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Liu X, Li X, Xie Z, Zhou X, Chen L, Qiu C, Lu C, Jin Z, Long J. Co-immobilization of β-agarase and α-agarase for degradation of agarose to prepare bioactive 3,6-anhydro- L-galactose. Int J Biol Macromol 2024; 277:133960. [PMID: 39029832 DOI: 10.1016/j.ijbiomac.2024.133960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 05/29/2024] [Accepted: 07/16/2024] [Indexed: 07/21/2024]
Abstract
Agarose from biomass can be used to synthesize the rare sugar 3,6-anhydro-L-galactose (L-AHG), and the new synthesis route and functional properties of L-AHG have always been the focus of research. Here we developed a novel method to co-immobilize Aga50D and BpGH117 onto streptavidin-coated magnetic nanoparticles and achieved the conversion of agarose to bioactive L-AHG in one pot. Results showed that enzymes were successfully immobilized on the carrier. The activity of co-immobilized enzymes was 2.5-fold higher than that of single immobilized enzymes. Compared with free enzymes, co-immobilized enzymes exhibited enhanced thermal stability. The co-immobilized enzymes retained 79.45 % relative activity at 40 °C for 3 h, while the free enzymes only possessed 21.40 % residual activity. After eight cycles, the co-immobilized enzymes still retained 73.47 % of the initial activity. After silica gel chromatography, the purity of L-AHG obtained by co-immobilized enzymes hydrolysis reached 83.02 %. Furthermore, bioactivity experiments demonstrated that L-AHG displayed better antioxidant and antibacterial effects than neoagarobiose. L-AHG had broad-spectrum antibacterial activity, while neoagarobiose and D-galactose did not show an obvious antibacterial effect. This study provides a feasible method for the production of L-AHG by a co-immobilized multi-enzyme system and confirms that L-AHG plays a key role in the bioactivity of neoagarobiose.
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Affiliation(s)
- Xuewu Liu
- The State Key Laboratory of Food Science and Resources, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Xingfei Li
- The State Key Laboratory of Food Science and Resources, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Zhengjun Xie
- The State Key Laboratory of Food Science and Resources, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Xing Zhou
- The State Key Laboratory of Food Science and Resources, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | - Long Chen
- The State Key Laboratory of Food Science and Resources, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | - Chao Qiu
- The State Key Laboratory of Food Science and Resources, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | - Cheng Lu
- The State Key Laboratory of Food Science and Resources, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; School of Bioengineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | - Zhengyu Jin
- The State Key Laboratory of Food Science and Resources, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Jie Long
- The State Key Laboratory of Food Science and Resources, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China.
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2
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Kim DH, Cha J, Woo Park G, Soo Kang I, Lee E, Hoon Jung Y, Min K. Biotechnological valorization of levulinic acid as a non-sugar feedstock: New paradigm in biorefineries. BIORESOURCE TECHNOLOGY 2024; 408:131178. [PMID: 39084536 DOI: 10.1016/j.biortech.2024.131178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 06/25/2024] [Accepted: 07/28/2024] [Indexed: 08/02/2024]
Abstract
Due to the severe climate crisis, biorefineries have been highlighted as replacements for fossil fuel-derived refineries. In traditional sugar-based biorefineries, levulinic acid (LA) is a byproduct. Nonetheless, in 2002, the US Department of Energy noted that LA is a significant building block obtained from biomass, and the biorefinery paradigm has shifted from being sugar-based to non-sugar-based. Accordingly, LA is of interest in this review since it can be converted into useful precursors and ultimately can broaden the product spectrum toward more valuable products (e.g., fuels, plastics, and pharmaceuticals), thereby enabling the construction of economically viable biorefineries. This study comprehensively reviews LA production techniques utilizing various bioresources. Recent progress in enzymatic and microbial routes for LA valorization and the LA-derived product spectrum and its versatility are discussed. Finally, challenges and future outlooks for LA-based non-sugar biorefineries are suggested.
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Affiliation(s)
- Dong Hyun Kim
- Department of Integrative Biology, Kyuongpook National University, Daegu 41556, Republic of Korea; School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea; Research Institute of Tailored Food Technology, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Jaehyun Cha
- Gwangju Clean Energy Research Center, Korea Institute of Energy Research (KIER), Gwangju 61003, Republic of Korea
| | - Gwon Woo Park
- Gwangju Clean Energy Research Center, Korea Institute of Energy Research (KIER), Gwangju 61003, Republic of Korea
| | - Im Soo Kang
- Department of Integrative Biology, Kyuongpook National University, Daegu 41556, Republic of Korea
| | - Eunjin Lee
- Gwangju Clean Energy Research Center, Korea Institute of Energy Research (KIER), Gwangju 61003, Republic of Korea
| | - Young Hoon Jung
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Kyoungseon Min
- Gwangju Clean Energy Research Center, Korea Institute of Energy Research (KIER), Gwangju 61003, Republic of Korea.
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Wang X, Lu Y, He J, Li X, Xu Y, Ren L, Li H. Untargeted metabolomics reveals the mechanism of amantadine toxicity on Laminaria japonica. Front Physiol 2024; 15:1448259. [PMID: 39113936 PMCID: PMC11303324 DOI: 10.3389/fphys.2024.1448259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Accepted: 07/12/2024] [Indexed: 08/10/2024] Open
Abstract
The antiviral agent amantadine is frequently detected in seawater and marine organisms. Because of increasing concentrations, amantadine has become a contaminant of emerging concern. This compound has toxic effects on the brown algae Laminaria japonica. The effects of amantadine on the biological processes of L. japonica and the corresponding toxic mechanisms remain unclear. In this study, amantadine toxicity on L. japonica was investigated using histopathological and physiological characteristics combined with metabolomics analysis. Changes in metabolites were determined by untargeted metabolomics after exposure to 107 ng/L amantadine for 72 h. The catalase activity in the exposure group slightly increased, whereas the superoxide dismutase activity greatly decreased. An increase in the malondialdehyde concentration was observed after amantadine exposure, which suggested that lipid peroxidation and cell damage occurred. Metabolomics analysis showed that there were 406 differentially expressed metabolites after amantadine exposure. These were mainly phospholipids, amino acids, purines, and their derivatives. Inhibition of the glycerophospholipid metabolism affected the lipid bilayer and cell structure, which was aligned with changes in histological observation. Changes in amino acids led to perturbation of protein synthesis and induced oxidative stress through interference with glutathione metabolism and tyrosine metabolism. Amantadine also interfered with energy metabolism in L. japonica by disturbing the tricarboxylic acid cycle and purine metabolism. The results of this study provide new insights into the mechanism of amantadine toxicity on L. japonica.
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Affiliation(s)
- Xiaohan Wang
- Yantai Key Laboratory of Quality and Safety Control and Deep Processing of Marine Food, Shandong Key Laboratory of Marine Ecological Restoration, Shandong Marine Resource and Environment Research Institute, Yantai, China
| | - Yao Lu
- Yantai Key Laboratory of Quality and Safety Control and Deep Processing of Marine Food, Shandong Key Laboratory of Marine Ecological Restoration, Shandong Marine Resource and Environment Research Institute, Yantai, China
| | - Jinxia He
- Yantai Key Laboratory of Quality and Safety Control and Deep Processing of Marine Food, Shandong Key Laboratory of Marine Ecological Restoration, Shandong Marine Resource and Environment Research Institute, Yantai, China
| | - Xiaojie Li
- Shandong Oriental Ocean Technology Co. Ltd., Yantai, China
| | - Yingjiang Xu
- Yantai Key Laboratory of Quality and Safety Control and Deep Processing of Marine Food, Shandong Key Laboratory of Marine Ecological Restoration, Shandong Marine Resource and Environment Research Institute, Yantai, China
| | - Lihua Ren
- Yantai Key Laboratory of Quality and Safety Control and Deep Processing of Marine Food, Shandong Key Laboratory of Marine Ecological Restoration, Shandong Marine Resource and Environment Research Institute, Yantai, China
| | - Huanjun Li
- Yantai Key Laboratory of Quality and Safety Control and Deep Processing of Marine Food, Shandong Key Laboratory of Marine Ecological Restoration, Shandong Marine Resource and Environment Research Institute, Yantai, China
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4
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Guedes BN, Krambeck K, Durazzo A, Lucarini M, Santini A, Oliveira MBPP, Fathi F, Souto EB. Natural antibiotics against antimicrobial resistance: sources and bioinspired delivery systems. Braz J Microbiol 2024:10.1007/s42770-024-01410-1. [PMID: 38888693 DOI: 10.1007/s42770-024-01410-1] [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: 12/21/2023] [Accepted: 05/29/2024] [Indexed: 06/20/2024] Open
Abstract
The current burden associated to multidrug resistance, and the emerging superbugs, result in a decreased and even loss of antibiotic efficacy, which poses significant challenges in the treatment of infectious diseases. This situation has created a high demand for the discovery of novel antibiotics that are both effective and safe. However, while antibiotics play a crucial role in preventing and treating diseases, they are also associated with adverse effects. The emergence of multidrug-resistant and the extensive appearance of drug-resistant microorganisms, has become one of the major hurdles in healthcare. Addressing this problem will require the development of at least 20 new antibiotics by 2060. However, the process of designing new antibiotics is time-consuming. To overcome the spread of drug-resistant microbes and infections, constant evaluation of innovative methods and new molecules is essential. Research is actively exploring alternative strategies, such as combination therapies, new drug delivery systems, and the repurposing of existing drugs. In addition, advancements in genomic and proteomic technologies are aiding in the identification of potential new drug targets and the discovery of new antibiotic compounds. In this review, we explore new sources of natural antibiotics from plants, algae other sources, and propose innovative bioinspired delivery systems for their use as an approach to promoting responsible antibiotic use and mitigate the spread of drug-resistant microbes and infections.
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Affiliation(s)
- Beatriz N Guedes
- Laboratory of Pharmaceutical Technology, Faculty of Pharmacy, University of Porto, Porto, 4050-313, Portugal
| | - Karolline Krambeck
- Health Sciences School, Guarda Polytechnic Institute, Rua da Cadeia, Guarda, 6300-035, Portugal
| | - Alessandra Durazzo
- CREA-Research Centre for Food and Nutrition, Via Ardeatina 546, Rome, 00178, Italy
| | - Massimo Lucarini
- CREA-Research Centre for Food and Nutrition, Via Ardeatina 546, Rome, 00178, Italy
| | - Antonello Santini
- Department of Pharmacy, University of Napoli Federico II, Via D. Montesano 49, Napoli, 80131, Italy
| | - M Beatriz P P Oliveira
- REQUIMTE/LAQV, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua Jorge Viterbo Ferreira, 280, Porto, 4050-313, Portugal
| | - Faezeh Fathi
- REQUIMTE/LAQV, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua Jorge Viterbo Ferreira, 280, Porto, 4050-313, Portugal.
| | - Eliana B Souto
- Laboratory of Pharmaceutical Technology, Faculty of Pharmacy, University of Porto, Porto, 4050-313, Portugal.
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5
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Gong Y, Shang DD, Sun CL, Du ZJ, Chen GJ. Direct Degradation of Fresh and Dried Macroalgae by Agarivorans albus B2Z047. Mar Drugs 2024; 22:203. [PMID: 38786594 PMCID: PMC11122777 DOI: 10.3390/md22050203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 04/22/2024] [Accepted: 04/26/2024] [Indexed: 05/25/2024] Open
Abstract
Marine macroalgae are increasingly recognized for their significant biological and economic potential. The key to unlocking this potential lies in the efficient degradation of all carbohydrates from the macroalgae biomass. However, a variety of polysaccharides (alginate, cellulose, fucoidan, and laminarin), are difficult to degrade simultaneously in a short time. In this study, the brown alga Saccharina japonica was found to be rapidly and thoroughly degraded by the marine bacterium Agarivorans albus B2Z047. This strain harbors a broad spectrum of carbohydrate-active enzymes capable of degrading various polysaccharides, making it uniquely equipped to efficiently break down both fresh and dried kelp, achieving a hydrolysis rate of up to 52%. A transcriptomic analysis elucidated the presence of pivotal enzyme genes implicated in the degradation pathways of alginate, cellulose, fucoidan, and laminarin. This discovery highlights the bacterium's capability for the efficient and comprehensive conversion of kelp biomass, indicating its significant potential in biotechnological applications for macroalgae resource utilization.
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Affiliation(s)
- Ya Gong
- Marine College, Shandong University, Weihai 264209, China; (Y.G.); (Z.-J.D.)
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao 266237, China
- Weihai Research Institute of Industrial Technology, Shandong University, Weihai 264209, China
| | - Dan-Dan Shang
- Marine College, Shandong University, Weihai 264209, China; (Y.G.); (Z.-J.D.)
| | - Cheng-Lin Sun
- Marine College, Shandong University, Weihai 264209, China; (Y.G.); (Z.-J.D.)
| | - Zong-Jun Du
- Marine College, Shandong University, Weihai 264209, China; (Y.G.); (Z.-J.D.)
