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The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...
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Strain improvement is a foundational strategy in industrial microbiology aimed at maximizing microbial productivity, particularly because natural isolates typically yield commercially valuable products in very low concentrations. Although optimizing the culture medium and environmental conditions can improve yields, these adjustments are inherently limited by the organism’s genetic potential. As a result, the focus shifts toward genetic modifications to enhance biosynthetic capacity. The...
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Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...
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Metabolic Engineering of Microalgae for Biofuel Production.

Mohammad Pooya Naghshbandi1, Meisam Tabatabaei2, Mortaza Aghbashlo3

  • 1Department of Microbial Biotechnology, School of Biology, College of Science, University of Tehran, Tehran, Iran.

Methods in Molecular Biology (Clifton, N.J.)
|April 30, 2026
PubMed
Summary
This summary is machine-generated.

Microalgae can produce biofuels like bioethanol and biodiesel using sunlight and CO2. Metabolic engineering offers a promising strategy to overcome economic challenges and enhance biofuel production from these microorganisms.

Keywords:
BiodieselBiohydrogenGenetic engineeringMetabolic engineeringMicroalgae

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Area of Science:

  • Biotechnology
  • Renewable Energy
  • Microbiology

Background:

  • Microalgae are efficient cell factories for biofuel production (bioethanol, biodiesel, biohydrogen) using CO2 and sunlight.
  • Commercialization of microalgal biofuels faces economic hurdles.
  • Metabolic engineering presents a key strategy to address these economic limitations.

Purpose of the Study:

  • To review metabolic pathways for lipid and hydrogen production in microalgae.
  • To discuss metabolic and genetic engineering approaches for enhancing lipid and biohydrogen synthesis.
  • To detail genetic engineering tools and protocols for reconstructing microalgal metabolic pathways.

Main Methods:

  • Review of metabolic pathways involved in microalgal biofuel production.
  • Analysis of metabolic and genetic engineering strategies.
  • Description of genetic engineering tools and protocols.

Main Results:

  • Identification of key metabolic pathways for lipid and hydrogen production.
  • Presentation of engineering approaches to improve production rates.
  • Detailed explanation of genetic engineering techniques and reconstruction protocols.

Conclusions:

  • Metabolic engineering is crucial for advancing microalgal biofuel viability.
  • Genetic engineering tools provide a framework for optimizing microalgal biofuel production.
  • The presented protocols can guide metabolic pathway reconstruction for enhanced biofuel synthesis.