Bacillus subtilis Gene Editing Services

Multi-Gene Knockout Strain Construction

Custom CRISPR/Cas9-based multi-gene knockout in Bacillus subtilis for metabolic engineering and industrial strain development.

Custom multi-gene knockout design and execution
CRISPR/Cas9-based editing for stable deletions
Delivered purified mutant strains with genotyping

Tailored Knockout Solutions for Bacillus subtilis

We design and deliver engineered B. subtilis strains with precise multi-gene deletions for metabolic pathway optimization and strain improvement.

Number of target genes scoped per project
Sequential or simultaneous editing strategy
Each knockout confirmed by PCR and Sanger sequencing

CRISPR/Cas9 Platform

Gram-Positive Expertise

Industrial Strain Delivery

Our Approach

Precise Multi-Gene Knockout in Bacillus subtilis

Leveraging CRISPR/Cas9 technology for efficient and stable gene deletions in B. subtilis, a key industrial host.

Target Design & Validation

In silico guide RNA design for each target locus, with off-target evaluation using proprietary algorithms. We validate targeting efficiency before proceeding.

Guide RNA design in silico
Off-target prediction
Efficiency validation

Sequential Knockout Strategy

For multi-gene knockouts, we employ a sequential strategy to introduce deletions one by one, with genotyping at each step.

Single deletion per round
Verification before next round
Marker excision if required

Industrial Relevance

B. subtilis is widely used for enzyme and metabolite production, making it a useful chassis for strain engineering; food-use safety status depends on the strain, product, and intended use.

Custom Scale

Projects scoped from single to multiple gene knockouts, up to project-defined number.

Quality Control

Each knockout confirmed by PCR and Sanger sequencing; strain purity verified.

Deliverables

What You Receive

Final engineered strains and supporting documentation.

Strains & Materials

Purified mutant B. subtilis strain(s) (glycerol stock)
Parental wild-type control (when included)
Plasmids used for editing (if applicable)

Data & Reports

Genotyping results (PCR and sequencing for each knockout)
Editing efficiency report
Project summary with methodology details

Service Scope

Customization Parameters

Each project is individually scoped based on target genes and project-scoped attributes assessed analytically.

Parameter	Typical project scope
Number of target genes	Scoped per project, typical range 1–5; larger sets by consultation
Editing modality	Knockout (primary); knock-in/point mutation available on request
Host strain	Wild-type or specified B. subtilis strain (e.g., 168, WB800)
Guide RNA design	Proprietary in silico design; customer may provide approved guides
Off-target analysis	In silico prediction; optional targeted PCR validation
Delivery format	Glycerol stocks, lyophilized cultures, or agar slants as requested

Workflow

How It Works

A streamlined process from project scoping to final strain delivery.

Project Consultation & Gene Target Review

We discuss your target genes, strain background, and project-scoped attributes assessed analytically to define the knockout strategy and timeline.

Guide RNA Design & Plasmid Construction

Bioinformatics design of CRISPR guide RNAs targeting each gene, followed by construction of editing plasmids with Cas9 expression and guide cassettes.

Transformation & Editing

Delivery of editing plasmids into B. subtilis competent cells, selection for editing events, and confirmation of knockout via colony PCR.

Sequential Knockout Rounds

For multi-gene deletions, we repeat the transformation and selection process sequentially, verifying each knockout before proceeding.

Strain Purification & Final Validation

Isolation of single colonies, purification of the final knockout strain, and comprehensive genotyping (PCR and Sanger sequencing) of all target loci.

Applications

Where Multi-Gene Knockout Is Applied

From metabolic engineering to functional genomics.

Pathway Redirection

Redirect metabolic flux by deleting competing pathways to evaluate target product yield.

Deletion of competing pathway genes
Carbon flux redirection
Increased precursor availability

Secretion Improvement

Evaluate heterologous protein secretion by eliminating proteases or cell wall remodeling factors.

Protease gene deletions
Cell wall integrity maintenance
Secretion efficiency improvement

Gene Function Study

Study gene function by systematic knockout of gene clusters or operons.

Gene cluster deletion
Phenotypic characterization
Complementation controls

FAQ

Frequently Asked Questions

Common inquiries about our multi-gene knockout service.

The number of target genes is scoped per project based on genetic context and project goals. We typically handle up to 3–5 sequential knockouts; larger sets can be discussed during consultation. Each round includes assessment, so overall timeline scales with gene count.
Success rates depend on factors such as target locus accessibility and strain background. We achieve reliable editing efficiencies through optimized transformation protocols and guide RNA design. Detailed efficiency data is provided in the project report, and acceptance criteria are defined in the SOW.
In silico off-target prediction is performed for each guide RNA. If requested, we can validate predicted off-target loci by targeted amplicon sequencing. No genome-wide off-target assay is performed as standard; this can be added per project scope.
We can work with common laboratory strains as well as industrial isolates. The transformation efficiency may vary; we will test competence and evaluate protocols for your strain. Please provide strain details during project scoping.

Scientific Literature

References

Gulsoy IC, Saaki TNV, Wenzel M, et al. Minimization of the Bacillus subtilis divisome suggests FtsZ and SepF can form an active Z-ring, and reveals the amino acid transporter BraB as a new cell division influencing factor. PLoS genetics. 2025;21(1):e1011567. View on PubMed
Huang Q, Zhang Z, Liu Q, et al. SpoVG is an important regulator of sporulation and affects biofilm formation by regulating Spo0A transcription in Bacillus cereus 0-9. BMC microbiology. 2021;21(1):172. View on PubMed
Hu A, Fu Y, Ren D, et al. Decoding the regulatory role of AmiC in amicoumacins production through transcriptomics and metabolic profiling in Bacillus subtilis fmb60. World journal of microbiology & biotechnology. 2026;42(1):33. View on PubMed
Hemmerich J, Labib M, Steffens C, et al. Screening of a genome-reduced Corynebacterium glutamicum strain library for improved heterologous cutinase secretion. Microbial biotechnology. 2020;13(6):2020-2031. View on PubMed
Hao W, Suo F, Lin Q, et al. Design and Construction of Portable CRISPR-Cpf1-Mediated Genome Editing in Bacillus subtilis 168 Oriented Toward Multiple Utilities. Frontiers in bioengineering and biotechnology. 2020;8:524676. View on PubMed

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