相关实验视频

Updated: May 16, 2025

Exploring the Arginine Methylome by Nuclear Magnetic Resonance Spectroscopy

Exploring the Arginine Methylome by Nuclear Magnetic Resonance Spectroscopy

Published on: December 16, 2021

在Acinetobacter baumannii中氨酸的利用对于肺炎的发病是必不可少的,并且受到毒性调节器GacA的调节

Kuldip Devnath¹, Avik Pathak¹, Perwez Bakht¹

¹Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India.

Infection and immunity

|April 2, 2025

概括

宝曼尼菌 (Acinetobacter baumannii) 使用氨酸糖转移酶 (AST) 途径代谢氨酸,氨酸是感染期间的关键营养素. 破坏这种途径显著降低了细菌的毒性,这表明它是潜在的药物标.

科学领域:

微生物学微生物学
病变的发生和发病.
细菌的新陈代谢

背景情况:

感染部位的营养物质可用性会影响细菌病变的发生.
脊椎动物的肺部为病原体生长提供阿尔金氨酸等氨基酸.
氨酸代谢对于细菌的生存和毒性至关重要.

研究的目的:

为了研究氨酸代谢途径在Acinetobacter baumannii病理生理学中的作用.
为了确定在A. baumannii.中占主导地位的氨酸代谢途径.
探索这种途径作为抗菌药物点的潜力.

主要方法:

分析氨酸糖转移酶 (AST) 途径基因和操作子结构.
一个AST路径删除突变的构建和表征.
在小鼠肺炎感染模型中评估细菌毒性.
确定AST操作的监管机制.

主要成果:

氨酸糖转移酶 (AST) 途径是A. baumannii.中氨酸代谢的主要途径.
AST通路基因被保存并组织成一个操作子.
AST途径删除突变不能利用阿金作为碳来源.
在体内,AST通路的破坏严重减弱了A. baumannii的毒性.
GacA被确定为AST操作子的积极调节者.

结论:

通过AST途径利用氨酸对于A. baumannii的毒性至关重要.
AST通路及其调节器GacA代表了针对A. baumannii的抗菌策略的新目标.
准阿金宁代谢为开发针对A. baumannii感染的新疗法提供了一个有希望的途径.

关键词:

在BAL流体中使用BAL流体.抗生素耐药性抗生素耐药性阿尔金因的代谢过程医院内感染的疾病.

更多相关视频

Workflow Based on the Combination of Isotopic Tracer Experiments to Investigate Microbial Metabolism of Multiple Nutrient Sources

Workflow Based on the Combination of Isotopic Tracer Experiments to Investigate Microbial Metabolism of Multiple Nutrient Sources

Published on: January 22, 2018

Characterization of Membrane Transporters by Heterologous Expression in E. coli and Production of Membrane Vesicles

Characterization of Membrane Transporters by Heterologous Expression in E. coli and Production of Membrane Vesicles

Published on: December 31, 2019

相关概念视频

Urea Cycle

Urea Cycle

The urea cycle describes how liver cells convert ammonia to urea. Ammonia is a toxic waste product of protein catabolism. Land animals must convert ammonia into the less toxic urea which can be safely eliminated by the kidneys through urine. Marine animals excrete ammonia directly, and the surrounding water dilutes the ammonia to safe levels.

Preparation of Amines: Reductive Amination of Aldehydes and Ketones

Preparation of Amines: Reductive Amination of Aldehydes and Ketones

Carbonyl compounds and primary amines undergo reductive amination first to produce imines, followed by secondary amines in the same reaction mixture, using selective reducing agents like sodium cyanoborohydride or sodium triacetoxyborohydride. Reductive amination produces different degrees of substitution of amines depending on the starting amine substrate.

Overview of Protein Metabolism

Overview of Protein Metabolism

Proteins are broken down into amino acids during digestion. Unlike fats and carbohydrates, which are stored for later use, proteins are not. Instead, amino acids are either used to produce ATP through oxidation or contribute to the creation of new proteins for the growth and repair of the body. Any surplus amino acids from the diet are converted into glucose or triglycerides rather than excreted.
Amino acids play various roles in the body once they are absorbed into cells. They are restructured...

Spare Receptors

Spare Receptors

Some receptors remain unoccupied even when an agonist produces a maximal response. Such empty ones are called spare receptors. In presence of spare receptors the maximum effect of an agonist drug is achieved with fewer than 100% of the receptors being occupied. To determine the presence of spare receptors, scientists often compare the concentration of the drug needed to produce 50% of the maximum effect (EC50) with the concentration of the drug needed to occupy 50% of the receptors (Kd). If the...

Nitric Oxide Signaling Pathway

Nitric Oxide Signaling Pathway

Nitric oxide (NO), an inorganic gas, acts as a potent second messenger in most animal and plant tissues. NO diffuses out of the cells that produce it and enters the neighboring cells to generate a downstream response. NO synthase (NOS) catalyzes NO production by the deamination of the amino acid arginine. There are three isoforms of NOS. Endothelial cells have endothelial NOS (eNOS), nerve and muscle cells have neuronal NOS (nNOS), and macrophages produce inducible NOS (iNOS) upon exposure...

Muscle Recovery and Fatigue

Muscle Recovery and Fatigue

Muscle fatigue refers to the decline in a muscle's ability to maintain the force of contraction after prolonged activity. It primarily stems from changes within muscle fibers. Even before experiencing muscle fatigue, one may feel tired and have the urge to stop the activity. This response, known as central fatigue, occurs due to changes in the central nervous system, namely the brain and spinal cord. While there is no single mechanism that induces fatigue, it may serve as a protective...