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Niu L, Liu L, Zhang J, Scali M, Wang W, Hu X, Wu X. Genetic Engineering of Starch Biosynthesis in Maize Seeds for Efficient Enzymatic Digestion of Starch during Bioethanol Production. Int J Mol Sci 2023; 24:ijms24043927. [PMID: 36835340 PMCID: PMC9967003 DOI: 10.3390/ijms24043927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/20/2023] [Accepted: 02/14/2023] [Indexed: 02/17/2023] Open
Abstract
Maize accumulates large amounts of starch in seeds which have been used as food for human and animals. Maize starch is an importantly industrial raw material for bioethanol production. One critical step in bioethanol production is degrading starch to oligosaccharides and glucose by α-amylase and glucoamylase. This step usually requires high temperature and additional equipment, leading to an increased production cost. Currently, there remains a lack of specially designed maize cultivars with optimized starch (amylose and amylopectin) compositions for bioethanol production. We discussed the features of starch granules suitable for efficient enzymatic digestion. Thus far, great advances have been made in molecular characterization of the key proteins involved in starch metabolism in maize seeds. The review explores how these proteins affect starch metabolism pathway, especially in controlling the composition, size and features of starch. We highlight the roles of key enzymes in controlling amylose/amylopectin ratio and granules architecture. Based on current technological process of bioethanol production using maize starch, we propose that several key enzymes can be modified in abundance or activities via genetic engineering to synthesize easily degraded starch granules in maize seeds. The review provides a clue for developing special maize cultivars as raw material in the bioethanol industry.
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Affiliation(s)
- Liangjie Niu
- National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou 450002, China
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Liangwei Liu
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
- Key Laboratory of Enzyme Engineering of Agricultural Microbiology, Ministry of Agriculture and Rural Affairs, Henan Agricultural University, Zhengzhou 450002, China
| | - Jinghua Zhang
- National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou 450002, China
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Monica Scali
- Department of Life Sciences, University of Siena, 53100 Siena, Italy
| | - Wei Wang
- National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou 450002, China
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
- Correspondence:
| | - Xiuli Hu
- National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou 450002, China
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Xiaolin Wu
- National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou 450002, China
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
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2
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Ami J, Mensah M, Asiedu NY, Thygesen A. Optimization of Reducing Sugar Concentration from Ulva fasciata Using Cellulase via Response Surface Methodology Techniques. Ind Biotechnol (New Rochelle N Y) 2023. [DOI: 10.1089/ind.2022.0024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Affiliation(s)
- Johannes Ami
- Department of Chemical Engineering, College of Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Moses Mensah
- Department of Chemical Engineering, College of Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Nana Yaw Asiedu
- Department of Chemical Engineering, College of Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Anders Thygesen
- Department of Chemical and Biochemical Engineering, Technical University of Denmark, Lyngby, Denmark
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3
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Banjare P, Singh J, Papa E, Roy PP. Aquatic toxicity prediction of diverse pesticides on two algal species using QSTR modeling approach. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:10599-10612. [PMID: 36083366 DOI: 10.1007/s11356-022-22635-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 08/17/2022] [Indexed: 06/15/2023]
Abstract
With the aim of identification of toxic nature of the diverse pesticides on the aquatic compartment, a large dataset of pesticides (n = 325) with experimental toxicity data on two algal test species (Pseudokirchneriella subcapitata (PS) (synonym: Raphidocelis subcapitata, Selenastrum capricornutum) and Scenedemus subspicatus (SS)) was gathered and subjected to quantitative structure toxicity relationship (QSTR) analysis to predict aquatic toxicity of pesticides. The QSTR models were developed by multiple linear regressions (MLRs), and the genetic algorithm (GA) was used for the variable selection. The developed GA-MLR models were statistically robust enough internally (Q2LOO = 0.620-0.663) and externally (Q2Fn = 0.693-0.868, CCCext = 0.843-0.877). The leverage approach of applicability domain (AD) and prediction reliability indicator assured the reliability of the developed models. The mechanistic interpretation highlighted that the presence of SO2, F and aromatic rings influenced the toxicity of pesticides towards PS species while the presence of alkyl, alkyl halide, aromatic rings and carbonyl was responsible for the toxicity of pesticides towards SS species. Additionally, we have reported the application of developed models to pesticides without experimental value and the cumulative toxicity of pesticides on the aquatic environment by using principal component analysis (PCA). The reliable prediction and prioritization of toxic compounds from the developed models will be useful in the aquatic toxicity assessment of pesticides.
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Affiliation(s)
- Purusottam Banjare
- Department of Pharmacy, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, 495009, India
| | - Jagadish Singh
- Department of Pharmacy, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, 495009, India
| | - Ester Papa
- Department of Theoretical and Applied Sciences (DiSTA), University of Insubria, Via J.H. Dunant 3, 21100, Varese, Italy
| | - Partha Pratim Roy
- Department of Pharmacy, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, 495009, India.
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4
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Roopashri AN, Makam R. Development of Operating Process for Continuous Production of Biomass by Tetradesmus obliquus (MT188616.1) in a Hollow Fiber Membrane Photobioreactor. J Biotechnol 2022; 359:59-64. [PMID: 36181923 DOI: 10.1016/j.jbiotec.2022.09.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 09/26/2022] [Indexed: 11/24/2022]
Abstract
An effective prototype of photobioreactor namely hollow fiber membrane bioreactor is employed to produce algal biomass for biofuel production. The effect of two-stage cultivation system on the biomass productivity and lipid production is studied using freshwater green microalga Tetradesmus obliquus MT188616.1. The hybrid system combines exponential biomass production in hollow fiber membrane photobioreactor (HFMPBr) and a coordinated high-lipid stimulation phase in nitrogen-deprived medium by the shake flask method. This work is proposed to examine the usefulness of HFMPBr module to enhance the microalgal growth rate through the effective mass transfer by standardizing the culture medium re-circulation flow rates (5 - 45mL/min) through the hollow fiber membranes. Cultivation is carried out at continuous mode in HFMPBr containing polysulfone fabricated membranes at fixed light intensity of 50 µmol m-2 s-1 and temperature at 28°C. Biomass productivity and specific growth rate obtained are 0.44gL-1d-1 and 1.61µ d-1 with a lipid yield of 0.1g/L. The key operating parameter i.e., liquid flow rate is optimized based on biomass production. The highest biomass concentration is produced at the flow rate of 45mLmin-1. The results showed that HFMPBr module is a better choice for the algal-cultivation to obtain higher biomass yield.
