Related Experiment Video
Updated: Jun 14, 2026
13:17
Microarray Analysis for Saccharomyces cerevisiae
Published on: April 7, 2011
13.6K
Exploration of In Situ Extraction for Enhanced Triterpenoid Production by Saccharomyces cerevisiae
Mariam Dianat1, Sarah Straaten1, Aldo Maritato1
1Institute of Applied Microbiology (iAMB), Aachen Biology and Biotechnology (ABBt), RWTH Aachen University, Aachen, Germany.
Microbial Biotechnology
|December 19, 2024
Summary
Microbial production of plant triterpenoids faces challenges with intracellular accumulation. This study developed in situ product extraction using isopropyl myristate, significantly improving production efficiency and yield.
Area of Science:
- Biotechnology
- Metabolic Engineering
- Chemical Engineering
Background:
- Plant-derived triterpenoids are valuable compounds with applications in cosmetics, nutraceuticals, and pharmaceuticals.
- Microbial production offers a scalable alternative to plant extraction but is hindered by intracellular product accumulation, increasing downstream processing costs.
- Efficient recovery methods are crucial for economically viable microbial triterpenoid synthesis.
Purpose of the Study:
- To develop and evaluate an in situ product extraction strategy for microbial triterpenoid production.
- To overcome the limitation of intracellular accumulation in engineered Saccharomyces cerevisiae.
- To enhance overall productivity and yield of triterpenoids through improved downstream processing.
Main Methods:
- Screening of organic solvents for efficient in situ extraction of triterpenoids from engineered yeast.
- Utilizing isopropyl myristate as a water-immiscible extractant for triterpenoids.
- Implementing two configurations: repeated batch fermentation with sequential extraction and fed-batch fermentation with continuous extraction.
- Employing omics analyses to identify limitations in microbial host performance.
Main Results:
- Isopropyl myristate was identified as an effective solvent, achieving up to 90% extraction of total triterpenoids.
- Combining isopropyl myristate with β-cyclodextrins further enhanced extraction efficiency.
- Repeated batch fermentation with in situ extraction yielded 1.8 times higher production compared to the reference.
- Continuous extraction during fed-batch fermentation achieved 90% product recovery and extended the production phase.
Conclusions:
- In situ product extraction into an organic phase is a viable strategy to overcome intracellular accumulation of microbial triterpenoids.
- Isopropyl myristate serves as an effective extractant, significantly improving production efficiency and yield.
- Microbial host limitations, identified via omics, represent a future bottleneck for further triterpenoid production enhancement.
Related Concept Videos
01:23Microbial Fermentation
Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...
01:29Microbes in Food Production
Microbial fermentation is central to food biotechnology, enhancing flavor, texture, preservation, and stability. Fermentative microorganisms metabolize carbohydrates into organic acids, alcohols, and other metabolites that inhibit spoilage organisms and improve digestibility while contributing distinctive sensory qualities.In baking, amylases naturally present in flour hydrolyze starch into monosaccharides such as glucose, which Saccharomyces cerevisiae ferments anaerobically. Through...
01:25Microbes in Beverage Production
Alcoholic beverages such as wine, beer, and spirits are the products of microbial fermentation processes that transform simple sugars into ethanol and a wide array of complex flavor compounds. These transformations rely on the metabolic activities of specific yeasts and bacteria, which are selected and controlled to yield the desired beverage characteristics.Wine Fermentation and MaturationWine production begins with the crushing of grapes to release juice and pulp, forming a must that is...
01:22Bioreactor Controls-III
Strain improvement is a foundational strategy in industrial microbiology aimed at maximizing microbial productivity, particularly because natural isolates typically yield commercially valuable products in very low concentrations. Although optimizing the culture medium and environmental conditions can improve yields, these adjustments are inherently limited by the organism’s genetic potential. As a result, the focus shifts toward genetic modifications to enhance biosynthetic capacity. The...
01:27Production of Alcohol
Continuous fermentation is a key strategy in industrial ethanol production, particularly when efficiency, scalability, and high yields are essential. This approach allows for uninterrupted operation and optimized resource utilization. The primary feedstock, corn starch, undergoes enzymatic hydrolysis facilitated by α-amylase and glucoamylase. These enzymes break down the starch into fermentable sugars such as glucose, which are readily assimilated by fermentative microorganisms.Fermentation...
01:25Production of Organic Acids
Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...