Efficient biosynthesis of ectoine in engineered Vibrio natriegens

Area of Science:

• Microbiology
• Biotechnology
• Synthetic Biology

Background:

• Ectoine, a compatible solute, provides microbial resistance to extreme environments.
• Its valuable chemical and biomedical properties drive demand for efficient production methods.

Purpose of the Study:

• To engineer a recombinant halophile host for enhanced ectoine biosynthesis.
• To optimize ectoine production using advanced metabolic engineering strategies.

Main Methods:

• Cloned a biosynthetic gene cluster from a natural isolate.
• Utilized T7 promoter for inducible ectoine synthesis in Vibrio natriegens.
• Employed in silico directed evolution and protein language models for enzyme optimization.
• Designed degenerate EctC coding sequences for improved expression.

Main Results:

• Identified ectC as a key gene for ectoine synthesis.
• Achieved a high ectoine titer of 56.47 g/L in 28 hours via fed-batch fermentation.
• Demonstrated successful ectoine biosynthesis in the Vibrio natriegens host.

Conclusions:

• Protein language model-guided enzyme design and codon optimization are powerful tools for biosynthesis pathway engineering.
• Vibrio natriegens is a promising host for ectoine production, advancing microbial biotechnology.