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Affiliation(s)
- Arekal N Roopashri
- Bangalore University - Department of Microbiology, Biotechnology and Food technology, JB Campus, Bengaluru - 560056, Karnataka state, India.
| | - Roshan Makam
- PES University - Centre for Sustainable Green Energy, Department of Biotechnology, Bengaluru - 560085, Karnataka state, India
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Zhang Z, Chang Y, Wen M, Zhao H, Chen X, Tian G, Liu G, Cai J, Jia G. Rapid detoxification of
Jatropha curcas
cake by fermentation with a combination of three microbial strains and characterization of their metabolic profiles. J Appl Microbiol 2022; 133:743-757. [DOI: 10.1111/jam.15606] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 04/21/2022] [Accepted: 04/27/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Zhenyu Zhang
- Animal Nutrition Institute Sichuan Agricultural University Chengdu China
- Institute of Animal Husbandry and Veterinary Medicine Meishan Vocational Technical College Meishan China
| | - Yaqi Chang
- Animal Nutrition Institute Sichuan Agricultural University Chengdu China
| | - Min Wen
- Institute of Agriculture, Forestry and Food Engineering Yibin University Yibin China
| | - Hua Zhao
- Animal Nutrition Institute Sichuan Agricultural University Chengdu China
| | - Xiaoling Chen
- Animal Nutrition Institute Sichuan Agricultural University Chengdu China
| | - Gang Tian
- Animal Nutrition Institute Sichuan Agricultural University Chengdu China
| | - Guangmang Liu
- Animal Nutrition Institute Sichuan Agricultural University Chengdu China
| | - Jingyi Cai
- Animal Nutrition Institute Sichuan Agricultural University Chengdu China
| | - Gang Jia
- Animal Nutrition Institute Sichuan Agricultural University Chengdu China
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6
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Hernández H, Nunes MC, Prista C, Raymundo A. Innovative and Healthier Dairy Products through the Addition of Microalgae: A Review. Foods 2022; 11:foods11050755. [PMID: 35267388 PMCID: PMC8909392 DOI: 10.3390/foods11050755] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/28/2022] [Accepted: 03/02/2022] [Indexed: 02/04/2023] Open
Abstract
In recent years, the development of healthier foods, richer in nutraceutical or functional compounds, has been in great demand. Microalgae are attracting increasing attention, as their incorporation in foods and beverages can be a promising strategy to develop sustainable foods with improved nutritional profiles and a strong positive impacts on health. Despite the increasing market demand in plant-based foods, the popularity of fermented dairy foods has increased in the recent years since they are a source of microorganisms with health-promoting effects. In this context, the incorporation of microalgae in cheeses, fermented milks and other dairy products represents an interesting approach towards the development of innovative and added-value hybrid products based on animal proteins and enriched with vegetable origin ingredients recognized as extremely valuable sources of bioactive compounds. The effect of the addition of microalgal biomass (Chlorella vulgaris, Arthrospira platensis, Pavlova lutheri, and Diacronema vlkianum, among others) and its derivates on the physicochemical composition, colorimetric and antioxidant properties, texture and rheology behavior, sensory profile, and viability of starter cultures and probiotics in yogurt, cheese and ice cream is discussed in the current work. This review of the literature on the incorporation of microalgae in dairy products aims to contribute to a better understanding of the potential use of these unique food ingredients in the development of new sustainable products and of their beneficial effects on health. Considering the importance of commercialization, regulatory issues about the use of microalgae in dairy products are also discussed.
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7
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Ye Y, Ngo HH, Guo W, Chang SW, Nguyen DD, Varjani S, Liu Q, Bui XT, Hoang NB. Bio-membrane integrated systems for nitrogen recovery from wastewater in circular bioeconomy. CHEMOSPHERE 2022; 289:133175. [PMID: 34875297 DOI: 10.1016/j.chemosphere.2021.133175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 11/24/2021] [Accepted: 12/02/2021] [Indexed: 06/13/2023]
Abstract
Wastewater contains a significant amount of recoverable nitrogen. Hence, the recovery of nitrogen from wastewater can provide an option for generating some revenue by applying the captured nitrogen to producing bio-products, in order to minimize dangerous or environmental pollution consequences. The circular bio-economy can achieve greater environmental and economic sustainability through game-changing technological developments that will improve municipal wastewater management, where simultaneous nitrogen and energy recovery are required. Over the last decade, substantial efforts were undertaken concerning the recovery of nitrogen from wastewater. For example, bio-membrane integrated system (BMIS) which integrates biological process and membrane technology, has attracted considerable attention for recovering nitrogen from wastewater. In this review, current research on nitrogen recovery using the BMIS are compiled whilst the technologies are compared regarding their energy requirement, efficiencies, advantages and disadvantages. Moreover, the bio-products achieved in the nitrogen recovery system processes are summarized in this paper, and the directions for future research are suggested. Future research should consider the quality of recovered nitrogenous products, long-term performance of BMIS and economic feasibility of large-scale reactors. Nitrogen recovery should be addressed under the framework of a circular bio-economy.
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Affiliation(s)
- Yuanyao Ye
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan, 430074, PR China
| | - Huu Hao Ngo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia; NTT Institute of Hi-Technology, Nguyen Tat Thanh University, Ho Chi Minh City, Viet Nam.
| | - Wenshan Guo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Soon Woong Chang
- Department of Environmental Energy Engineering, Kyonggi University, 442-760, Republic of Korea
| | - Dinh Duc Nguyen
- Department of Environmental Energy Engineering, Kyonggi University, 442-760, Republic of Korea
| | - Sunita Varjani
- Gujarat Pollution Control Board, Gandhinagar, Gujarat, 382 010, India
| | - Qiang Liu
- School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Road, Shanghai, 200444, PR China.
| | - Xuan Thanh Bui
- Key Laboratory of Advanced Waste Treatment Technology & Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology (HCMUT), Vietnam National University Ho Chi Minh (VNU-HCM), Ho Chi Minh City, 700000, Viet Nam
| | - Ngoc Bich Hoang
- NTT Institute of Hi-Technology, Nguyen Tat Thanh University, Ho Chi Minh City, Viet Nam
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8
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Brar A, Kumar M, Soni T, Vivekanand V, Pareek N. Insights into the genetic and metabolic engineering approaches to enhance the competence of microalgae as biofuel resource: A review. BIORESOURCE TECHNOLOGY 2021; 339:125597. [PMID: 34315089 DOI: 10.1016/j.biortech.2021.125597] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 07/13/2021] [Accepted: 07/14/2021] [Indexed: 06/13/2023]
Abstract
Conventional fuel resources are overburden with speedy global energy demand which ensued the urgent need of alternate energy resources. Biofuel generation efficiency of microalgae is notable due to their comparatively rapid biomass production rate and high oil content. But, the employment of microalgae as biofuel resource is in infancy due to low productivity and high production cost. The issues can be addressed by employing engineered microalgal strains that would be able to efficiently generate enhanced levels of biomass with augmented lipid and/or carbohydrate content for proficient biofuel production. Genetic alterations and metabolic engineering of microalgal species might be helpful in developing high stress-tolerant strains with improved properties for biofuel generation. Various omics approaches appeared significant to upgrade the microalgal lipid production. Intervention of genetic and metabolic engineering approaches would facilitate the development of microalgae as a competent biofuel resource and inflate the economic commercialization of biofuels.
