相关实验视频

Updated: Mar 3, 2026

$Liquid Chromatography Coupled to Refractive Index or Mass Spectrometric Detection for Metabolite Profiling in Lysate-based Cell-free Systems$

Liquid Chromatography Coupled to Refractive Index or Mass Spectrometric Detection for Metabolite Profiling in Lysate-based Cell-free Systems

Published on: September 23, 2021

解读蓝藻细菌中L-lysine毒性的代谢细节

Andreas Enkerlin¹, Ute A Hoffmann², Johanna Rapp³

¹Microbial Biochemistry Group, Institute of Phototrophic Microbiology, Heinrich-Heine University Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany.

Plant physiology

|March 2, 2026

概括

L-氨酸 (Lys) 破坏蓝藻细菌的细胞壁和新陈代谢,影响生长. 一个基因选确定了Bgt透系统对于Lys耐药性至关重要,为开花控制提供了洞察力.

科学领域:

微生物学和生物化学
蓝藻细菌生理学蓝藻细菌生理学
代谢工程是代谢工程.

背景情况:

L-氨酸 (Lys) 显示出作为一种蓝菌杀菌剂的潜力,在微分子度下抑制蓝菌生长.
了解lys的代谢和生理作用对于其在花控制中的应用至关重要.

研究的目的:

研究Synechocystis sp.早期代谢和生理反应. PCC 6803对L-氨酸的暴露.
识别导致蓝藻细菌对L-lysine产生耐药性的遗传因素.

主要方法:

生理学分析包括细胞扩大,氧化应激和光合作用抑制测量.
代谢学分析,以确定代谢物水平的变化.
基于CRISPRi的基因查,以确定参与L-lysine耐药性的基因.

主要成果:

暴露于L-氨酸会导致细胞扩大,氧化应激,光合作用抑制和Synechocystis的生长停止.
代谢学数据显示,酸甘油的生物合成中断,氨基酸和能量代谢物水平发生变化.
Bgt浸透系统对于L-lysine耐药性至关重要;UirR和c-di-AMP信号通路都参与其中.

结论:

氨酸会影响酸甘油生物合成,氨基酸代谢和蓝藻细菌中的核酸生物合成.
Bgt浸透系统在L-lysine耐药性中发挥着关键作用.
研究结果提供了关于蓝藻细菌生理学的见解,以及L-氨酸在花控制方面的潜在应用.

关键词:

克里斯普里是指克里斯普里.细胞壁新陈代谢细胞壁新陈代谢蓝藻细菌是一种蓝藻细菌.素的毒性和耐药性素的毒性和耐药性氧化应激是一种氧化应激.c-di-AMP的信号传输方式

更多相关视频

Determination of the Glycogen Content in Cyanobacteria

Determination of the Glycogen Content in Cyanobacteria

Published on: July 17, 2017

Early Detection of Cyanobacterial Blooms and Associated Cyanotoxins using Fast Detection Strategy

Early Detection of Cyanobacterial Blooms and Associated Cyanotoxins using Fast Detection Strategy

Published on: February 25, 2021

相关概念视频

Overview of Metabolism

Overview of Metabolism

Living cells constantly carry out various chemical reactions which are necessary for their proper functioning. These reactions are interlinked to one another via multiple pathways. The collection of these chemical reactions is known as metabolism.
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...

Bacterial Phylum Cyanobacteria

Bacterial Phylum Cyanobacteria

Cyanobacteria are a diverse group of oxygenic, phototrophic bacteria that played a pivotal role in converting Earth’s atmosphere from anoxic to oxygen-rich billions of years ago. They exhibit remarkable morphological diversity, ranging from unicellular forms to filamentous types, with cell sizes varying between 0.5 μm and 100 μm. Cyanobacteria are classified into five groups: Chroococcales (unicellular, dividing by binary fission), Pleurocapsales (unicellular, dividing by...

Toxic Reactions: Overview

Toxic Reactions: Overview

When toxic substances penetrate the human body, they disseminate to various tissues, undergoing metabolic changes. This process yields reactive metabolites that may covalently bind with specific target molecules, resulting in toxicity.
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...

Lysosomal Hydrolases

Lysosomal Hydrolases

Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...

Metabolism of Chemolithotrophs

Metabolism of Chemolithotrophs

Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.

Amino Acid Catabolism

Amino Acid Catabolism

Microorganisms rely on proteins as an essential carbon and energy source, particularly in environments with limited polysaccharides or lipids. However, proteins are too large to cross the plasma membrane unaided, necessitating enzymatic degradation. Microbes secrete extracellular proteases and peptidases that hydrolyze proteins into peptides, which can then be transported across the membrane. Once inside the cell, intracellular proteases degrade these peptides into free amino acids, which...