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Huang A, Chen Z, Wu X, Yan W, Lu F, Liu F. Improving the thermal stability and catalytic activity of ulvan lyase by the combination of FoldX and KnowVolution campaign. Int J Biol Macromol 2024; 257:128577. [PMID: 38070809 DOI: 10.1016/j.ijbiomac.2023.128577] [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: 08/09/2023] [Revised: 11/22/2023] [Accepted: 12/01/2023] [Indexed: 01/26/2024]
Abstract
Thermal stability is one of the most important properties of ulvan lyases for their application in algae biomass degradation. The Knowledge gaining directed eVolution (KnowVolution) protein engineering strategy could be employed to improve thermostability of ulvan lyase with less screening effort. Herein, the unfolding free energies (ΔΔG) of the loop region were calculated using FoldX and four sites (D103, G104, T113, Q229) were selected for saturation mutagenesis, resulting in the identification of a favorable single-site mutant Q229M. Subsequently, iteration mutation was carried out with the mutant N57P (previously obtained by our group) to further enhance the performance of ulvan lyase. The results showed that the most beneficial variant N57P/Q229M exhibited a 1.67-fold and 2-fold increase in residual activity compared to the wild type after incubation at 40 °C and 50 °C for 1 h, respectively. In addition, the variant produced 1.06 mg/mL of reducing sugar in 2 h, which was almost four times as much as the wild type. Molecular dynamics simulations revealed that N57P/Q229M mutant enhanced the structural rigidity by augmenting intramolecular hydrogen bonds. Meanwhile, the shorter proton transmission distance between the general base of the enzyme and the substrate contributed to the glycosidic bond breakage. Our research showed that in silico saturation mutagenesis using position scan module in FoldX allowed for faster screening of mutants with improved thermal stability, and combining it with KnowVolution enabled a balanced effect of thermal stability and enzyme activity in protein engineering.
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Affiliation(s)
- Ailan Huang
- College of Biotechnology, Tianjin University of Science & Technology, Tianjin, PR China
| | - Zhengqi Chen
- College of Biotechnology, Tianjin University of Science & Technology, Tianjin, PR China
| | - Xinming Wu
- College of Biotechnology, Tianjin University of Science & Technology, Tianjin, PR China
| | - Wenxing Yan
- College of Biotechnology, Tianjin University of Science & Technology, Tianjin, PR China
| | - Fuping Lu
- College of Biotechnology, Tianjin University of Science & Technology, Tianjin, PR China; Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, Tianjin, PR China
| | - Fufeng Liu
- College of Biotechnology, Tianjin University of Science & Technology, Tianjin, PR China; Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, Tianjin, PR China.
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Krishna Perumal P, Dong CD, Chauhan AS, Anisha GS, Kadri MS, Chen CW, Singhania RR, Patel AK. Advances in oligosaccharides production from algal sources and potential applications. Biotechnol Adv 2023; 67:108195. [PMID: 37315876 DOI: 10.1016/j.biotechadv.2023.108195] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 06/02/2023] [Accepted: 06/05/2023] [Indexed: 06/16/2023]
Abstract
In recent years, algal-derived glycans and oligosaccharides have become increasingly important in health applications due to higher bioactivities than plant-derived oligosaccharides. The marine organisms have complex, and highly branched glycans and more reactive groups to elicit greater bioactivities. However, complex and large molecules have limited use in broad commercial applications due to dissolution limitations. In comparison to these, oligosaccharides show better solubility and retain their bioactivities, hence, offering better applications opportunity. Accordingly, efforts are being made to develop a cost-effective method for enzymatic extraction of oligosaccharides from algal polysaccharides and algal biomass. Yet detailed structural characterization of algal-derived glycans is required to produce and characterize the potential biomolecules for improved bioactivity and commercial applications. Some macroalgae and microalgae are being evaluated as in vivo biofactories for efficient clinical trials, which could be very helpful in understanding the therapeutic responses. This review discusses the recent advancements in the production of oligosaccharides from microalgae. It also discusses the bottlenecks of the oligosaccharides research, technological limitations, and probable solutions to these problems. Furthermore, it presents the emerging bioactivities of algal oligosaccharides and their promising potential for possible biotherapeutic application.