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Affiliation(s)
- Amandeep Brar
- Microbial Catalysis and Process Engineering Laboratory, Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Bandarsindri, Kishangarh, Ajmer, Rajasthan 305817, India
| | - Manish Kumar
- Microbial Catalysis and Process Engineering Laboratory, Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Bandarsindri, Kishangarh, Ajmer, Rajasthan 305817, India
| | - Twinkle Soni
- Microbial Catalysis and Process Engineering Laboratory, Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Bandarsindri, Kishangarh, Ajmer, Rajasthan 305817, India
| | - V Vivekanand
- Centre for Energy and Environment, Malaviya National Institute of Technology, Jaipur, Rajasthan 302017, India
| | - Nidhi Pareek
- Microbial Catalysis and Process Engineering Laboratory, Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Bandarsindri, Kishangarh, Ajmer, Rajasthan 305817, India.
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9
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Abstract
Energy security and climate change have cascading effects on the world's burgeoning population in terms of food security, environment, and sustainability. Due to depletion of fossil fuels and undesirable changes of climatic conditions, increase in air and water pollution, mankind started exploring alternate and sustainable means of meeting growing energy needs. One of the options is to use renewable sources of fuel-biofuel. In this chapter the authors have reviewed and presented sustainability impact on production of biofuels. Authors further reviewed state-of-the-art gene editing technologies toward improvement of biofuel crops. The authors recommend a phased transition from first-generation biofuel, and an acceleration toward use of technology to drive adoption of second-generation biofuels. Key aspects of technology and application of resource management models will enable these crops to bridge the global energy demand before we can completely transition to a more sustainable biofuel economy.
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10
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Morphological plasticity of hyperelongated cells caused by overexpression of translation elongation factor P in Synechococcus elongatus PCC7942. Appl Microbiol Biotechnol 2020; 104:8801-8812. [PMID: 32915258 DOI: 10.1007/s00253-020-10874-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/17/2020] [Accepted: 08/31/2020] [Indexed: 10/23/2022]
Abstract
Translation elongation factors (EFs) are proteins that play important roles during the elongation stage of protein synthesis. In prokaryotes, at least four EFs function in repetitive reactions (EF-Tu, EF-Ts, EF-G, and EF-P). EF-P plays a vital role in the specialized translation of consecutive proline amino acid motifs. It was also recently recognized that EF-P acts throughout translation elongation. Here, we demonstrated for the first time that cell division and morphology are intimately linked to the control of EF-P in the model cyanobacterium Synechococcus elongatus PCC7942. We constructed the overexpression of a wild-type gene product for EF-P (Synpcc7942_2565) as a tool to identify EF-P functionality. The overexpression of EF-P resulted in the morphological plasticity of hyperelongated cells. During the stationary phase, EF-P overexpressors displayed cell lengths of 150 μm or longer, approximately 35 times longer than the control. Total cellular protein and amino acid content were also increased in overexpressors. To explore the molecular mechanisms underlying hyperelongation, gene expression analysis was performed. The results revealed that cell division genes, including ftn6, minD, mreB, mreC, and ftsZ, were modulated in overexpressors. Strikingly, ftn6 was severely down-regulated. Little is known regarding EF-P in prokaryotic photosynthetic organisms. Our results suggest that cyanobacterial EF-P participates in the acceleration of protein synthesis and also regulates cell division processes. These findings suggest new ways to modify translation and metabolism in cyanobacteria. Phenotypic and metabolic alterations caused by overexpressing EF-P may also be beneficial for applications such as low-cost, green molecular factories. KEY POINTS: • Cell division and cell morphology in the cyanobacterium Synechococcus elongatus PCC7942 are closely linked with the control of translation elongation factor P (EF-P). • Overexpression of EF-P leads to morphological plasticity in hyperelongated cells. • Cyanobacterial EF-P is involved in the acceleration of protein synthesis and the regulation of cell division processes.
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11
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Wei C, Wang H, Ma M, Hu Q, Gong Y. Factors Affecting the Mixotrophic Flagellate Poterioochromonas malhamensis Grazing on Chlorella Cells. J Eukaryot Microbiol 2019; 67:190-202. [PMID: 31674079 DOI: 10.1111/jeu.12770] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 09/29/2019] [Accepted: 10/16/2019] [Indexed: 01/27/2023]
Abstract
Grazing behaviour between protozoa and phytoplankton exists widely in planktonic ecosystems. Poterioochromonas malhamensis is a well-known and widespread mixotrophic flagellate, which is recognized to play an important role within marine and freshwater planktonic ecosystems and regarded as the greatest contamination threat for mass algal cultures of Chlorella. In this study, a comprehensive range of factors, including morphological characters, biochemical compositions, and specific growth rate of ten species or strains of Chlorella, were evaluated for their effect on the feeding ability of P. malhamensis, which was assessed by two parameters: the clearance rate of P. malhamensis on Chlorella spp. and the specific growth rate of P. malhamensis. The results showed that the clearance rate of P. malhamensis was negatively correlated with cell wall thickness and specific growth rate of Chlorella spp., while the specific growth rate of P. malhamensis was positively correlated with carbohydrate percentage and C/N ratio and negatively correlated with protein, lipid percentage, and nitrogen mass. In conclusion, the factors influencing feeding selectivity include not only the morphological character and chemical composition of Chlorella, but also its population dynamics. Our study provides useful insights into the key factors that affect the feeding selectivity of P. malhamensis and provides basic and constructive data to help in screening for grazing-resistant microalgae.
