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UltraPureTM Glycerol

UltraPure TM甘油

Company: Thermo Fisher Scientific
Catalog#: 15514011
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Separation and Detection of Phosphorylated and Nonphosphorylated BvgA, a Bordetella pertussis Response Regulator, in vivo and in vitro
Author:
Date:
2013-11-20
[Abstract]  Protein phosphorylation plays a central role in signal transduction in bacteria. However, separation and detection of the phosphorylated protein from its nonphosphorylated form remain challenging. Here we describe a method to detect phosphorylation of the Bordetella pertussis response regulator BvgA, which is phosphorylated at an aspartate residue (Boulanger et al., 2013). This method is based on the proprietary adduct, Phos-tagTM, a dinuclear metal complex, which together with Zn2+ or Mn2+, forms a complex with a phosphomonoesterdianion, such as the phosphorylated aspartate of a response regulator (Barbieri and Stock, 2008; Kinoshita and Kinoshita-Kikuta, 2011). For in vivo detection, B. pertussis cells are lysed in ... [摘要]  蛋白质磷酸化在细菌的信号转导中起着中心作用。然而,从其非磷酸化形式分离和检测磷酸化蛋白仍然是挑战性的。在这里我们描述了检测百日咳博德特氏菌响应调节剂BvgA的磷酸化的方法,其在天冬氨酸残基被磷酸化(Boulanger等人,2013)。该方法基于专有的加合物Phos-tag TM sup/TM,其是双核金属络​​合物,其与Zn 2+或Mn 2+反应, ,与磷酸二酯酶形成复合物,例如应答调节剂的磷酸化天冬氨酸(Barbieri和Stock,2008; Kinoshita和Kinoshita-Kikuta,2011)。对于体内检测,在4℃下在轻度甲酸中裂解百日咳细胞以使磷酸 - 天冬氨酸键的破坏最小化,并且通过包含Phos标签的电泳(SDS-PAGE)将磷酸化的BvgA从其非磷酸化形式分离> TM 。随后通过蛋白质印迹分析检测两种形式的BvgA。还容易实现在体外用乙酰磷酸盐处理后形成的磷酸化BvgA的水平的量化。因此,该技术允许容易地评估B中BvgA磷酸化的水平。百日咳和 。大肠杆菌在不同实验室条件下在体内或在不同反应条件下在体外磷酸化后(本研究部分由NIH的Intramural Research Programme支持, NIDDK)。

DAB Staining and Visualization of Hydrogen Peroxide in Wheat Leaves
Author:
Date:
2012-12-20
[Abstract]  The production of hydrogen peroxide (H2O2) has been recognized as an important feature of plant cells that undergo programmed cell death (PCD) during host-pathogen interaction. Thordal-Christensen et al. (1997) first described a method using chemical 3,3-diaminobenzidine (DAB) to detect the presence and distribution of H2O2 in barley leaves challenged by the powdery mildew fungus (Thordal-Christensen et al., 1997). Since then, this method has been adapted to many other plant species for in situ detection of H2O2. Here, we describe a modified protocol to stain and visualize H2O2 production in wheat leaves during infection by the necrotrophic fungus, Stagonospora ... [摘要]  过氧化氢(H 2 O 2 O 2)的产生已被认为是在宿主 - 病原体相互作用期间经历程序性细胞死亡(PCD)的植物细胞的重要特征。 Thordal-Christensen等人(1997)首先描述了使用化学3,3-二氨基联苯胺(DAB)检测H 2 O 2基团的存在和分布的方法, (Thordal-Christensen等人,1997)攻击的大麦叶中的抗性。 从那时起,该方法已经适应于许多其它植物物种用于原位检测H 2 O 2 O 2。 在这里,我们描述了在感染期间通过坏死性真菌,角叉状瘤或由产生的坏死营养效应物的浸润来染色和可视化小麦叶中H 2 O 2 O 2产生的修饰的方案 真菌。 该方法的简短版本已经在(Liu等人2012年)中报道。

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