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Affiliation(s)
- Pitchurajan Krishna Perumal
- Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan
| | - Cheng-Di Dong
- Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; Sustainable Environment Research Centre, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan
| | - Ajeet Singh Chauhan
- Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan
| | - Grace Sathyanesan Anisha
- Post-Graduate and Research Department of Zoology, Government College for Women, Thiruvananthapuram 695014, Kerala, India
| | - Mohammad Sibtain Kadri
- Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung City-804201, Taiwan
| | - Chiu-Wen Chen
- Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; Sustainable Environment Research Centre, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan
| | - Reeta Rani Singhania
- Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; Centre for Energy and Environmental Sustainability, Lucknow 226 029, Uttar Pradesh, India
| | - Anil Kumar Patel
- Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; Centre for Energy and Environmental Sustainability, Lucknow 226 029, Uttar Pradesh, India.
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Shah S, Famta P, Shahrukh S, Jain N, Vambhurkar G, Srinivasarao DA, Raghuvanshi RS, Singh SB, Srivastava S. Multifaceted applications of ulvan polysaccharides: Insights on biopharmaceutical avenues. Int J Biol Macromol 2023; 234:123669. [PMID: 36796555 DOI: 10.1016/j.ijbiomac.2023.123669] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 01/31/2023] [Accepted: 02/09/2023] [Indexed: 02/16/2023]
Abstract
Ulvans are water-soluble sulfated polysaccharides predominantly found in the cell wall of green algae. They hold unique characteristics that are attributed to their 3D conformation, functional groups along with the presence of saccharides and sulfate ions. Traditionally, ulvans are widely used as food supplements and probiotics owing to the high content of carbohydrates. Despite their widespread usage in food industry, an in-depth understanding is required for extrapolating their potential application as a nutraceutical and medicinal agent which could be beneficial in promoting human health and well-being. This review emphasizes novel therapeutic avenues where ulvan polysaccharides can be used beyond their nutritional applications. A collection of literature points towards multifarious applications of ulvan in various biomedical fields. Structural aspects along with extraction and purification methods have been discussed. The underlying molecular mechanisms associated with its biomedical potential in different therapeutic fields like oncology, infectious diseases, inflammation, neuroprotection and tissue engineering, etc. have been unravelled. Challenges associated with clinical translation and future perspectives have been deliberated.
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Affiliation(s)
- Saurabh Shah
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Paras Famta
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Syed Shahrukh
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Naitik Jain
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Ganesh Vambhurkar
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Dadi A Srinivasarao
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Rajeev Singh Raghuvanshi
- Indian Pharmacopoeia Commission, Ministry of Health & Family Welfare, Government of India, India
| | - Shashi Bala Singh
- Department of Biological Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Saurabh Srivastava
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India.
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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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Zarraonaindia I, Cretazzo E, Mena-Petite A, Díez-Navajas AM, Pérez-López U, Lacuesta M, Pérez-Álvarez EP, Puertas B, Fernandez-Diaz C, Bertazzon N, Cantos-Villar E. Holistic understanding of the response of grapevines to foliar application of seaweed extracts. FRONTIERS IN PLANT SCIENCE 2023; 14:1119854. [PMID: 36923130 PMCID: PMC10010106 DOI: 10.3389/fpls.2023.1119854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 02/06/2023] [Indexed: 06/18/2023]
Abstract
Viticulture is highly dependent on phytochemicals to maintain good vineyard health. However, to reduce their accumulation in the environment, green regulations are driving the development of eco-friendly strategies. In this respect, seaweeds have proven to be one of the marine resources with the highest potential as plant protective agents, representing an environmentally-friendly alternative approach for sustainable wine production. The current work follows an interdisciplinary framework to evaluate the capacity of Ulva ohnoi and Rugulopteryx okamurae seaweeds to induce defense mechanisms in grapevine plants. To our knowledge, this is the first study to evaluate Rugulopteryx okamurae as a biostimulator . This macroalgae is relevant since it is an invasive species on the Atlantic and Mediterranean coast causing incalculable economic and environmental burdens. Four extracts (UL1, UL2, RU1 and RU2 developed from Ulva and Rugulopteryx, respectively) were foliar applied to Tempranillo plants cultivated under greenhouse conditions. UL1 and RU2 stood out for their capacity to induce defense genes, such as a PR10, PAL, STS48 and GST1, mainly 24 hours after the first application. The increased expression level of these genes agreed with i) an increase in trans-piceid and trans-resveratrol content, mainly in the RU2 treated leaves, and, ii) an increase in jasmonic acid and decrease in salicylic acid. Moreover, an induction of the activity of the antioxidant enzymes was observed at the end of the experiment, with an increase in superoxide dismutase and catalase in the RU2-treated leaves in particular. Interestingly, while foliar fungal diversity was not influenced by the treatments, alga extract amendment modified fungal composition, RU2 application enriching the content of various groups known for their biocontrol activity. Overall, the results evidenced the capacity of Rugulopteryx okamurae for grapevine biostimulation, inducing the activation of several secondary metabolite pathways and promoting the abundance of beneficial microbiota involved in grapevine protection. While further studies are needed to unravel the bioactive compound(s) involved, including conducting field experiments etc., the current findings are the first steps towards the inclusion of Rugulopteryx okamurae in a circular scheme that would reduce its accumulation on the coast and benefit the viticulture sector at the same time.
