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Carbon-dioxide Fixation01:28

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Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
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Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon 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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Related Experiment Video

Updated: Jul 16, 2025

Coupling Carbon Capture from a Power Plant with Semi-automated Open Raceway Ponds for Microalgae Cultivation
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[Artificial bioconversion of carbon dioxide].

Tao Cai1,2, Yuwan Liu1,2, Leilei Zhu1,2

  • 1Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China.

Sheng Wu Gong Cheng Xue Bao = Chinese Journal of Biotechnology
|September 12, 2023
PubMed
Summary
This summary is machine-generated.

Artificial bioconversion of carbon dioxide (CO2) offers a sustainable solution, overcoming limitations of natural and physical-chemical methods. Researchers achieved artificial starch synthesis from CO2, paving the way for carbon neutrality.

Keywords:
artificial synthesis of starchbioconversioncarbon dioxidecarbon peaking and carbon neutrality goalsresourceization

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Area of Science:

  • Biotechnology
  • Synthetic Biology
  • Biochemical Engineering

Context:

  • Global sustainable development faces challenges in carbon dioxide (CO2) utilization.
  • Biological carbon fixation is inefficient and slow for commercialization.
  • Physical-chemical methods are energy-intensive and produce by-products.

Purpose:

  • To review progress in artificial bioconversion of CO2.
  • To highlight advancements in designing biological systems for CO2 fixation.
  • To explore future directions for efficient CO2 utilization.

Summary:

  • Summarizes a decade of research at Tianjin Institute of Industrial Biotechnology on artificial CO2 bioconversion.
  • Details the design and construction of functional parts, pathways, and systems for CO2 fixation.
  • Reports a breakthrough in the artificial synthesis of starch directly from CO2.

Impact:

  • Provides new insights for achieving carbon peaking and carbon neutrality goals.
  • Advances the field of synthetic biology for sustainable CO2 management.
  • Offers potential for industrial applications in carbon capture and utilization.