相关实验视频

Updated: Jul 15, 2025

Expression and Purification of Nuclease-Free Oxygen Scavenger Protocatechuate 3,4-Dioxygenase

Expression and Purification of Nuclease-Free Oxygen Scavenger Protocatechuate 3,4-Dioxygenase

Published on: November 8, 2019

通过表达 Pseudomonas putida catechol 1,2-dioxygenase 基因的 Escherichia coli 来降解 isoproturon 的生物降解

Nagwa I Elarabi¹, Abdelhadi A Abdelhadi², Amr A Nassrallah^3,4

¹Department of Genetics, Faculty of Agriculture, Cairo University, Giza, 12613, Egypt.

|September 26, 2023

概括

土壤细菌Pseudomonas putida和Acinetobacter johnsonii可以降解持久除草剂异素 (IPU). 具有 catA 基因的工程大肠杆菌表达增强了 IPU 降解,为生物修复技术提供了潜力.

科学领域:

环境微生物学环境微生物学
生物技术是生物技术.
生物修复是一种生物修复.

背景情况:

像异氨酸 (IPU) 这样的氨酸除草剂是持续的环境污染物.
从土壤和水中去除IPU的有效方法至关重要.

研究的目的:

为了识别能够降解IPU的土壤细菌.
调查IPU生物降解的遗传基础和效率.
探索生物修复技术开发的潜力.

主要方法:

隔离和识别IPU降解的细菌 (Pseudomonas putida,Acinetobacter johnsonii). 这些细菌的分离和识别.
在大肠杆菌中克隆和表达catechol 1,2-dioxygenase (catA) 基因.
高性能液体色谱 (HPLC) 用于降解分析.
定量聚合酶连锁反应 (qPCR) 用于基因表达分析.
水友互动液态染色学 (HILIC) 质谱仪用于代谢物识别.

主要成果:

鉴定出 Pseudomonas putida 和 Acinetobacter johnsonii 是有效的 IPU 降解剂.
在15天后,表达catA基因的工程大肠杆菌显示IPU降解率 (44.80%) 比P. putida (21.60%) 高.
qPCR证实了IPU暴露时catA基因表达的增加.
确定了三种中间代谢物 (MDIPU,4-IA,DDIPU).
对两种细菌菌株都观察到IPU诱导的catA活性和对杂草生长的影响.

结论:

伪虫和工程化大肠杆菌有效地代谢异素.
catA基因在IPU生物降解中发挥着重要作用.
这些发现支持对氨酸除草剂的生物修复和生物降解技术的开发.

关键词:

生物降解生物降解卡特科尔1,2-二氧化基酶.这是一种异质氨酸 (Isoproturon).伪omonas putida可以使用.catA 基因基因基因 qPCRR 是一个很好的方法.

更多相关视频

Anaerobic Protein Purification and Kinetic Analysis via Oxygen Electrode for Studying DesB Dioxygenase Activity and Inhibition

Anaerobic Protein Purification and Kinetic Analysis via Oxygen Electrode for Studying DesB Dioxygenase Activity and Inhibition

Published on: October 3, 2018

Isolation, Propagation, and Identification of Bacterial Species with Hydrocarbon Metabolizing Properties from Aquatic Habitats

Isolation, Propagation, and Identification of Bacterial Species with Hydrocarbon Metabolizing Properties from Aquatic Habitats

Published on: December 7, 2021

相关概念视频

Bioremediation

Bioremediation

Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.

Gene Regulation in Microbial Communities: Quorum Sensing

Gene Regulation in Microbial Communities: Quorum Sensing

Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...