Fumaric Acid Bioproduction Engineering Service

Fumaric Acid is a dicarboxylic acid used as an acidulant in food, a component in polyester resins, and a pharmaceutical precursor. Conventional petrochemical synthesis involves high energy consumption and relies on non-renewable maleic anhydride feedstock. Biosynthesis offers a greener alternative, but often faces a low conversion rate due to metabolic bottlenecks and consumption of Fumaric Acid by the host's own pathways. This hinders the industrial competitiveness of bioproduction.

CD Biosynsis offers a synthetic biology service focused on achieving high-titer, high-yield microbial production. Our core strategy involves modification of metabolic regulation in acid-producing Klebsiella (or engineered E. coli), concentrating on the reductive TCA cycle route which efficiently produces Fumarate from sugar. This is coupled with the directed evolution of fumarase (Fumarate Hydratase) to reverse its activity—or, more commonly, to precisely knock out its activity—to prevent the conversion of Fumarate back to Malate or other intermediates, ensuring maximum product accumulation. This integrated approach aims to deliver a high-yield, pure, and sustainable Fumaric Acid product.

Pain Points

Transitioning to competitive biosynthetic Fumaric Acid production faces these key challenges:

• High Energy Consumption in Petrochemical Synthesis: The maleic anhydride route requires high temperatures and pressures , resulting in a large carbon footprint and high utility costs.
• Low Conversion Rate in Biosynthesis: Fumaric Acid is an intermediate in the TCA cycle. It is rapidly consumed downstream to succinate/malate for energy production and biomass synthesis, leading to low final titers.
• Inhibitory Byproducts: Many microbial strains co-produce unwanted organic acids (e.g., succinic acid) which must be separated, increasing downstream purification complexity and cost .
• pH Sensitivity: Fermentation must often be conducted at high pH to maximize Fumarate solubility, increasing the use of neutralizing agents and overall costs.

A successful solution must redirect central carbon metabolism to Fumarate synthesis and block its further consumption.

Solutions

CD Biosynsis utilizes advanced metabolic engineering to optimize Fumaric Acid production:

Modification of Metabolic Regulation in Klebsiella

           

We engineer the central carbon pathway to enhance flux through the reductive TCA branch (PEP →OAA →Malate →Fumarate), the most efficient route for Fumarate synthesis.

Directed Evolution of Fumarase (Knockout/Inactivation)

We use CRISPR technology to inactivate or knock out the native fumarase (FumABC) gene to stop Fumarate from being consumed by the TCA cycle, ensuring its maximum accumulation.

Co-factor and Redox Balance Optimization

We modify pathways to control the NADH/NAD+ ratio , which is essential for maximizing the flux through the desired reductive pathway for high yield.

Product Transport and Tolerance Engineering

We screen or introduce Fumarate transporters to boost its secretion and enhance the strain’s tolerance to high concentrations of the final product.

This systematic approach is focused on redirecting carbon flow and stabilizing the Fumarate intermediate against further metabolism.

Advantages

Our Fumaric Acid engineering service is dedicated to pursuing the following production goals:

High Titer and Conversion Yield

Metabolic pathway blockade ensures maximum substrate conversion into Fumarate, leading to high final product concentrations.

Lower Energy and Carbon Footprint

Microbial fermentation occurs under mild conditions, making it a sustainable alternative to high-energy petrochemical synthesis.

Minimized Byproduct Formation

Targeted metabolic engineering reduces the co-production of succinate and other acids, simplifying downstream purification. [Image of Cost Reduction Icon]

Feedstock Flexibility

Engineered hosts can efficiently utilize low-cost renewable carbon sources (e.g., glucose, glycerol) as feedstock.

High Optical Purity

Biosynthesis ensures the specific Fumarate isomer is produced, avoiding the need for racemic separation.

We provide a biosynthetic platform aimed at maximizing the yield and minimizing the purification and environmental costs of Fumaric Acid production.

Process

Our Fumaric Acid strain engineering service follows a rigorous, multi-stage research workflow:

• Fumarate Consumption Pathway Blockage: Use CRISPR to knock out key downstream enzymes (Fumarase, Succinate dehydrogenase) to ensure Fumarate accumulation.
• Upstream Flux Enhancement: Overexpress Pyruvate carboxylase or PEP carboxylase to increase carbon flow into the C4 synthesis route.
• Redox and NADH Balancing: Engineer core metabolic pathways (e.g., PPP) to provide the optimal reducing power required for the desired TCA branch activity.
• Transport Engineering: Introduce efficient organic acid transporters to actively export Fumarate from the cytoplasm, reducing intracellular toxicity.
• Fermentation Performance Validation: Test the final engineered strain in fed-batch fermentation to assess Fumaric Acid titer, yield, and fermentation stability .
• Result Report Output: Compile a detailed Experimental Report including gene modification data, flux analysis, and fermentation metrics (yield, titer, and purity) , supporting process transfer.

Technical communication is maintained throughout the process, focusing on timely feedback regarding yield and purity.

Explore the potential for a high-performance, sustainable Fumaric Acid supply. CD Biosynsis provides customized strain engineering solutions:

• Detailed Metabolic Flux and Titer Analysis Report , demonstrating success in carbon redirection and titer increase.
• Consultation on fermentation control strategies optimized for high-density growth and high Fumarate accumulation.
• Experimental reports include complete raw data on carbon yield (g Fumaric Acid/g substrate) and product purity , essential for commercial application.