CD Biosynsis offers advanced Saccharomyces cerevisiae CRISPR-Cas9 Genome Editing Services, providing precise and efficient genetic manipulation in this premier eukaryotic chassis. S. cerevisiae (baker's yeast) is the workhorse of industrial biotechnology, widely used for producing fuels, chemicals, and pharmaceuticals. Our services leverage the power of CRISPR-Cas9 and the yeast's natural high efficiency of Homology-Directed Repair (HDR) to achieve clean gene knockouts, accurate gene replacements, and stable integration of large biosynthetic pathways. We provide end-to-end solutions, from rational target design and gRNA optimization to multi-gene editing and final strain verification, accelerating strain development for enhanced product yield, tolerance, and novel pathway construction.
Get a QuoteThe success of CRISPR-Cas9 editing in S. cerevisiae relies heavily on its robust and high-fidelity HDR mechanism, which efficiently uses provided repair templates to accurately mend the double-strand break (DSB) induced by Cas9. This minimizes random indels and maximizes the chance of achieving precise knock-ins and replacements. Our platform is optimized for multiplex editing, allowing the simultaneous targeting of multiple genes or the construction of entire biosynthetic pathways in a single step. This capability is essential for complex metabolic engineering projects that demand fast, clean, and stable genomic modifications in the yeast chassis.
Cas9 Expression Cassettes
Stable or inducible expression of the Cas9 enzyme, optimized for yeast nuclear localization and minimal off-target activity.
Multiplex gRNA Assembly
Construction of polycistronic gRNA arrays for the simultaneous targeting of multiple genomic loci (e.g., up to 5 genes in one step).
Repair Template Design
Design of donor DNA templates (linear or circular) with optimized homology arms (up to 100 bp) to maximize HDR efficiency for large insertions.
Gene Knockout (KO)
Clean and permanent deletion of target genes (e.g., competing native metabolic enzymes) via NHEJ or markerless HDR-mediated removal.
Targeted Gene Knock-in
Accurate insertion of large fragments, such as synthetic operons or heterologous pathways, into specified genomic safe harbor loci.
Promoter Swap & Tuning
Replacement of native promoter sequences with inducible, constitutive, or synthetic promoters to modulate gene expression strength and timing.
Pathway Assembly & Optimization
Integration of multi-enzyme pathways (e.g., isoprenoid, polyketide) into the genome to achieve high-yield production of target molecules.
Tolerance Engineering
Modification of genes related to stress response, cell wall integrity, or membrane transport to improve tolerance to solvents, acids, or high temperature.
Feedstock Utilization
Engineering the yeast to efficiently utilize non-traditional sugars (e.g., xylose, arabinose) or low-cost feedstocks from lignocellulosic biomass.
A systematic process for design, editing, and stable integration in yeast.
1. Rational Target Design
2. CRISPR-Cas9 System Construction
3. Transformation and Selection
4. Verification and Stabilization
Identify target locus for knockout, replacement, or insertion based on metabolic analysis.
Design gRNA(s) for high on-target specificity and the repair template(s) with optimized homology arms.
Select the appropriate Cas9 delivery method (plasmid or stable integration).
Construct the gRNA expression cassette (often multiplexed) and the repair template DNA.
Introduce the Cas9 system and repair template DNA into the S. cerevisiae host strain.
Utilize optimized transformation methods (e.g., electroporation or LiAc/PEG).
Genotype verification via PCR and Sanger sequencing of the edited locus to confirm clean edit.
Phenotypic validation (e.g., product titer, growth rate) of the final engineered strain.
Delivery of the verified, markerless S. cerevisiae strain and complete documentation.
High HDR Efficiency
Leveraging yeast's robust natural Homology-Directed Repair (HDR) system, we achieve high efficiencies for accurate gene replacement and large pathway knock-ins, minimizing random indels.
Multiplex Editing Capability
Optimized systems allow the simultaneous targeting and editing of multiple genes (multiplexing) in a single transformation step, significantly accelerating complex pathway assembly.
