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Chen W, Park YK, Studená L, Bell D, Hapeta P, Fu J, Nixon PJ, Ledesma-Amaro R. Synthetic, marine, light-driven, autotroph-heterotroph co-culture system for sustainable β-caryophyllene production. BIORESOURCE TECHNOLOGY 2024; 410:131232. [PMID: 39117247 DOI: 10.1016/j.biortech.2024.131232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2024] [Revised: 07/27/2024] [Accepted: 08/05/2024] [Indexed: 08/10/2024]
Abstract
Applying low-cost substrate is critical for sustainable bioproduction. Co-culture of phototrophic and heterotrophic microorganisms can be a promising solution as they can use CO2 and light as feedstock. This study aimed to create a light-driven consortium using a marine cyanobacterium Synechococcus sp. PCC 7002 and an industrial yeast Yarrowia lipolytica. First, the cyanobacterium was engineered to accumulate and secrete sucrose by regulating the expression of genes involved in sucrose biosynthesis and transport, resulting in 4.0 g/L of sucrose secretion. Then, Yarrowia lipolytica was engineered to efficiently use sucrose and produce β-caryophyllene that has various industrial applications. Then, co- and sequential-culture were optimized with different induction conditions and media compositions. A maximum β-caryophyllene yield of 14.1 mg/L was obtained from the co-culture. This study successfully established an artificial light-driven consortium based on a marine cyanobacterium and Y. lipolytica, and provides a foundation for sustainable bioproduction from CO2 and light through co-culture systems.
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Affiliation(s)
- Wenchao Chen
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, PR China; Department of Bioengineering, Bezos Centre for Sustainable Protein, Microbial Food Hub and Centre for Synthetic Biology, Imperial College London, London SW72AZ, UK
| | - Young-Kyoung Park
- Department of Bioengineering, Bezos Centre for Sustainable Protein, Microbial Food Hub and Centre for Synthetic Biology, Imperial College London, London SW72AZ, UK; Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350 Jouy-en-Josas, France
| | - Lucie Studená
- Department of Bioengineering, Bezos Centre for Sustainable Protein, Microbial Food Hub and Centre for Synthetic Biology, Imperial College London, London SW72AZ, UK
| | - David Bell
- SynbiCITE Innovation and Knowledge Centre, Imperial College London, London SW7 2AZ, UK
| | - Piotr Hapeta
- Department of Bioengineering, Bezos Centre for Sustainable Protein, Microbial Food Hub and Centre for Synthetic Biology, Imperial College London, London SW72AZ, UK
| | - Jing Fu
- Department of Bioengineering, Bezos Centre for Sustainable Protein, Microbial Food Hub and Centre for Synthetic Biology, Imperial College London, London SW72AZ, UK
| | - Peter J Nixon
- Department of Life Sciences, Imperial College London, London SW7 2AZ, UK
| | - Rodrigo Ledesma-Amaro
- Department of Bioengineering, Bezos Centre for Sustainable Protein, Microbial Food Hub and Centre for Synthetic Biology, Imperial College London, London SW72AZ, UK.
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Karitani Y, Yamada R, Matsumoto T, Ogino H. Improvement of cell growth in green algae Chlamydomonas reinhardtii through co-cultivation with yeast Saccharomyces cerevisiae. Biotechnol Lett 2024; 46:431-441. [PMID: 38578514 DOI: 10.1007/s10529-024-03483-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 02/20/2024] [Accepted: 03/12/2024] [Indexed: 04/06/2024]
Abstract
PURPOSE CO2 fixation methods using green algae have attracted considerable attention because they can be applied for the fixation of dilute CO2 in the atmosphere. However, green algae generally exhibit low CO2 fixation efficiency under atmospheric conditions. Therefore, it is a challenge to improve the CO2 fixation efficiency of green algae under atmospheric conditions. Co-cultivation of certain microalgae with heterotrophic microorganisms can increase the growth potential of microalgae under atmospheric conditions. The objective of this study was to determine the culture conditions under which the growth potential of green algae Chlamydomonas reinhardtii is enhanced by co-culturing with the yeast Saccharomyces cerevisiae, and to identify the cause of the enhanced growth potential. RESULTS When C. reinhardtii and S. cerevisiae were co-cultured with an initial green algae to yeast inoculum ratio of 1:3, the cell concentration of C. reinhardtii reached 133 × 105 cells/mL on day 18 of culture, which was 1.5 times higher than that of the monoculture. Transcriptome analysis revealed that the expression levels of 363 green algae and 815 yeast genes were altered through co-cultivation. These included genes responsible for ammonium transport and CO2 enrichment mechanism in green algae and the genes responsible for glycolysis and stress responses in yeast. CONCLUSION We successfully increased C. reinhardtii growth potential by co-culturing it with S. cerevisiae. The main reasons for this are likely to be an increase in inorganic nitrogen available to green algae via yeast metabolism and an increase in energy available for green algae growth instead of CO2 enrichment.
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Affiliation(s)
- Yukino Karitani
- Department of Chemical Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan
| | - Ryosuke Yamada
- Department of Chemical Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan.
| | - Takuya Matsumoto
- Department of Chemical Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan
| | - Hiroyasu Ogino
- Department of Chemical Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan
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Karitani Y, Yamada R, Matsumoto T, Ogino H. UV mutagenesis improves growth potential of green algae in a green algae-yeast co-culture system. Arch Microbiol 2024; 206:61. [PMID: 38216809 DOI: 10.1007/s00203-023-03796-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/10/2023] [Accepted: 12/13/2023] [Indexed: 01/14/2024]
Abstract
It is known that co-cultivation of green algae with heterotrophic microorganisms, such as yeast, improves green algae's growth potential and carbon dioxide fixation, even under low CO2 concentration conditions such as the atmosphere. Introducing mutations into green algae is also expected to enhance their growth potential. In this study, we sought to improve the growth potential of a co-culture system of the green algae Chlamydomonas reinhardtii and the yeast Saccharomyces cerevisiae by introducing mutations into the green algae. Additionally, we performed a transcriptome analysis of the co-culture of the green algae mutant strain with yeast, discussing the interaction between the green algae mutant strain and the yeast. When the green algae mutant strain was co-cultured with yeast, the number of green algae cells reached 152 × 105 cells/mL after 7 days of culture. This count was 2.6 times higher than when the wild-type green algae strain was cultured alone and 1.6 times higher than when the wild-type green algae strain and yeast were co-cultured. The transcriptome analysis also indicated that the primary reason for the increased growth potential of the green algae mutant strain was its enhanced photosynthetic activity and nitrogen utilization efficiency.
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Affiliation(s)
- Yukino Karitani
- Department of Chemical Engineering, Osaka Metropolitan University, 1-1 Gakuen-Cho, Naka-Ku, Sakai, Osaka, 599-8531, Japan
| | - Ryosuke Yamada
- Department of Chemical Engineering, Osaka Metropolitan University, 1-1 Gakuen-Cho, Naka-Ku, Sakai, Osaka, 599-8531, Japan.
| | - Takuya Matsumoto
- Department of Chemical Engineering, Osaka Metropolitan University, 1-1 Gakuen-Cho, Naka-Ku, Sakai, Osaka, 599-8531, Japan
| | - Hiroyasu Ogino
- Department of Chemical Engineering, Osaka Metropolitan University, 1-1 Gakuen-Cho, Naka-Ku, Sakai, Osaka, 599-8531, Japan
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