Enhanced production of recombinant Staphylococcus simulans lysostaphin using medium engineering

Area of Science:

• Biotechnology
• Microbiology
• Enzyme Engineering

Background:

• Multidrug resistance in *Staphylococcus aureus* poses significant health risks.
• Lysostaphin, a peptidoglycan hydrolase from *Staphylococcus simulans*, shows potent activity against staphylococcal species.
• High production costs currently limit the clinical application of lysostaphin.

Purpose of the Study:

• To enhance the production yield of recombinant lysostaphin in *E. coli*.
• To develop cost-effective strategies for lysostaphin manufacturing.
• To optimize conditions for high-level active lysostaphin expression.

Main Methods:

• Medium engineering and optimization techniques were applied.
• An inducible *araBAD* promoter system was utilized for controlled gene expression.
• Recombinant lysostaphin production was evaluated in *E. coli* under various conditions, including temperature and media composition.

Main Results:

• A 5-fold enhancement in lysostaphin production was achieved through optimized autoinduction media.
• The highest yield of active lysostaphin was obtained at 30°C.
• The production cost for 1000 U of lysostaphin was reduced fourfold compared to previous methods.

Conclusions:

• Medium engineering and a novel promoter system significantly improve recombinant lysostaphin production in *E. coli*.
• The developed method offers a cost-effective approach for large-scale lysostaphin manufacturing.
• This study presents a promising bench-scale procedure with potential for efficient industrial fermentation of lysostaphin.