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Affiliation(s)
- Chaojun Wei
- Center for Microalgal Biotechnology and Biofuels, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.,Key Laboratory for Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Hongxia Wang
- Center for Microalgal Biotechnology and Biofuels, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.,Key Laboratory for Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Mingyang Ma
- Center for Microalgal Biotechnology and Biofuels, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.,Key Laboratory for Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Qiang Hu
- Center for Microalgal Biotechnology and Biofuels, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.,Key Laboratory for Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.,State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.,SDIC Microalgae Biotechnology Center, SDIC Biotech Investment Co., LTD., Beijing, 065200, China.,Beijing Key Laboratory of Algae Biomass, Beijing, 100142, China
| | - Yingchun Gong
- Center for Microalgal Biotechnology and Biofuels, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.,Key Laboratory for Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
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12
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Atikij T, Syaputri Y, Iwahashi H, Praneenararat T, Sirisattha S, Kageyama H, Waditee-Sirisattha R. Enhanced Lipid Production and Molecular Dynamics under Salinity Stress in Green Microalga Chlamydomonas reinhardtii (137C). Mar Drugs 2019; 17:md17080484. [PMID: 31434347 PMCID: PMC6722929 DOI: 10.3390/md17080484] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 08/15/2019] [Accepted: 08/18/2019] [Indexed: 12/22/2022] Open
Abstract
Microalgal lipids are a source of valuable nutritional ingredients in biotechnological industries, and are precursors to biodiesel production. Here, the effects of salt-induced stresses, including NaCl, KCl, and LiCl stresses, on the production of lipid in green microalga Chlamydomonas reinhardtii (137c) were investigated. NaCl stress dramatically increased saturated fatty acids (SFAs), which accounted for 70.2% of the fatty acid methyl ester (FAMEs) under stress. In contrary, KCl stress led to a slight increase in SFAs (47.05%) with the remaining being polyunsaturated fatty acids (PUFAs) (45.77%). RT-PCR analysis revealed that the genes involved in FA biosynthesis, such as PDH2, ACCase, MAT and KAS2, were up-regulated by NaCl-induced stress. Conversely, the genes responsible for the Kennedy pathway were suppressed. The alteration of FA homeostasis was further assessed by overexpressing MAT, the enzyme responsible for the production of malonyl-ACP, a key building block for FA biosynthesis, in the cyanobacterium Synechococcus elongatus PCC 7942. Intracellular FA composition was affected, with a predominant synthesis of SFAs in transformed cells. Owing to the diversity and relative abundance of SFAs, monounsaturated fatty acid (MUFAs) and PUFAs enable the feasibility of using microorganisms as a source of microalgal lipids or valuable nutritional ingredients; salt-induced stress and expression of MAT are useful in providing precursors for enhanced lipid production.
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Affiliation(s)
- Thanapa Atikij
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Phayathai Rd., Pathumwan, Bangkok 10330, Thailand
- The Chemical Approaches for Food Applications Research Group, Faculty of Science, Chulalongkorn University, Phayathai Rd., Pathumwan, Bangkok 10330, Thailand
| | - Yolani Syaputri
- Graduate School of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Hitoshi Iwahashi
- Graduate School of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Thanit Praneenararat
- The Chemical Approaches for Food Applications Research Group, Faculty of Science, Chulalongkorn University, Phayathai Rd., Pathumwan, Bangkok 10330, Thailand
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Rd., Pathumwan, Bangkok 10330, Thailand
| | - Sophon Sirisattha
- Thailand Institute of Scientific and Technological Research (TISTR), Khlong Luang, Pathum Thani 12120, Thailand
| | - Hakuto Kageyama
- Graduate School of Environmental and Human Sciences, Meijo University, Nagoya 468-8502, Japan.
| | - Rungaroon Waditee-Sirisattha
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Phayathai Rd., Pathumwan, Bangkok 10330, Thailand.
- The Chemical Approaches for Food Applications Research Group, Faculty of Science, Chulalongkorn University, Phayathai Rd., Pathumwan, Bangkok 10330, Thailand.
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Das P, Thaher M, AbdulQuadir M, Khan S, Chaudhary A, Al-Jabri H. Long-term semi-continuous cultivation of a halo-tolerant Tetraselmis sp. using recycled growth media. BIORESOURCE TECHNOLOGY 2019; 276:35-41. [PMID: 30611084 DOI: 10.1016/j.biortech.2018.12.108] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 12/27/2018] [Accepted: 12/28/2018] [Indexed: 06/09/2023]
Abstract
In this study, a halotolerant Tetraselmis sp. was selected for 11-month outdoor semi-continuous cultivation in one sq. m raceway tank in the Qatari desert. A fraction of the culture was harvested using ferric chloride, and the growth media was returned to the tank. The recycling of culture media continued till the culture salinity reached 8% NaCl; 90% culture was then harvested, and the remaining culture fraction was used as inoculum for a new cultivation cycle. The growth of Tetraselmis sp. was not affected by incremental salinity although the intracellular metabolites varied; the average biomass productivity was 17.8 g/m2/d. Harvesting efficiency was slightly affected by the increase in salinity. Iron content in the harvested biomass was in the range of 1.5-3.3%, and acidic solution (pH = 1.48) was able to recover 91.3% iron from the harvested biomass. Nonetheless, Tetraselmis sp. could be grown continuously throughout the year in Qatar's climate condition.
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Affiliation(s)
- Probir Das
- Algal Technology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, Doha 2713, Qatar.
| | - Mahmoud Thaher
- Algal Technology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, Doha 2713, Qatar
| | - Mohammed AbdulQuadir
- Algal Technology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, Doha 2713, Qatar
| | - Shoyeb Khan
- Algal Technology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, Doha 2713, Qatar
| | - Afeefa Chaudhary
- Algal Technology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, Doha 2713, Qatar
| | - Hareb Al-Jabri
- Algal Technology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, Doha 2713, Qatar
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Arora N, Kumari P, Kumar A, Gangwar R, Gulati K, Pruthi PA, Prasad R, Kumar D, Pruthi V, Poluri KM. Delineating the molecular responses of a halotolerant microalga using integrated omics approach to identify genetic engineering targets for enhanced TAG production. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:2. [PMID: 30622644 PMCID: PMC6318984 DOI: 10.1186/s13068-018-1343-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 12/17/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Harnessing the halotolerant characteristics of microalgae provides a viable alternative for sustainable biomass and triacylglyceride (TAG) production. Scenedesmus sp. IITRIND2 is a fast growing fresh water microalga that has the capability to thrive in high saline environments. To understand the microalga's adaptability, we studied its physiological and metabolic flexibility by studying differential protein, metabolite and lipid expression profiles using metabolomics, proteomics, real-time polymerase chain reaction, and lipidomics under high salinity conditions. RESULTS On exposure to salinity, the microalga rewired its cellular reserves and ultrastructure, restricted the ions channels, and modulated its surface potential along with secretion of extrapolysaccharide to maintain homeostasis and resolve the cellular damage. The algal-omics studies suggested a well-organized salinity-driven metabolic adjustment by the microalga starting from increasing the negatively charged lipids, up regulation of proline and sugars accumulation, followed by direction of carbon and energy flux towards TAG synthesis. Furthermore, the omics studies indicated both de-novo and lipid cycling pathways at work for increasing the overall TAG accumulation inside the microalgal cells. CONCLUSION The salt response observed here is unique and is different from the well-known halotolerant microalga; Dunaliella salina, implying diversity in algal response with species. Based on the integrated algal-omics studies, four potential genetic targets belonging to two different metabolic pathways (salt tolerance and lipid production) were identified, which can be further tested in non-halotolerant algal strains.
