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相关概念视频

The Calvin Benson Cycle01:46

The Calvin Benson Cycle

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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...
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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
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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.
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Crop cultivation has a long history in human civilization, with records showing the cultivation of cereal plants beginning at around 8000 BC. This early plant breeding was developed primarily to provide a steady supply of food.
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Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
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Updated: Jul 4, 2025

Evaluation of Photosynthetic Efficiency in Photorespiratory Mutants by Chlorophyll Fluorescence Analysis
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工程鲁比斯科提高CO2利用率

Lei Zhao1,2, Zhen Cai1, Yin Li1

  • 1CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.

Synthetic and systems biotechnology
|January 26, 2024
PubMed
概括
此摘要是机器生成的。

改善碳固定包括修改Ribulose-1,5-bisphosphate碳氧化酶/氧化酶 (Rubisco),这是最丰富的酶. 微生物中的异质表达能够对高性能鲁比斯科突变体进行评估和定向进化,以增强碳捕获.

关键词:
碳固定路径的碳固定路径酶工程是什么?酶工程是什么?微生物微生物的存在工厂的二氧化碳固定装置鲁比斯科 (Rubisco) 是一种葡萄酒.合成生物学 合成生物学

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科学领域:

  • 生物化学 生化学
  • 分子生物学分子生物学
  • 合成生物学 合成生物学

背景情况:

  • 利布-1,5-双酸碳氧化酶/氧化酶 (Rubisco) 对二氧化碳固定和全球生物地化学循环至关重要.
  • 低碳氧化和高氧化酶活性限制了Rubisco在碳固定方面的效率.
  • 鲁比斯科植物的直接修改受到保护和叶绿体转化挑战的阻碍.

研究的目的:

  • 审查目前修改植物鲁比斯科的策略.
  • 为突出鲁比斯科生物发生和异质表达的进步.
  • 探索工程化鲁比斯科在微生物中的碳固定和生物转化潜力.

主要方法:

  • 审查现有的关于Rubisco修改和工程的文献.
  • 讨论伴侣辅助的鲁比斯科生物发生.
  • 对异质表达系统的概述,包括大肠杆菌查.

主要成果:

  • 现在可以在微生物中成功地表达各种Rubisco形式的异质表达.
  • 陪伴者辅助生物发生有助于理解和产生功能性的鲁比斯科.
  • 大肠杆菌的定向进化为高性能鲁比斯科突变提供了一条途径.

结论:

  • 微生物的异质表达和定向进化克服了鲁比斯科修饰的先前局限性.
  • 在微生物中设计的Rubisco可以增强碳固定能力.
  • 这种方法具有改善生物转化过程和碳捕获技术的巨大潜力.