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao 266237, China
- Weihai Research Institute of Industrial Technology, Shandong University, Weihai 264209, China
| | - Guan-Jun Chen
- Marine College, Shandong University, Weihai 264209, China; (Y.G.); (Z.-J.D.)
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao 266237, China
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Istianah N, Kang HJ, Lee YJ, Choe D, Jung SK, Hong SC, Jung YH. Enhancing the dispersibility of Gelidium amansii-derived microfibrillated cellulose through centrifugal fractionation. Int J Biol Macromol 2024; 262:129909. [PMID: 38368676 DOI: 10.1016/j.ijbiomac.2024.129909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 12/01/2023] [Accepted: 01/31/2024] [Indexed: 02/20/2024]
Abstract
Hydrothermal pretreatment is useful for microfibrillated cellulose (MFC) preparation due to its safety, but the remaining hemicellulose might affect MFC properties. This study aimed to investigate the effect of centrifugation time on hemicellulose removal and the physicochemical properties of MFC obtained after hydrothermal pretreatment and micro-fibrillation. In this study, centrifugation was applied to the MFC suspension at varying duration times. Composition analysis and Fourier transform infrared spectra indicated that fractionated MFC has no hemicellulose content after 10, 20, and 30 min centrifugation. It also showed an approximately 5 times higher than 0.5 % g/g of initial solid concentration, indicated by a lower gel concentration point, than unfractionated MFC. Scanning electron microscope images of the fractionated MFC for 30 min (MFC2C) presented thin, long cellulose fibrils of 517 nm in average diameter and 635-10,000 nm in length that induced a slower sedimentation rate. MFC2C dispersion was also improved by autoclave sterilization by regulating cellulose structure, rheology, and crystallinity. As a result, MFC dispersibility can be enhanced by removing hemicellulose through simple centrifugation.
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Affiliation(s)
- Nur Istianah
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea; Department of Food Science and Biotechnology, Universitas Brawijaya, Malang 65145, Indonesia
| | - Hye Jee Kang
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Yeon Ju Lee
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Deokyeong Choe
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Sung Keun Jung
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Sung-Chul Hong
- Department of Food Science and Biotechnology, Kunsan National University, Gunsan 54150, Republic of Korea
| | - Young Hoon Jung
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea.
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Nurani W, Anwar Y, Batubara I, Arung ET, Fatriasari W. Kappaphycus alvarezii as a renewable source of kappa-carrageenan and other cosmetic ingredients. Int J Biol Macromol 2024; 260:129458. [PMID: 38232871 DOI: 10.1016/j.ijbiomac.2024.129458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 01/05/2024] [Accepted: 01/11/2024] [Indexed: 01/19/2024]
Abstract
Kappa-carrageenan is one of the most traded marine-derived hydrocolloids used in the food-and-beverage, pharmaceuticals, and personal care/cosmetics industries. K. alvarezii (previously known as Kappaphycus alvarezii) is arguably the most important natural producer based on annual production size and near-homogeneity of the product (i.e., primarily being the kappa-type). The anticipated expansion of the kappa-carrageenan market in the coming years could easily generate >100,000 MT of residual K. alvarezii biomass per year, which, if left untreated, can severely affect the environment and economy of the surrounding area. Among several possible valorization routes, turning the biomass residue into anti-photoaging cosmetic ingredients could potentially be the most sustainable one. Not only optimizing the profit (thus better ensuring economic sustainability) relative to the biofuels- and animal feed-routes, the action could also promote environmental sustainability. It could reduce the dependency of the current cosmetic industry on both petrochemicals and terrestrial plant-derived bioactive compounds. Note how, in contrast to terrestrial agriculture, industrial cultivation of seaweeds does not require arable land, freshwater, fertilizers, and pesticides. The valorization mode could also facilitate the sequestration of more greenhouse gas CO2 as daily-used chemicals, since the aerial productivity of seaweeds is much higher than that of terrestrial plants. This review first summarizes any scientific evidence that K. alvarezii extracts possess anti-photoaging properties. Next, realizing that conventional extraction methods may prevent the use of such extracts in cosmetic formulations, this review discusses the feasibility of obtaining various K. alvarezii compounds using green methods. Lastly, a perspective on several potential challenges to the proposed valorization scheme, as well as the potential solutions, is offered.
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Affiliation(s)
- Wasti Nurani
- Research Center for Biomass and Bioproducts, National Research and Innovation Agency (BRIN), Kawasan KST Soekarno, Jl. Raya Bogor KM 46, Cibinong 16911, Indonesia
| | - Yelfi Anwar
- Research Center for Biomass and Bioproducts, National Research and Innovation Agency (BRIN), Kawasan KST Soekarno, Jl. Raya Bogor KM 46, Cibinong 16911, Indonesia
| | - Irmanida Batubara
- Department of Chemistry, IPB University, Bogor, Indonesia; Tropical Biopharmaca Research Center (TropBRC), Institute of Research and Community Services, IPB University, Bogor, Indonesia
| | - Enos Tangke Arung
- Faculty of Forestry, Universitas Mulawarman, Samarinda, East Kalimantan, Indonesia; Research Collaboration Center for Biomass-Based Nano Cosmetic, in collaboration with National Research and Innovation Agency (BRIN), Samarinda, East Kalimantan, Indonesia
| | - Widya Fatriasari
- Research Center for Biomass and Bioproducts, National Research and Innovation Agency (BRIN), Kawasan KST Soekarno, Jl. Raya Bogor KM 46, Cibinong 16911, Indonesia; Research Collaboration Center for Biomass-Based Nano Cosmetic, in collaboration with National Research and Innovation Agency (BRIN), Samarinda, East Kalimantan, Indonesia; Research Collaboration Center for Marine Biomaterials, Jl. Ir. Sukarno, Jatinangor, Sumedang, Indonesia.
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Liu N, Kivenson V, Peng X, Cui Z, Lankiewicz TS, Gosselin KM, English CJ, Blair EM, O'Malley MA, Valentine DL. Pontiella agarivorans sp. nov., a novel marine anaerobic bacterium capable of degrading macroalgal polysaccharides and fixing nitrogen. Appl Environ Microbiol 2024; 90:e0091423. [PMID: 38265213 PMCID: PMC10880615 DOI: 10.1128/aem.00914-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 12/05/2023] [Indexed: 01/25/2024] Open
Abstract
Marine macroalgae produce abundant and diverse polysaccharides, which contribute substantially to the organic matter exported to the deep ocean. Microbial degradation of these polysaccharides plays an important role in the turnover of macroalgal biomass. Various members of the Planctomycetes-Verrucomicrobia-Chlamydia (PVC) superphylum are degraders of polysaccharides in widespread anoxic environments. In this study, we isolated a novel anaerobic bacterial strain NLcol2T from microbial mats on the surface of marine sediments offshore Santa Barbara, CA, USA. Based on 16S ribosomal RNA (rRNA) gene and phylogenomic analyses, strain NLcol2T represents a novel species within the Pontiella genus in the Kiritimatiellota phylum (within the PVC superphylum). Strain NLcol2T is able to utilize various monosaccharides, disaccharides, and macroalgal polysaccharides such as agar and ɩ-carrageenan. A near-complete genome also revealed an extensive metabolic capacity for anaerobic degradation of sulfated polysaccharides, as evidenced by 202 carbohydrate-active enzymes (CAZymes) and 165 sulfatases. Additionally, its ability of nitrogen fixation was confirmed by nitrogenase activity detected during growth on nitrogen-free medium, and the presence of nitrogenases (nifDKH) encoded in the genome. Based on the physiological and genomic analyses, this strain represents a new species of bacteria that may play an important role in the degradation of macroalgal polysaccharides and with relevance to the biogeochemical cycling of carbon, sulfur, and nitrogen in marine environments. Strain NLcol2T (= DSM 113125T = MCCC 1K08672T) is proposed to be the type strain of a novel species in the Pontiella genus, and the name Pontiella agarivorans sp. nov. is proposed.IMPORTANCEGrowth and intentional burial of marine macroalgae is being considered as a carbon dioxide reduction strategy but elicits concerns as to the fate and impacts of this macroalgal carbon in the ocean. Diverse heterotrophic microbial communities in the ocean specialize in these complex polymers such as carrageenan and fucoidan, for example, members of the Kiritimatiellota phylum. However, only four type strains within the phylum have been cultivated and characterized to date, and there is limited knowledge about the metabolic capabilities and functional roles of related organisms in the environment. The new isolate strain NLcol2T expands the known substrate range of this phylum and further reveals the ability to fix nitrogen during anaerobic growth on macroalgal polysaccharides, thereby informing the issue of macroalgal carbon disposal.
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Affiliation(s)
- Na Liu
- Interdepartmental Graduate Program in Marine Science, University of California Santa Barbara, Santa Barbara, California, USA
| | - Veronika Kivenson
- Interdepartmental Graduate Program in Marine Science, University of California Santa Barbara, Santa Barbara, California, USA
| | - Xuefeng Peng
- Marine Science Institute, University of California Santa Barbara, Santa Barbara, California, USA
| | - Zhisong Cui
- Marine Bioresource and Environment Research Center, Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources of China, Qingdao, China
| | - Thomas S. Lankiewicz
- Department of Chemical Engineering, University of California, Santa Barbara, California, USA
| | - Kelsey M. Gosselin
- Interdepartmental Graduate Program in Marine Science, University of California Santa Barbara, Santa Barbara, California, USA
| | - Chance J. English
- Marine Science Institute, University of California Santa Barbara, Santa Barbara, California, USA
- Department of Ecology Evolution, and Marine Biology, University of California, Santa Barbara, California, USA
| | - Elaina M. Blair
- Department of Chemical Engineering, University of California, Santa Barbara, California, USA
| | - Michelle A. O'Malley
- Department of Chemical Engineering, University of California, Santa Barbara, California, USA
- Biological Engineering Program, University of California, Santa Barbara, California, USA
| | - David L. Valentine
- Marine Science Institute, University of California Santa Barbara, Santa Barbara, California, USA
- Department of Earth Science, University of California Santa Barbara, Santa Barbara, California, USA
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9
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Lee HK, Woo S, Baek D, Min M, Jung GY, Lim HG. Direct and robust citramalate production from brown macroalgae using fast-growing Vibrio sp. dhg. BIORESOURCE TECHNOLOGY 2024; 394:130304. [PMID: 38211713 DOI: 10.1016/j.biortech.2024.130304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 12/29/2023] [Accepted: 01/06/2024] [Indexed: 01/13/2024]
Abstract
Brown macroalgae is a promising feedstock for biorefinery owing to its high biomass productivity and contents of carbohydrates such as alginate and mannitol. However, the limited availability of microbial platforms efficiently catabolizing the brown macroalgae sugars has restricted its utilization. In this study, the direct production of citramalate, an important industrial compound, was demonstrated from brown macroalgae by utilizing Vibrio sp. dhg, which has a remarkably efficient catabolism of alginate and mannitol. Specifically, citramalate synthase from Methanocaldococcus jannaschii was synthetically expressed, and competing pathways were removed to maximally redirect the carbon flux toward citramalate production. Notably, a resulting strain, VXHC, produced citramalate up to 9.8 g/L from a 20 g/L mixture of alginate and mannitol regardless of their ratios. Citramalate was robustly produced even when diverse brown macroalgae were provided directly. Collectively, this study showcased the high potential of brown macroalgae biorefinery using Vibrio sp. dhg.
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Affiliation(s)
- Hye Kyung Lee
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Korea
| | - Sunghwa Woo
- Department of Chemical Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Korea
| | - Dongyeop Baek
- Department of Chemical Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Korea
| | - Myeongwon Min
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Korea
| | - Gyoo Yeol Jung
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Korea; Department of Chemical Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Korea.
| | - Hyun Gyu Lim
- Department of Biological Engineering, Inha University, 100 Inha-Ro, Michuhol-Gu, Incheon 22212, Korea.
