CD Biosynsis offers expert Phaeodactylum tricornutum Pathway Optimization Services, combining advanced synthetic biology with systems-level metabolic engineering to maximize the productive capacity of this model pennate diatom. Phaeodactylum tricornutum is a powerhouse of marine biotechnology, capable of synthesizing high-value long-chain polyunsaturated fatty acids (LC-PUFAs) such as eicosapentaenoic acid (EPA), as well as complex pigments like fucoxanthin. However, native metabolic flux is often directed toward primary biomass and storage carbohydrates rather than these high-value metabolites. Our service platform identifies and overcomes these metabolic bottlenecks through a rigorous Design-Build-Test-Learn cycle.
Our optimization solutions go beyond single-gene modifications. We apply a holistic approach that integrates nuclear and plastid engineering with predictive computational modeling. By coordinating the expression of multiple enzymes in a biosynthetic route and knocking down competing pathways, we redirect the cell's energetic and carbon resources toward your target molecule. Whether you are aiming to improve biofuel-grade triacylglycerol (TAG) accumulation, "humanize" protein glycosylation, or enhance photosynthetic efficiency under industrial light conditions, our platform provides the genetic precision and analytical depth necessary to deliver high-performance diatom strains.
Get a QuoteOptimizing pathways in Phaeodactylum tricornutum requires addressing its unique evolutionary architecture, including a complex four-membrane chloroplast and a distinct carbon concentrating mechanism (CCM). Our engineering platform utilizes Genome-Scale Metabolic Models (GEMs) to simulate intracellular flux and predict the impact of specific genetic interventions. This in silico modeling allows us to prioritize targets that maximize the "Titer, Rate, and Yield" (TRY) of target metabolites while minimizing the metabolic burden on the host cell.
A critical component of our strategy is the fine-tuning of regulatory elements. We utilize a library of validated diatom-specific promoters, terminators, and signal peptides to ensure that each enzyme in a pathway is expressed at the optimal level and localized to the correct subcellular compartment (e.g., the chloroplast stroma, the endoplasmic reticulum, or the pyrenoid). By integrating multi-omics data—transcriptomics and lipidomics—we refine these models iteratively, ensuring that the engineered diatom chassis performs reliably in large-scale photobioreactors.
We provide a diversified toolkit of genetic strategies to achieve peak metabolic performance in Phaeodactylum tricornutum.
Competitive KO
Utilizing CRISPR-Cas9 to knockout genes involved in storage carbohydrate (chrysolaminarin) synthesis to force carbon flux toward lipid or pigment pathways.
CRISPRi Balancing
Applying dCas9-mediated repression to downregulate essential but competing pathways, finding the optimal balance between growth and production.
Multi-Gene KI
Site-specific integration of exogenous metabolic cassettes (e.g., the complete EPA biosynthetic route) into validated genomic safe harbors.
Subcellular Targeting
Optimization of transit peptides to ensure multi-enzyme complexes are correctly localized to the chloroplast or ER for substrate accessibility.
Promoter Libraries
Selection of constitutive or inducible promoters (e.g., Nitrate-inducible) to control the timing and magnitude of pathway expression.
Codon Bias Correction
Full-gene synthesis using proprietary Phaeodactylum-specific codon bias matrices to maximize translational throughput and avoid gene silencing.
Our integrated pipeline ensures that every engineered strain is backed by quantitative data and metabolic validation.
1. In Silico Modeling & Design
2. Multi-Locus Genetic Build
3. High-Throughput Phenotyping
4. Metabolic Validation
Establishment of a baseline metabolic model for the target strain. Identification of metabolic bottlenecks and competitive nodes. Design of CRISPR tools and donor templates for multi-gene editing.
Transformation via biolistic bombardment or bacterial conjugation. Implementation of simultaneous knockouts and site-specific knock-ins to reconstruct the target pathway.
Quantitative analysis using GC-MS (lipids), HPLC (pigments), and PAM (photosynthesis). Long-term stability testing over 50 passages to ensure the optimized phenotype remains fixed. Delivery of verified strains and data reports.
Flux-Driven Precision
Strategies are informed by predictive modeling, reducing the time spent on trial-and-error and focusing on targets with the highest metabolic impact.
Cross-Compartment Engineering
Expertise in coordinating metabolic flux across the nucleus, endoplasmic reticulum, and the four-membrane chloroplast of the diatom.
Industrial Alignment
Strains are optimized for performance in industrial photobioreactor conditions, focusing on high-density growth and stress resilience.
Comprehensive Verification
Every strain is delivered with full NGS verification of the genotype and extensive metabolic profiling to confirm the optimized phenotype.
Technical insights for your Phaeodactylum optimization project.
Contact Us1. How do you identify metabolic bottlenecks in diatoms?
We utilize Flux Balance Analysis (FBA) and 13C-metabolic flux analysis to map the actual flow of carbon through the cellular network, identifying which enzymatic steps are limiting the production of your target metabolite.
2. Can you optimize pathways for both lipids and pigments simultaneously?
Yes. Many lipid and pigment pathways share common precursors. We can use multiplexed CRISPR tools to balance the competition for these precursors, maximizing the yield of both bioproducts.
3. What is the benefit of using Safe Harbor loci for pathway integration?
Safe harbors are genomic regions where integration doesn't disrupt native functions. Integration here prevents gene silencing and ensures that the engineered pathway remains transcriptionally active across generations.
4. How does codon optimization improve pathway performance?
By matching the specific codon bias of P. tricornutum, we maximize translational efficiency and avoid the premature termination or mRNA degradation that often affects non-optimized exogenous genes.
5. Do you provide help with the selection of promoters?
Yes. We offer a library of constitutive (e.g., FCP) and inducible (e.g., Nitrate or Heat-shock) promoters to ensure that your pathway is expressed at the right time and level for maximal productivity.
6. Can you optimize the secretion of recombinant proteins from diatoms?
Yes. We utilize specialized signal peptides and knock out endogenous proteases to facilitate the efficient folding and secretion of proteins into the culture medium.
7. How is the genetic stability of optimized strains verified?
We perform long-term stability trials (30-50 passages) and utilize NGS to ensure the genetic modifications remain intact and the production titer does not drift over time.
8. What is the typical lead time for a pathway optimization project?
Due to the complexity of multi-gene engineering and metabolic validation, a standard project typically ranges from 18 to 26 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.