Stable Chromosomal Integration
We prioritize the integration of engineered pathways directly into the chromosome, ensuring high expression stability and preventing plasmid loss, which is essential for industrial scale-up.
Markerless Strain Development
Protocols are designed to remove all temporary selection markers, resulting in clean, non-GMO-like strains suitable for regulatory approval and large-scale fermentation.
1. Why is yeast (S. cerevisiae) a good host for CRISPR-Cas9?
Yeast's highly active and efficient Homology-Directed Repair (HDR) pathway is its primary advantage. After Cas9 creates a double-strand break, the cell reliably uses the supplied repair template to integrate new DNA precisely, leading to high editing accuracy.
2. What is the maximum size of DNA you can integrate using CRISPR-Cas9?
While size is limited by the transformation process, S. cerevisiae is capable of integrating very large fragments (e.g., 10-50 kb or more) in a single step using the CRISPR-HDR mechanism, making it excellent for entire pathway integration.
3. Do you offer editing services for non-conventional yeasts?
Yes, while S. cerevisiae is our primary host, we also offer optimized CRISPR systems for other industrial yeasts such as Pichia pastoris, Yarrowia lipolytica, and Kluyveromyces lactis, adapting the protocols for their specific repair mechanisms.
4. How do you ensure the final engineered strain is markerless?
We use specific marker recycling techniques (e.g., based on the Cre-LoxP system) or use self-excising markers, ensuring that the temporary selection marker is completely removed from the genome after the successful edit is confirmed.
5. Can you perform multiple gene knockouts simultaneously?
Yes. By expressing multiple guide RNAs from a single cassette, we can target and delete several genes (or integrate multiple fragments) in a single transformation round, significantly speeding up complex metabolic engineering.
6. Is the Cas9 enzyme delivered via plasmid or integrated into the genome?
We offer both options. For one-time edits, a transient plasmid is often used and then cured. For highly complex, sequential editing projects, we often integrate a constitutive Cas9 gene for maximum editing readiness and stability.
7. How is the edited strain verified upon project completion?
We provide full verification via PCR and Sanger sequencing across the edited genomic locus to confirm the exact base pair change or insertion. Functional verification (phenotype) is also conducted upon request.
8. What is the role of the repair template in CRISPR editing?
The repair template is the donor DNA provided to the cell. After Cas9 cleaves the DNA, the yeast's HDR machinery uses the template as a blueprint to accurately insert, delete, or replace the sequence, making the repair template design critical for precise editing.
CRISPR-Cas9 technology represents a transformative advancement in gene editing techniques. The main function of the system is to precisely cut DNA sequences by combining guide RNA (gRNA) with the Cas9 protein. This technology became a mainstream genome editing tool quickly after its 2012 introduction because of its efficient, simple and low-cost nature.
The CRISPR gene editing system with its Cas9 version stands as a vital instrument for current biological research. CRISPR technology enables gene knockout (KO) through permanent gene expression blockage achieved by sequence disruption. Various scientific domains including disease modeling and drug screening employ this technology to study gene functions. CRISPR KO technology demonstrates high efficiency and precision but requires confirmation and verification post-implementation because unsatisfactory editing may produce off-target effects or incomplete gene knockouts which impact experimental result reliability. For precise and efficient Gene Editing Services - CD Biosynsis, Biosynsis offers comprehensive solutions tailored to your research needs.
The CRISPR-Cas9 knockout cell line was developed using CRISPR/Cas9 gene editing to allow scientists to remove genes accurately for research on gene function and disease models and pharmaceutical discovery. Genetic research considers this technology essential due to its high efficiency together with simple operation and broad usability.
If your question is not addressed through these resources, you can fill out the online form below and we will answer your question as soon as possible.
CD Biosynsis is a leading customer-focused biotechnology company dedicated to providing high-quality products, comprehensive service packages, and tailored solutions to support and facilitate the applications of synthetic biology in a wide range of areas.