Speeding up enzyme reactions in microbes using light, Pg12

Key Highlights:

• Scientists are exploring photocatalysis, using light to accelerate enzyme reactions in microbes for drug and chemical production.
• Photobiocatalysis combines light energy with enzyme precision to assemble complex molecular structures.
• Researchers have engineered microbes like Pichia pastoris and Escherichia coli to produce valuable compounds, including anti-cancer drugs and degradable plastics.
• A team at the University of Illinois has engineered E. coli to produce non-natural olefins and reductases from glucose using blue light-activated enzymes.

Detailed Insights:

• Photocatalysis involves using light, including ultraviolet radiation, to initiate chemical reactions, opening possibilities for enzyme engineering and drug discovery.
• Light-activated enzymes convert light energy into chemical action, with light triggering rapid shape changes that activate the enzyme.
• Scientists are repurposing natural enzymes through photobiocatalysis to produce novel medicinal products.
• Researchers are exploring gene transfer from bacteria to plants to discover new paths for drug discovery, leveraging molecules from microbes to produce toxic defense molecules.
• E. coli has been engineered to produce various products, including insulin, cost-effective proteins, pyridine dicarboxylate (a degradable plastic), styrene polymer, and precursors to anti-cancer drugs.
• Combining photobiosynthesis with microbial bioreactors allows for large-scale chemical production, integrating light-driven reactions into cellular metabolism.

Scientific/Technical Concepts Involved:

• Photocatalysis: Using light to initiate and accelerate chemical reactions.
• Enzymes: Biological catalysts that speed up chemical reactions in living organisms.
• Photobiocatalysis: Utilizing light energy and enzymes to produce complex structures.
• Microbial bioreactor: A system using microorganisms to carry out specific chemical transformations.