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首页> 美国卫生研究院文献>Frontiers in Plant Science >Extracellular signals and receptor-like kinases regulating ROP GTPases in plants
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Extracellular signals and receptor-like kinases regulating ROP GTPases in plants

机译：调节植物中ROP GTPases的细胞外信号和受体样激酶

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摘要

Rho-like GTPase from plants (ROPs) function as signaling switches that control a wide variety of cellular functions and behaviors including cell morphogenesis, cell division and cell differentiation. The Arabidopsis thaliana genome encodes 11 ROPs that form a distinct single subfamily contrarily to animal or fungal counterparts where multiple subfamilies of Rho GTPases exist. Since Rho proteins bind to their downstream effector proteins only in their GTP-bound “active” state, the activation of ROPs by upstream factor(s) is a critical step in the regulation of ROP signaling. Therefore, it is critical to examine the input signals that lead to the activation of ROPs. Recent findings showed that the plant hormone auxin is an important signal for the activation of ROPs during pavement cell morphogenesis as well as for other developmental processes. In contrast to auxin, another plant hormone, abscisic acid, negatively regulates ROP signaling. Calcium is another emerging signal in the regulation of ROP signaling. Several lines of evidence indicate that plasma membrane localized-receptor like kinases play a critical role in the transmission of the extracellular signals to intracellular ROP signaling pathways. This review focuses on how these signals impinge upon various direct regulators of ROPs to modulate various plant processes.
机译：来自植物（ROP）的Rho样GTPase充当信号开关，控制各种细胞功能和行为，包括细胞形态发生，细胞分裂和细胞分化。拟南芥基因组编码11个ROP，与形成Rho GTPases多个亚科的动物或真菌相反，形成了一个独特的亚科。由于Rho蛋白仅在其GTP结合的“活性”状态下结合其下游效应蛋白，因此上游因子激活ROPs是调节ROP信号传导的关键步骤。因此，检查导致ROP激活的输入信号至关重要。最近的发现表明，植物激素生长素是路面细胞形态发生过程中ROPs激活以及其他发育过程的重要信号。与生长素相反，另一种植物激素脱落酸对ROP信号负调控。钙是ROP信号调节中另一个新兴的信号。几条证据表明，质膜定位受体样激酶在将细胞外信号传递到细胞内ROP信号通路中起关键作用。本文的重点是这些信号如何影响ROP的各种直接调节器以调节各种工厂过程。

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