Vildanova M S, Wang W, Smirnova E A
Biological Faculty, Lomonosov Moscow State University, Moscow, 119234, Russia.
Biochemistry (Mosc). 2014 Sep;79(9):894-906. doi: 10.1134/S0006297914090065.
Microtubules, actin filaments, and Golgi apparatus are connected both directly and indirectly, but it is manifested differently depending on the cell organization and specialization, and these connections are considered in many original studies and reviews. In this review we would like to discuss what underlies differences in the structural organization of the Golgi apparatus in animal and plant cells: specific features of the microtubule cytoskeleton organization, the use of different cytoskeleton components for Golgi apparatus movement and maintenance of its integrity, or specific features of synthetic and secretory processes. We suppose that a dispersed state of the Golgi apparatus in higher plant cells cannot be explained only by specific features of the microtubule system organization and by the absence of centrosome as an active center of their organization because the Golgi apparatus is organized similarly in the cells of other organisms that possess the centrosome and centrosomal microtubules. One of the key factors determining the Golgi apparatus state in plant cells is the functional uniformity or functional specialization of stacks. The functional specialization does not suggest the joining of the stacks to form a ribbon; therefore, the disperse state of the Golgi apparatus needs to be supported, but it also can exist "by default". We believe that the dispersed state of the Golgi apparatus in plants is supported, on one hand, by dynamic connections of the Golgi apparatus stacks with the actin filament system and, on the other hand, with the endoplasmic reticulum exit sites distributed throughout the endoplasmic reticulum.
微管、肌动蛋白丝和高尔基体直接或间接地相连,但根据细胞的组织和特化情况,这种连接表现有所不同,许多原创研究和综述都探讨过这些连接。在本综述中,我们想讨论动物细胞和植物细胞中高尔基体结构组织差异的潜在原因:微管细胞骨架组织的特定特征、利用不同细胞骨架成分实现高尔基体移动及其完整性的维持,还是合成与分泌过程的特定特征。我们认为,高等植物细胞中高尔基体的分散状态不能仅用微管系统组织的特定特征以及缺乏作为其组织活动中心的中心体来解释,因为在具有中心体和中心体微管的其他生物体的细胞中,高尔基体的组织方式类似。决定植物细胞中高尔基体状态的关键因素之一是高尔基体堆叠的功能一致性或功能特化。功能特化并不意味着堆叠连接形成带状结构;因此,高尔基体的分散状态需要维持,但也可能“默认”存在。我们认为,植物中高尔基体的分散状态一方面由高尔基体堆叠与肌动蛋白丝系统的动态连接维持,另一方面由分布于整个内质网的内质网出口位点维持。