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Affiliation(s)
- Neha Arora
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667 India
| | - Poonam Kumari
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667 India
| | - Amit Kumar
- Centre of Biomedical Research, SGPGIMS, Lucknow, Uttar Pradesh 226014 India
| | - Rashmi Gangwar
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667 India
| | - Khushboo Gulati
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667 India
| | - Parul A. Pruthi
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667 India
| | - Ramasare Prasad
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667 India
| | - Dinesh Kumar
- Centre of Biomedical Research, SGPGIMS, Lucknow, Uttar Pradesh 226014 India
| | - Vikas Pruthi
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667 India
- Centre for Transportation Systems, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667 India
| | - Krishna Mohan Poluri
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667 India
- Centre for Transportation Systems, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667 India
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Abstract
The rapid depletion and environmental concerns associated with the use of fossil fuels has led to extensive development of biofuels such as bioethanol from seaweeds. The long-term prospect of seaweed bioethanol production however, depends on the selection of processes in the hydrolysis and fermentation stages due to their limiting effect on ethanol yield. This review explored the factors influencing the hydrolysis and fermentation stages of seaweed bioethanol production with emphasis on process efficiency and sustainable application. Seaweed carbohydrate contents which are most critical for ethanol production substrate selection were 52 ± 6%, 55 ± 12% and 57 ± 13% for green, brown and red seaweeds, respectively. Inhibitor formation and polysaccharide selectivity were found to be the major bottlenecks influencing the efficiency of dilute acid and enzymatic hydrolysis, respectively. Current enzyme preparations used, were developed for starch-based and lignocellulosic biomass but not seaweeds, which differs in polysaccharide composition and structure. Also, the identification of fermenting organisms capable of converting the heterogeneous monomeric sugars in seaweeds is the major factor limiting ethanol yield during the fermentation stage and not the SHF or SSF pathway selection. This has resulted in variations in bioethanol yields, ranging from 0.04 g/g DM to 0.43 g/g DM.
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16
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Liang Y, Zhu Y, Dou M, Xu K, Chu RK, Chrisler WB, Zhao R, Hixson KK, Kelly RT. Spatially Resolved Proteome Profiling of <200 Cells from Tomato Fruit Pericarp by Integrating Laser-Capture Microdissection with Nanodroplet Sample Preparation. Anal Chem 2018; 90:11106-11114. [PMID: 30118597 DOI: 10.1021/acs.analchem.8b03005] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Due to sensitivity limitations, global proteome measurements generally require large amounts of biological starting material, which masks heterogeneity within the samples and differential protein expression among constituent cell types. Methods for spatially resolved proteomics are being developed to resolve protein expression for distinct cell types among highly heterogeneous tissues, but have primarily been applied to mammalian systems. Here we evaluate the performance of cell-type-specific proteome analysis of tomato fruit pericarp tissues by a platform integrating laser-capture microdissection (LCM) and a recently developed automated sample preparation system (nanoPOTS, nanodroplet processing in one pot for trace samples). Tomato fruits were cryosectioned prior to LCM and tissues were dissected and captured directly into nanoPOTS chips for processing. Following processing, samples were analyzed by nanoLC-MS/MS. Approximately 1900 unique peptides and 422 proteins were identified on average from ∼0.04 mm2 tissues comprising ∼8-15 parenchyma cells. Spatially resolved proteome analyses were performed using cells of outer epidermis, collenchyma, and parenchyma. Using ≤200 cells, a total of 1,870 protein groups were identified and the various tissues were easily resolved. The results provide spatial and tissue-specific insights into key enzymes and pathways involved in carbohydrate transport and source-sink relationships in tomato fruit. Of note, at the time of fruit ripening studied here, we identified differentially abundant proteins throughout the pericarp related to chlorophyll biogenesis, photosynthesis, and especially transport.
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Affiliation(s)
- Yiran Liang
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Ying Zhu
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Maowei Dou
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Kerui Xu
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Rosalie K Chu
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - William B Chrisler
- Biological Sciences Division , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Rui Zhao
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Kim K Hixson
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Ryan T Kelly
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States.,Department of Chemistry and Biochemistry , Brigham Young University , Provo , Utah 84602 , United States
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Maeda Y, Nojima D, Yoshino T, Tanaka T. Structure and properties of oil bodies in diatoms. Philos Trans R Soc Lond B Biol Sci 2018; 372:rstb.2016.0408. [PMID: 28717018 DOI: 10.1098/rstb.2016.0408] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/30/2017] [Indexed: 01/23/2023] Open
Abstract
Diatoms accumulate triacylglycerols in spherical organelles called oil bodies when exposed to nutrient deprivation conditions. Oil body biology in diatoms has attracted significant attention due to the complexity of the intracellular organelles and the unique combination of genes generated by the evolutionary history of secondary endosymbiosis. The demand for biofuel production has further increased the interest in and importance of a better understanding of oil body biology in diatoms, because it could provide targets for genetic engineering to further enhance their promising lipid accumulation. This review describes recent progress in studies of the structure and properties of diatom oil bodies. Firstly, the general features of diatom oil bodies are described, in particular, their number, size and morphology, as well as the quantity and quality of lipids they contain. Subsequently, the diatom oil body-associated proteins, which were recently discovered through oil body proteomics, are introduced. Then, the metabolic pathways responsible for the biogenesis and degradation of diatom oil bodies are summarized. During biogenesis and degradation, oil bodies interact with other organelles, including chloroplasts, the endoplasmic reticulum and mitochondria, suggesting their dynamic nature in response to environmental changes. Finally, the functions of oil bodies in diatoms are discussed.This article is part of the themed issue 'The peculiar carbon metabolism in diatoms'.
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Affiliation(s)
- Yoshiaki Maeda
- Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Daisuke Nojima
- Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Tomoko Yoshino
- Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Tsuyoshi Tanaka
- Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
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18
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Talebi AF, Tabatabaei M, Aghbashlo M. Recent Patents on Biofuels from Microalgae. ENERGY FROM MICROALGAE 2018. [DOI: 10.1007/978-3-319-69093-3_14] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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19
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Ahmed RA, He M, Aftab RA, Zheng S, Nagi M, Bakri R, Wang C. Bioenergy application of Dunaliella salina SA 134 grown at various salinity levels for lipid production. Sci Rep 2017; 7:8118. [PMID: 28808229 PMCID: PMC5556107 DOI: 10.1038/s41598-017-07540-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 06/29/2017] [Indexed: 01/22/2023] Open
Abstract
The biofuels are receiving considerable attention as a substitute for petro diesel. For microalgae, the cell density or biomass and lipid contents are key components for biodiesel production. This study was conducted to develop favorable culture conditions for Dunaliella salina to maximize its biomass and lipid accumulation. The effect of salinity (0.5 to 2.5 M NaCl) on the cell population, biochemical composition, and lipid output of Dunaliella salina was examined under a controlled environment for 21 days. Maximum growth (6.57 × 107 to 7.17 × 107cells mL-1) potentials were observed at 1.5 to 2 M NaCl. The photosynthetic pigments and carbohydrates also showed trends similar to growth. The maximum carotenoid level (5.16 mg L-1) was recorded at 2 M NaCl. Almost all physicochemical parameters increased with increases in salinity, biomass (1231.66 ± 1.26 mg L-1) and lipid content (248.33 mg L-1), as recorded at 2 M NaCl. Based on fluorescence intensity, the highest values (11.84 × 107cells/ml) of neutral lipids and total lipids (22.28%) were recorded at optimum salinity levels. The present study suggests that a high biomass and lipid accumulation of Dunaliella salina SA 134 could be obtained at the 2 M NaCl level.
