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Direct Itaconate Production from Brown Macroalgae Using Engineered Vibrio sp. dhg.

Jo Hyun Moon1, Sunghwa Woo1, Hyo Jeong Shin1

  • 1Department of Chemical Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Korea.

Journal of Agricultural and Food Chemistry
|July 20, 2024
PubMed
Summary
This summary is machine-generated.

This study demonstrates direct itaconate production from brown macroalgae using engineered Vibrio sp. dhg. The engineered strain achieved significant itaconate titers, highlighting algae as a sustainable feedstock for chemical bioproduction.

Keywords:
Saccharina japonicabioprocessingbiorefinerybrown macroalgaeitaconate

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Area of Science:

  • Biotechnology
  • Synthetic Biology
  • Sustainable Chemistry

Background:

  • Itaconate is a valuable platform chemical, but its production is limited by crop-based feedstock availability.
  • Brown macroalgae offer a sustainable, high-yield alternative biomass source for industrial applications.
  • Vibrio sp. dhg is an emerging platform for efficient brown macroalgal biorefineries.

Purpose of the Study:

  • To demonstrate direct itaconate production from brown macroalgae.
  • To engineer Vibrio sp. dhg for enhanced itaconate biosynthesis using macroalgal substrates.
  • To evaluate the potential of macroalgae as a feedstock for itaconate bioproduction.

Main Methods:

  • Engineered Vibrio sp. dhg strain VIC was developed.
  • Heterologous expression of cis-aconitate decarboxylase (Cad) from Aspergillus terreus.
  • Deletion of isocitrate dehydrogenase (icd) gene in Vibrio sp. dhg.

Main Results:

  • VIC strain achieved itaconate titers of 2.5 g/L from alginate and mannitol mixture.
  • VIC strain produced 1.5 g/L itaconate from 40 g/L raw Saccharina japonica.
  • Demonstrated feasibility of direct itaconate production from raw macroalgae.

Conclusions:

  • Brown macroalgae are a viable and sustainable feedstock for itaconate bioproduction.
  • Engineered Vibrio sp. dhg serves as an effective platform for macroalgal biorefining.
  • This study advances the development of bio-based itaconate production processes.