Aquaporin-2 protein dynamics within the cell

Aquaporin-2 protein dynamics within the cell
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细胞内 Aquaporin-2 蛋白动态

DOI:
10.1097/mnh.0b013e32818b27bf
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发表时间:
2007
影响因子:
3.2
通讯作者:
Yumi Noda
Yumi Noda
中科院分区:
医学3区
文献类型:
--
作者:
S. Sasaki;Yumi Noda

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目的水通道蛋白-2是一种水通道蛋白,存在于肾脏集合管细胞的顶膜上,在尿液浓缩能力中起关键作用。像其他膜蛋白一样,水通道蛋白-2在细胞内经历了动态的过程:合成,定位于亚顶区,排出到顶膜,内吞,循环,最后降解。对这些事件的分子和细胞机制的了解正在迅速发展,并对表征这些过程的最新发现进行了综述。最新发现高张力本身通过张力反应增强子及其转录因子刺激水通道蛋白-2的表达。人类肾源性尿崩症的基因靶向小鼠模型显示了水通道蛋白-2的C末端在根尖分选中的重要性,并提供了机械方面的见解。肌动蛋白细胞质在水通道蛋白-2向根尖膜排出中的重要性的证据正在积累。肌动蛋白和其他蛋白质与水通道蛋白-2结合,形成多蛋白复合体。新的蛋白质组学分析表明,一大系列蛋白质参与了水通道蛋白-2的动态变化。摘要在蛋白质水平上对水通道蛋白-2动力学的了解在过去几年中有了长足的进步,持续的研究将为开发新的操作方法或药物来操纵肾脏水稳态开辟新的途径。
Purpose of reviewAquaporin-2 is an aquaporin water channel protein present at the apical membrane of kidney collecting duct cells and plays a key role in urine concentrating ability. Like other membrane proteins, aquaporin-2 undergoes dynamic processes within the cells: synthesized, targeted to the subapical region, exocytosed to the apical membrane, endocytosed, recycled and finally degraded. The understanding of the molecular and cellular mechanisms of these events is advancing rapidly, and recent new findings characterizing such processes are reviewed. Recent findingsHypertonicity itself stimulates aquaporin-2 expression through the tonicity-responsive enhancer and its transcription factors. Gene targeted mouse models for human nephrogenic diabetes insipidus show the importance of the C-terminus of aquaporin-2 in apical sorting and provide mechanistic insights. Evidence for the importance of actin cytoskelton in exocytosis of aquaporin-2 to the apical membrane is accumulating. Actin and other proteins bind to aquaporin-2 and make a multiprotein complex. New proteomic analyses indicate the involvement of a large series of proteins in aquaporin-2 dynamics. SummaryThe protein-level understanding of aquaporin-2 dynamics has advanced considerably over the past few years, and continuing studies will open a new way in developing new manoeuvres or drugs to manipulate kidney water homeostasis.
DOI: 10.1016/j.bbamem.2006.06.001
发表时间: 2006-08
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影响因子: --
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DOI: 10.1152/ajpcell.1993.265.3.c757
发表时间: 1993
期刊: The American journal of physiology
影响因子: --
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DOI: 10.1152/ajprenal.00179.2003
发表时间: 2004-02-01
影响因子: 4.2
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