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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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Cyanobacteria and Algal-Based Biological Life Support System (BLSS) and Planetary Surface Atmospheric Revitalizing Bioreactor Brief Concept Review. Life (Basel) 2023; 13:life13030816. [PMID: 36983971 PMCID: PMC10057978 DOI: 10.3390/life13030816] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 02/28/2023] [Accepted: 03/06/2023] [Indexed: 03/19/2023] Open
Abstract
Exploring austere environments required a reimagining of resource acquisition and utilization. Cyanobacterial in situ resources utilization (ISRU) and biological life support system (BLSS) bioreactors have been proposed to allow crewed space missions to extend beyond the temporal boundaries that current vehicle mass capacities allow. Many cyanobacteria and other microscopic organisms evolved during a period of Earth’s history that was marked by very harsh conditions, requiring robust biochemical systems to ensure survival. Some species work wonderfully in a bioweathering capacity (siderophilic), and others are widely used for their nutritional power (non-siderophilic). Playing to each of their strengths and having them grow and feed off of each other is the basis for the proposed idea for a series of three bioreactors, starting from regolith processing and proceeding to nutritional products, gaseous liberation, and biofuel production. In this paper, we discuss what that three reactor system will look like, with the main emphasis on the nutritional stage.
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Gierl L, Horn H, Wagner M. Impact of Fe 2+ and Shear Stress on the Development and Mesoscopic Structure of Biofilms-A Bacillus subtilis Case Study. Microorganisms 2022; 10:2234. [PMID: 36422304 PMCID: PMC9699539 DOI: 10.3390/microorganisms10112234] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 11/04/2022] [Accepted: 11/07/2022] [Indexed: 07/25/2023] Open
Abstract
Bivalent cations are known to affect the structural and mechanical properties of biofilms. In order to reveal the impact of Fe2+ ions within the cultivation medium on biofilm development, structure and stability, Bacillus subtilis biofilms were cultivated in mini-fluidic flow cells. Two different Fe2+ inflow concentrations (0.25 and 2.5 mg/L, respectively) and wall shear stress levels (0.05 and 0.27 Pa, respectively) were tested. Mesoscopic biofilm structure was determined daily in situ and non-invasively by means of optical coherence tomography. A set of ten structural parameters was used to quantify biofilm structure, its development and change. The study focused on characterizing biofilm structure and development at the mesoscale (mm-range). Therefore, biofilm replicates (n = 10) were cultivated and analyzed. Three hypotheses were defined in order to estimate the effect of Fe2+ inflow concentration and/or wall shear stress on biofilm development and structure, respectively. It was not the intention to investigate and describe the underlying mechanisms of iron incorporation as this would require a different set of tools applied at microscopic levels as well as the use of, i.e., omic approaches. Fe2+ addition influenced biofilm development (e.g., biofilm accumulation) and structure markedly. Experiments revealed the accumulation of FeO(OH) within the biofilm matrix and a positive correlation of Fe2+ inflow concentration and biofilm accumulation. In more detail, independent of the wall shear stress applied during cultivation, biofilms grew approximately four times thicker at 2.5 mg Fe2+/L (44.8 µmol/L; high inflow concentration) compared to the low Fe2+ inflow concentration of 0.25 mg Fe2+/L (4.48 µmol/L). This finding was statistically verified (Scheirer-Ray-Hare test, ANOVA) and hints at a higher stability of Bacillus subtilis biofilms (e.g., elevated cohesive and adhesive strength) when grown at elevated Fe2+ inflow concentrations.
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Affiliation(s)
- Luisa Gierl
- Water Chemistry and Water Technology, Engler-Bunte-Institut, Karlsruhe Institute of Technology, Engler-Bunte-Ring 9a, 76131 Karlsruhe, Germany
| | - Harald Horn
- Water Chemistry and Water Technology, Engler-Bunte-Institut, Karlsruhe Institute of Technology, Engler-Bunte-Ring 9a, 76131 Karlsruhe, Germany
- German Technical and Scientific Association for Gas and Water (DVGW) Research Site at Karlsruhe Institute of Technology, Water Chemistry and Water Technology, Engler-Bunte-Ring 9a, 76131 Karlsruhe, Germany
| | - Michael Wagner
- Water Chemistry and Water Technology, Engler-Bunte-Institut, Karlsruhe Institute of Technology, Engler-Bunte-Ring 9a, 76131 Karlsruhe, Germany
- Institute of Biological Interfaces (IBG-1), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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Veerabadhran M, Gnanasekaran D, Wei J, Yang F. Anaerobic digestion of microalgal biomass for bioenergy production, removal of nutrients and microcystin: current status. J Appl Microbiol 2021; 131:1639-1651. [PMID: 33421297 DOI: 10.1111/jam.15000] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 01/03/2021] [Accepted: 01/06/2021] [Indexed: 12/16/2022]
Abstract
Using renewable microalgal biomass as active feedstocks for biofuels and bioproducts is explored to substitute petroleum-based fuels and chemicals. In the last few years, the importance of microalgae biomass has been realized as a renewable feedstock due to several positive attributes associated with it. Biorefinery via anaerobic digestion (AD) of microalgal biomass is a promising and sustainable method to produce value-added chemicals, edible products and biofuels. Microalgal biomass pretreatment is a significant process to enhance methane production by AD. Findings on the AD microbial community's variety and organization can give novel in turn on digester steadiness and presentation. This review presents a vital study of the existing facts on the AD microbial community and AD production. Co-digestion of microalgal biomass with different co-substrates was used in AD to enhance biogas production, and the process was economically viable with improved biodegradability. Microcystins, which are produced by toxic cyanobacterial blooms, create a severe hazard to environmental health. Anaerobic biodegradation is an effective method to degrade the microcystins and convert into nontoxic products. However, for the cost-effective conversion of biomass to energy and other beneficial byproducts, additional highly developed research is still required for large-scale AD of microalgal biomass.