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Park SJ, Sharma A, Lee HJ. An Update on the Chemical Constituents and Biological Properties of Selected Species of an Underpinned Genus of Red Algae: Chondrus. Mar Drugs 2024; 22:47. [PMID: 38248672 PMCID: PMC10817618 DOI: 10.3390/md22010047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/10/2024] [Accepted: 01/15/2024] [Indexed: 01/23/2024] Open
Abstract
Macroalgae, particularly red seaweeds, have attracted significant attention due to their economic and health benefits. Chondrus, a red algae genus, despite its economic importance, seems to be undervalued. Among all its species, Chondrus crispus has been meticulously documented for its biological properties, and little is known about other species. No comprehensive review of the biological properties of this genus has been acknowledged. Thus, this review aimed to summarize the available information on the chemical constituents and biological properties of a few selected species, including Chondrus crispus, Chondrus ocellatus, Mazzaella canaliculata, and Chondrus armatus. We compiled and discovered that the genus is offering most of the important health-promoting benefits evidenced from in vitro and in vivo studies focused on antimicrobial, immunomodulation, neuroprotection, anti-atopic, anti-inflammatory, anti-viral, anti-diabetic, cytoprotective, antioxidant, anti-coagulation, nephroprotective, anti-tumor, and anti-venom activity, which speaks about the potential of this genus. Data on clinical studies are limited. Further, around 105 chemical constituents have been reported from Chondrus spp. Given its significance, further investigation is warranted, in the form of meticulously planned cell, animal, and clinical studies that concentrate on novel health-enhancing endeavors, in order to unveil the full potential of this genus. The review also outlines challenges and future directions.
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Affiliation(s)
- Seon-Joo Park
- Department of Food and Nutrition, College of Bionanotechnology, Gachon University, Seongnam-si 13120, Republic of Korea;
- Institute for Aging and Clinical Nutrition Research, Gachon University, Seongnam-si 13120, Republic of Korea
| | - Anshul Sharma
- Department of Food and Nutrition, College of Bionanotechnology, Gachon University, Seongnam-si 13120, Republic of Korea;
- Institute for Aging and Clinical Nutrition Research, Gachon University, Seongnam-si 13120, Republic of Korea
| | - Hae-Jeung Lee
- Department of Food and Nutrition, College of Bionanotechnology, Gachon University, Seongnam-si 13120, Republic of Korea;
- Institute for Aging and Clinical Nutrition Research, Gachon University, Seongnam-si 13120, Republic of Korea
- Department of Health Sciences and Technology, Gachon Advanced Institute for Health Science and Technology (GAIHST), Gachon University, Incheon 21999, Republic of Korea
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11
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Kim M, Oh JW, Jeong DW, Cho BH, Chang J, Shi X, Han SO. Biosynthesis of l-histidine from marine biomass-derived galactans in metabolically engineered Corynebacterium glutamicum. BIORESOURCE TECHNOLOGY 2024; 391:129963. [PMID: 37925085 DOI: 10.1016/j.biortech.2023.129963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 10/30/2023] [Accepted: 10/30/2023] [Indexed: 11/06/2023]
Abstract
l-Histidine plays significant roles in the food and pharmaceutical industries, and its demand has been steadily increasing recently. As demand for l-histidine continues, the development of eco-friendly processes is required. To pursue this goal, D-galactose, a primary component of red algae, was employed as a carbon source for synthesizing l-histidine. To harness this marine biomass, κ-carrageenan was preferentially hydrolyzed to obtain D-galactose using κ-carrageenase (CgkA) and iduronate-2-sulfatase (IdsA3). Subsequently, l-histidine production was enhanced by modifying precursor pathways in Corynebacterium glutamicum. The resulting strain, TDPH6 exhibited a remarkable 2.15-fold increase in l-histidine production compared to TDP. Furthermore, a galactose utilization system was introduced and named TDPH6G2. During fermentation, this strain efficiently consumed 100 % of the D-galactose and synthesized 0.395 g/L of l-histidine. In conclusion, this study presents a sustainable approach to L-histidine synthesis by introducing a galactose utilization system into C. glutamicum.
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Affiliation(s)
- Minhye Kim
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Jun Won Oh
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Da Woon Jeong
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea; Amtixbio CO., LTD., Seoul 01411, Republic of Korea
| | - Byeong-Hyeon Cho
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Joonhee Chang
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Xiaoyu Shi
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Sung Ok Han
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea; Institute of Life Science and Natural Resources, Korea University, Seoul 02841, Republic of Korea.
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12
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Li J, Bergman K, Thomas JBE, Gao Y, Gröndahl F. Life Cycle Assessment of a large commercial kelp farm in Shandong, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 903:166861. [PMID: 37673254 DOI: 10.1016/j.scitotenv.2023.166861] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 09/01/2023] [Accepted: 09/03/2023] [Indexed: 09/08/2023]
Abstract
The environmental benefits of seaweed cultivation have gained a lot of attention, both in policy strategies and by private companies. Sustainability evaluations of seaweed farming have however focused on a very small part of global production of seaweed - on European cultivations at research and pilot-scales although Asia stands for 99 % of global production with China alone producing 60 %. In this study, we use Life Cycle Assessment (LCA) to evaluate the environmental performance of a 400-hectare Chinese kelp farm with a yearly harvest of 60,000 tons. Primary data from the farm was used to assess impacts up until harvest for the functional unit of 1 ton of fresh-weight kelp. Included in the LCA were impact on climate change, acidification terrestrial and marine eutrophication, and use of land water and energy. In addition, we calculated nutrient uptake. Further, we extracted inventory data of four published LCA studies of farmed kelp and recalculated environmental impacts, applying the same background data and method choices with the aim to compare the effects of scale and cultivation system. The results of the hotspot analysis showed that the plastic ropes and buoys dominated impacts on climate change, freshwater and marine eutrophication, and energy consumption. Consequently, the most effective improvement action was recycling after use. The yearly harvest of the Chinese farm was 1000-4000 times larger than previously evaluated farms compared. Results suggest that streamlined and mature production in the large-scale Chinese kelp farm led to lower electricity and fuel consumption compared to small-scale production, thus placing the Chinese farm with a climate impact of 57.5 kg CO2 eq. per ton fresh-weight kelp on the lower end when comparing the carbon footprint. There was a large variation in carbon footprints, which implies that the kelp cultivation sector has considerable room for optimization.
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Affiliation(s)
- Ji Li
- School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China.
| | - Kristina Bergman
- KTH Royal Institute of Technology, Department of Sustainable Development, Environmental Science and Engineering Teknikringen 10B, SE-100 44 Stockholm, Sweden.
| | - Jean-Baptiste E Thomas
- KTH Royal Institute of Technology, Department of Sustainable Development, Environmental Science and Engineering Teknikringen 10B, SE-100 44 Stockholm, Sweden
| | - Yonghui Gao
- School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Fredrik Gröndahl
- KTH Royal Institute of Technology, Department of Sustainable Development, Environmental Science and Engineering Teknikringen 10B, SE-100 44 Stockholm, Sweden
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Rosic N, Thornber C. Biotechnological Potential of Macroalgae during Seasonal Blooms for Sustainable Production of UV-Absorbing Compounds. Mar Drugs 2023; 21:633. [PMID: 38132954 PMCID: PMC10744652 DOI: 10.3390/md21120633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/27/2023] [Accepted: 12/05/2023] [Indexed: 12/23/2023] Open
Abstract
Marine macroalgae (seaweeds) are important primary global producers, with a wide distribution in oceans around the world from polar to tropical regions. Most of these species are exposed to variable environmental conditions, such as abiotic (e.g., light irradiance, temperature variations, nutrient availability, salinity levels) and biotic factors (e.g., grazing and pathogen exposure). As a result, macroalgae developed numerous important strategies to increase their adaptability, including synthesizing secondary metabolites, which have promising biotechnological applications, such as UV-absorbing Mycosporine-Like Amino Acid (MAAs). MAAs are small, water-soluble, UV-absorbing compounds that are commonly found in many marine organisms and are characterized by promising antioxidative, anti-inflammatory and photoprotective properties. However, the widespread use of MAAs by humans is often restricted by their limited bioavailability, limited success in heterologous expression systems, and low quantities recovered from the natural environment. In contrast, bloom-forming macroalgal species from all three major macroalgal clades (Chlorophyta, Phaeophyceae, and Rhodophyta) occasionally form algal blooms, resulting in a rapid increase in algal abundance and high biomass production. This review focuses on the bloom-forming species capable of producing pharmacologically important compounds, including MAAs, and the application of proteomics in facilitating macroalgal use in overcoming current environmental and biotechnological challenges.
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Affiliation(s)
- Nedeljka Rosic
- Faculty of Health, Southern Cross University, Gold Coast, QLD 4225, Australia
- Marine Ecology Research Centre, Southern Cross University, Lismore, NSW 2480, Australia
| | - Carol Thornber
- Department of Natural Resources Science, University of Rhode Island, 120 Flagg Road, Kingston, RI 02881, USA;
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14
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Sun XH, Chen XL, Wang XF, Zhang XR, Sun XM, Sun ML, Zhang XY, Zhang YZ, Zhang YQ, Xu F. Cost-effective production of alginate oligosaccharides from Laminaria japonica roots by Pseudoalteromonas agarivorans A3. Microb Cell Fact 2023; 22:179. [PMID: 37689719 PMCID: PMC10492272 DOI: 10.1186/s12934-023-02170-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 08/07/2023] [Indexed: 09/11/2023] Open
Abstract
BACKGROUND Alginate oligosaccharides (AOs) are the degradation products of alginate, a natural polysaccharide abundant in brown algae. AOs generated by enzymatic hydrolysis have diverse bioactivities and show broad application potentials. AOs production via enzymolysis is now generally with sodium alginate as the raw material, which is chemically extracted from brown algae. In contrast, AOs production by direct degradation of brown algae is more advantageous on account of its cost reduction and is more eco-friendly. However, there have been only a few attempts reported in AOs production from direct degradation of brown algae. RESULTS In this study, an efficient Laminaria japonica-decomposing strain Pseudoalteromonas agarivorans A3 was screened. Based on the secretome and mass spectrum analyses, strain A3 showed the potential as a cell factory for AOs production by secreting alginate lyases to directly degrade L. japonica. By using the L. japonica roots, which are normally discarded in the food industry, as the raw material for both fermentation and enzymatic hydrolysis, AOs were produced by the fermentation broth supernatant of strain A3 after optimization of the alginate lyase production and hydrolysis parameters. The generated AOs mainly ranged from dimers to tetramers, among which trimers and tetramers were predominant. The degradation efficiency of the roots reached 54.58%, the AOs production was 33.11%, and the AOs purity was 85.03%. CONCLUSION An efficient, cost-effective and green process for AOs production directly from the underutilized L. japonica roots by using strain A3 was set up, which differed from the reported processes in terms of the substrate and strain used for fermentation and the AOs composition. This study provides a promising platform for scalable production of AOs, which may have application potentials in industry and agriculture.
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Affiliation(s)
- Xiao-Hui Sun
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao, 266237, China
| | - Xiu-Lan Chen
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao, 266237, China
| | - Xiao-Fei Wang
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao, 266237, China
| | - Xin-Ru Zhang
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao, 266237, China
| | - Xiao-Meng Sun
- Frontiers Science Center for Deep Ocean Multispheres and Earth System & College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China
| | - Mei-Ling Sun
- Frontiers Science Center for Deep Ocean Multispheres and Earth System & College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, 266237, China
| | - Xi-Ying Zhang
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao, 266237, China
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, 266237, China
| | - Yu-Zhong Zhang
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao, 266237, China
- Frontiers Science Center for Deep Ocean Multispheres and Earth System & College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, 266237, China
| | - Yu-Qiang Zhang
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao, 266237, China.
| | - Fei Xu
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao, 266237, China.
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, 266237, China.
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15
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Lee SH, Yun EJ, Han NR, Jung I, Pelton JG, Lee JE, Kang NJ, Jin YS, Kim KH. Production of Ethyl-agarobioside, a Novel Skin Moisturizer, by Mimicking the Alcoholysis from the Japanese Sake-Brewing Process. Mar Drugs 2023; 21:341. [PMID: 37367665 DOI: 10.3390/md21060341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 05/26/2023] [Accepted: 05/30/2023] [Indexed: 06/28/2023] Open
Abstract
Agarobiose (AB; d-galactose-β-1,4-AHG), produced by one-step acid hydrolysis of agarose of red seaweed, is considered a promising cosmetic ingredient due to its skin-moisturizing activity. In this study, the use of AB as a cosmetic ingredient was found to be hampered due to its instability at high temperature and alkaline pH. Therefore, to increase the chemical stability of AB, we devised a novel process to synthesize ethyl-agarobioside (ethyl-AB) from the acid-catalyzed alcoholysis of agarose. This process mimics the generation of ethyl α-glucoside and glyceryl α-glucoside by alcoholysis in the presence of ethanol and glycerol during the traditional Japanese sake-brewing process. Ethyl-AB also showed in vitro skin-moisturizing activity similar to that of AB, but showed higher thermal and pH stability than AB. This is the first report of ethyl-AB, a novel compound produced from red seaweed, as a functional cosmetic ingredient with high chemical stability.
