GTPase networks in membrane traffic.

GTPase networks in membrane traffic.
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膜流量中的GTPase网络。

DOI:
10.1146/annurev-biochem-052810-093700
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发表时间:
2012
影响因子:
16.6
通讯作者:
Novick P
Novick P
中科院分区:
生物学1区
文献类型:
--
作者:
Mizuno-Yamasaki E;Rivera-Molina F;Novick P

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Ras GTdR超家族的Rab或ARF/Sar分支的成员几乎调节细胞内膜运输的每一步。越来越多的证据表明,这些GTP酶并不作为单独的代理人,而是通过各种机制相互联网,以协调运输的一个阶段的各个事件,并将整个运输途径的不同阶段联系在一起。这些机制包括鸟嘌呤核苷酸交换因子(GEF)级联、GTP酶激活蛋白(GAP)级联、与多个GTP酶结合的效应子以及交换因子-效应子相互作用产生的正反馈环。这些机制一起可以导致从一个GTcycle到下一个GTcycle的有序的一系列转换。由于每个GTdR招募一组独特的效应物,这些转换有助于定义与它们相关的膜室功能的变化。
Members of the Rab or ARF/Sar branches of the Ras GTPase super-family regulate almost every step of intracellular membrane traffic. A rapidly growing body of evidence indicates that these GTPases do not act as lone agents but are networked to one another through a variety of mechanisms to coordinate the individual events of one stage of transport and to link together the different stages of an entire transport pathway. These mechanisms include guanine nucleotide exchange factor (GEF) cascades, GTPase-activating protein (GAP) cascades, effectors that bind to multiple GTPases, and positive-feedback loops generated by exchange factor-effector interactions. Together these mechanisms can lead to an ordered series of transitions from one GTPase to the next. As each GTPase recruits a unique set of effectors, these transitions help to define changes in the functionality of the membrane compartments with which they are associated.
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