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Article ; Online: Environmental and nuclear influences on microalgal chloroplast gene expression.

Carrera-Pacheco, Saskya E / Hankamer, Ben / Oey, Melanie

2023 Volume 28, Issue 8, Page(s) 955–967

Abstract: Microalgal chloroplasts, such as those of the model organism Chlamydomonas reinhardtii, are emerging as a new platform to produce recombinant proteins, including industrial enzymes, diagnostics, as well as animal and human therapeutics. Improving ... ...

Abstract	Microalgal chloroplasts, such as those of the model organism Chlamydomonas reinhardtii, are emerging as a new platform to produce recombinant proteins, including industrial enzymes, diagnostics, as well as animal and human therapeutics. Improving transgene expression and final recombinant protein yields, at laboratory and industrial scales, require optimization of both environmental and cellular factors. Most studies on C. reinhardtii have focused on optimization of cellular factors. Here, we review the regulatory influences of environmental factors, including light (cycle time, intensity, and quality), carbon source (CO
MeSH term(s)	Humans ; Microalgae/genetics ; Microalgae/metabolism ; Genes, Chloroplast ; Biotechnology ; Recombinant Proteins/genetics ; Recombinant Proteins/metabolism ; Chloroplasts/genetics ; Chloroplasts/metabolism ; Chlamydomonas reinhardtii/genetics ; Chlamydomonas reinhardtii/metabolism
Chemical Substances	Recombinant Proteins
Language	English
Publishing date	2023-04-18
Publishing country	England
Document type	Journal Article ; Review
ZDB-ID	1305448-x
ISSN	1878-4372 ; 1360-1385
ISSN (online)	1878-4372
ISSN	1360-1385
DOI	10.1016/j.tplants.2023.03.013
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Article ; Online: Delivering impactful solutions for the bioeconomy.

Hankamer, Ben / Pregelj, Lisette / O'Kane, Shane / Hussey, Karen / Hine, Damian

Trends in plant science

2023 Volume 28, Issue 5, Page(s) 583–596

Abstract: We are increasingly challenged to operate within our planetary boundaries, while delivering on United Nations (UN) Sustainable Development Goal (SDG) 2030 targets, and net-zero emissions by 2050. Failure to solve these challenges risks economic, social, ... ...

Abstract	We are increasingly challenged to operate within our planetary boundaries, while delivering on United Nations (UN) Sustainable Development Goal (SDG) 2030 targets, and net-zero emissions by 2050. Failure to solve these challenges risks economic, social, political, climate, food, water, and fuel security. Therefore, new, scalable, and adoptable circular economy solutions are urgently required. The ability of plants to use light, capture CO
MeSH term(s)	Biotechnology ; Plants
Language	English
Publishing date	2023-03-20
Publishing country	England
Document type	Journal Article ; Review ; Research Support, Non-U.S. Gov't
ZDB-ID	1305448-x
ISSN	1878-4372 ; 1360-1385
ISSN (online)	1878-4372
ISSN	1360-1385
DOI	10.1016/j.tplants.2023.02.007
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Article ; Online: Circular biomanufacturing through harvesting solar energy and CO

Sørensen, Mette / Andersen-Ranberg, Johan / Hankamer, Ben / Møller, Birger Lindberg

Trends in plant science

2022 Volume 27, Issue 7, Page(s) 655–673

Abstract: Using synthetic biology, it is now time to expand the biosynthetic repertoire of plants and microalgae by utilizing the chloroplast to augment the production of desired high-value compounds and of oil-, carbohydrate-, or protein-enriched biomass based on ...

Abstract	Using synthetic biology, it is now time to expand the biosynthetic repertoire of plants and microalgae by utilizing the chloroplast to augment the production of desired high-value compounds and of oil-, carbohydrate-, or protein-enriched biomass based on direct harvesting of solar energy and the consumption of CO
MeSH term(s)	Biomass ; Carbon Dioxide/metabolism ; Chloroplasts/metabolism ; Microalgae ; Photosynthesis ; Solar Energy
Chemical Substances	Carbon Dioxide (142M471B3J)
Language	English
Publishing date	2022-04-05
Publishing country	England
Document type	Journal Article ; Review ; Research Support, Non-U.S. Gov't
ZDB-ID	1305448-x
ISSN	1878-4372 ; 1360-1385
ISSN (online)	1878-4372
ISSN	1360-1385
DOI	10.1016/j.tplants.2022.03.001
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Article: Sustainable Production of Pigments from Cyanobacteria.

