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Falcon® 14 mL Round Bottom Polystyrene Test Tube

公司名称: Corning
产品编号: 352051
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A Microfluidic Device for Massively Parallel, Whole-lifespan Imaging of Single Fission Yeast Cells
Author:
Date:
2018-04-05
[Abstract]  Whole-lifespan single-cell analysis has greatly increased our understanding of fundamental cellular processes such as cellular aging. To observe individual cells across their entire lifespan, all progeny must be removed from the growth medium, typically via manual microdissection. However, manual microdissection is laborious, low-throughput, and incompatible with fluorescence microscopy. Here, we describe assembly and operation of the multiplexed-Fission Yeast Lifespan Microdissector (multFYLM), a high-throughput microfluidic device for rapidly acquiring single-cell whole-lifespan imaging. ... [摘要]  整个寿命的单细胞分析极大地增加了我们对细胞老化等基本细胞过程的理解。为了观察整个寿命期间的个体细胞,必须从生长培养基中移除所有后代,通常通过手动显微切割。然而,手动显微切割费力,低通量,并且与荧光显微镜不兼容。在这里,我们描述了多路复用裂变酵母寿命显微解剖器(multFYLM)的组装和操作,这是一种用于快速获取单细胞全寿命成像的高通量微流体装置。 multFYLM从多达六种不同的遗传背景或治疗方案中捕获约一千个杆状裂殖酵母细胞。将固定的细胞荧光成像超过一周,而将子代细胞从装置中取出。得到的数据集产生记录每个细胞复制寿命的高分辨率多通道图像。我们预计multFYLM将广泛适用于裂殖酵母(Schizosaccharomyces pombe)和其他对称分裂的单细胞生物的单细胞整个寿命研究。

【背景】细胞衰老导致细胞功能的累积下降,最终导致死亡。大多数关于细胞衰老的研究侧重于模型单细胞生物的复制寿命,例如出芽酵母酿酒酵母(Nyström和Liu,2014; Wasko和Kaeberlein,2014; Wierman和Smith,2014; Ruetenik和Barrientos ,2015)。细胞的复制寿命(RLS)被定义为母细胞在其生命过程中产生的女儿的数量(Henderson和Gottschling,2008; Sutphin等人,2014)。 ...

Protein Expression and Purification of the Hsp90-Cdc37-Cdk4 Kinase Complex from Saccharomyces cerevisiae
Author:
Date:
2017-10-05
[Abstract]  Interactions between Hsp90, its co-chaperone Cdc37 and kinases have been biochemically studied for over three decades and have been shown to be functionally important in organisms from yeast to humans. However, formation of a stable complex for structural studies has been elusive. In this protocol we describe expression and purification of Hsp90-Cdc37-Cdk4 kinase protein complex from Saccharomyces cerevisiae utilizing the viral 2A sequences to titrate the three proteins at similar levels. [摘要]  Hsp90,其伴侣伴侣Cdc37和激酶之间的相互作用已经在三十多年的生物化学研究中被证明在酵母与人类的生物体内在功能上是重要的。 然而,形成一个稳定的结构研究复合物是难以捉摸的。 在该方案中,我们描述了利用病毒2A序列以相似水平滴定三种蛋白质的来自酿酒酵母的Hsp90-Cdc37-Cdk4激酶蛋白复合物的表达和纯化。
【背景】Hsp90分子伴侣与其客体激酶之间的稳定形成复合物已经被证明在体外是难治性的。以前的工作表明,Hsp90的共伴伴Cdc37与昆虫Sf9细胞中的客体激酶的过表达导致Sf9 Hsp90,外源Cdc37和外源激酶(Vaughan等人,2006)之间的稳定复合物。然而,昆虫细胞培养需要特殊的设备,比其他研究较好的表达系统(如细菌和酵母)要难以进行遗传操作,并且显着较慢地生长和克隆。上述蛋白质在E中的共表达。大肠杆菌不产生可溶性激酶/稳定复合物。我们认为,酿酒酵母将具有必要的机制来帮助折叠和促进复合物的形成,并试图通过共同表达这些蛋白质来产生人Hsp90β,人Cdc37和人Cdk4激酶之间的复合物, S上。酵母。为了获得三种蛋白质的化学计量表达,我们利用病毒2A肽,其允许三个蛋白质在一个mRNA上转录,随后在翻译阶段切割。该系统已被用于人类细胞系和兔网状细胞(Kim等人,2011; ...

Mating Based Split-ubiquitin Assay for Detection of Protein Interactions
Author:
Date:
2017-05-05
[Abstract]  The mating based split-ubiquitin (mbSUS) assay is an alternative method to the classical yeast two-hybrid system with a number of advantages. The mbSUS assay relies on the ubiquitin-degradation pathway as a sensor for protein-protein interactions, and it is suitable for the determination of interactions between full-length proteins that are cytosolic or membrane-bound. Here we describe the mbSUS assay protocol which has been used for detecting the interaction between K+ channel and SNARE proteins (Grefen et al., 2010 and 2015; Zhang et al., 2015 and 2016) [摘要]  基于交配的分ubiquitin(mbSUS)测定是具有许多优点的经典酵母双杂交系统的替代方法。 mbSUS测定依赖于泛素降解途径作为蛋白质 - 蛋白质相互作用的传感器,并且它适用于测定细胞溶质或膜结合的全长蛋白质之间的相互作用。在这里,我们描述了已经用于检测K + 通道和SNARE蛋白之间的相互作用的mbSUS测定方案(Grefen等人,2010和2015; Zhang 等等,2015和2016)

背景 图1是mbSUS测定的概况。泛素部分被分成两半,N末端半突变(NubG)以避免重组。泛素部分(Cub)的C末端一半与转录报告基因复合物PLV(Protein A-LexA-VP16)连接。两种蛋白质(X和Y)分别与NubG和CubPLV融合产生蛋白质 - 蛋白质相互作用分析系统。转化后,酵母菌株THY.AP5含有NubG-X融合蛋白,而酵母菌株THY.AP4含有Y-CubPLV融合蛋白。在交配后,在二倍体酵母中,如果蛋白质X和Y彼此相互作用,则将重新组装功能性泛素,这导致PLV的切割。释放的转录蛋白复合物PLV可以开启报告基因(ADE2,HIS3),并允许酵母生长在选择性培养基上。

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