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MgCl2·6H2O

氯化镁六水合物

Company: Carl Roth
Catalog#: 2189
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ARP2/3 Phosphorylation Assay in the Presence of Recombinant Bacterial Effectors
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Date:
2017-04-05
[Abstract]  The Actin-Related Protein 2/3 (ARP2/3) complex is an actin nucleator that generates a branched actin network in mammalian cells. In addition to binding nucleation promoting factors, LeClaire et al. demonstrated that its phosphorylation state is essential key for its activity (LeClaire et al., 2008). In cells, the ARP2/3 complex is phosphorylated on threonine and tyrosine residues of the ARP2, ARP3, and ARPC1 subunits (Vadlamudi et al., 2004; LeClaire et al., 2008; Narayanan et al., 2011; LeClaire et al., 2015). In particular, phosphorylation of threonine 237 and 238 of the ARP2 subunit is necessary to allow a change in the ARP2/3 complex structure to its active conformation (Narayanan et al., 2011; LeClaire et al., ... [摘要]  肌动蛋白相关蛋白2/3(ARP2 / 3)复合物是在哺乳动物细胞中产生支链肌动蛋白网络的肌动蛋白成核剂。除了结合成核促进因子之外,LeClaire等人。证明其磷酸化状态是其活性的关键(LeClaire等人,2008)。在细胞中,ARP2 / 3复合物在ARP2,ARP3和ARPC1亚基的苏氨酸和酪氨酸残基上磷酸化(Vadlamudi等人,2004; LeClaire等人)。 ,2008; Narayanan等人,2011; LeClaire等人,2015)。特别地,ARP2亚基的苏氨酸237和238的磷酸化对于允许将ARP2 / 3复合物结构改变为其活性构象是必要的(Narayanan等人,2011; LeClaire等人al ,2015)。虽然对于真核细胞中的许多功能很重要,但ARP2 / 3复合物活性也有利于多种细胞病原体(Haglund和Welch,2011; Welch和Way,2013)。最近,我们证明细菌病原体,嗜肺军团菌,使用注射在宿主细胞质细胞中的细菌蛋白激酶来操纵ARP2 / 3复合磷酸化状态(Michard等人,2015) )。在这里,我们描述如何测试细菌蛋白激酶或另一种蛋白激酶在体外上下文中磷酸化ARP2 / 3复合物的能力。首先,产生和纯化ARP2 / 3复合物和细菌蛋白激酶。然后,将纯化的蛋白质在ATP存在下培养,并通过Western印迹分析ARP2 / ...

Quantitative Image Analysis of Membrane Microdomains Labelled by Fluorescently Tagged Proteins in Arabidopsis thaliana and Nicotiana benthamiana
Author:
Date:
2015-06-05
[Abstract]  We have recently characterized co-existing membrane microdomains that are labeled by different proteins in living plant cells (Jarsch et al., 2014). For this approach we first created a digital fingerprint for each of the twenty marker proteins using quantitative image analysis. Here we recorded parameters such as domain size, density and shape based on image segmentation. We found highly reproducible patterns of any of the proteins over a large number of biological replicates. Furthermore we exclusively acquired images from lowly expressing cells and chose our imaging conditions in a way that resulted in images where no pixel was saturated.

This protocol describes in detail the methods that have been used to analyze quantitative differences in localization of members ...
[摘要]  我们最近描述了在活植物细胞中由不同蛋白质标记的共存膜微结构域(Jarsch等人,2014)。对于这种方法,我们首先使用定量图像分析为二十个标记蛋白质中的每一个创建数字指纹。这里我们基于图像分割记录诸如域大小,密度和形状的参数。我们发现任何蛋白质的高度可重复的模式在大量的生物复制。此外,我们专门从低表达细胞中获取图像,并选择我们的成像条件以产生没有像素饱和的图像。
该方案详细描述了用于分析成员的定位差异的方法的拟南芥(Arabidopsis thaliana)和本塞姆氏烟草(Nicotiana benthamiana)的膜微结构域中的remorin蛋白家族(Jarsch等人,2014)。蛋白质单独地或成对地表达为相应植物中的荧光团融合体。使用标准共焦激光扫描显微镜(CLSM)进行图像采集,并使用ImageJ进行图像分析。

[简介] ...

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