Deepika, Charu / Wolf, Juliane / Roles, John / Ross, Ian / Hankamer, Ben

Advances in biochemical engineering/biotechnology

2022 Volume 183, Page(s) 171–251

Abstract: Pigments are intensely coloured compounds used in many industries to colour other materials. The demand for naturally synthesised pigments is increasing and their production can be incorporated into circular bioeconomy approaches. Natural pigments are ... ...

Abstract	Pigments are intensely coloured compounds used in many industries to colour other materials. The demand for naturally synthesised pigments is increasing and their production can be incorporated into circular bioeconomy approaches. Natural pigments are produced by bacteria, cyanobacteria, microalgae, macroalgae, plants and animals. There is a huge unexplored biodiversity of prokaryotic cyanobacteria which are microscopic phototrophic microorganisms that have the ability to capture solar energy and CO
MeSH term(s)	Carotenoids/metabolism ; Cyanobacteria/metabolism ; Microalgae
Chemical Substances	Carotenoids (36-88-4)
Language	English
Publishing date	2022-08-30
Publishing country	Germany
Document type	Journal Article
ISSN	0724-6145
ISSN	0724-6145
DOI	10.1007/10_2022_211
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Article ; Online: Promoting cell growth and characterizing partial symbiotic relationships in the co-cultivation of green alga Chlamydomonas reinhardtii and Escherichia coli.

Yamada, Ryosuke / Yokota, Moe / Matsumoto, Takuya / Hankamer, Ben / Ogino, Hiroyasu

Biotechnology journal

2022 Volume 18, Issue 2, Page(s) e2200099

Abstract: Background: By co-culturing selected microalgae and heterotrophic microorganisms, the growth rate of microalgae can be improved even under atmospheric conditions with a low CO: Main methods and major results: In the co-culture, the number of C. ... ...

Abstract	Background: By co-culturing selected microalgae and heterotrophic microorganisms, the growth rate of microalgae can be improved even under atmospheric conditions with a low CO Main methods and major results: In the co-culture, the number of C. reinhardtii cells reached 2.22 × 10 Conclusions: Consequently, E. coli plays a key role in promoting the growth of C. reinhardtii as well as the accumulation of starch which is a valuable intermediate for the production of a range of useful chemicals from CO
MeSH term(s)	Chlamydomonas reinhardtii/genetics ; Escherichia coli/metabolism ; Carbon Dioxide ; Photosynthesis ; Starch/metabolism ; Carbon
Chemical Substances	Carbon Dioxide (142M471B3J) ; Starch (9005-25-8) ; Carbon (7440-44-0)
Language	English
Publishing date	2022-12-13
Publishing country	Germany
Document type	Journal Article
ZDB-ID	2221885-3
ISSN	1860-7314 ; 1860-6768
ISSN (online)	1860-7314
ISSN	1860-6768
DOI	10.1002/biot.202200099
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Article: Techno-economic evaluation of microalgae high-density liquid fuel production at 12 international locations.

Roles, John / Yarnold, Jennifer / Hussey, Karen / Hankamer, Ben

Biotechnology for biofuels

2021 Volume 14, Issue 1, Page(s) 133

Abstract: Background: Microalgae-based high-density fuels offer an efficient and environmental pathway towards decarbonization of the transport sector and could be produced as part of a globally distributed network without competing with food systems for arable ... ...

