港是显着的在体内。本审查报告将探讨这一专题。
In two-component signaling systems, phosphorylated response regulators (RRs) are often dephosphorylated by their partner kinases in order to control the in vivo concentration of phospho-RR (RR~P). This activity is easily demonstrated in vitro, but these experiments have typically used very high concentrations of the histidine kinase (HK) compared to the RR~P. Many two-component systems exhibit exquisite control over the ratio of HK to RR in vivo. The question thus arises as to whether the phosphatase activity of HKs is significant in vivo. This topic will be explored in the present review.
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