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Affiliation(s)
- Sun-Hee Lee
- Department of Biotechnology, Graduate School, Korea University, Seoul 02841, Republic of Korea
| | - Eun Ju Yun
- Division of Biotechnology, Jeonbuk National University, Iksan 54596, Republic of Korea
| | - Na Ree Han
- Department of Biotechnology, Graduate School, Korea University, Seoul 02841, Republic of Korea
| | - Inho Jung
- Korea Forestry Promotion Institute, Daejeon 34215, Republic of Korea
| | - Jeffrey G Pelton
- QB3 Institute, University of California, Berkeley, CA 94720, USA
| | - Jae-Eun Lee
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Nam Joo Kang
- Department of Biotechnology, The Catholic University of Korea, Bucheon 14662, Republic of Korea
| | - Yong-Su Jin
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Kyoung Heon Kim
- Department of Biotechnology, Graduate School, Korea University, Seoul 02841, Republic of Korea
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16
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A Review of Biohydrogen Production from Saccharina japonica. FERMENTATION-BASEL 2023. [DOI: 10.3390/fermentation9030242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
Saccharina japonica (known as Laminaria japonica or Phaeophyta japonica), one of the largest macroalgae, has been recognized as food and medicine for a long time in some Asian countries, such as China, South Korea, Japan, etc. In recent years, S. japonica has also been considered the most promising third-generation biofuel feedstock to replace fossil fuels, contributing to solving the challenges people face regarding energy and the environment. In particular, S. japonica-derived biohydrogen (H2) is expected to be a major fuel source in the future because of its clean, high-yield, and sustainable properties. Therefore, this review focuses on recent advances in bio-H2 production from S. japonica. The cutting-edge biological technologies with suitable operating parameters to enhance S. japonica’s bio-H2 production efficiency are reviewed based on the Scopus database. In addition, guidelines for future developments in this field are discussed.
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17
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Preparation methods, biological activities, and potential applications of marine algae oligosaccharides: a review. FOOD SCIENCE AND HUMAN WELLNESS 2023. [DOI: 10.1016/j.fshw.2022.07.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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18
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Fu H, Yang L, Zhang H, Wang J. Deciphering of the Mannitol Metabolism Pathway in Clostridium tyrobutyricum ATCC 25755 by Comparative Transcriptome Analysis. Appl Biochem Biotechnol 2023; 195:1072-1084. [PMID: 36322284 DOI: 10.1007/s12010-022-04209-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/21/2022] [Indexed: 01/20/2023]
Abstract
Clostridium tyrobutyricum has great potential for bio-based chemicals and biofuel production from mannitol; however, the mannitol metabolic pathway and its metabolic regulatory mechanism have not been elucidated. To this end, the RNA-seq analysis on the mid-log growth phase of C. tyrobutyricum grown on mannitol or xylose was performed. Comparative transcriptome analysis and co-transcription experiment indicated that mtlARFD, which encodes the mannitol-specific IIA component, transcription activator, mannitol-specific IIBC components, and mannitol-1-phosphate 5-dehydrogenase, respectively, formed a polycistronic operon and could be responsible for mannitol uptake and metabolism. In addition, comparative genomic analysis of the mtlARFD organization and the MtlR protein structural domain among various Firmicutes strains identified the putative cre (catabolite-responsive element) sites and conserved phosphorylation sites, but whether the expression of mannitol operon was affected by CcpA- and MtlR-mediated metabolic regulation during mixed substrate fermentation needs to be further verified experimentally. Based on the gene knockout and complementation results, the predicted mannitol operon mtlARFD was confirmed to be responsible for mannitol utilization in C. tyrobutyricum. The results of this study could be used to enhance the mannitol metabolic pathway and explore the potential metabolic regulation mechanism of mannitol during mixed substrate fermentation.
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Affiliation(s)
- Hongxin Fu
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, China.
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology, Guangzhou, 510006, China.
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510006, China.
| | - Lu Yang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, China
| | - Huihui Zhang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, China
| | - Jufang Wang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, China.
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology, Guangzhou, 510006, China.
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510006, China.
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19
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Kai Y, Liu Y, Li H, Yang H. Wakame replacement alters the metabolic profile of wheat noodles after in vitro digestion. Food Res Int 2023; 164:112394. [PMID: 36737976 DOI: 10.1016/j.foodres.2022.112394] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 12/14/2022] [Accepted: 12/24/2022] [Indexed: 12/29/2022]
Abstract
The development of nutritional noodles of high quality has become a new hotspot of research in the area of food science. Since wakame is edible seaweed rich in dietary fiber and proteins and rarely found in ordinary noodle, this study investigated the release of metabolites, the texture quality, and the rheological properties of wakame noodle, as well as the mechanism by which extruded wakame flours can influence noodle texture and viscoelasticity through digestion. Basically, nuclear magnetic resonance spectra were applied to identify the 46 metabolites including amino acids, saccharides, fatty acids, and other metabolites. Both PCA and OPLS-DA model showed fit goodness and good predictivity, which were assessed the increasing release of most metabolites. Structural studies discussed the effects on the enhancement of interlinkage with gluten matrix and protein matrix, which were validated via the decreasing instantaneous compliance J0 (1.64 × 10-5 to 0.16 × 10-5 Pa-1). Wakame addition best matched the physiochemical properties of noodle, in terms of chewiness (99.10 vs 122.66 g.mm), gumminess (281.98 vs. 323.44 g), and gel strength (132.65 vs 173.95 kPa•s-1). Beyond the functional characteristics it contributes benefits like reduction of diet-related diabetes. As a consequence, the creation of personalized nutritious, healthy noodles will be an innovative route from a scientific viewpoint and an application standpoint.
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Affiliation(s)
- Yi Kai
- Department of Food Science and Technology, National University of Singapore, Singapore 117542, Singapore
| | - Yi Liu
- Department of Food Science and Technology, National University of Singapore, Singapore 117542, Singapore; National University of Singapore (Suzhou) Research Institute, 377 Lin Quan Street, Suzhou Industrial Park, Suzhou, Jiangsu 215123, PR China
| | - Hongliang Li
- Guangzhou Welbon Biological Technology Co., Ltd, Guangzhou, Guangdong 523660, PR China
| | - Hongshun Yang
- Department of Food Science and Technology, National University of Singapore, Singapore 117542, Singapore; National University of Singapore (Suzhou) Research Institute, 377 Lin Quan Street, Suzhou Industrial Park, Suzhou, Jiangsu 215123, PR China.
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20
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Angra V, Sehgal R, Gupta R. Trends in PHA Production by Microbially Diverse and Functionally Distinct Communities. MICROBIAL ECOLOGY 2023; 85:572-585. [PMID: 35333950 DOI: 10.1007/s00248-022-01995-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 03/10/2022] [Indexed: 06/14/2023]
Abstract
Along with the wide applications of conventional plastics, they have a large number of disadvantages like their non-biodegradable nature, dependency on fossil fuels and the release of large amounts of toxic materials in the environment. Therefore, to resolve these problems, a number of bioplastics are studied, out of which polyhydroxyalkanoates are considered as the best alternatives. Polyhydroxyalkanoates (PHAs) are produced by microorganisms as intracellular granules during stressful conditions. Though a wide range of organisms can naturally produce PHAs, only a few of them can be used for commercial production. Therefore, more diverse organisms that accumulate a considerable amount of PHAs and also reduce the production cost need to be exploited. Transgenic plants, recombinant bacteria, algae and extremophiles are some diverse organisms that produce a high amount of PHAs at a low cost. So, if potential organisms are used for PHA production, bioplastics will be able to completely replace petroleum-based polymers. Therefore, our review mainly focuses on production of PHAs using potential organisms so that amount of PHAs produced is high and cost-effective which would further help in the commercialization of PHAs.
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Affiliation(s)
- Vani Angra
- Department of Biotechnology, Himachal Pradesh University, Summerhill, Shimla, 171005, India
| | - Rutika Sehgal
- Department of Biotechnology, Himachal Pradesh University, Summerhill, Shimla, 171005, India
| | - Reena Gupta
- Department of Biotechnology, Himachal Pradesh University, Summerhill, Shimla, 171005, India.
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21
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Farghali M, Mohamed IMA, Osman AI, Rooney DW. Seaweed for climate mitigation, wastewater treatment, bioenergy, bioplastic, biochar, food, pharmaceuticals, and cosmetics: a review. ENVIRONMENTAL CHEMISTRY LETTERS 2023; 21:97-152. [PMID: 36245550 PMCID: PMC9547092 DOI: 10.1007/s10311-022-01520-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 09/12/2022] [Indexed: 05/02/2023]
Abstract
The development and recycling of biomass production can partly solve issues of energy, climate change, population growth, food and feed shortages, and environmental pollution. For instance, the use of seaweeds as feedstocks can reduce our reliance on fossil fuel resources, ensure the synthesis of cost-effective and eco-friendly products and biofuels, and develop sustainable biorefinery processes. Nonetheless, seaweeds use in several biorefineries is still in the infancy stage compared to terrestrial plants-based lignocellulosic biomass. Therefore, here we review seaweed biorefineries with focus on seaweed production, economical benefits, and seaweed use as feedstock for anaerobic digestion, biochar, bioplastics, crop health, food, livestock feed, pharmaceuticals and cosmetics. Globally, seaweeds could sequester between 61 and 268 megatonnes of carbon per year, with an average of 173 megatonnes. Nearly 90% of carbon is sequestered by exporting biomass to deep water, while the remaining 10% is buried in coastal sediments. 500 gigatonnes of seaweeds could replace nearly 40% of the current soy protein production. Seaweeds contain valuable bioactive molecules that could be applied as antimicrobial, antioxidant, antiviral, antifungal, anticancer, contraceptive, anti-inflammatory, anti-coagulants, and in other cosmetics and skincare products.
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Affiliation(s)
- Mohamed Farghali
- Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555 Japan
- Department of Animal and Poultry Hygiene and Environmental Sanitation, Faculty of Veterinary Medicine, Assiut University, Assiut, 71526 Egypt
| | - Israa M. A. Mohamed
- Department of Animal and Poultry Hygiene and Environmental Sanitation, Faculty of Veterinary Medicine, Assiut University, Assiut, 71526 Egypt
- Graduate School of Animal and Veterinary Sciences and Agriculture, Obihiro University of Agriculture and Veterinary Medicine, 2-11 Inada, Obihiro, Hokkaido 080-8555 Japan
| | - Ahmed I. Osman
- School of Chemistry and Chemical Engineering, David Keir Building, Queen’s University Belfast, Stranmillis Road, Belfast, Northern Ireland BT9 5AG UK
| | - David W. Rooney
- School of Chemistry and Chemical Engineering, David Keir Building, Queen’s University Belfast, Stranmillis Road, Belfast, Northern Ireland BT9 5AG UK
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22
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Chu D, Wang X, Fan J, Peng L, Liang J, Zheng Y, Wang R, You X, Jing C, Clark J, Li Y, Yuan Y. Ulva prolifera polysaccharide enhances the root colonisation by Bacillus amyloliquefaciens strain Cas02. Carbohydr Polym 2023; 299:120171. [PMID: 36876786 DOI: 10.1016/j.carbpol.2022.120171] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 09/15/2022] [Accepted: 09/26/2022] [Indexed: 10/14/2022]
Abstract
The application of biocontrol agent is important for the sustainable development of agriculture. Unsuccessful or limited colonisation by plant growth-promoting rhizobacteria (PGPR) has become an important constraint factor for their commercial application. Here, we report that Ulva prolifera polysaccharide (UPP) promotes root colonisation by Bacillus amyloliquefaciens strain Cas02. UPP serves as an environmental signal for bacterial biofilm formation and its glucose residue is used as a carbon source for the synthesis of the exopolysaccharides and poly-gamma-glutamate present in biofilm matrix. Greenhouse experiments demonstrated that UPP could effectively enhance the root colonisation by Cas02 in both the bacterial population and survival time under natural semiarid soil conditions. Furthermore, the microbiome analysis also indicated the promoted colonisation by Cas02, as well as the improved bacterial rhizosphere community structure, after combined treatment of UPP and Cas02. This study provides a practical approach to improve the biocontrol agent with seaweed polysaccharides.
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Affiliation(s)
- Depeng Chu
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Xiaoqiang Wang
- Key Laboratory of Tobacco Pest Monitoring & Integrated Management, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Jiajun Fan
- Green Chemistry Centre of Excellence, University of York, Heslington, York YO10 5DD, United Kingdom
| | - Lijuan Peng
- Yunnan Tobacco Quality Supervision and Test Station, Kunming 650106, China
| | - Jinchang Liang
- Key Laboratory of Tobacco Pest Monitoring & Integrated Management, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Yanfen Zheng
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Rui Wang
- Enshi Tobacco Science and Technology Center, Enshi 445000, China
| | - Xiangwei You
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Changliang Jing
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - James Clark
- Green Chemistry Centre of Excellence, University of York, Heslington, York YO10 5DD, United Kingdom
| | - Yiqiang Li
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China.
| | - Yuan Yuan
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China.
