| Rubisco Extraction and Purification from Diatoms
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Author:
Date:
2017-03-20
[Abstract] This protocol describes a method to extract ribulose-1,5-bisphosphate carboxylase oxygenase (Rubisco) from diatoms (Bacillariophyta) to determine catalytic performance. This protocol has been adapted from use in cyanobacteria and higher plants (Andrews, 1988; Whitney and Sharwood, 2007). First part (steps A1-A3) of the extraction provides a crude extract of Rubisco that is sufficient for carboxylation assays to measure the Michaelis constant for CO2 (KC) and the catalytic turnover rate (kcatc). However, the further purification steps outlined (steps B1-B4) are needed for measurements of Rubisco CO2/O2 Specificity (SC/O, [Kane et al., 1994]).
[摘要] 该方案描述了从硅藻（“芽孢杆菌”）提取核酮糖-1,5-二磷酸羧化酶加氧酶（Rubisco）的方法以确定催化性能。该方案已经在蓝细菌和高等植物中得到了应用（Andrews，1988; Whitney and Sharwood，2007）。提取的第一部分（步骤A1-A3）提供Rubisco的粗提取物，其足以用于羧化测定以测量CO 2（K 3 C）的Michaelis常数和催化更换率（ k c ）。然而，为了测量Rubisco CO 2 / O 2特异性（S C / O ）需要进一步的纯化步骤（步骤B1-B4） >，[Kane等人，1994]）。背景 核酮糖-1,5-二磷酸羧化酶加氧酶（Rubisco，EC 4.1.1.39）催化了CO 2光合同化的第一步，因此在光合作用和全球碳循环中起着重要的作用。 Rubisco已经从古菌，细菌，藻类和植物的各种生物体中分离出来，并且在生物体之间显示出各种各样的动力学（Galmes等人，2014年; Tcherkez等人，2006; Whitney等人，2011）。 Rubisco动力学的知识是了解光合作用以及因此碳的生物沉积物对人为CO ...
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| Vesicle Isolation from Bacillus subtilis Biofilm
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Author:
Date:
2015-03-05
[Abstract] Bacterial biofilms are associated clinically with many bacterial infections including those caused by bacteria such as Pseudomonas aeruginosa and Staphylococcus aureus. In recent years, extracellular vesicles produced by bacteria have been isolated from biofilm communities. Vesicles have been described in depth and can encapsulate various virulence factors including toxins and immunomodulatory compounds. Vesicles may be important for virulence and survival by serving as a vehicle for the secretion and concentrated delivery of these molecules. Studying extracellular vesicles is an important step towards understanding biofilm formation, structure, and disruption with the ultimate goal of preventing or treating hospital infections caused by bacterial pathogens residing in ...
[摘要] 细菌生物膜临床上与许多细菌感染相关，包括由细菌如绿脓杆菌和金黄色葡萄球菌引起的细菌感染。 近年来，由细菌产生的胞外囊泡已经从生物膜群落中分离。 囊泡已经被深入描述并且可以包封各种毒力因子，包括毒素和免疫调节化合物。 通过作为这些分子的分泌和浓缩递送的载体，囊泡可能对于毒力和存活是重要的。 研究胞外囊泡是理解生物膜形成，结构和破裂的重要步骤，其最终目的是预防或治疗由存在于生物膜中的细菌病原体引起的医院感染。 在这里我们描述了从枯草芽孢杆菌生产的生物膜中分离囊泡的方案。
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| Construction of FWPV Chimaeric MVA
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Author:
Date:
2015-01-05
[Abstract] Construction of chimaeric MVA is a useful tool with which to study gene function of related viruses. The protocol given here describes MVA chimaeras containing genes from Fowlpox virus (FWPV), although this can be applied to DNA derived from other organisms. There are a number of steps required to make the chimaeric MVA: 1) Purification of viral particles; 2) Extraction of DNA from purified viral particles; 3) Assembly of linear recombination templates; 4) Transfection of linear recombination templates; 5) Selection of chimaeric MVA.
Note: This procedure uses live virus, and should be conducted using Good Microbiological Practice, in accordance with international and national biocontainment requirements. This procedure also involves Genetic Modification of microorganisms, and ...
[摘要] 嵌合MVA的构建是研究相关病毒的基因功能的有用工具。 本文给出的方案描述了含有来自鸡痘病毒（FWPV）的基因的MVA嵌合体，尽管这可以应用于来自其他生物体的DNA。 制备嵌合MVA需要许多步骤：1）病毒颗粒的纯化; 2）从纯化的病毒颗粒中提取DNA; 3）装配线性重组模板; 4）线性重组模板的转染; 5）嵌合MVA的选择。
注意：此程序使用活病毒，并应根据国际和国家生物承诺要求使用良好微生物实践进行。 该程序还涉及微生物的遗传修饰，并且在开始前应获得适当的安全批准。
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