相关实验视频

Updated: Jun 15, 2025

Methanol Independent Expression by Pichia Pastoris Employing De-repression Technologies

Methanol Independent Expression by Pichia Pastoris Employing De-repression Technologies

Published on: January 23, 2019

过度表达原生碳酸无水酶增加了甲类生物催化剂中碳转化效率Methylococcus capsulatus浴

Spencer A Lee¹, Jessica M Henard¹, Robyn A C Alba¹

¹BioDiscovery Institute and Department of Biological Sciences, University of North Texas, Denton, Texas, USA.

|August 27, 2024

概括

像Methylococcus capsulatus这样的甲性细菌使用甲和CO2. 这项研究揭示了二氧化碳使用的关键是二氧化碳无水体,这导致了一种具有2.5倍改进的甲转化为生物质的工程菌株,用于生物技术.

科学领域:

微生物的新陈代谢
生物地化学碳循环的过程
生物技术是生物技术.

背景情况:

甲型细菌利用甲 (CH4) 作为碳和能源来源,在碳循环中发挥着至关重要的作用.
一些甲类植物,如Methylococcus capsulatus,也可以同化二氧化碳 (CO2),表明双一碳代谢.
了解这种双重新陈代谢对于改善用于温室气体捕获和生物技术应用的甲类植物至关重要.

研究的目的:

为了研究碳炭化酶 (CA) 异型在Methylococcus capsulatus无机碳代谢中的作用.
阐明CA对二氧化碳同化和甲类动物生长的贡献.
为生物技术目的设计一种具有增强碳转化效率的甲类菌株.

主要方法:

在M. capsulatus中鉴定和表征了五种碳酸酶 (CA) 异型 (一种α-CA,一种γ-CA,三种β-CA).
生成CA无突变菌株,以评估它们的代谢和生理作用.
在不同的二氧化碳条件下分析基因表达,并对CA异型进行过度表达研究.
开发了一种过度表达特定CA异型的工程菌株,以改善甲生物催化剂.

主要成果:

囊菌表达了五种参与二氧化碳代谢和生长的CA异型.
CA异型具有差异表达,并由二氧化碳限制诱导,零突变体显示生长受损.
某些CA异型的过度表达增强了生长动力学,并减少了CH4利用文化的CO2演变.
一种过度表达α-CA和β-CA的工程菌株显示,CH4转化为生物质的转化率提高了2.5倍.

结论:

碳酸无水酸在M. capsulatus的无机碳代谢和二氧化碳同化中发挥着关键的,非冗余的作用.
工程CA表达可以显著提高甲类植物中的碳转化效率.
开发的工程菌株为以甲托为基础的生物工艺提供了更好的产量,有可能降低单细胞蛋白质生产等应用的成本.

关键词:

C1代谢过程中的代谢二氧化碳是二氧化碳的一种物质.碳酸无水酶是一种碳酸无水酶.温室气体的温室气体是什么甲是一种甲.作为一个甲类植物.

更多相关视频

A Toolkit to Enable Hydrocarbon Conversion in Aqueous Environments

A Toolkit to Enable Hydrocarbon Conversion in Aqueous Environments

Published on: October 2, 2012

Author Spotlight: Designing Simple and Inexpensive Techniques to Grow Methane-Oxidizing Bacteria in the Laboratory

Author Spotlight: Designing Simple and Inexpensive Techniques to Grow Methane-Oxidizing Bacteria in the Laboratory

Published on: September 6, 2024

相关概念视频

The Calvin Benson Cycle

The Calvin Benson Cycle

Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...

C4 Pathway and CAM

C4 Pathway and CAM

Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
C4 Pathway
The C4 pathway is used by plants such as...

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.

Adaptations that Reduce Water Loss

Adaptations that Reduce Water Loss

Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.