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23
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Jung HJ, Kim SH, Cho DH, Kim BC, Bhatia SK, Lee J, Jeon JM, Yoon JJ, Yang YH. Finding of Novel Galactose Utilizing Halomonas sp. YK44 for Polyhydroxybutyrate (PHB) Production. Polymers (Basel) 2022; 14:polym14245407. [PMID: 36559775 PMCID: PMC9782037 DOI: 10.3390/polym14245407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/26/2022] [Accepted: 12/08/2022] [Indexed: 12/14/2022] Open
Abstract
Polyhydroxybutyrate (PHB) is a biodegradable bioplastic with potential applications as an alternative to petroleum-based plastics. However, efficient PHB production remains difficult. The main cost of PHB production is attributed to carbon sources; hence, finding inexpensive sources is important. Galactose is a possible substrate for polyhydroxyalkanoate production as it is abundant in marine environments. Marine bacteria that produce PHB from galactose could be an effective resource that can be used for efficient PHB production. In this study, to identify a galactose utilizing PHB producer, we examined 16 Halomonas strains. We demonstrated that Halomonas cerina (Halomonas sp. YK44) has the highest growth and PHB production using a culture media containing 2% galactose, final 4% NaCl, and 0.1% yeast extract. These culture conditions yielded 8.98 g/L PHB (78.1% PHB content (w/w)). When galactose-containing red algae (Eucheuma spinosum) hydrolysates were used as a carbon source, 5.2 g/L PHB was produced with 1.425% galactose after treatment with activated carbon. Since high salt conditions can be used to avoid sterilization, we examined whether Halomonas sp. YK44 could produce PHB in non-sterilized conditions. Culture media in these conditions yielded 72.41% PHB content. Thus, Halomonas sp. YK44 is robust against contamination, allowing for long-term culture and economical PHB production.
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Affiliation(s)
- Hee Ju Jung
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Su Hyun Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Do Hyun Cho
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Byung Chan Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Shashi Kant Bhatia
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
- Institute for Ubiquitous Information Technology and Applications, Konkuk University, Seoul 05029, Republic of Korea
| | - Jongbok Lee
- Department of Biological and Chemical Engineering, Hongik University, Sejong 30016, Republic of Korea
| | - Jong-Min Jeon
- Green & Sustainable Materials R&D Department, Research Institute of Clean Manufacturing System, Korea Institute of Industrial Technology (KITECH), Cheonan 31056, Republic of Korea
| | - Jeong-Jun Yoon
- Green & Sustainable Materials R&D Department, Research Institute of Clean Manufacturing System, Korea Institute of Industrial Technology (KITECH), Cheonan 31056, Republic of Korea
| | - Yung-Hun Yang
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
- Institute for Ubiquitous Information Technology and Applications, Konkuk University, Seoul 05029, Republic of Korea
- Correspondence: ; Tel.: +82-2-450-2-3936
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24
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Hakim M, Patel I. High‐performance thin‐layer chromatography a densitometric detection of multi‐class bioactive compounds from three species of marine algae
Padina
and identification of antioxidant substance with mass spectrometry. SEPARATION SCIENCE PLUS 2022. [DOI: 10.1002/sscp.202200083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Masuma Hakim
- Department of Life Sciences Hemchandracharya North Gujarat University Patan India
| | - Illa Patel
- Department of Life Sciences Hemchandracharya North Gujarat University Patan India
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25
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Leadbeater DR, Bruce NC, Tonon T. In silico identification of bacterial seaweed-degrading bioplastic producers. Microb Genom 2022; 8:mgen000866. [PMID: 36125959 PMCID: PMC9676036 DOI: 10.1099/mgen.0.000866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 06/21/2022] [Indexed: 11/18/2022] Open
Abstract
There is an urgent need to replace petroleum-based plastic with bio-based and biodegradable alternatives. Polyhydroxyalkanoates (PHAs) are attractive prospective replacements that exhibit desirable mechanical properties and are recyclable and biodegradable in terrestrial and marine environments. However, the production costs today still limit the economic sustainability of the PHA industry. Seaweed cultivation represents an opportunity for carbon capture, while also supplying a sustainable photosynthetic feedstock for PHA production. We mined existing gene and protein databases to identify bacteria able to grow and produce PHAs using seaweed-derived carbohydrates as substrates. There were no significant relationships between the genes involved in the deconstruction of algae polysaccharides and PHA production, with poor to negative correlations and diffused clustering suggesting evolutionary compartmentalism. We identified 2 987 bacterial candidates spanning 40 taxonomic families predominantly within Alphaproteobacteria, Gammaproteobacteria and Burkholderiales with enriched seaweed-degrading capacity that also harbour PHA synthesis potential. These included highly promising candidates with specialist and generalist specificities, including Alteromonas, Aquisphaera, Azotobacter, Bacillus, Caulobacter, Cellvibrionaceae, Duganella, Janthinobacterium, Massilia, Oxalobacteraceae, Parvularcula, Pirellulaceae, Pseudomonas, Rhizobacter, Rhodanobacter, Simiduia, Sphingobium, Sphingomonadaceae, Sphingomonas, Stieleria, Vibrio and Xanthomonas. In this enriched subset, the family-level densities of genes targeting green macroalgae polysaccharides were considerably higher (n=231.6±68.5) than enzymes targeting brown (n=65.34±13.12) and red (n=30.5±10.72) polysaccharides. Within these organisms, an abundance of FabG genes was observed, suggesting that the fatty acid de novo synthesis pathway supplies (R)-3-hydroxyacyl-CoA or 3-hydroxybutyryl-CoA from core metabolic processes and is the predominant mechanism of PHA production in these organisms. Our results facilitate extending seaweed biomass valorization in the context of consolidated biorefining for the production of bioplastics.
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Affiliation(s)
- Daniel R. Leadbeater
- Centre for Novel Agricultural Products, Department of Biology, University of York, Heslington, York YO10 5DD, UK
| | - Neil C. Bruce
- Centre for Novel Agricultural Products, Department of Biology, University of York, Heslington, York YO10 5DD, UK
| | - Thierry Tonon
- Centre for Novel Agricultural Products, Department of Biology, University of York, Heslington, York YO10 5DD, UK
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26
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Cheng A, Lim WY, Lim PE, Yang Amri A, Poong SW, Song SL, Ilham Z. Marine Autotroph-Herbivore Synergies: Unravelling the Roles of Macroalgae in Marine Ecosystem Dynamics. BIOLOGY 2022; 11:biology11081209. [PMID: 36009834 PMCID: PMC9405220 DOI: 10.3390/biology11081209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 07/25/2022] [Accepted: 07/26/2022] [Indexed: 11/22/2022]
Abstract
Simple Summary Invasive species are a leading hazard to marine ecosystems worldwide, coupled with climate change. Tackling the emerging biodiversity threat to maintain the ecological balance of the largest biome in the world has now become a pivotal part of the Sustainable Development Goals (SDGs). Marine herbivores are generally regarded as biological agents that restrict invasive species, and their efficiency depends on their dietary habits, especially the autotrophs they eat. Many researchers have found contradicting findings on the effects of nutritional attributes and novelty of autotrophs on herbivore eating behaviour. In light of the scattered literature on the mechanistic basis of autotroph-herbivore interactions, we provide a comprehensive review to fill knowledge gaps about synergies based on macroalgae, an important group of photosynthetic organisms in the marine biome that interact strongly with generalist herbivores. We also analyse macroalgal defence measures against herbivores, underlining unique features and potential roles in maintaining marine ecosystems. The nutritional qualities, shape, and novelty of autotrophs can alter herbivore feeding behaviour. Future research should explore aspects that can alter marine autotroph-herbivore interactions to resolve inconsistent results of specific features and the uniqueness of the organisms involved. Abstract Species invasion is a leading threat to marine ecosystems worldwide, being deemed as one of the ultimate jeopardies for biodiversity along with climate change. Tackling the emerging biodiversity threat to maintain the ecological balance of the largest biome in the world has now become a pivotal part of the Sustainable Development Goals (SDGs). Marine herbivores are often considered as biological agents that control the spread of invasive species, and their effectiveness depends largely on factors that influence their feeding preferences, including the specific attributes of their food–the autotrophs. While the marine autotroph-herbivore interactions have been substantially discussed globally, many studies have reported contradictory findings on the effects of nutritional attributes and novelty of autotrophs on herbivore feeding behaviour. In view of the scattered literature on the mechanistic basis of autotroph-herbivore interactions, we generate a comprehensive review to furnish insights into critical knowledge gaps about the synergies based largely on the characteristics of macroalgae; an important group of photosynthetic organisms in the marine biome that interact strongly with generalist herbivores. We also discuss the key defence strategies of these macroalgae against the herbivores, highlighting their unique attributes and plausible roles in keeping the marine ecosystems intact. Overall, the feeding behaviour of herbivores can be affected by the nutritional attributes, morphology, and novelty of the autotrophs. We recommend that future research should carefully consider different factors that can potentially affect the dynamics of the marine autotroph-herbivore interactions to resolve the inconsistent results of specific attributes and novelty of the organisms involved.
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Affiliation(s)
- Acga Cheng
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Wai Yin Lim
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, Kuala Lumpur 50603, Malaysia
- Institute of Ocean and Earth Sciences, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Phaik-Eem Lim
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, Kuala Lumpur 50603, Malaysia
- Institute of Ocean and Earth Sciences, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Affendi Yang Amri
- Institute of Ocean and Earth Sciences, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Sze-Wan Poong
- Institute of Ocean and Earth Sciences, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Sze-Looi Song
- Institute of Ocean and Earth Sciences, Universiti Malaya, Kuala Lumpur 50603, Malaysia
- Institute for Advanced Studies, Universiti Malaya, Kuala Lumpur 50603, Malaysia
- Correspondence: (S.-L.S.); (Z.I.); Tel.: +60-37967-4014 (Z.I.)
| | - Zul Ilham
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, Kuala Lumpur 50603, Malaysia
- Department of Biological and Environmental Engineering, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14850, USA
- Correspondence: (S.-L.S.); (Z.I.); Tel.: +60-37967-4014 (Z.I.)
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27
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Abu NJ, Bujang JS, Zakaria MH, Zulkifly S. Use of Ulva reticulata as a growth supplement for tomato (Solanum lycopersicum). PLoS One 2022; 17:e0270604. [PMID: 35759504 PMCID: PMC9236269 DOI: 10.1371/journal.pone.0270604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 06/13/2022] [Indexed: 11/23/2022] Open
Abstract
Mass proliferation and accumulation of the green macroalga Ulva reticulata are problems in coastal areas and affect other ecosystems, such as those involving seagrasses. In the absence of any intervention, the decomposition of these macroalgae over time can disrupt the balance of recipient ecosystems. Attention has been given to the potential use of U. reticulata as a supplier of nutrients for crop species such as tomatoes as a possible solution to the buildup of this unusable seaweed species, which is usually left to decompose in affected seagrass ecosystems; this is the case in the Merambong seagrass meadow in the Sungai Pulai estuary in Gelang Patah, southwestern Johor, Malaysia. We analyzed the macro- and micronutrient contents in U. reticulata to determine nutrient availability. We also performed greenhouse studies to test the effects of crude extracts from dried U. reticulata-Extract “A” and fresh U. reticulata-Extract “B” on plant growth, total yield, and quality vine-ripened fruits. Compared to other seaweed extracts used as plant growth promoters, U. reticulata extracts have higher nitrogen (N), manganese (Mn), zinc (Zn), and iron (Fe) contents. The application of 30% Extracts “A” and “B” and 50% Extracts “A” and “B” significantly affected tomato plant height. However, extract concentrations that promoted plant height and hastened flowering and fruiting did not increase total fruit yields. Both treatments that positively affected tomato plant height and hastened flowering and fruiting resulted in increased contents of total soluble solids (TSS), beta-carotene, lycopene, ascorbic acid and total titratable acidity (TTA) in the vine-ripened fruits. Agronomically, the application of 5% Extracts “A” and “B”, 10%-20% Extracts “A” and “B”, and 50% Extract “A” doubled the total yield compared to those of the control, and 40% Extract “A” resulted in the highest total fruit yield. In general, tomato plants responded well to Extract “A” than Extract “B” and presented good total fruit yield and quality.
