CD Biosynsis offers high-precision Synechococcus spp. Gene Knockout Services, providing a streamlined platform for the functional analysis and metabolic engineering of these pivotal marine and freshwater cyanobacteria. Species such as S. elongatus PCC 7942 and S. sp. PCC 7002 are essential models for photosynthesis, circadian rhythms, and carbon capture. Our platform addresses the unique biological challenges of Synechococcus, particularly its polyploidy—where multiple copies of the chromosome are present in a single cell—ensuring the rapid generation of homozygous mutants through accelerated segregation techniques.
Our service utilizes advanced CRISPR-Cas9 and Cas12a (Cpf1) technologies specifically optimized for the cyanobacterial cellular environment. By employing tightly regulated inducible promoters and codon-optimized nucleases, we overcome the common issue of Cas-mediated toxicity in Synechococcus. Whether you are looking to eliminate competitive metabolic sinks like glycogen synthesis to redirect carbon toward biofuels, or investigating fundamental genes involved in the phycobilisome light-harvesting complex, our end-to-end solutions provide the technical expertise and genomic verification required to deliver fully segregated, homozygous knockout strains.
Get a QuoteA primary bottleneck in Synechococcus gene disruption is the requirement for "segregation." Because these organisms contain multiple copies of their genome, a traditional knockout via homologous recombination (HR) initially produces a "merodiploid" or heterozygous state. Our CRISPR-based platform solves this by utilizing the nuclease to provide active selective pressure against wild-type chromosomal copies, forcing the cell to maintain only the edited alleles. This significantly reduces the time required for full segregation from months to just a few weeks.
We provide both integrative and replicative knockout systems. Our integrative approach utilizes homologous recombination to replace the target gene with a selection marker or a "scarless" cassette, while our replicative systems utilize transient expression of CRISPR machinery to induce site-specific indels via native repair mechanisms. By targeting the coding sequence (CDS) or essential promoter regions, we ensure a complete loss-of-function phenotype, allowing for high-fidelity metabolic flux studies and the construction of optimized photosynthetic chassis.
We provide a range of knockout configurations tailored to the specific genetic stability and regulatory needs of your project.
HR-Mediated
Standard replacement of a target gene with an antibiotic resistance marker (e.g., Kanamycin, Spectinomycin) via double crossover, ensuring high stability.
Stability
Ideal for long-term physiological studies where constant selective pressure is required to maintain the mutant genotype in industrial settings.
Counter-Selection
Utilizing CRISPR or counter-selectable markers (like sacB) to excise the selection cassette after modification, leaving a "clean" genomic sequence.
Industrial Compliance
Highly recommended for strains intended for environmental carbon capture or commercial biomanufacturing where marker-free status is preferred.
Simultaneous Editing
Targeting multiple redundant genes or competitive metabolic branches (e.g., knocking out glycogen synthase and lactate dehydrogenase) in a single workflow.
Cas12a Arrays
Leveraging the RNA-processing capability of Cas12a to express multiple gRNAs from a single array for complex pathway engineering.
Our systematic workflow ensures high-efficiency transformation and definitive verification of homozygous status.
1. Computational Design
2. Build & Preparation
3. Transformation & Segregation
4. Verification & Delivery
Selection of target gene and bioinformatic design of gRNAs. Codon optimization of the Cas nuclease for Synechococcus and design of homology arms for precise deletion.
Synthesis of CRISPR vectors (integrative or replicative). For scarless projects, synthesis of donor templates for clean repair. Preparation of competent cells or conjugation partners.
Genotyping: Confirmation of full segregation and site-specific deletion via PCR and Sanger sequencing. Physiological Validation: Growth analysis and metabolic characterization. Delivery of cryopreserved strains.
Rapid Development
By leveraging CRISPR selective pressure, we reduce the time required to reach homozygous status in polyploid Synechococcus strains by up to 70%.
Minimal Toxicity
We utilize inducible and low-leakage promoters to control Cas expression, ensuring high survival rates and efficient editing without compromising host fitness.
Scarless Flexibility
Advanced marker-excision protocols allow for the construction of multi-gene mutants without the limitations of antibiotic selection availability.
Industrial Stability
Rigorous verification of the mutant genotype across passages ensures that our delivered strains are stable for large-scale production cycles.
Technical insights for your Synechococcus gene knockout project.
Contact Us1. Why is CRISPR better than standard homologous recombination for Synechococcus?
Standard HR in polyploid cyanobacteria requires many rounds of sub-culturing under antibiotic pressure to achieve full segregation. CRISPR nucleases actively kill wild-type genome copies, making segregation much faster and more definitive.
2. Which strains of Synechococcus do you support?
We have established protocols for S. elongatus PCC 7942, Synechococcus sp. PCC 7002, and can optimize our methods for other marine or freshwater isolates upon request.
3. How do you handle the toxicity of Cas9 in cyanobacteria?
We utilize inducible promoters (e.g., L-rhamnose or IPTG-inducible) to control Cas9 expression and often use Cas12a (Cpf1), which is frequently better tolerated by Synechococcus cells.
4. Can you create "scarless" or marker-free knockout strains?
Yes, we offer specialized protocols to remove selection markers or use transient CRISPR systems that leave no foreign DNA behind, ideal for industrial regulatory compliance.
5. How do you confirm that all copies of the chromosome are edited?
We perform "segregation PCR" using primers that flank the target site. A homozygous mutant will show a single band of the edited size, while a heterozygous mutant will still show a wild-type band.
6. Can you knockout multiple genes at once?
Yes, our multiplexed CRISPR platform can target multiple loci simultaneously, which is essential for redirecting carbon flux or knocking out redundant gene families.
7. What transformation methods do you use?
Depending on the strain, we utilize natural transformation (for PCC 7942), triparental conjugation (for PCC 7002), or high-efficiency electroporation.
8. What is the typical turnaround time for a knockout strain?
A standard single-gene knockout project from design to homozygous strain delivery typically takes 10 to 14 weeks.
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.
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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.