Tohoku Univ. Technology: Highly Dispersible Filamentous Fungi with Reduced Hypoxia and Viscosity in Culture: T24-082
Total improvement of the physical, chemical, and biological environment in the culture tank → Evolution of high cost-effectiveness, high-performance, high-density culture and fermentation
Filamentous fungi represented by Aspergillus oryzae have high production capacity of proteins and low molecular weight compounds and are utilized for industrial production by fermentation. However, in liquid culture, hyphae are entangled and clump together, and there is a limit to maximizing the space of the culture tank and increasing the production of substances. Highly dispersible filamentous fungi (AGΔ-GAGΔ, see Related Inventions and Documents), in which the viscosity of the culture solution and the formation of clumps are drastically reduced compared to the wild-type strain, is a technology to solve this problem. On the other hand, AGΔ-GAGΔ has excellent culture properties as a filamentous fungus, but the viscosity of the culture solution is still higher than that of yeast and bacteria. Therefore, it is required to develop a low viscosity strain that enables high gas dispersion and product yield under lower agitation power (energy). The present invention relates to the next generation highly dispersible filamentous fungus AGΔ-GAGΔ-ΔsrbB, in which a deletion of the novel property modifying factor srbB gene is additionally introduced into AGΔ-GAGΔ strain. In this new strain, a significant drop in culture viscosity improved agitation efficiency and led to enhanced productivity compared to AGΔ-GAGΔ. Furthermore, the addition of a deletion of the rolA gene encoding surface-active protein RolA enhances the efficiency.
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The revenue generated from technology transfer is reinvested into universities and researchers as new research funding, which is used to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will actively promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by concluding basic technology transfer agreements with the following universities (as of April 1, 2026): - Tohoku University - Hirosaki University - Iwate University - Akita University - Fukushima University - Yamagata University - Tohoku Gakuin University - Iwate Medical University - Fukushima Medical University - Aizu University - Miyagi University - Hokkaido University - Muroran Institute of Technology - Showa Medical University - Asahikawa Medical University