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Affiliation(s)
- Nor Jawahir Abu
- Department of Biology, Faculty of Science, Universiti Putra Malaysia, UPM Serdang, Selangor Darul Ehsan, Malaysia
| | - Japar Sidik Bujang
- Department of Biology, Faculty of Science, Universiti Putra Malaysia, UPM Serdang, Selangor Darul Ehsan, Malaysia
- * E-mail:
| | - Muta Harah Zakaria
- Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia, UPM Serdang, Selangor Darul Ehsan, Malaysia
- International Institute of Aquaculture and Aquatic Sciences (I-AQUAS), Universiti Putra Malaysia (UPM), Port Dickson, Negeri Sembilan, Malaysia
| | - Shahrizim Zulkifly
- Department of Biology, Faculty of Science, Universiti Putra Malaysia, UPM Serdang, Selangor Darul Ehsan, Malaysia
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28
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Yao W, Liu M, Chen X, You L, Ma Y, Hileuskaya K. Effects of UV/H 2O 2 degradation and step gradient ethanol precipitation on Sargassum fusiforme polysaccharides: Physicochemical characterization and protective effects against intestinal epithelial injury. Food Res Int 2022; 155:111093. [PMID: 35400466 DOI: 10.1016/j.foodres.2022.111093] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 03/01/2022] [Accepted: 03/02/2022] [Indexed: 11/18/2022]
Abstract
In this study, the degraded purified fraction from Sargassum fusiforme polysaccharides (SFP), named DSFP, was produced by the treatment of ultraviolet/hydrogen peroxide (UV/H2O2) degradation and step gradient ethanol precipitation. Results showed that the treatment significantly reduced the molecular weight of polysaccharides, from 282.83 kDa to 18.54 kDa, and influenced their surface morphology and roughness. SFP and DSFP were typical sulfated polysaccharides, mainly composed of fucose, galacturonic acid, glucuronic acid, galactose, and mannose. Both SFP and DSFP increased cell migration during intestinal epithelial wound healing and stimulated the cell cycle progression by promoting the transition from G0/G1 to S phase in the rat intestine epithelium cells (IEC-6). But DSFP had a stronger positive effect on wound healing and cell migration than SFP. It reinforced the intestinal barrier function and attenuated lipopolysaccharides-induced intestinal inflammation. DSFP significantly downregulated the expression of Toll-like receptor 4, tumor necrosis factor-α, interleukin-6, interleukin-1β, and inducible nitric oxide synthase by 53.14%, 92.41%, 66.01%, 68.24%, and 78.09%, respectively, and upregulated that of interleukin-10 by 2.48 folds when compared to the model. Therefore, the treatment (UV/H2O2 degradation and step gradient ethanol precipitation) could effectively improve the protective effects against intestinal epithelial injury.
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Affiliation(s)
- Wanzi Yao
- School of Food Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China; Research Institute for Food Nutrition and Human Health (111 Center), Guangzhou, Guangdong 510640, China
| | - Mengyuan Liu
- School of Food Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China; Research Institute for Food Nutrition and Human Health (111 Center), Guangzhou, Guangdong 510640, China
| | - Xiaoyong Chen
- School of Food Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China; Research Institute for Food Nutrition and Human Health (111 Center), Guangzhou, Guangdong 510640, China
| | - Lijun You
- School of Food Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China; Research Institute for Food Nutrition and Human Health (111 Center), Guangzhou, Guangdong 510640, China.
| | - Yongxuan Ma
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong 510610, China
| | - Kseniya Hileuskaya
- Institute of Chemistry of New Materials of National Academy of Science of Belarus
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29
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Yu S, Park SY, Kim DH, Yun EJ, Kim KH. Multi-Step Enzymatic Production and Purification of 2-Keto-3-Deoxy-Galactonate from Red-Macroalgae-Derived Agarose. Mar Drugs 2022; 20:md20050288. [PMID: 35621939 PMCID: PMC9147760 DOI: 10.3390/md20050288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 04/22/2022] [Accepted: 04/22/2022] [Indexed: 02/04/2023] Open
Abstract
2-keto-3-deoxy sugar acids, which have potential as precursors in medicinal compound production, have gained attention in various fields. Among these acids, 2-keto-3-deoxy-l-galactonate (KDGal) has been biologically produced from D-galacturonate originating from plant-derived pectin. KDGal is also found in the catabolic pathway of 3,6-anhydro-l-galactose (AHG), the main component of red-algae-derived agarose. AHG is converted to 3,6-anhydrogalactonate by AHG dehydrogenase and subsequently isomerized to KDGal by 3,6-anhydrogalactonate cycloisomerase. Therefore, we used the above-described pathway to produce KDGal from agarose. Agarose was depolymerized to AHG and to agarotriose (AgaDP3) and agaropentaose (AgaDP5), both of which have significantly higher molecular weights than AHG. When only AHG was converted to KDGal, AgaDP3 and AgaDP5 remained unreacted. Finally, KDGal was effectively purified from the enzymatic products by size-exclusion chromatography based on the differences in molecular weights. These results show that KDGal can be enzymatically produced and purified from agarose for use as a precursor to high-value products.
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Affiliation(s)
- Sora Yu
- Department of Biotechnology, Graduate School, Korea University, Seoul 02841, Korea; (S.Y.); (S.Y.P.)
| | - So Young Park
- Department of Biotechnology, Graduate School, Korea University, Seoul 02841, Korea; (S.Y.); (S.Y.P.)
| | - Dong Hyun Kim
- Department of Marine Food Science and Technology, Gangneung-Wonju National University, Gangneung 25457, Gangwon, Korea;
| | - Eun Ju Yun
- Division of Biotechnology, Jeonbuk National University, Iksan 54596, Korea
- Correspondence: (E.J.Y.); (K.H.K.)
| | - Kyoung Heon Kim
- Department of Biotechnology, Graduate School, Korea University, Seoul 02841, Korea; (S.Y.); (S.Y.P.)
- Department of Food Bioscience and Technology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Korea
- Correspondence: (E.J.Y.); (K.H.K.)
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30
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Abd El-Malek F, Rofeal M, Zabed HM, Nizami AS, Rehan M, Qi X. Microorganism-mediated algal biomass processing for clean products manufacturing: Current status, challenges and future outlook. FUEL 2022; 311:122612. [DOI: 10.1016/j.fuel.2021.122612] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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31
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Karunarathne SA, van Walsum GP. Integrating the Carboxylate Platform into a Red Seaweed Biorefinery. Appl Biochem Biotechnol 2022; 194:1235-1258. [PMID: 34661868 DOI: 10.1007/s12010-021-03699-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 10/04/2021] [Indexed: 11/29/2022]
Abstract
Macroalgae are an important source of food, fertilizer, hydrocolloids, and healthful bioactive components. Macroalgae are also being considered sources of biofuels, which require minimal demands for arable land, fresh water, or fertilizers. In this study, we explored the possibility of developing a red seaweed biorefinery process to extract carrageenan while producing chemical or biofuel co-products derived from the carrageenan extraction wastes. A common approach to processing organic wastes is to generate biogas; however, in this study, we targeted a potentially higher value option by applying acidogenic digestion to convert extraction wastes to carboxylic acids and derived compounds. Using an open culture of microorganisms, wastes from a carrageenan extraction plant were converted to mixed carboxylic acids, which were then neutralized and thermally decomposed to a variety of ketones. Batch digestions of the wastes were carried out at temperatures of 35 °C and 55 °C. Either calcium carbonate or ammonium bicarbonate was used as buffer. A solid-liquid counter-current percolation fermentation was operated in four stages at 35 °C. Digestion produced carboxylic acids ranging in chain length from one to seven carbons. The mesophilic temperature gave higher carboxylic acid yield and longer chain acids, with the highest acid titer reaching 18 g L-1. Thermal decomposition of carboxylate salts produced a mixture of ketones which contained acetone, 3-pentanone, 2-hexanone, 2-heptanone, 3-heptanone, and 4-octanone as major products. These ketones could be sold as chemicals or hydrogenated to form corresponding chain length secondary alcohols which deliver higher energy density than ethanol.
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Affiliation(s)
- Sampath A Karunarathne
- Department of Chemical and Biomedical Engineering, Forest Bioproducts Research Institute, University of Maine, 5737 Jenness Hall, Orono, ME, 04469-5737, USA
| | - G Peter van Walsum
- Department of Chemical and Biomedical Engineering, Forest Bioproducts Research Institute, University of Maine, 5737 Jenness Hall, Orono, ME, 04469-5737, USA.
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32
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Effects of Structural and Compositional Changes of Nanochloropsis oceania after Enzyme Treatment on EPA-Rich Lipids Extraction. Mar Drugs 2022; 20:md20030160. [PMID: 35323459 PMCID: PMC8955213 DOI: 10.3390/md20030160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 02/14/2022] [Accepted: 02/20/2022] [Indexed: 12/03/2022] Open
Abstract
Improved methods for the extraction of eicosapentaenoic acid (EPA), an essential and economically important polyunsaturated fatty acid, are urgently required. However, lipid extraction rates using food-grade solvents such as ethanol are usually low. To improve the ethanol-based extraction rate, and to elucidate the relevant mechanisms, we used cellulase and laccase to treat powdered Nannochloropsis, one of the most promising microalgal sources of EPA. Cellulase and laccase synergistically increased lipid yields by 69.31% and lipid EPA content by 42.63%, by degrading the amorphous hemicellulose and cellulose, improving crystallinity, and promoting the release and extraction of lysodiacylglyceryltrimethylhomoserine. Scanning electron microscopy showed that cell morphology was substantially altered, with cell-wall rupture, loss of cell boundaries, and the release of intracellular substances. In conclusion, Nannochloropsis lipid yields may be directly linked to cell-wall hemicellulose structure, and enzymatic treatment to alter this may improve lipid yields.
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Thermochemical Characterization of Eight Seaweed Species and Evaluation of Their Potential Use as an Alternative for Biofuel Production and Source of Bioactive Compounds. Int J Mol Sci 2022; 23:ijms23042355. [PMID: 35216471 PMCID: PMC8880020 DOI: 10.3390/ijms23042355] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/09/2022] [Accepted: 02/15/2022] [Indexed: 01/27/2023] Open
Abstract
Algae are underexplored resources in Western countries and novel approaches are needed to boost their industrial exploitation. In this work, eight edible seaweeds were subjected to their valorization in terms of nutritional characterization, thermochemical properties, and bioactive profile. Our results suggest that seaweeds present a rich nutritional profile, in which carbohydrates are present in high proportions, followed by a moderate protein composition and a valuable content of ω-3 polyunsaturated fatty acids. The thermochemical characterization of seaweeds showed that some macroalgae present a low ash content and high volatile matter and carbon fixation rates, being promising sources for alternative biofuel production. The bioactive profile of seaweeds was obtained from their phenolic and carotenoid content, together with the evaluation of their associated bioactivities. Among all the species analyzed, Porphyra purpurea presented a balanced composition in terms of carbohydrates and proteins and the best thermochemical profile. This species also showed moderate anti-inflammatory activity. Additionally, Himanthalia elongata extracts showed the highest contents of total phenolics and a moderate carotenoid content, which led to the highest rates of antioxidant activity. Overall, these results suggest that seaweeds can be used as food or functional ingredient to increase the nutritional quality of food formulations.
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Present and Future of Seaweed Cultivation and Its Applications in Colombia. JOURNAL OF MARINE SCIENCE AND ENGINEERING 2022. [DOI: 10.3390/jmse10020243] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Colombia has a diverse range of marine ecosystems in the coastal and insular areas of the Caribbean Sea and the Pacific Ocean. Seaweed research has focused mainly on the identification and taxonomic distribution of 628 species identified so far, mainly in the Caribbean Sea. Among the most widely cultivated genera of seaweeds in open-sea pilot systems in Colombia are Hydropuntia, Gracilaria, Hypnea, Kappaphycus, and Eucheuma. These genera have shown low yields as a consequence of high tissue fragility, epiphytism, sedimentation, and nitrogen deficiency. In addition, the evaluation of the biological activity of selected seaweed compounds has advanced considerably, focusing on their composition and their use for direct consumption by humans and animals. Despite the diversity of seaweeds, as well as certain technical and scientific advances, Colombia is still lagging behind other countries in seaweed exploitation, both in Latin America and worldwide. This current status raises the need to increase research, technological (agro-tech) appropriation, and the adoption of effective public policies that will boost algal businesses. In addition, seaweed cultivation could support the current blue economy transition in Colombia, which could eventually allow the country to enter the global seaweed market.
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Zheng Y, Li Y, Yang Y, Zhang Y, Wang D, Wang P, Wong ACY, Hsieh YSY, Wang D. Recent Advances in Bioutilization of Marine Macroalgae Carbohydrates: Degradation, Metabolism, and Fermentation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:1438-1453. [PMID: 35089725 DOI: 10.1021/acs.jafc.1c07267] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Marine macroalgae are considered renewable natural resources due to their high carbohydrate content, which gives better utilization value in biorefineries and higher value conversion than first- and second-generation biomass. However, due to the diverse composition, complex structure, and rare metabolic pathways of macroalgae polysaccharides, their bioavailability needs to be improved. In recent years, enzymes and pathways related to the degradation and metabolism of macroalgae polysaccharides have been continuously developed, and new microbial fermentation platforms have emerged. Aiming at the bioutilization and transformation of macroalgae resources, this review describes the latest research results from the direction of green degradation, biorefining, and metabolic pathway design, including summarizing the the latest biorefining technology and the fermentation platform design of agarose, alginate, and other polysaccharides. This information will provide new research directions and solutions for the biotransformation and utilization of marine macroalgae.