Abstract	Background: Microalgae-based high-density fuels offer an efficient and environmental pathway towards decarbonization of the transport sector and could be produced as part of a globally distributed network without competing with food systems for arable land. Variations in climatic and economic conditions significantly impact the economic feasibility and productivity of such fuel systems, requiring harmonized technoeconomic assessments to identify important conditions required for commercial scale up. Methods: Here, our previously validated Techno-economic and Lifecycle Analysis (TELCA) platform was extended to provide a direct performance comparison of microalgae diesel production at 12 international locations with variable climatic and economic settings. For each location, historical weather data, and jurisdiction-specific policy and economic inputs were used to simulate algal productivity, evaporation rates, harvest regime, CapEx and OpEx, interest and tax under location-specific operational parameters optimized for Minimum Diesel Selling Price (MDSP, US$ L Results: Under a for-profit business model, 10 of the 12 locations achieved a minimum diesel selling price (MDSP) under US$ 1.85 L Conclusions: The public utility approach could reduce the fuel price toward cost-competitiveness, providing a key step on the path to a profitable fully commercial renewable fuel industry by attracting the investment needed to advance technology and commercial biorefinery co-production options. Governments' adoption of such an approach could accelerate decarbonization, improve fuel security, and help support a local COVID-19 economic recovery. This study highlights the benefits and limitations of different factors at each location (e.g., climate, labour costs, policy, C-credits) in terms of the development of the technology-providing insights on how governments, investors and industry can drive the technology forward.
Language	English
Publishing date	2021-06-07
Publishing country	England
Document type	Journal Article
ZDB-ID	2421351-2
ISSN	1754-6834
ISSN	1754-6834
DOI	10.1186/s13068-021-01972-4
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Article ; Online: Microalgal nanocellulose - opportunities for a circular bioeconomy.

Ross, Ian L / Shah, Sarah / Hankamer, Ben / Amiralian, Nasim

Trends in plant science

2021 Volume 26, Issue 9, Page(s) 924–939

Abstract: Over 3 billion years, photosynthetic algae have evolved complex uses for cellulose, the most abundant polymer worldwide. A major cell-wall component of lignocellulosic plants, seaweeds, microalgae, and bacteria, cellulose can be processed to ... ...

Abstract	Over 3 billion years, photosynthetic algae have evolved complex uses for cellulose, the most abundant polymer worldwide. A major cell-wall component of lignocellulosic plants, seaweeds, microalgae, and bacteria, cellulose can be processed to nanocellulose, a promising nanomaterial with novel properties. The structural diversity of macro- and microalgal nanocelluloses opens opportunities to couple low-impact biomass production with novel, green-chemistry processing to yield valuable, sustainable nanomaterials for a multitude of applications ranging from novel wound dressings to organic solar cells. We review the origins of algal cellulose and the applications and uses of nanocellulose, and highlight the potential for microalgae as a nanocellulose source. Given the limited state of current knowledge, we identify research challenges and strategies to help to realise this potential.
MeSH term(s)	Biomass ; Cellulose ; Microalgae ; Photosynthesis
Chemical Substances	Cellulose (9004-34-6)
Language	English
Publishing date	2021-06-15
Publishing country	England
Document type	Journal Article ; Review
ZDB-ID	1305448-x
ISSN	1878-4372 ; 1360-1385
ISSN (online)	1878-4372
ISSN	1360-1385
DOI	10.1016/j.tplants.2021.05.004
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Article ; Online: Environmental and nuclear influences on microalgal chloroplast gene expression

Carrera-Pacheco, Saskya E. / Hankamer, Ben / Oey, Melanie

Trends in Plant Science. 2023 Apr. 18,

2023

Abstract	Microalgal chloroplasts, such as those of the model organism Chlamydomonas reinhardtii, are emerging as a new platform to produce recombinant proteins, including industrial enzymes, diagnostics, as well as animal and human therapeutics. Improving transgene expression and final recombinant protein yields, at laboratory and industrial scales, require optimization of both environmental and cellular factors. Most studies on C. reinhardtii have focused on optimization of cellular factors. Here, we review the regulatory influences of environmental factors, including light (cycle time, intensity, and quality), carbon source (CO₂ and organic), and temperature. In particular, we summarize their influence via the redox state, cis-elements, and trans-factors on biomass and recombinant protein production to support the advancement of emerging large-scale light-driven biotechnology applications.
Keywords	Chlamydomonas reinhardtii ; biomass ; biotechnology ; carbon ; carbon dioxide ; chloroplast genes ; chloroplasts ; diagnostic techniques ; gene expression ; humans ; microalgae ; protein synthesis ; recombinant proteins ; temperature ; therapeutics ; environmental ; recombinant ; chloroplast ; cis-elements ; trans-factors
Language	English
Dates of publication	2023-0418
Publishing place	Elsevier Ltd
Document type	Article ; Online
Note	Pre-press version
ZDB-ID	1305448-x
ISSN	1878-4372 ; 1360-1385
ISSN (online)	1878-4372
ISSN	1360-1385
DOI	10.1016/j.tplants.2023.03.013
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Microalgal Aquafeeds As Part of a Circular Bioeconomy.

