{{'Search' | translate}}
 

Leica EM UC6 Ultramicrotome

Company: Leica Microsystems
Catalog#: Leica EM UC6
Bio-protocol()
Company-protocol()
Other protocol()

Examining Autophagy in Plant by Transmission Electron Microscopy (TEM)
Author:
Date:
2018-10-20
[Abstract]  In plants, macroautophagy, here referred as autophagy, is a degradation pathway during which the double-membrane structure named autophagosome engulfs the cargo and then fuses with vacuole for material recycling.

To investigate the process of autophagy, transmission electron microscopy (TEM) was used to monitor the ultrastructure of autophagic structures and identify the cargo during this process due to its high resolution. Compared to other autophagy examination methods including biochemical assays and confocal microscopy, TEM is the only method that indicates the morphology of autophagic structures in nanoscale, which is considered to be one of the best ways to illustrate the morphology of autophagic intermediates and the substrate of autophagy. Here, we describe the ...
[摘要]  在植物中,巨自噬,这里称为自噬,是一种降解途径,在此期间,称为自噬体的双膜结构吞噬货物,然后与液泡融合以进行材料回收。

为了研究自噬过程,透射电子显微镜(TEM)用于监测自噬结构的超微结构,并由于其高分辨率在此过程中识别货物。 与其他自噬检测方法(包括生化检测和共聚焦显微镜)相比,TEM是唯一能够显示纳米级自噬结构形态的方法,被认为是阐明自噬中间体形态和自噬基质的最佳方法之一。。 在这里,我们描述了使用TEM在 Nicotiana benthamiana >叶细胞中的自噬检测分析。

【背景】自噬是真核生物中高度保守的大分子降解途径(Dikic,2017)。在植物中,自噬是由几种胁迫条件诱导的,包括饥饿,氧化应激,盐胁迫和衰老(Doelling et al。>,2002; Hanaoka et al。>,2002; Liu et al。>,2005; Bassham,2007; Liu and Bassham,2009; Luo et al。>,2017)。在自噬期间,称为自噬体的双膜囊泡在细胞质中形成并转运到中央液泡中,其中自噬体的外膜与液泡膜融合。然后被称为自噬体的单膜结构进入液泡腔并最终降解(Ohsumi,2001; Liu和Bassham,2012)。

到目前为止,已经建立了许多检测植物自噬的方法。常用的检测方法是共聚焦显微镜,电子显微镜和生化方法。至于共聚焦显微镜检测,自噬标记包括与荧光蛋白融合的ATG8,ATG5和SH3P2用于标记自噬相关结构(Zhuang ...

Metal-tagging Transmission Electron Microscopy for Localisation of Tombusvirus Replication Compartments in Yeast
Author:
Date:
2018-04-20
[Abstract]  Positive-stranded (+) RNA viruses are intracellular pathogens in humans, animals and plants. To build viral replicase complexes (VRCs) viruses manipulate lipid flows and reorganize subcellular membranes. Redesigned membranes concentrate viral and host factors and create an environment that facilitates the formation of VRCs within replication organelles. Therefore, efficient virus replication depends on the assembly of specialized membranes where viral macromolecular complexes are turned on and hold a variety of functions. Detailed characterization of viral replication platforms in cells requires sophisticated imaging approaches. Here we present a protocol to visualize the three-dimensional organization of the tombusvirus replicase complex in yeast with MEtal-Tagging Transmission Electron ... [摘要]  正链(+)RNA病毒是人,动物和植物中的细胞内病原体。构建病毒复制酶复合物(VRC)病毒操纵脂质流动和重组亚细胞膜。重新设计的膜集中了病毒和宿主因子,并创造了促进复制细胞器内VRC形成的环境。因此,有效的病毒复制取决于病毒大分子复合物开启并具有各种功能的特殊膜的组装。细胞中病毒复制平台的详细特征需要复杂的成像方法。在这里我们提出一个协议,用肉眼标记透射电子显微镜(METTEM)可视化酵母中的tombusvirus复制酶复合物的三维组织。该协议使我们能够用METTEM和电子断层扫描成像三维病毒复制酶分子的细胞内分布。我们的研究显示病毒复制酶分子如何在特化细胞膜内构建复制复合物。

【背景】正链RNA病毒的复制取决于细胞膜的重塑。细胞内膜作为VRC装配的结构支架,提供调节病毒复制酶活性和保护病毒RNA免受宿主抗病毒防御的必需脂质和辅因子(Miller和Krijnse-Locker,2008; den Boon <等,2010; nagy和pogany,2011;="" nagy,2016)。电子显微镜观察到具有活性vrc的复制细胞器的结构。="" vrc以单个膜囊或'小球',管状球形立方体膜,双膜囊泡(dmv)或平面寡聚体阵列装配(de="" castro等人,2013)。通常在rna病毒感染的细胞中观察到小球。它们通过在各种细胞器中内陷而形成,并具有对胞质溶胶的狭窄开口(den="" boon="" et=""> ...

Comments