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Affiliation(s)
- Yuting Zheng
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Yanping Li
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Yuanyuan Yang
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Ye Zhang
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Di Wang
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Peiyao Wang
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Ann C Y Wong
- School of Pharmacy, College of Pharmacy, Taipei Medical University, Taipei 110301, Taiwan
| | - Yves S Y Hsieh
- School of Pharmacy, College of Pharmacy, Taipei Medical University, Taipei 110301, Taiwan
- Division of Glycoscience, Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, Royal Institute of Technology (KTH), AlbaNova University Centre, 11421 Stockholm, Sweden
| | - Damao Wang
- College of Food Science, Southwest University, Chongqing 400715, China
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Hanko EKR, Sherlock G, Minton NP, Malys N. Biosensor-informed engineering of Cupriavidus necator H16 for autotrophic D-mannitol production. Metab Eng 2022; 72:24-34. [PMID: 35149227 DOI: 10.1016/j.ymben.2022.02.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 02/07/2022] [Accepted: 02/07/2022] [Indexed: 01/26/2023]
Abstract
Cupriavidus necator H16 is one of the most researched carbon dioxide (CO2)-fixing bacteria. It can store carbon in form of the polymer polyhydroxybutyrate and generate energy by aerobic hydrogen oxidation under lithoautotrophic conditions, making C. necator an ideal chassis for the biological production of value-added compounds from waste gases. Despite its immense potential, however, the experimental evidence of C. necator utilisation for autotrophic biosynthesis of chemicals is limited. Here, we genetically engineered C. necator for the high-level de novo biosynthesis of the industrially relevant sugar alcohol mannitol directly from Calvin-Benson-Bassham (CBB) cycle intermediates. To identify optimal mannitol production conditions in C. necator, a mannitol-responsive biosensor was applied for screening of mono- and bifunctional mannitol 1-phosphate dehydrogenases (MtlDs) and mannitol 1-phosphate phosphatases (M1Ps). We found that MtlD/M1P from brown alga Ectocarpus siliculosus performed overall the best under heterotrophic growth conditions and was selected to be chromosomally integrated. Consequently, autotrophic fermentation of recombinant C. necator yielded up to 3.9 g/L mannitol, representing a substantial improvement over mannitol biosynthesis using recombinant cyanobacteria. Importantly, we demonstrate that at the onset of stationary growth phase nearly 100% of carbon can be directed from the CBB cycle into mannitol through the glyceraldehyde 3-phosphate and fructose 6-phosphate intermediates. This study highlights for the first time the potential of C. necator to generate sugar alcohols from CO2 utilising precursors derived from the CBB cycle.
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Affiliation(s)
- Erik K R Hanko
- BBSRC/EPSRC Synthetic Biology Research Centre (SBRC), School of Life Sciences, The University of Nottingham, Nottingham, NG7 2RD, United Kingdom; Present address: Manchester Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, University of Manchester, Manchester, M1 7DN, United Kingdom
| | - Gillian Sherlock
- BBSRC/EPSRC Synthetic Biology Research Centre (SBRC), School of Life Sciences, The University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - Nigel P Minton
- BBSRC/EPSRC Synthetic Biology Research Centre (SBRC), School of Life Sciences, The University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - Naglis Malys
- BBSRC/EPSRC Synthetic Biology Research Centre (SBRC), School of Life Sciences, The University of Nottingham, Nottingham, NG7 2RD, United Kingdom.
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Ai N, Jiang Y, Omar S, Wang J, Xia L, Ren J. Rapid Measurement of Cellulose, Hemicellulose, and Lignin Content in Sargassum horneri by Near-Infrared Spectroscopy and Characteristic Variables Selection Methods. Molecules 2022; 27:335. [PMID: 35056650 PMCID: PMC8780011 DOI: 10.3390/molecules27020335] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 12/30/2021] [Accepted: 12/31/2021] [Indexed: 11/17/2022] Open
Abstract
Near-infrared (NIR) spectroscopy and characteristic variables selection methods were used to develop a quick method for the determination of cellulose, hemicellulose, and lignin contents in Sargassum horneri. Calibration models for cellulose, hemicellulose, and lignin in Sargassum horneri were established using partial least square regression methods with full variables (full-PLSR). The PLSR calibration models were established by four characteristic variables selection methods, including interval partial least square (iPLS), competitive adaptive reweighted sampling (CARS), correlation coefficient (CC), and genetic algorithm (GA). The results showed that the performance of the four calibration models, namely iPLS-PLSR, CARS-PLSR, CC-PLSR, and GA-PLSR, was better than the full-PLSR calibration model. The iPLS method was best in the performance of the models. For iPLS-PLSR, the determination coefficient (R2), root mean square error (RMSE), and residual predictive deviation (RPD) of the prediction set were as follows: 0.8955, 0.8232%, and 3.0934 for cellulose, 0.8669, 0.4697%, and 2.7406 for hemicellulose, and 0.7307, 0.7533%, and 1.9272 for lignin, respectively. These findings indicate that the NIR calibration models can be used to predict cellulose, hemicellulose, and lignin contents in Sargassum horneri quickly and accurately.
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Affiliation(s)
- Ning Ai
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, China;
- Zhejiang Province Key Laboratory of Biomass Fuel, Hangzhou 310014, China;
| | - Yibo Jiang
- Zhejiang Province Key Laboratory of Biomass Fuel, Hangzhou 310014, China;
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Sainab Omar
- Chemical Engineering and Applied Chemistry, Aston University, Aston Triangle, Birmingham B4 7ET, UK; (S.O.); (J.W.)
| | - Jiawei Wang
- Chemical Engineering and Applied Chemistry, Aston University, Aston Triangle, Birmingham B4 7ET, UK; (S.O.); (J.W.)
| | - Luyue Xia
- Zhejiang Province Key Laboratory of Biomass Fuel, Hangzhou 310014, China;
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jie Ren
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, China;
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Pradhan B, Bhuyan PP, Patra S, Nayak R, Behera PK, Behera C, Behera AK, Ki JS, Jena M. Beneficial effects of seaweeds and seaweed-derived bioactive compounds: Current evidence and future prospective. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2022. [DOI: 10.1016/j.bcab.2021.102242] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Trung VT, Van Huynh T, Thinh PD, San PT, Bang TH, Hang NT. Probiotic Fermented Beverage From Macroalgae. Nat Prod Commun 2021. [DOI: 10.1177/1934578x211066145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
We have tested the hypothesis that a fermented beverage from the macroalgae Hydropuntia eucheumatoides exhibits antioxidant and enzymatic activity. The macroalga was hydrolyzed (maximum hydrolysis yield: 78%) with a mixture of the enzymes viscozyme and lactozyme. Then, the hydrolyzate was fermented with Lactobacillus casei and Saccharomyces boulardii. This beverage contained oligosaccharide prebiotics. The lactic acid, acetic acid, ethanol, methanol, cell count, pH, and heavy metal content of the beverage were determined. All tested heavy metals were either not detected (eg, As) or within the US Food and Drug Administration limits (eg, Fe).
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Affiliation(s)
- Vo T. Trung
- Nhatrang Institute of Technology Research and Application, Vietnam Academy of Science and Technology, Khanh Hoa, Viet Nam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Viet Nam
| | - Tran Van Huynh
- Nhatrang Institute of Technology Research and Application, Vietnam Academy of Science and Technology, Khanh Hoa, Viet Nam
| | - Pham D. Thinh
- Nhatrang Institute of Technology Research and Application, Vietnam Academy of Science and Technology, Khanh Hoa, Viet Nam
| | - Pham T. San
- Nhatrang Institute of Technology Research and Application, Vietnam Academy of Science and Technology, Khanh Hoa, Viet Nam
| | - Truong H. Bang
- Nhatrang Institute of Technology Research and Application, Vietnam Academy of Science and Technology, Khanh Hoa, Viet Nam
| | - Nguyen T. Hang
- School of Biotechnology and Food Technology, Hanoi University of Science and Technology, Ha Noi, Viet Nam
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Singh S, Verma DK, Thakur M, Tripathy S, Patel AR, Shah N, Utama GL, Srivastav PP, Benavente-Valdés JR, Chávez-González ML, Aguilar CN. Supercritical fluid extraction (SCFE) as green extraction technology for high-value metabolites of algae, its potential trends in food and human health. Food Res Int 2021; 150:110746. [PMID: 34865764 DOI: 10.1016/j.foodres.2021.110746] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 10/01/2021] [Accepted: 10/06/2021] [Indexed: 02/07/2023]
Abstract
Application of high-value algal metabolites (HVAMs) in cosmetics, additives, pigments, foods and medicines are very important. These HVAMs can be obtained from the cultivation of micro- and macro-algae. These metabolites can benefit human and animal health in a physiological and nutritional manner. However, because of conventional extraction methods and their energy and the use of pollutant solvents, the availability of HVAMs from algae remains insufficient. Receiving their sustainability and environmental benefits have recently made green extraction technologies for HVAM extractions more desirable. But very little information is available about the technology of green extraction of algae from these HVAM. This review, therefore, highlights the supercritical fluid extraction (SCFE) as principal green extraction technologyand theirideal parameters for extracting HVAMs. In first, general information is provided concerning the HVAMs and their components of macro and micro origin. The review also includes a description of SCFE technology's properties, instrumentation operation, solvents used, and the merits and demerits. Moreover, there are several HVAMs associated with their numerous high-level biological activities which include high-level antioxidant, anti-inflammatory, anticancer and antimicrobial activity and have potential health-beneficial effects in humans since they are all HVAMs, such as foods and nutraceuticals. Finally, it provides future insights, obstacles, and suggestions for selecting the right technologies for extraction.
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Affiliation(s)
- Smita Singh
- Department of Nutrition and Dietetics, University Institute of Applied Health Sciences, Chandigarh University, Chandigarh 140413, Punjab, India.
| | - Deepak Kumar Verma
- Agricultural and Food Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India.
| | - Mamta Thakur
- Department of Food Technology, School of Sciences, ITM University, Gwalior 474001, Madhya Pradesh, India.
| | - Soubhagya Tripathy
- Agricultural and Food Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Ami R Patel
- Division of Dairy Microbiology, Mansinhbhai Institute of Dairy and Food Technology-MIDFT, Dudhsagar Dairy Campus, Mehsana 384 002, Gujarat, India
| | - Nihir Shah
- Division of Dairy Microbiology, Mansinhbhai Institute of Dairy and Food Technology-MIDFT, Dudhsagar Dairy Campus, Mehsana 384 002, Gujarat, India
| | - Gemilang Lara Utama
- Faculty of Agro-Industrial Technology, Universitas Padjadjaran, Sumedang 45363, Indonesia; Center for Environment and Sustainability Science, Universitas Padjadjaran, Bandung 40132, Indonesia
| | - Prem Prakash Srivastav
- Agricultural and Food Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Juan Roberto Benavente-Valdés
- Bioprocesses and Bioproducts Research Group, Food Research Department, School of Chemistry, Autonomous University of Coahuila, Saltillo Campus, 25280 Coahuila, Mexico
| | - Mónica L Chávez-González
- Bioprocesses and Bioproducts Research Group, Food Research Department, School of Chemistry, Autonomous University of Coahuila, Saltillo Campus, 25280 Coahuila, Mexico
| | - Cristobal Noe Aguilar
- Bioprocesses and Bioproducts Research Group, Food Research Department, School of Chemistry, Autonomous University of Coahuila, Saltillo Campus, 25280 Coahuila, Mexico.