Yarnold, Jennifer / Karan, Hakan / Oey, Melanie / Hankamer, Ben

Trends in plant science

2019 Volume 24, Issue 10, Page(s) 959–970

Abstract: Photosynthetic microalgae are unicellular plants, many of which are rich in protein, lipids, and bioactives and form an important part of the base of the natural aquatic food chain. Population growth, demand for high-quality protein, and depletion of ... ...

Abstract	Photosynthetic microalgae are unicellular plants, many of which are rich in protein, lipids, and bioactives and form an important part of the base of the natural aquatic food chain. Population growth, demand for high-quality protein, and depletion of wild fishstocks are forecast to increase aquacultural fish demand by 37% between 2016 and 2030. This review highlights the role of microalgae and recent advances that can support a sustainable 'circular' aquaculture industry. Microalgae-based feed supplements and recombinant therapeutic production offer significant opportunities to improve animal health, disease resistance, and yields. Critically, microalgae in biofloc, 'green water', nutrient remediation, and integrated multitrophic aquaculture technologies offer innovative solutions for economic and environmentally sustainable development in line with key UN Sustainability Goals.
MeSH term(s)	Animals ; Aquaculture ; Food Chain ; Microalgae ; Photosynthesis
Language	English
Publishing date	2019-07-05
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Review
ZDB-ID	1305448-x
ISSN	1878-4372 ; 1360-1385
ISSN (online)	1878-4372
ISSN	1360-1385
DOI	10.1016/j.tplants.2019.06.005
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Article: Sargassum blooms in the Atlantic Ocean – From a burden to an asset

Marx, Ute C / Roles, John / Hankamer, Ben

Elsevier B.V. Algal research. 2021 Apr., v. 54

2021

Abstract: Recently there has been a significant increase in the amount and frequency of seaweed blooms of the holopelagic brown macroalgae Sargassum fluitans and natans (hereafter Sargassum) in the Atlantic Ocean. These blooms impose a major burden on residents (e. ...

Abstract	Recently there has been a significant increase in the amount and frequency of seaweed blooms of the holopelagic brown macroalgae Sargassum fluitans and natans (hereafter Sargassum) in the Atlantic Ocean. These blooms impose a major burden on residents (e.g. rotting beached Sargassum, unpleasant odor, toxic gases), the local economy of countries with affected coast lines (e.g. impacting tourism and aquaculture, costs for remediation), and have a significant impact on the environment (e.g. beaches and coastal areas) and local marine wildlife. Here we present a Techno-Economic Analysis to demonstrate how this burden can be turned into an economic, social and environmental asset. The suggested process involves sustainable ship-based harvesting of excess biomass (up to 6.3 MT·year⁻¹) and using hydrothermal liquefaction (HTL) and established fuel refining processes to deliver renewable liquid fuels. Sea-based harvesting of Sargassum addresses the primary cost impediment for algae-based renewable fuel production, reducing capital and operating costs by 78% and 66% respectively compared with currently modelled land-based microalgae renewable fuel production processes. The modelled approach charts a path to cost competitive renewable fuels that reduce CO₂ emissions while mitigating the economic, social and environmental problems caused by these large Sargassum algae blooms. The financial analysis of the process yielded an Internal Rate of Return (IRR) between 2.4% and 28.1% based on the scenarios analyzed. The process could generate up to 8500 bbl of crude oil per day profitably at US$43 bbl⁻¹ (10% IRR), equivalent to 470 ML of diesel or jet fuel per year as well as biofertilizers and recycled nutrients, employ around 200 direct personnel and create up to 1000 indirect jobs.
Keywords	Sargassum ; algal blooms ; aquaculture ; assets ; beaches ; biofertilizers ; biomass ; capital ; carbon dioxide ; coasts ; emissions ; employment ; environmental impact ; frequency ; fuel production ; gases ; harvesting ; human resources ; hydrothermal liquefaction ; liquids ; macroalgae ; microalgae ; nutrients ; odors ; operating costs ; petroleum ; refining ; remediation ; renewable energy sources ; research ; tourism ; toxicity ; wildlife ; Atlantic Ocean
Language	English
Dates of publication	2021-04
Publishing place	Elsevier B.V.
Document type	Article
Note	NAL-light
ISSN	2211-9264
DOI	10.1016/j.algal.2021.102188
Database	NAL-Catalogue (AGRICOLA)

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