CD Biosynsis offers specialized Chlamydomonas reinhardtii CRISPR-Cas9 Genome Editing Services, providing precise genetic modification for this premier model photosynthetic organism. Chlamydomonas reinhardtii, often referred to as the green yeast, is a cornerstone of research in photosynthesis, flagellar motility, and carbon concentrating mechanisms (CCM). Our services utilize advanced CRISPR-Cas9 platforms specifically optimized for the high GC-content and complex silencing mechanisms of the Chlamydomonas genome. We provide efficient Gene Knockout (KO), Gene Knock-in (KI), and specific point mutations to accelerate functional genomic studies and the development of algal strains for biofuel production and recombinant protein expression.
Get a QuoteChlamydomonas reinhardtii presents unique challenges for genome editing, including a high GC-content (approx. 64%) and efficient endogenous gene silencing. Our integrated CRISPR platform overcomes these hurdles by utilizing optimized Ribonucleoprotein (RNP) delivery and specialized heat-shock treatments to enhance editing efficiency. By delivering the Cas9-gRNA complex directly, we bypass the need for sustained transgene expression, significantly reducing the risk of silencing and off-target effects. Whether targeting the nuclear or chloroplast genome, our service provides the precision needed to dissect complex algal biology and engineer robust metabolic pathways.
RNP Delivery Platform
Direct delivery of Cas9 protein and gRNA complexes to ensure rapid, transient editing activity, avoiding the complications of DNA integration and gene silencing.
Cpf1 (Cas12a) Systems
Alternative nucleases utilizing T-rich PAM sites, expanding the targetable range in regions of the algal genome where Cas9 PAM sites are scarce.
Optimized gRNA Design
Bioinformatic selection of gRNAs with high GC-compatibility and minimal predicted off-target activity in the Chlamydomonas reference genome.
Gene Knockout (KO)
Permanent disruption of target genes via NHEJ-mediated indels, essential for studying flagellar assembly or metabolic regulation.
Gene Knock-in (KI)
Site-specific integration of reporter genes or metabolic cassettes via HDR, providing stable expression in nuclear safe harbors.
Point Mutation
Introduction of precise nucleotide substitutions to analyze specific protein domains or enzyme active sites in photosynthetic complexes.
Photosynthesis Research
Disruption of light-harvesting complex genes or photosystem components to study electron transport and light acclimation.
Biofuel Strain Engineering
Optimization of lipid biosynthesis pathways by knocking out starch synthesis genes to redirect carbon flux toward triacylglycerols (TAGs).
Flagellar & Ciliary Biology
Precise editing of dynein arms or intraflagellar transport (IFT) components to model human ciliopathies in a robust algal system.
A rigorous pipeline designed for efficient editing and verified clonal isolation.
1. Design & RNP Assembly
2. Transformation & Enrichment
3. Clonal Screening
4. Verification & Delivery
Target identification and gRNA design optimized for algal GC-content. Synthesis of gRNAs and preparation of high-purity Cas9 protein.
Assembly of RNP complexes in vitro and design of screening primers.
Transformation of Chlamydomonas cells via electroporation or glass bead methods. Use of temporary heat-shock to boost efficiency.
Short-term antibiotic recovery or fluorescent co-selection to enrich for the successfully edited cell population.
Genotype verification via Sanger or Deep Sequencing to confirm the precise genetic modification.
Functional validation (e.g., chlorophyll fluorescence, lipid analysis) as required by project goals.
Delivery of verified algal clones and detailed project documentation.
Overcoming Gene Silencing
Use of DNA-free RNP delivery prevents the transcriptional and post-transcriptional silencing mechanisms that often plague traditional plasmid-based methods.
GC-Rich Optimization
Specialized gRNA selection and nuclease variants tailored for the unique 64 percent GC-content of the Chlamydomonas nuclear genome.
Precision Safe Harbor KI
Expertise in targeting characterized safe harbor loci to ensure stable, high-level expression of exogenous transgenes without interfering with native growth.
Comprehensive Verification
Rigorous genotyping and phenotypic validation ensuring the delivered strain performs reliably in subsequent photosynthetic or industrial assays.
1. Why is RNP delivery preferred for Chlamydomonas?
Chlamydomonas has very efficient mechanisms for silencing foreign DNA. By delivering pre-assembled RNP complexes, the Cas9 activity is transient, which minimizes the risk of silencing and limits off-target mutations.
2. Can you perform editing in the chloroplast genome?
Yes. While nuclear editing is standard, we also offer specialized chloroplast transformation and editing services to modify photosynthetic machinery directly.
3. What is the typical turnaround time for a knockout strain?
Due to the slower growth rate of algae compared to bacteria and the need for thorough screening, a typical Chlamydomonas project takes 12 to 16 weeks from design to delivery.
4. How do you handle the high GC-content of the genome?
We use specific bioinformatic tools to predict gRNA secondary structures and off-targets in GC-rich environments, and we utilize Cas9 variants that maintain high activity in these regions.
5. Is antibiotic selection used for CRISPR clones?
We often use co-transformation with an antibiotic resistance marker to enrich for the population that took up the RNP complexes, followed by PCR screening to identify those with the specific edit.
6. Can you target multiple genes simultaneously?
Yes. Multiplexing is possible by delivering multiple RNPs. This is particularly useful for redundant gene families in metabolic pathways.
7. Do you provide help with gRNA design?
Yes, all our services include expert design and validation of gRNAs to maximize the probability of success for your specific target locus.
8. What documentation is provided with the final strain?
You will receive a comprehensive report containing gRNA sequences, sequencing confirmation of the edit, and a description of the screening and selection process used.
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.