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41
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Park MR, Jeong GT. Production of reducing sugar in Gracilaria verrucosa using physio-chemical pretreatment and subsequent enzymatic hydrolysis. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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42
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Malafronte L, Yilmaz-Turan S, Krona A, Martinez-Sanz M, Vilaplana F, Lopez-Sanchez P. Macroalgae suspensions prepared by physical treatments: Effect of polysaccharide composition and microstructure on the rheological properties. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2021.106989] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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43
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Costa M, Cardoso C, Afonso C, Bandarra NM, Prates JAM. Current knowledge and future perspectives of the use of seaweeds for livestock production and meat quality: a systematic review. J Anim Physiol Anim Nutr (Berl) 2021; 105:1075-1102. [PMID: 33660883 DOI: 10.1111/jpn.13509] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 01/09/2021] [Accepted: 01/17/2021] [Indexed: 12/12/2022]
Abstract
The effects of dietary macroalgae, or seaweeds, on growth performance and meat quality of livestock animal species are here reviewed. Macroalgae are classified into Phaeophyceae (brown algae), Rhodophyceae (red algae) and Chlorophyceae (green algae). The most common macroalga genera used as livestock feedstuffs are: Ascophyllum, Laminaria and Undaria for brown algae; Ulva, Codium and Cladophora for green algae; and Pyropia, Chondrus and Palmaria for red algae. Macroalgae are rich in many nutrients, including bioactive compounds, such as soluble polysaccharides, with some species being good sources of n-3 and n-6 polyunsaturated fatty acids. To date, the incorporation of macroalgae in livestock animal diets was shown to improve growth and meat quality, depending on the alga species, dietary level and animal growth stage. Generally, Ascophyllum nodosum can increase average daily gain (ADG) in ruminant and pig mostly due to its prebiotic activity in animal's gut. A. nodosum also enhances marbling score, colour uniformity and redness, and can decrease saturated fatty acids in ruminant meats. Laminaria sp., mainly Laminaria digitata, increases ADG and feed efficiency, and improves the antioxidant potential of pork. Ulva sp., and its mixture with Codium sp., was shown to improve poultry growth at up to 10% feed. Therefore, seaweeds are promising sustainable alternatives to corn and soybean as feed ingredients, thus attenuating the current competition among food-feed-biofuel industries. In addition, macroalgae can hinder eutrophication and participate in bioremediation. However, some challenges need to be overcome, such as the development of large-scale and cost-effective algae production methods and the improvement of algae digestibility by monogastric animals. The dietary inclusion of Carbohydrate-Active enZymes (CAZymes) could allow for the degradation of recalcitrant macroalga cell walls, with an increase of nutrients bioavailability. Overall, the use of macroalgae as feedstuffs is a promising strategy for the development of a more sustainable livestock production.
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Affiliation(s)
- Mónica Costa
- CIISA - Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Lisbon, Portugal
| | - Carlos Cardoso
- DivAV - Division of Aquaculture and Upgrading, Portuguese Institute for the Sea and Atmosphere, Lisbon, Portugal
| | - Cláudia Afonso
- DivAV - Division of Aquaculture and Upgrading, Portuguese Institute for the Sea and Atmosphere, Lisbon, Portugal
| | - Narcisa M Bandarra
- DivAV - Division of Aquaculture and Upgrading, Portuguese Institute for the Sea and Atmosphere, Lisbon, Portugal
| | - José A M Prates
- CIISA - Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Lisbon, Portugal
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Joniver CF, Photiades A, Moore PJ, Winters AL, Woolmer A, Adams JM. The global problem of nuisance macroalgal blooms and pathways to its use in the circular economy. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102407] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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45
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Fu H, Hu J, Guo X, Feng J, Yang ST, Wang J. Butanol production from Saccharina japonica hydrolysate by engineered Clostridium tyrobutyricum: The effects of pretreatment method and heat shock protein overexpression. BIORESOURCE TECHNOLOGY 2021; 335:125290. [PMID: 34023662 DOI: 10.1016/j.biortech.2021.125290] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/07/2021] [Accepted: 05/08/2021] [Indexed: 06/12/2023]
Abstract
Macroalgal biomass is currently considered as a potential candidate for biofuel production. In this study, the effects of pretreatment method and heat shock protein overexpression were investigated for efficient butanol production from Saccharina japonica using engineered Clostridium tyrobutyricum. First, various pretreatment methods including acid hydrolysis, acid hydrolysis and enzymatic saccharification, and ultrasonic-assisted acid hydrolysis were employed to obtain the fermentable sugars, and the resulted hydrolysates were evaluated for butanol fermentation. The results showed that ultrasonic-assisted acid hydrolysate obtained the highest butanol yield (0.26 g/g) and productivity (0.19 g/L⋅h). Then, the effects of homologous or heterologous heat shock protein overexpression on butanol production and tolerance were examined. Among all the engineered strains, Ct-pMA12G exhibited improved butanol tolerance and enhanced butanol production (12.15 g/L butanol with a yield of 0.34 g/g and productivity of 0.15 g/L⋅h) from 1.8-fold concentrated S. japonica hydrolysate, which was the highest level ever reported for macroalgal biomass.
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Affiliation(s)
- Hongxin Fu
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Jialei Hu
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Xiaolong Guo
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Jun Feng
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Shang-Tian Yang
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, OH 43210, USA
| | - Jufang Wang
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China.
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Jeong GT. Valorization of microalgae into 5-hydroxymethylfurfural by two-step conversion with ferric sulfate. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 293:112919. [PMID: 34089958 DOI: 10.1016/j.jenvman.2021.112919] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 04/26/2021] [Accepted: 05/07/2021] [Indexed: 06/12/2023]
Abstract
Microalgae are known as renewable, potential, and sustainable feedstocks for biofuel production. The present work investigated the efficient valorization of green microalgae Chlorella sp. to produce sugars and 5-hydroxymethylfurfural (5-HMF) using thermochemical conversion with a metal-salt (ferric sulfate) as catalyst using a statistical approach and two-step conversion. A statistical approach with a Box-Behnken design was introduced to optimize the conversion for producing sugars. As a result of optimization, 86.46% sugar yield (68.32% glucose yield) was achieved under the condition of 5% biomass and 0.6 g-catalyst/g-biomass at 155 °C and 40 min. Two-step thermochemical conversion was introduced to produce 5-HMF from microalgae. In the first step, sugars were produced from the above optimum condition; in the second step, sugar hydrolysates were converted into 5-HMF by thermochemical conversion without an additional catalyst. In two-step conversion, the maximum 5-HMF yield (37.23%) was achieved at 170 °C and 60 min from the sugar hydrolysate of microalgae obtained from the first-step thermochemical conversion with ferric sulfate. In conclusion, the microalgae as biomass and ferric sulfate as catalyst have availability and the potential to produce biosugars and platform chemicals.
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Affiliation(s)
- Gwi-Taek Jeong
- Department of Biotechnology, Pukyong National University, Busan, 48513, Republic of Korea.
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Jiang Z, Long L, Liang M, Li H, Chen Y, Zheng M, Ni H, Li Q, Zhu Y. Characterization of a glucose-stimulated β-glucosidase from Microbulbifer sp. ALW1. Microbiol Res 2021; 251:126840. [PMID: 34375805 DOI: 10.1016/j.micres.2021.126840] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 05/18/2021] [Accepted: 08/02/2021] [Indexed: 11/27/2022]
Abstract
Glucose-tolerant and/or glucose-stimulated β-glucosidase is of great interest for its industrial utilization in enzymatic digestion of lignocellulosic biomass for biofuel production. In this study, a new gene of β-glucosidase MaGlu1A was cloned from an alginate-degrading marine bacterium Microbulbifer sp. ALW1. The gene of MaGlu1A encoded a 472-amino acid protein classified into the glycosyl hydrolase family 1 (GH1). The recombinant β-glucosidase was overexpressed and purified from Escherichia coli with a molecular mass of 65.0 kDa. Structure analysis illustrated the catalytic acid/base residue Glu186 and nucleophilic residue Glu370 in the enzyme. MaGlu1A displayed optimal activity at 40 °C and pH 4.5, respectively. It had substrate preference to the aryl-β-glycosidic bonds with glucose, fucose, and galactose moieties, in addition to cellobiose. MaGlu1A demonstrated strong stimulation to the supplemental glucose. Site-directed mutagenesis suggested an essential role of Asn242 in glucose stimulation. The enzymatic characterization of MaGlu1A provides general information about its catalytic properties facilitating its practical applications.
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Affiliation(s)
- Zedong Jiang
- College of Food and Biological Engineering, Jimei University, Xiamen, 361021, China; Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Xiamen, 361021, China; Research Center of Food Biotechnology of Xiamen City, Xiamen, 361021, China
| | - Liufei Long
- College of Food and Biological Engineering, Jimei University, Xiamen, 361021, China
| | - Meifang Liang
- College of Food and Biological Engineering, Jimei University, Xiamen, 361021, China
| | - Hebin Li
- Xiamen Medical College, Xiamen, 361008, China
| | - Yanhong Chen
- College of Food and Biological Engineering, Jimei University, Xiamen, 361021, China; Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Xiamen, 361021, China; Research Center of Food Biotechnology of Xiamen City, Xiamen, 361021, China
| | - Mingjing Zheng
- College of Food and Biological Engineering, Jimei University, Xiamen, 361021, China; Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Xiamen, 361021, China; Research Center of Food Biotechnology of Xiamen City, Xiamen, 361021, China
| | - Hui Ni
- College of Food and Biological Engineering, Jimei University, Xiamen, 361021, China; Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Xiamen, 361021, China; Research Center of Food Biotechnology of Xiamen City, Xiamen, 361021, China
| | - Qingbiao Li
- College of Food and Biological Engineering, Jimei University, Xiamen, 361021, China; Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Xiamen, 361021, China; Research Center of Food Biotechnology of Xiamen City, Xiamen, 361021, China
| | - Yanbing Zhu
- College of Food and Biological Engineering, Jimei University, Xiamen, 361021, China; Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Xiamen, 361021, China; Research Center of Food Biotechnology of Xiamen City, Xiamen, 361021, China.
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Becker J, Wittmann C. Metabolic Engineering of
Corynebacterium glutamicum. Metab Eng 2021. [DOI: 10.1002/9783527823468.ch12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Hoffmann SL, Kohlstedt M, Jungmann L, Hutter M, Poblete-Castro I, Becker J, Wittmann C. Cascaded valorization of brown seaweed to produce l-lysine and value-added products using Corynebacterium glutamicum streamlined by systems metabolic engineering. Metab Eng 2021; 67:293-307. [PMID: 34314893 DOI: 10.1016/j.ymben.2021.07.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 06/23/2021] [Accepted: 07/22/2021] [Indexed: 12/15/2022]
Abstract
Seaweeds emerge as promising third-generation renewable for sustainable bioproduction. In the present work, we valorized brown seaweed to produce l-lysine, the world's leading feed amino acid, using Corynebacterium glutamicum, which was streamlined by systems metabolic engineering. The mutant C. glutamicum SEA-1 served as a starting point for development because it produced small amounts of l-lysine from mannitol, a major seaweed sugar, because of the deletion of its arabitol repressor AtlR and its engineered l-lysine pathway. Starting from SEA-1, we systematically optimized the microbe to redirect excess NADH, formed on the sugar alcohol, towards NADPH, required for l-lysine synthesis. The mannitol dehydrogenase variant MtlD D75A, inspired by 3D protein homology modelling, partly generated NADPH during the oxidation of mannitol to fructose, leading to a 70% increased l-lysine yield in strain SEA-2C. Several rounds of strain engineering further increased NADPH supply and l-lysine production. The best strain, SEA-7, overexpressed the membrane-bound transhydrogenase pntAB together with codon-optimized gapN, encoding NADPH-dependent glyceraldehyde 3-phosphate dehydrogenase, and mak, encoding fructokinase. In a fed-batch process, SEA-7 produced 76 g L-1l-lysine from mannitol at a yield of 0.26 mol mol-1 and a maximum productivity of 2.1 g L-1 h-1. Finally, SEA-7 was integrated into seaweed valorization cascades. Aqua-cultured Laminaria digitata, a major seaweed for commercial alginate, was extracted and hydrolyzed enzymatically, followed by recovery and clean-up of pure alginate gum. The residual sugar-based mixture was converted to l-lysine at a yield of 0.27 C-mol C-mol-1 using SEA-7. Second, stems of the wild-harvested seaweed Durvillaea antarctica, obtained as waste during commercial processing of the blades for human consumption, were extracted using acid treatment. Fermentation of the hydrolysate using SEA-7 provided l-lysine at a yield of 0.40 C-mol C-mol-1. Our findings enable improvement of the efficiency of seaweed biorefineries using tailor-made C. glutamicum strains.
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Affiliation(s)
- Sarah Lisa Hoffmann
- Institute of Systems Biotechnology, Saarland University, Saarbrücken, Germany
| | - Michael Kohlstedt
- Institute of Systems Biotechnology, Saarland University, Saarbrücken, Germany
| | - Lukas Jungmann
- Institute of Systems Biotechnology, Saarland University, Saarbrücken, Germany
| | - Michael Hutter
- Centre for Bioinformatics, Saarland University, Saarbrücken, Germany
| | | | - Judith Becker
- Institute of Systems Biotechnology, Saarland University, Saarbrücken, Germany
| | - Christoph Wittmann
- Institute of Systems Biotechnology, Saarland University, Saarbrücken, Germany.
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50
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Nguyen PKT, Kim J, Das G, Yoon HH, Lee DH. Optimization of simultaneous dark fermentation and microbial electrolysis cell for hydrogen production from macroalgae using response surface methodology. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2021.108029] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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