Single domain response regulators: molecular switches with emerging roles in cell organization and dynamics.

Single domain response regulators: molecular switches with emerging roles in cell organization and dynamics.
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DOI:
10.1016/j.mib.2009.01.010
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发表时间:
2009-04
影响因子:
5.4
通讯作者:
Galperin, Michael Y.
Galperin, Michael Y.
中科院分区:
生物学2区
文献类型:
--
作者:
Jenal, Urs;Galperin, Michael Y.

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单域反应调节子(SD-RR)是双组分磷酸化途径的信号成分,含有磷酸化受体结构域,但缺乏专用的输出结构域。大肠杆菌蛋白Chey是该家族的典型成员,通过传递化学受体和鞭毛开关之间的信息来调节趋化性。新的数据提供了几种细菌中Chey介导的运动性控制的更复杂的图景,并表明了控制细胞马达的不同机制。此外,在了解SD-RRs的细胞功能方面取得了进展,而不仅仅是趋化作用。我们回顾了最近的报道,表明SD-RRs是一个多功能的分子开关家族,作为空间组织者和/或组氨酸蛋白激酶的变构调节器,有助于细胞的组织和动力学。
Single domain response regulators (SD-RRs) are signaling components of two-component phosphorylation pathways that harbor a phosphoryl receiver domain but lack a dedicated output domain. The E. coli protein CheY, the paradigm member of this family, regulates chemotaxis by relaying information between chemoreceptors and the flagellar switch. New data provide a more complex picture of CheY-mediated motility control in several bacteria and suggest diverging mechanisms in control of cellular motors. Moreover, advances have been made in understanding cellular functions of SD-RRs beyond chemotaxis. We review recent reports indicating that SD-RRs constitute a family of versatile molecular switches that contribute to cellular organization and dynamics as spatial organizers and/or as allosteric regulators of histidine protein kinases.
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