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Affiliation(s)
- M Veerabadhran
- Hunan Provincial Key Laboratory of Clinical Epidemiology, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - D Gnanasekaran
- Hunan Provincial Key Laboratory of Clinical Epidemiology, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - J Wei
- Hunan Provincial Key Laboratory of Clinical Epidemiology, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - F Yang
- Hunan Provincial Key Laboratory of Clinical Epidemiology, Xiangya School of Public Health, Central South University, Changsha, Hunan, China.,Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, School of Public Health, University of South China, Hengyang, China
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Vijay D, Akhtar MK, Hess WR. Genetic and metabolic advances in the engineering of cyanobacteria. Curr Opin Biotechnol 2019; 59:150-156. [DOI: 10.1016/j.copbio.2019.05.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Revised: 05/16/2019] [Accepted: 05/22/2019] [Indexed: 11/28/2022]
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Guo Y, Yang R, Zhang Z, Wang X, Ye X, Chen S. Synergy of carbon and nitrogen removal of a co-culture of two aerobic denitrifying bacterial strains, Acinetobacter sp. GA and Pseudomonas sp. GP. RSC Adv 2018; 8:21558-21565. [PMID: 35539912 PMCID: PMC9080916 DOI: 10.1039/c8ra02721h] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 06/04/2018] [Indexed: 11/29/2022] Open
Abstract
Two newly isolated aerobic denitrifying bacterial strains (Acinetobacter sp. GA and Pseudomonas sp. GP) were co-cultured to investigate the synergy of carbon and nitrogen removal of different functional bacteria. The co-culture showed higher efficiency for removing total organic carbon (TOC) and total dissolved nitrogen (TDN) than strain GA or GP cultured separately. The inoculation ratio of 50 (strain GA/GP) was advantageous for the TOC and TDN removal efficiencies of the co-culture. The sequential co-culture tests showed that strain GP being inoculated after strain GA was inoculated for 36 h increased the TDN removal efficiency from 53.3% to 86.8%. This finding indicated that the activity of strain GA was important in the co-culture system, and the sequential co-culture could be advantageous to the synergistic effect of strains GA and GP. The co-culture of different functional bacteria can be an alternative method for improving the performance of aerobic denitrifying microorganisms for pollutant removal. Two newly isolated aerobic denitrifying bacterial strains (Acinetobacter sp. GA and Pseudomonas sp. GP) were co-cultured to investigate the synergy of carbon and nitrogen removal of different functional bacteria.![]()
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Affiliation(s)
- Yan Guo
- CAS Key Laboratory of Urban Pollutant Conversion
- Institute of Urban Environment
- Chinese Academy of Sciences
- Xiamen 361021
- People's Republic of China
| | - Ruili Yang
- CAS Key Laboratory of Urban Pollutant Conversion
- Institute of Urban Environment
- Chinese Academy of Sciences
- Xiamen 361021
- People's Republic of China
| | - Zhaoji Zhang
- CAS Key Laboratory of Urban Pollutant Conversion
- Institute of Urban Environment
- Chinese Academy of Sciences
- Xiamen 361021
- People's Republic of China
| | - Xiaojun Wang
- CAS Key Laboratory of Urban Pollutant Conversion
- Institute of Urban Environment
- Chinese Academy of Sciences
- Xiamen 361021
- People's Republic of China
| | - Xin Ye
- CAS Key Laboratory of Urban Pollutant Conversion
- Institute of Urban Environment
- Chinese Academy of Sciences
- Xiamen 361021
- People's Republic of China
| | - Shaohua Chen
- CAS Key Laboratory of Urban Pollutant Conversion
- Institute of Urban Environment
- Chinese Academy of Sciences
- Xiamen 361021
- People's Republic of China
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