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Updated: Jul 15, 2025

Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1

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Published on: April 16, 2018

通过Shewanella oneidensis结合稀土的基因组特征

Sean Medin¹, Alexa M Schmitz¹, Brooke Pian¹

¹Department of Biological and Environmental Engineering, Cornell University, Cornell University, 228 Riley-Robb Hall, Ithaca, NY, 14853, USA.

Scientific reports

|September 25, 2023

概括

谢瓦内拉 (Shewanella oneidensis) MR-1的基因工程增强了稀土元素 (REE) 的生物吸收. 破坏特定的基因,如SO_4685,显著提高了REE捕获,为传统的分离方法提供了可持续的替代方案.

科学领域:

生物技术是生物技术.
环境科学环境科学
微生物学微生物学

背景情况:

稀土元素 (REEs) 对可持续能源技术至关重要.
目前的REE分离方法,如溶剂提取,对环境有害.
使用微生物的生物吸收为REE分离提供了一个更绿色的替代方案.

研究的目的:

在Shewanella oneidensisMR-1中识别影响REE生物吸收的基因.
探索改进REE分离效率的基因工程目标.
了解S. oneidensis.中REE生物吸收的遗传基础.

主要方法:

选了3,373种S. oneidensis MR-1的全基因组淘汰突变体.
使用高通量屏幕测量欧 (Eu) 生物吸收变化.
在混合溶液中经过验证的REE (La,Eu,Yb) 生物吸收,使用诱导合等离子体质谱法 (ICP-MS).

主要成果:

确定了130个增加生物吸收的基因和112个减少生物吸收的基因.
干扰SO_4685 (囊多糖合成) 增加了高达79%的生物吸收.
干扰nusA降低了高达35%的生物吸收.
确定了影响REE生物吸收的关键基因本体和操作子,包括弧形系统和多糖生物合成基因.

结论:

在S.oneidensis的遗传修饰可以显著增强REE生物吸收.
特定的基因标,如SO_4685和nusA,提供了改善REE分离的潜力.
这项研究为基因工程微生物提供了基础,以实现更高效和可持续的REE回收.

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