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KOH

氢氧化钾

公司名称: Sigma-Aldrich
产品编号: 221473
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Assay for Assessing Mucin Binding to Bacteria and Bacterial Proteins
Author:
Date:
2021-03-05
[Abstract]  

Legionella pneumophila, a Gram-negative bacterium and the causative agent of Legionnaires’ disease, exports over 300 effector proteins/virulence factors, through its type II (T2SS) and type IV secretion systems (T4SS). One such T2SS virulence factor, ChiA, not only functions as a chitinase, but also as a novel mucinase, which we believe aids ChiA-dependent virulence during lung infection. Previously published protocols manipulated wild-type L. pneumophila strain 130b and its chiA mutant to express plasmid-encoded GFP. Similarly, earlier studies demonstrated that wheat germ agglutinin

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[摘要]  [摘要]嗜肺军团杆菌是革兰氏阴性细菌,是军团菌病的病原体,通过其II型(T2SS)和IV型分泌系统(T4SS)出口了300多种效应蛋白/毒力因子。一种这样的T2SS毒力因子ChiA不仅起几丁质酶的作用,而且还起新型粘蛋白酶的作用,我们认为它可以在肺部感染期间帮助ChiA依赖性毒力。以前发表的协议操纵野生型肺炎嗜血杆菌130b菌株及其chiA突变体,以表达质粒编码的GFP。同样,较早的研究表明,小麦胚芽凝集素(WGA)可以进行荧光标记,并可以与粘蛋白结合。 在当前方案中,将GFP标记的细菌与II型和III型猪胃粘蛋白孵育,然后用TexasRed标记的WGA进行标记,并通过流式细胞术进行分析,以测量在有或没有HLA的情况下细菌与粘蛋白的结合。内源性ChiA。另外,我们分析了纯化的ChiA与II型和III型猪胃粘蛋白的结合。该方案将细菌和直接蛋白结合到粘蛋白上,并且是第一个使用WGA和流式细胞术分析革兰氏阴性细菌与粘蛋白结合的方法。



图形摘要:

自动生成手机说明的屏幕截图

评估细菌和蛋白质与粘蛋白结合的策略


[背景技术]嗜肺军团菌(LPN ),革兰氏阴性细菌,是军团病,肺炎的严重形式的病原体。L ...

Polyamine Transport Assay Using Reconstituted Yeast Membranes
Author:
Date:
2021-01-20
[Abstract]  

ATP13A2/PARK9 is a late endo-/lysosomal P5B transport ATPase that is associated with several neurodegenerative disorders. We recently characterized ATP13A2 as a lysosomal polyamine exporter, which sheds light on the molecular identity of the unknown mammalian polyamine transport system. Here, we describe step by step a protocol to measure radiolabeled polyamine transport in reconstituted vesicles from yeast cells overexpressing human ATP13A2. This protocol was developed as part of our recent publication (van Veen et al., 2020) and will be useful for characterizing the transport function of

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[摘要]  [摘要] ATP13A2 / PARK9是一种晚期内/溶酶体P5B转运ATPase,与多种神经退行性疾病有关。我们最近将ATP13A2表征为溶酶体多胺出口者,这为未知的哺乳动物多胺转运系统的分子身份提供了线索。在这里,我们逐步描述了从过量表达人ATP13A2的酵母细胞中测量重组囊泡中放射性标记的多胺转运的方案。该方案是我们最新出版物的一部分(van Veen等,2020),将有助于表征其他假定的多胺转运蛋白的转运功能,例如P5B转运ATPase的同工型。


[背景] ATP13A2 / PARK9编码一种普遍表达的晚期内-/溶酶体膜蛋白,与一系列神经退行性疾病有关,例如早发性帕金森氏病(Di Fonzo等,2007 ;Lin等,2008)和Kufor -Rakeb综合征(伴痴呆的早期帕金森病)(Ramirez等,2006 ;Park等,2011)。ATP13A2属于P型转运ATPase ,是一类活性转运蛋白,由于ATP水解而暂时形成磷酸中间产物(Kuhlbrandt ,2004年)。ATP13A2是P5亚家族的成员,该家族已在20多年前通过基因组测序鉴定出来(Axelsen和Palmgren ...

A Method for SUMO Modification of Proteins in vitro
Author:
Date:
2018-10-05
[Abstract]  The Small Ubiquitin-related Modifier (SUMO) is a protein that is post-translationally added to and reversibly removed from other proteins in eukaryotic cells. SUMO and enzymes of the SUMO pathway are well conserved from yeast to humans and SUMO modification regulates a variety of essential cellular processes including transcription, chromatin remodeling, DNA damage repair, and cell cycle progression. One of the challenges in studying SUMO modification in vivo is the relatively low steady-state level of a SUMO-modified protein due in part to the activity of SUMO deconjugating enzymes ... [摘要]  小泛素相关修饰物(SUMO)是一种蛋白质,其翻译后添加到真核细胞中并可逆地从其他蛋白质中去除。 SUMO和SUMO途径的酶从酵母到人类都很保守,SUMO修饰调节了多种基本细胞过程,包括转录,染色质重塑,DNA损伤修复和细胞周期进程。 研究SUMO修饰体内的挑战之一是SUMO修饰蛋白的相对低的稳态水平,部分原因是SUMO去缀合酶(SUMO Isopeptidases或SENPs)的活性。 幸运的是,使用重组SUMO酶可以在体外研究SUMO修饰。 在这里,我们描述了一种灵敏的方法,用于检测目标人类蛋白质的SUMO修饰,使用来自兔网织红细胞和放射性标记的氨基酸的体外转录和翻译系统。
【背景】与其他泛素蛋白家族修饰一样,SUMO修饰通过ATP依赖性酶促级联发生,涉及E1激活酶(人类中的Aos1 / Uba2异二聚体),E2结合酶(Ubc9)和许多E3连接之一的连续活性。酶(Gareau和Lima,2010)。具有SUMO缀合共有位点的蛋白质ΨKxE(Ψ是疏水残基,其后是赖氨酸,任何氨基酸和谷氨酸),可以通过哺乳动物中表达的一种或几种SUMO旁系同源物(包括SUMO1,SUMO2)进行有效修饰。或SUMO3(统称为SUMO2 / 3,因为它们的序列同源性为97%)(Gareau和Lima,2010; Flotho和Melchior,2013)。 ...

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