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公司名称: AppliChem
产品编号: A0970
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TetR Regulated in vivo Repression Technology to Identify Conditional Gene Silencing in Genetically Engineerable Bacteria Using Vibrio cholerae Murine Infections as Model System
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Date:
2020-10-05
[Abstract]  Investigation of bacterial gene regulation upon environmental changes is still a challenging task. For example, Vibrio cholerae, a pathogen of the human gastrointestinal tract, faces diverse transient conditions in different compartments upon oral ingestion. Genetic reporter systems have been demonstrated to be extremely powerful tools to unravel gene regulation events in complex conditions, but so far focused mainly on gene induction. Herein, we describe the TetR-controlled recombination-based in vivo expression technology TRIVET, which allows detection of gene silencing ... [摘要]  [摘要]研究细菌基因对环境变化的调控仍然是一项艰巨的任务。例如,人胃肠道的病原体霍乱弧菌在口服后会在不同的隔室中遇到各种短暂的状况。事实证明,遗传报告系统是揭示复杂条件下基因调控事件的极有力工具,但到目前为止,它主要集中在基因诱导上。在本文中,我们描述了基于TetR控制的重组的体内表达技术TRIVET,该技术可检测基因沉默事件。TRIVET类似于体内表达技术(IVET)以及基于重组的体内变异体 表达技术(RIVET),用于鉴定宿主定殖过程中几种细菌的条件基因诱导。像它的前辈一样,TRIVET是一个基于单细胞的报告系统,可以通过耐药谱的表型变化以时空方式分析细菌基因的阻遏。简而言之,无启动子的tetR (编码转录阻遏物TetR)可通过转座子诱变随机地整合到细菌基因组中,或通过同源重组在目标启动子的下游特异性整合到细菌基因组中。的TetR导致的去阻遏的转录表达的减少的TetR控制解离TNPR,这反过来又导致切除ö F A Ñ抗生素抗性盒(也称为RES-盒)和改变的电阻曲线可观察到的通过划线上氨苄青霉素和卡那霉素板。然后可以将这种改变量化为抗性和非抗性分离株之间的比例。此外,新引入的第二报道基因,promot erless ...

Detection of ASC Oligomerization by Western Blotting
Author:
Date:
2017-05-20
[Abstract]  The apoptosis-associated speck-like protein with a caspase-recruitment domain (ASC) adaptor protein bridges inflammasome sensors and caspase-1. Upon inflammasome activation, ASC nucleates in a prion-like manner into a large and single platform responsible for the recruitment and the activation of caspase-1. Active caspase-1 will in turn promote the proteolytic maturation of the pro-inflammatory cytokine IL-1β. ASC oligomerization is direct evidence for inflammasome activation and its detection allows a read-out independent of caspase-1 and IL-1β. This protocol describes how to detect the ... [摘要]  具有半胱天冬酶募集区(ASC)衔接蛋白的凋亡相关斑点样蛋白桥联炎症体传感器和半胱天冬酶-1。在炎性体活化后,ASC以类似朊病毒的方式成核,成为负责募集和激活半胱天冬酶-1的大而单一的平台。活性胱天蛋白酶-1将反过来促进促炎细胞因子IL-1β的蛋白水解成熟。 ASC寡聚化是炎性体激活的直接证据,其检测允许读取与caspase-1和IL-1β无关。该方案描述了如何通过蛋白质印迹检测ASC的寡聚化。

背景 Inflammasomes是大量的多蛋白平台,其感测各种微生物,内源和环境胁迫因子,导致促炎IL-1细胞因子家族的成熟(Martinon等人,2002; Sharma和Kanneganti, 2016)。激活后,炎性细胞传感器通过pyrin结构域(PYD)-PYD同型相互作用募集衔接蛋白ASC。 ASC通过胱天蛋白酶激活和募集域(CARD)-CARD相互作用又结合半胱天冬酶-1,并有利于caspase-1的自我蛋白水解切割,导致IL-1β和IL-18的成熟(Hoss等人。,2016)。 Inflammasome激活引发ASC二聚体的超分子寡聚化成称为“ASC-specks”或“pyroptosome”(Fernandes-Alnemri等人,2007)的大交织原纤维。 ASC-speck / ...

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