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Production of Organic Acids01:25

Production of Organic Acids

Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...
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Related Experiment Video

Updated: May 31, 2026

Anaerobic Protein Purification and Kinetic Analysis via Oxygen Electrode for Studying DesB Dioxygenase Activity and Inhibition
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Published on: October 3, 2018

Novel multienzyme oxidative biocatalyst for lignin bioprocessing.

Claudia Crestini1, Federica Melone, Raffaele Saladino

  • 1Dipartimento di Scienze e Tecnologie Chimiche, Tor Vergata University, Via della Ricerca Scientifica, Rome 00133, Italy. crestini@stc.uniroma2.it

Bioorganic & Medicinal Chemistry
|July 19, 2011
PubMed
Summary

Researchers developed a novel multienzyme biocatalyst for lignin oxidation. This system enhances enzyme synergy and modifies lignin structure, offering a new pathway for biomass conversion.

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Published on: March 9, 2021

Area of Science:

  • Biocatalysis and Enzyme Engineering
  • Biomass Valorization
  • Polymer Science

Background:

  • Lignin, a complex biopolymer, presents challenges for efficient valorization due to its recalcitrant structure.
  • Oxidative cascade processes offer potential for lignin depolymerization and functionalization.
  • Developing robust and efficient biocatalysts is crucial for sustainable lignin processing.

Purpose of the Study:

  • To design and synthesize a novel multienzyme biocatalyst for lignin oxidation.
  • To investigate the efficiency, specificity, and synergistic effects of co-immobilized enzymes in an oxidative cascade.
  • To elucidate the lignin oxidation pathway and characterize structural modifications in treated lignins.

Main Methods:

  • Co-immobilization of laccase and horseradish peroxidase using cross-linking and polyelectrolyte layer-by-layer (LbL) coating.
  • Application of the LbL-multienzyme system in an oxidative cascade process on lignin.
  • Analysis of lignin structural modifications using Gel Permeation Chromatography (GPC) and quantitative 31P Nuclear Magnetic Resonance (NMR) spectroscopy.

Main Results:

  • Successful design and synthesis of a novel LbL-multienzyme biocatalyst.
  • Demonstration of enzyme synergy and enhanced efficiency in the oxidative cascade process.
  • Characterization of lignin oxidation pathways and significant structural modifications in treated lignins.

Conclusions:

  • The developed LbL-multienzyme system is effective for lignin oxidation, showcasing enzyme synergy.
  • The study provides insights into lignin structural modifications and oxidation pathways.
  • This novel biocatalyst holds promise for advanced biomass valorization strategies.