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Affiliation(s)
- Rajper Aftab Ahmed
- Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Meilin He
- Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Rajper Asma Aftab
- Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shiyan Zheng
- Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Mostafa Nagi
- Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ramadan Bakri
- Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Changhai Wang
- Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China.
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20
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Saratale RG, Kuppam C, Mudhoo A, Saratale GD, Periyasamy S, Zhen G, Koók L, Bakonyi P, Nemestóthy N, Kumar G. Bioelectrochemical systems using microalgae - A concise research update. CHEMOSPHERE 2017; 177:35-43. [PMID: 28284115 DOI: 10.1016/j.chemosphere.2017.02.132] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2016] [Revised: 02/22/2017] [Accepted: 02/25/2017] [Indexed: 06/06/2023]
Abstract
Excess consumption of energy by humans is compounded by environmental pollution, the greenhouse effect and climate change impacts. Current developments in the use of algae for bioenergy production offer several advantages. Algal biomass is hence considered a new bio-material which holds the promise to fulfil the rising demand for energy. Microalgae are used in effluents treatment, bioenergy production, high value added products synthesis and CO2 capture. This review summarizes the potential applications of algae in bioelectrochemically mediated oxidation reactions in fully biotic microbial fuel cells for power generation and removal of unwanted nutrients. In addition, this review highlights the recent developments directed towards developing different types of microalgae MFCs. The different process factors affecting the performance of microalgae MFC system and some technological bottlenecks are also addressed.
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Affiliation(s)
- Rijuta Ganesh Saratale
- Research Institute of Biotechnology and Medical Converged Science, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyeonggi-do, 10326, Republic of Korea
| | - Chandrasekar Kuppam
- School of Applied Biosciences, Kyungpook National University, Daegu, 702-701, Republic of Korea
| | - Ackmez Mudhoo
- Department of Chemical & Environmental Engineering, Faculty of Engineering, University of Mauritius, Réduit, 80837, Mauritius
| | - Ganesh Dattatraya Saratale
- Department of Food Science and Biotechnology, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyeonggi-do, 10326, Republic of Korea
| | - Sivagurunathan Periyasamy
- Center for Materials Cycles and Waste Management Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - Guangyin Zhen
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Dongchuan Rd. 500, Shanghai, 200241, China
| | - László Koók
- Research Institute on Bioengineering, Membrane Technology and Energetics, University of Pannonia, Egyetem ut 10, 8200, Veszprém, Hungary
| | - Péter Bakonyi
- Research Institute on Bioengineering, Membrane Technology and Energetics, University of Pannonia, Egyetem ut 10, 8200, Veszprém, Hungary
| | - Nándor Nemestóthy
- Research Institute on Bioengineering, Membrane Technology and Energetics, University of Pannonia, Egyetem ut 10, 8200, Veszprém, Hungary
| | - Gopalakrishnan Kumar
- Sustainable Management of Natural Resources and Environment Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam.
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21
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Garnier M, Bougaran G, Pavlovic M, Berard JB, Carrier G, Charrier A, Le Grand F, Lukomska E, Rouxel C, Schreiber N, Cadoret JP, Rogniaux H, Saint-Jean B. Use of a lipid rich strain reveals mechanisms of nitrogen limitation and carbon partitioning in the haptophyte Tisochrysis lutea. ALGAL RES 2016. [DOI: 10.1016/j.algal.2016.10.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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22
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Johnson TJ, Gibbons JL, Gu L, Zhou R, Gibbons WR. Molecular genetic improvements of cyanobacteria to enhance the industrial potential of the microbe: A review. Biotechnol Prog 2016; 32:1357-1371. [DOI: 10.1002/btpr.2358] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Revised: 08/30/2016] [Indexed: 12/17/2022]
Affiliation(s)
- Tylor J. Johnson
- Dept. of Biology and MicrobiologySouth Dakota State UniversityBrookings SD57007
- Dept. of MicrobiologyThe University of TennesseeKnoxville TN37996
| | - Jaimie L. Gibbons
- Dept. of Biology and MicrobiologySouth Dakota State UniversityBrookings SD57007
| | - Liping Gu
- Dept. of Biology and MicrobiologySouth Dakota State UniversityBrookings SD57007
| | - Ruanbao Zhou
- Dept. of Biology and MicrobiologySouth Dakota State UniversityBrookings SD57007
| | - William R. Gibbons
- Dept. of Biology and MicrobiologySouth Dakota State UniversityBrookings SD57007
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Popp J, Harangi-Rákos M, Gabnai Z, Balogh P, Antal G, Bai A. Biofuels and Their Co-Products as Livestock Feed: Global Economic and Environmental Implications. Molecules 2016; 21:285. [PMID: 26938514 PMCID: PMC6273624 DOI: 10.3390/molecules21030285] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 02/03/2016] [Accepted: 02/24/2016] [Indexed: 11/16/2022] Open
Abstract
This review studies biofuel expansion in terms of competition between conventional and advanced biofuels based on bioenergy potential. Production of advanced biofuels is generally more expensive than current biofuels because products are not yet cost competitive. What is overlooked in the discussion about biofuel is the contribution the industry makes to the global animal feed supply and land use for cultivation of feedstocks. The global ethanol industry produces 44 million metric tonnes of high-quality feed, however, the co-products of biodiesel production have a moderate impact on the feed market contributing to just 8-9 million tonnes of protein meal output a year. By economically displacing traditional feed ingredients co-products from biofuel production are an important and valuable component of the biofuels sector and the global feed market. The return of co-products to the feed market has agricultural land use (and GHG emissions) implications as well. The use of co-products generated from grains and oilseeds can reduce net land use by 11% to 40%. The proportion of global cropland used for biofuels is currently some 2% (30-35 million hectares). By adding co-products substituted for grains and oilseeds the land required for cultivation of feedstocks declines to 1.5% of the global crop area.
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Affiliation(s)
- József Popp
- Institute of Sectoral Economics and Methodology, Faculty of Economics and Business, University of Debrecen, Debrecen 4032, Hungary.
| | - Mónika Harangi-Rákos
- Institute of Sectoral Economics and Methodology, Faculty of Economics and Business, University of Debrecen, Debrecen 4032, Hungary.
| | - Zoltán Gabnai
- Institute of Business Economics, Faculty of Economics and Business, University of Debrecen, Debrecen 4032, Hungary.
| | - Péter Balogh
- Institute of Sectoral Economics and Methodology, Faculty of Economics and Business, University of Debrecen, Debrecen 4032, Hungary.
| | - Gabriella Antal
- Institute of Sectoral Economics and Methodology, Faculty of Economics and Business, University of Debrecen, Debrecen 4032, Hungary.
| | - Attila Bai
- Institute of Business Economics, Faculty of Economics and Business, University of Debrecen, Debrecen 4032, Hungary.
