《植物生理学报》 2016, 52(5): 591-598

植物exocyst复合体的功能

曹雅君, 高志勇^*

武汉大学生命科学学院, 杂交水稻国家重点实验室, 武汉430072

通信作者：高志勇；E-mail: zygao@whu.edu.cn

摘　要：

Exocyst是广泛存在于酵母及动植物中的一种八蛋白复合体, 它最先是在酵母中被发现的, 之后人们在植物中也发现了该复合体, 并探究了它在植物细胞的功能。由于exocyst中的EXO70亚基在植物中数量很多, 所以很有可能不同的EXO70亚基会组成不同的exocyst复合体, 各exocyst在植物体内有着不同的功能。本文主要介绍exocyst各亚基间的相互作用、各亚基与其他因子间的相互作用, 并详细阐述迄今为止发现的exocyst的各种功能: 即其在非常规蛋白分泌、病原体防御、植物细胞壁的形成、细胞极化以及内膜运输中的作用。

关键词：exocyst; 非常规蛋白分泌; 病原体防御

收稿：2016-01-06   修定：2016-04-21

资助：国家自然科学基金(31270315)。

Functions of the exocyst complex in plants

CAO Ya-Jun, Gao Zhi-Yong^*

State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan 430072, China

Corresponding author: Gao Zhi-Yong; E-mail: zygao@whu.edu.cn

Abstract:

Eight proteins consist of the exocyst complex. In general, this complex exists in yeast, animals and plants. People firstly discovered the complex in yeast. A few years later, the exocyst was also found in land plants and known to have several functions. Considering the great number of the EXO70 subunit gene family, we think that each EXO70 subunit can compose different exocyst complexes, and there are specialized functions of different exocysts with different EXO70s. In this review, we introduce the interactions between the exocyst subunits and elaborate the functions of exocyst which researchers have discovered till now. These functions include their roles in unconventional protein secretion, pathogen resistance, cell wall formation, cell polarization and autophagy-related transporting.

Key words: exocyst; unconventional protein secretion; pathogen resistance