Bacillus subtilis as a robust host for biochemical production utilizing biomass

Area of Science:

• Microbial Biotechnology
• Synthetic Biology
• Biochemical Engineering

Background:

• Bacillus subtilis possesses advantageous growth and bioresource utilization traits, making it suitable for biochemical production.
• Its endogenous metabolic pathways and capacity for heterologous pathway integration establish it as a robust host.
• B. subtilis features an efficient protein secretion system, enabling the production of oligopeptides and functional peptides.

Purpose of the Study:

• To review recent advancements in utilizing Bacillus subtilis-based systems for biomass conversion.
• To highlight the production of diverse biochemicals using engineered B. subtilis.
• To discuss the future prospects of B. subtilis as a host for industrial biochemical synthesis.

Main Methods:

• Review of literature on metabolic engineering and genetic modification of B. subtilis.
• Analysis of B. subtilis's capabilities in producing various classes of biochemicals.
• Evaluation of engineering strategies like gene overexpression and bypass pathway inactivation.

Main Results:

• B. subtilis efficiently produces bioalcohols, bioorganic acids (lactic acid, α-ketoglutaric acid, γ-aminobutyric acid), and biopolymers (poly(γ-glutamic acid), PHA).
• It also synthesizes polysaccharides, monosaccharides (N-acetylglucosamine, xylooligosaccharides, hyaluronic acid), and bioflocculants.
• Metabolic and genetic engineering significantly improve production titers and product selectivity in B. subtilis.

Conclusions:

• Bacillus subtilis is a versatile and highly effective host for the sustainable production of a wide array of valuable biochemicals.
• Engineering strategies continue to enhance the efficiency and scope of biochemical synthesis using B. subtilis.
• Future applications of B. subtilis hold significant promise for biomass conversion and industrial biotechnology.