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Jin S, Daniell H. The Engineered Chloroplast Genome Just Got Smarter. TRENDS IN PLANT SCIENCE 2015; 20:622-640. [PMID: 26440432 PMCID: PMC4606472 DOI: 10.1016/j.tplants.2015.07.004] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 06/18/2015] [Accepted: 07/20/2015] [Indexed: 05/18/2023]
Abstract
Chloroplasts are known to sustain life on earth by providing food, fuel, and oxygen through the process of photosynthesis. However, the chloroplast genome has also been smartly engineered to confer valuable agronomic traits and/or serve as bioreactors for the production of industrial enzymes, biopharmaceuticals, bioproducts, or vaccines. The recent breakthrough in hyperexpression of biopharmaceuticals in edible leaves has facilitated progression to clinical studies by major pharmaceutical companies. This review critically evaluates progress in developing new tools to enhance or simplify expression of targeted genes in chloroplasts. These tools hold the promise to further the development of novel fuels and products, enhance the photosynthetic process, and increase our understanding of retrograde signaling and cellular processes.
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Affiliation(s)
- Shuangxia Jin
- Department of Biochemistry, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA; National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China
| | - Henry Daniell
- Department of Biochemistry, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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25
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Sabia A, Baldisserotto C, Biondi S, Marchesini R, Tedeschi P, Maietti A, Giovanardi M, Ferroni L, Pancaldi S. Re-cultivation of Neochloris oleoabundans in exhausted autotrophic and mixotrophic media: the potential role of polyamines and free fatty acids. Appl Microbiol Biotechnol 2015; 99:10597-609. [DOI: 10.1007/s00253-015-6908-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Revised: 07/20/2015] [Accepted: 08/01/2015] [Indexed: 11/28/2022]
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26
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Trumbo JL, Zhang B, Stewart CN. Manipulating microRNAs for improved biomass and biofuels from plant feedstocks. PLANT BIOTECHNOLOGY JOURNAL 2015; 13:337-54. [PMID: 25707745 DOI: 10.1111/pbi.12319] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 11/25/2014] [Accepted: 11/29/2014] [Indexed: 05/22/2023]
Abstract
Petroleum-based fuels are nonrenewable and unsustainable. Renewable sources of energy, such as lignocellulosic biofuels and plant metabolite-based drop-in fuels, can offset fossil fuel use and reverse environmental degradation through carbon sequestration. Despite these benefits, the lignocellulosic biofuels industry still faces many challenges, including the availability of economically viable crop plants. Cell wall recalcitrance is a major economic barrier for lignocellulosic biofuels production from biomass crops. Sustainability and biomass yield are two additional, yet interrelated, foci for biomass crop improvement. Many scientists are searching for solutions to these problems within biomass crop genomes. MicroRNAs (miRNAs) are involved in almost all biological and metabolic process in plants including plant development, cell wall biosynthesis and plant stress responses. Because of the broad functions of their targets (e.g. auxin response factors), the alteration of plant miRNA expression often results in pleiotropic effects. A specific miRNA usually regulates a biologically relevant bioenergy trait. For example, relatively low miR156 overexpression leads to a transgenic feedstock with enhanced biomass and decreased recalcitrance. miRNAs have been overexpressed in dedicated bioenergy feedstocks such as poplar and switchgrass yielding promising results for lignin reduction, increased plant biomass, the timing of flowering and response to harsh environments. In this review, we present the status of miRNA-related research in several major biofuel crops and relevant model plants. We critically assess published research and suggest next steps for miRNA manipulation in feedstocks for increased biomass and sustainability for biofuels and bioproducts.
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Affiliation(s)
- Jennifer Lynn Trumbo
- Bredesen Center for Interdisciplinary Research and Graduate Education, University of Tennessee, Knoxville, TN, USA; Department of Plant Sciences, University of Tennessee, Knoxville, TN, USA
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Kim SH, Ahn HM, Lim SR, Hong SJ, Cho BK, Lee H, Lee CG, Choi HK. Comparative lipidomic profiling of two Dunaliella tertiolecta strains with different growth temperatures under nitrate-deficient conditions. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:880-887. [PMID: 25549757 DOI: 10.1021/jf502967k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The metabolic changes that occur in Dunaliella tertiolecta upon exposure to low temperatures and nitrate deficiency were analyzed by exploring the fatty acid composition and lipid profile of two strains that were acclimated to different temperatures. The results indicate that the levels of linolenic acid (C18:3) and diacylglyceryl-N,N,N-trimethylhomoserine (DGTS) were significantly higher in the low-temperature (15 °C) strain (SCCAP K-0591) than in a strain grown at 21 °C (UTEX LB999). In addition, DGTS accumulated in LB999 under nitrate-deficient conditions, while the levels of most lipids, including DGTS, remained almost consistent in K-0591. The higher levels of DGTS in K-0591 suggest that DGTS could play a role in adaptation to low temperatures and nitrate deficiency in this organism. The results of this research could be applied to the development of new microalgal strains with tolerance of low temperature and nitrate deficiency by metabolic engineering targeted to DGTS species.
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Affiliation(s)
- So-Hyun Kim
- College of Pharmacy, Chung-Ang University , Seoul 156-756, Republic of Korea
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Guarnieri MT. Comparative proteomics lends insight into genotype-specific pathogenicity. Proteomics 2014; 13:2544-5. [PMID: 23925996 DOI: 10.1002/pmic.201300322] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 07/26/2013] [Accepted: 07/31/2013] [Indexed: 12/21/2022]
Abstract
Comparative proteomic analyses have emerged as a powerful tool for the identification of unique biomarkers and mechanisms of pathogenesis. In this issue of Proteomics, Murugaiyan et al. utilize difference gel electrophoresis (DIGE) to examine differential protein expression between nonpathogenic and pathogenic genotypes of Prototheca zopfii, a causative agent in bovine enteritis and mastitis. Their findings provide insights into molecular mechanisms of infection and evolutionary adaptation of pathogenic genotypes, demonstrating the power of comparative proteomic analyses.
