Yeast single-cell proteins from CO₂ with tandem biological systems

Area of Science:

• Biotechnology
• Sustainable Chemistry
• Food Science

Background:

• Carbon dioxide (CO2) is a major greenhouse gas, and its conversion into valuable products is crucial for sustainability.
• Single-cell protein (SCP) offers a promising alternative protein source for food and feed applications.
• Current methods for CO2 utilization often face challenges in efficiency and scalability.

Purpose of the Study:

• To introduce a novel tandem biological system for customized yeast single-cell protein (SCP) production from CO2.
• To explore the design principles and potential of this system for sustainable food and feed production.
• To highlight the role of nitrogen sources in optimizing SCP yield.

Main Methods:

• Sequential connection of spatially separated biological units for CO2 fixation and precision fermentation.
• Utilizing natural and engineered autotrophs for CO2 conversion.
• Investigating yeast as a platform for customized SCP production.

Main Results:

• The proposed tandem system enables efficient CO2 fixation followed by precision fermentation.
• Yeast demonstrates significant potential for producing customized SCP with tailored nutritional profiles.
• Nitrogen availability is identified as a critical factor for maximizing SCP production efficiency.

Conclusions:

• The developed tandem biological system offers a sustainable and carbon-conserving route for producing customized yeast SCP from CO2.
• This approach has the potential to mitigate carbon emissions while generating valuable food and feed resources.
• Further optimization, particularly regarding nitrogen sources, is key to realizing the full potential of this technology.