Related Experiment Video
Updated: Apr 17, 2026
06:24
Generic Protocol for Optimization of Heterologous Protein Production Using Automated Microbioreactor Technology
Published on: December 15, 2017
10.0K
Central composite design for optimizing istamycin production by Streptomyces tenjimariensis
Fatma Alzahraa M Gomaa1,2, Heba Mohammed Refat M Selim3, Mohammad Y Alshahrani4
1Department of Pharmacognosy and Medicinal Herbs, Faculty of Pharmacy, Al-Baha University, 65779, Al-Bahah, Saudi Arabia.
World Journal of Microbiology & Biotechnology
|September 9, 2024
Summary
Istamycins (ISMs), potent aminoglycoside antibiotics, showed significantly increased production through optimized environmental conditions. Statistical optimization using Central Composite Design (CCD) achieved a 31-fold increase in ISM yield.
Area of Science:
- Microbiology
- Biotechnology
- Antibiotic Production
Background:
- Istamycins (ISMs) are broad-spectrum aminoglycoside antibiotics (AGAs) produced by Streptomyces tenjimariensis ATCC 31603.
- ISMs exhibit bactericidal activity against clinically relevant pathogens, making them valuable therapeutic agents.
Purpose of the Study:
- To statistically optimize environmental conditions for enhanced Istamycins (ISMs) production.
- To investigate the impact of culture media, incubation time, agitation, pH, temperature, and calcium carbonate concentration on ISM yield.
Main Methods:
- One Factor At A Time (OFAT) approach to study initial parameters.
- Central Composite Design (CCD) utilizing response surface methodology (RSM) for multi-variable optimization.
- Experimental verification of the optimized model.
Main Results:
- Optimized media (aminoglycoside production and protoplast regeneration) and conditions (6-day incubation, 200 rpm agitation) significantly boosted productivity.
- CCD model identified optimal initial pH (6.38), incubation temperature (30 °C), and 5.3% CaCO3 concentration.
- Experimental validation resulted in a 31-fold increase in ISM production compared to unoptimized conditions.
Conclusions:
- Central Composite Design (CCD) is an effective tool for optimizing Istamycin (ISM) production at the shake flask level.
- The optimized conditions require scale-up validation in fermenters for industrial application.
- Environmental factors significantly influence ISM production by Streptomyces tenjimariensis ATCC 31603.
Related Concept Videos
01:22Bioreactor Controls-III
57
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...
57
01:30Designing Growth Media for Bioreactors
67
Growth media provide essential nutrients that support cell growth and metabolism, thereby enhancing the yield of valuable products such as enzymes, antibiotics, and biomass. Designing an effective growth medium involves balancing all components to prevent nutrient limitations or toxic excesses, both of which can impair growth and reduce product yields.Composition of a Typical Growth MediumA typical growth medium contains carbon and nitrogen sources, salts, vitamins, trace elements, and...
67
01:14Scale-Up Processes
90
The scale-up of microbial fermentation processes is essential in industrial biotechnology, allowing the transition from laboratory-scale experiments to commercial-scale production while aiming to maintain product yield and quality. This process requires meticulous adjustment of equipment design, process parameters, and contamination control strategies to accommodate increasing culture volumes.At the laboratory scale, cultures are typically maintained in 1 to 10-liter glass or autoclavable...
90
01:27Upstream Processing
89
Upstream processing represents a critical phase in biomanufacturing, wherein biological systems such as microorganisms, mammalian cells, or insect cells are cultivated to produce therapeutic proteins, vaccines, enzymes, or other biologically derived products. This phase encompasses all steps from the selection and genetic manipulation of the production organism to the cultivation of cells in bioreactors under tightly controlled environmental conditions.Host Selection and Genetic OptimizationThe...
89
01:27Production of Antibiotics
198
Penicillin, one of the earliest and most widely used antibiotics, is produced industrially by the filamentous fungus Penicillium chrysogenum. Large stirred-tank bioreactors ranging from tens to hundreds of thousands of liters maintain tightly controlled temperature, pH, and dissolved oxygen conditions to support fungal metabolism and maximize antibiotic yield. Penicillin is a secondary metabolite, synthesized primarily during the stationary growth phase, which requires a carefully managed...
198
01:30Production of Pharmaceuticals
77
Industrial insulin production uses genetically engineered E. coli expressing a proinsulin gene controlled by a tryptophan promoter and containing a methionine linker for later cleavage. The cells also carry ampicillin resistance for selective growth. Seed cultures are stored at −80 °C and production begins by thawing a small amount to inoculate starter cultures, which are progressively scaled to a 50,000-L bioreactor. In the bioreactor, E. coli grow in nutrient-rich media under...
77