Metabolic Engineering Services

Bacillus subtilis Metabolic Engineering

Custom strain development and fermentation process optimization for industrial production of enzymes, biochemicals, and recombinant proteins.

Custom strain design and genetic engineering
Metabolic pathway optimization and flux balancing
Fermentation process development and scale-up

Why Bacillus subtilis?

Gram-positive industrial chassis with robust growth, efficient secretion capacity, and well-characterized genetics. Ideal for industrial production of high-value compounds.

Rapid growth on inexpensive substrates
Extensive genetic toolbox for engineering
High secretory capacity for proteins

Gram-Positive Chassis

GRAS Status

Industrial Scalability

Our Approach

End-to-End Metabolic Engineering in Bacillus subtilis

We integrate strain engineering, pathway design, and fermentation development to deliver tailored production strains ready for scale-up.

Strain Engineering & Pathway Optimization

Starting from a wild-type or defined host, we apply rational and combinatorial strategies to redirect metabolic fluxes toward the target compound.

Target pathway design and gene expression optimization
Iterative genome editing and screening
High-throughput screening for improved titers and yields

Fermentation Process Development

We design and evaluate fermentation parameters—medium composition, pH, temperature, feeding strategy—to evaluate productivity and stability.

Shake-flask and fed-batch bioreactor studies
Process parameter optimization (DO, pH, feed profiles)
Scale-up assessment from lab to pilot/manufacturing

Custom Genetic Tool Design

Selection or construction of promoters, ribosome binding sites, and gene deletion/insertion cassettes tailored to the target pathway.

Analytical assessment

HPLC, LC-MS, and appropriate activity assays assess the product; genetic sequencing verifies the engineered construct.

Project-Focused Collaboration

Dedicated scientific lead to align milestones with your timeline; flexible scope adjustments as data emerge.

What You Receive

Deliverables & Supporting Data

All deliverables are documented to support regulatory filing, publication, or internal downstream processing.

Core Deliverables

Engineered Bacillus subtilis strain (glycerol stock and/or lyophilized culture)
Plasmid constructs and sequence-verified genetic maps
Fermentation process parameters and SOPs
Product quantification and purity report (HPLC/LC-MS)

Supporting Documentation

Complete strain engineering history and QC data
Analytical method validation report
Scale-up feasibility assessment
Project report with raw data and analysis

Scope of Work

Customizable Parameters

Projects are defined case-by-case during consultation. The table below lists typical parameters that can be tailored to your specific needs.

Parameter	Typical project scope
Host strain	Wild-type or defined B. subtilis strain (e.g., 168, WB800, or proprietary isolate as provided)
Target molecule	Enzymes, proteins, organic acids, amino acids, biopolymers, or other metabolites
Pathway genes	Provided by customer or sourced from public/available libraries (subject to licensing)
Genetic modifications	Gene deletions, insertions, promoter replacements, and expression cassette integration
Screening method	Selectable markers, fluorescence-based, or product-specific assays; throughput scoped per project
Fermentation scale	Scoped per project after consultation
QC & analytics	HPLC, LC-MS, enzymatic activity, cell density, genetic stability; additional assays scoped per project

How It Works

Typical Engagement Workflow

Our streamlined process moves from consultation to engineered strain and process handoff in five defined stages.

Project Definition

We review your target molecule, production goals, and constraints. Together we select host strain, define acceptance criteria, and establish milestones.

Pathway Design & Construction

Using bioinformatics and synthetic biology tools, we design the metabolic pathway and build genetic constructs for transformation into Bacillus subtilis.

Strain Engineering & Screening

We transform constructs, screen colonies, and iteratively refine gene expression or deletion to evaluate titer, yield, and byproduct profile.

Fermentation Optimization

Shake-flask and bioreactor runs identify optimal medium, pH, temperature, and feeding regimes. Process parameters are documented for scale-up.

Final Characterization & Delivery

The engineered strain and fermentation process are QC-checked. Deliverables include the strain, process SOP, analytical reports, and a final project summary.

Applications

Where Bacillus subtilis Metabolic Engineering Excels

This service supports a broad range of industrial biotechnology applications, from enzyme production to biochemical synthesis.

Industrial Enzyme Production

Engineer B. subtilis for high-yield secretion of proteases, amylases, lipases, cellulases, and other industrial enzymes used in detergents, food processing, and biofuel production.

Secretion pathway optimization for extracellular yield
Promoter and signal peptide engineering
Fed-batch fermentation for commercial scale

Biochemical and Metabolite Synthesis

Evaluate carbon flux toward organic acids, amino acids, vitamins, and biopolymers (e.g., poly-γ-glutamic acid, riboflavin) for food, feed, and pharmaceutical applications.

Pathway balancing and cofactor regeneration
Knockout of competing byproduct pathways
Titer improvement via iterative screening

Recombinant Protein Production

Produce therapeutic and diagnostic proteins, vaccine antigens, and protein-based biomaterials in host strains selected for the intended use, with low endotoxin background; food-use safety status must be assessed for the strain, product, and intended use.

Codon optimization and expression cassette design
Protease-deficient strain selection
Downstream compatibility assessment

FAQs

Frequently Asked Questions

Common questions about project scope, timeline, and deliverables.

We routinely perform gene deletions, insertions, and promoter replacements using homologous recombination and CRISPR-based tools. Multi-gene pathway integration and marker removal are included when scoped. Each modification is sequence-verified and characterized for growth and productivity.
Engineered strains are passaged under non-selective conditions to evaluate genetic stability. Plasmid retention, gene copy number, and product titer are monitored over serial subcultures. Stability data are provided as part of the final QC report.
Yes. We can integrate customer-provided genes, promoters, or pathway cassettes into the B. subtilis chassis. Please discuss any licensing or confidentiality requirements during the project definition stage.
Standard scope includes shake-flask screening and lab bioreactor (scale scoped per project) optimization. Scale-up to pilot (scale scoped per project) or larger is available as a separate scope item. Process parameters are documented to support further scale-up.

Scientific Literature

References

Park SA, Bhatia SK, Park HA, et al. Bacillus subtilis as a robust host for biochemical production utilizing biomass. Critical reviews in biotechnology. 2021;41(6):827-848. View on PubMed
Liu Y, Li J, Du G, et al. Metabolic engineering of Bacillus subtilis fueled by systems biology: Recent advances and future directions. Biotechnology advances. 2017;35(1):20-30. View on PubMed
Sidiq KR, Chow MW, Zhao Z, et al. Alanine metabolism in Bacillus subtilis. Molecular microbiology. 2021;115(4):739-757. View on PubMed
Put H, Gerstmans H, Vande Capelle H, et al. Bacillus subtilis as a host for natural product discovery and engineering of biosynthetic gene clusters. Natural product reports. 2024;41(7):1113-1151. View on PubMed
Angeles DM, Scheffers DJ. The Cell Wall of Bacillus subtilis. Current issues in molecular biology. 2021;41:539-596. View on PubMed

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