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Affiliation(s)
- Michael T Guarnieri
- National Renewable Energy Laboratory, National Bioenergy Center, Golden, CO, USA
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Production of biodiesel from Chlorella sp. enriched with oyster shell extracts. BIOMED RESEARCH INTERNATIONAL 2014; 2014:105728. [PMID: 24696841 PMCID: PMC3947894 DOI: 10.1155/2014/105728] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 01/03/2014] [Accepted: 01/04/2014] [Indexed: 11/24/2022]
Abstract
This study investigated the cultivation of the marine microalga Chlorella sp. without supplying an inorganic carbon source, but instead with enriching the media with extracts of oyster shells pretreated by a high-pressure homogenization process. The pretreated oyster shells were extracted by a weak acid, acetic acid, that typically has harmful effects on cell growth and also poses environmental issues. The concentration of the residual dissolved carbon dioxide in the medium was sufficient to maintain cell growth at 32 ppm and pH 6.5 by only adding 5% (v/v) of oyster shell extracts. Under this condition, the maximum cell density observed was 2.74 g dry wt./L after 27 days of cultivation. The total lipid content was also measured as 18.1 (%, w/w), and this value was lower than the 23.6 (%, w/w) observed under nitrogen deficient conditions or autotrophic conditions. The fatty acid compositions of the lipids were also measured as 10.9% of C16:1 and 16.4% of C18:1 for the major fatty acids, which indicates that the biodiesel from this culture process should be a suitable biofuel. These results suggest that oyster shells, environmental waste from the food industry, can be used as a nutrient and carbon source with seawater, and this reused material should be important for easily scaling up the process for an outdoor culture system.
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Agrawal GK, Job D, Kieselbach T, Barkla BJ, Chen S, Deswal R, Lüthje S, Amalraj RS, Tanou G, Ndimba BK, Cramer R, Weckwerth W, Wienkoop S, Dunn MJ, Kim ST, Fukao Y, Yonekura M, Zolla L, Rohila JS, Waditee-Sirisattha R, Masi A, Wang T, Sarkar A, Agrawal R, Renaut J, Rakwal R. INPPO Actions and Recognition as a Driving Force for Progress in Plant Proteomics: Change of Guard, INPPO Update, and Upcoming Activities. Proteomics 2013. [DOI: 10.1002/pmic.201370174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ganesh Kumar Agrawal
- Research Laboratory for Biotechnology and Biochemistry (RLABB); Kathmandu Nepal
- GRADE Academy Private Limited; Adarsh Nagar Birgunj Nepal
| | - Dominique Job
- CNRS/UCBL/INSA/Bayer CropScience Joint Laboratory; UMR 5240, Bayer CropScience Lyon France
| | | | - Bronwyn J. Barkla
- Instituto de Biotecnologia; Universidad Nacional Autonoma de Mexico; Morelos Mexico
| | - Sixue Chen
- Department of Biology; Interdisciplinary Center for Biotechnology Research (ICBR); Cancer & Genetics Research Complex, University of Florida; Gainesville FL USA
| | - Renu Deswal
- Molecular Plant Physiology and Proteomics Laboratory; Department of Botany; University of Delhi; Delhi India
| | - Sabine Lüthje
- Oxidative Stress and Plant Proteomics Group; University of Hamburg; Biocenter Klein Flottbek Hamburg Germany
| | - Ramesh Sundar Amalraj
- Plant Pathology Section, Sugarcane Breeding Institute; Indian Council of Agricultural Research; Tamil Nadu India
| | - Georgia Tanou
- Faculty of Agriculture; Aristotle University of Thessalonki; Thessaloniki Greece
| | - Bongani Kaiser Ndimba
- Proteomics Research and Services Unit; Agricultural Research Council; Infruitec-Nietvoorbij Campus; Stellenbosch South Africa
- Proteomics Research Group; Department of Biotechnology, University of the Western Cape; Bellville South Africa
| | - Rainer Cramer
- Department of Chemistry; University of Reading; Reading United Kingdom
| | | | | | - Michael J. Dunn
- UCD Conway Institute of Biomolecular and Biomedical Research; School of Medicine and Medical Science; University College Dublin; Dublin Ireland
| | - Sun Tae Kim
- Department of Plant Bioscience; Pusan National University; Miryang South Korea
| | - Yochiro Fukao
- Graduate School of Biological Sciences; Nara Institute of Science and Technology; Ikoma Japan
- Plant Global Educational Project; Nara Institute of Science and Technology; Ikoma Japan
| | - Masami Yonekura
- Laboratory of Molecular Food Functionality; College of Agriculture; Ami Ibaraki Japan
| | - Lello Zolla
- Department of Ecology and Biology; University Tuscia; Piazzale Universita; Viterbo Italy
| | - Jai Singh Rohila
- Department of Biology and Microbiology; South Dakota State University; Brookings SD USA
| | | | | | - Tai Wang
- Key Laboratory of Plant Molecular Physiology; Institute of Botany; Chinese Academy of Sciences; Xiangshan Haidianqu Beijing China
| | - Abhijit Sarkar
- Research Laboratory for Biotechnology and Biochemistry (RLABB); Kathmandu Nepal
- GRADE Academy Private Limited; Adarsh Nagar Birgunj Nepal
- International Plant Proteomics Organization (INPPO www.inppo.com)
- Institute of Genetic Medicine and Genomic Science (IGMGS); Badu Kolkata West Bengal India
| | - Raj Agrawal
- International Plant Proteomics Organization (INPPO www.inppo.com)
| | - Jenny Renaut
- Centre de Recherche Public-Gabriel Lippman; Department of Environment and Agrobiotechnologies (EVA); Belvaux GD Luxembourg
| | - Randeep Rakwal
- Research Laboratory for Biotechnology and Biochemistry (RLABB); Kathmandu Nepal
- GRADE Academy Private Limited; Adarsh Nagar Birgunj Nepal
- Department of Anatomy I; School of Medicine; Showa University; Shinagawa Tokyo Japan
- Organization for Educational Initiatives; University of Tsukuba; Tsukuba Japan
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Vlachakis D, Pavlopoulou A, Kazazi D, Kossida S. Unraveling microalgal molecular interactions using evolutionary and structural bioinformatics. Gene 2013; 528:109-19. [PMID: 23900196 DOI: 10.1016/j.gene.2013.07.039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Revised: 07/08/2013] [Accepted: 07/18/2013] [Indexed: 10/26/2022]
Abstract
Microalgae are unicellular microorganisms indispensible for environmental stability and life on earth, because they produce approximately half of the atmospheric oxygen, with simultaneously feeding on the harmful greenhouse gas carbon dioxide. Using gene fusion analysis, a series of five fusion/fission events was identified, that provided the basis for critical insights to their evolutionary history. Moreover, the three-dimensional structures of both the fused and the component proteins were predicted, allowing us to envisage putative protein-protein interactions that are invaluable for the efficient usage, handling and exploitation of microalgae. Collectively, our proposed approach on the five fusion/fission alga protein events contributes towards the expansion of the microalgae knowledgebase, bridging protein evolution of the ancient microalgal species and the rapidly evolving, modern, bioinformatics field.
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Affiliation(s)
- Dimitrios Vlachakis
- Bioinformatics & Medical Informatics Team, Biomedical Research Foundation, Academy of Athens, Soranou Efessiou 4, Athens 11527, Greece
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