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Affiliation(s)
- Iratxe Zarraonaindia
- Department of Genetics, Physical Anthropology and Animal Physiology, Faculty of Science and Technology, University of the Basque Country Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Leioa (Bizkaia), Spain
- IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
| | - Enrico Cretazzo
- Instituto de Investigación y Formación Agraria y Pesquera (IFAPA) Rancho de la Merced, Consejería de Agricultura, Pesca, Agua y Desarrollo Rural, Junta de Andalucía, Cádiz, Spain
| | - Amaia Mena-Petite
- Department of Plant Biology and Ecology, Faculty of Pharmacy, University of the Basque Country Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Vitoria-Gasteiz (Araba), Spain
| | - Ana M. Díez-Navajas
- Department of Plant Production and Protection, Instituto Vasco de Investigación y Desarrollo (NEIKER)-Basque Institute of Agricultural Research and Development, Basque Research and Technology Alliance (BRTA), Arkaute (Araba), Spain
| | - Usue Pérez-López
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Leioa (Bizkaia), Spain
| | - Maite Lacuesta
- Department of Plant Biology and Ecology, Faculty of Pharmacy, University of the Basque Country Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Vitoria-Gasteiz (Araba), Spain
| | - Eva Pilar Pérez-Álvarez
- VIENAP Group, Instituto Vasco de Investigación y Desarrollo (ICVV), Carretera de Burgos, Logroño, Spain
| | - Belén Puertas
- Instituto de Investigación y Formación Agraria y Pesquera (IFAPA) Rancho de la Merced, Consejería de Agricultura, Pesca, Agua y Desarrollo Rural, Junta de Andalucía, Cádiz, Spain
| | - Catalina Fernandez-Diaz
- Instituto de Investigación y Formación Agraria y Pesquera (IFAPA) El Toruño, Consejería de Agricultura, Pesca, Agua y Desarrollo Rural, Junta de Andalucía, Cádiz, Spain
| | - Nadia Bertazzon
- The Council for Agricultural Research and Economics (CREA), Research Centre for Viticulture and Enology, Conegliano, Italy
| | - Emma Cantos-Villar
- Instituto de Investigación y Formación Agraria y Pesquera (IFAPA) Rancho de la Merced, Consejería de Agricultura, Pesca, Agua y Desarrollo Rural, Junta de Andalucía, Cádiz, Spain
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Jagtap AS, Parab AS, Manohar CS, Kadam NS. Prebiotic potential of enzymatically produced ulvan oligosaccharides using ulvan lyase of Bacillus subtilis, NIOA181, a macroalgae-associated bacteria. J Appl Microbiol 2022; 133:3176-3190. [PMID: 35957555 DOI: 10.1111/jam.15775] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 07/18/2022] [Accepted: 08/09/2022] [Indexed: 11/28/2022]
Abstract
AIMS To characterize the polysaccharide hydrolyzing potential of macroalgae-associated bacteria (MABs) for enzymatic production of oligosaccharides and determining their prebiotic potential. METHODS AND RESULTS Approximately 400 MABs were qualitatively characterised for polysaccharide hydrolyzing activity. Only about 5 to 15% of the isolates were found to have the potential for producing porphyranase, alginate lyase and ulvan lyase enzymes which were quantified in specific substrate broths. One potential MAB, Bacillus subtilis, NIOA181, isolated from green macroalgae, showed the highest ulvan lyase activity. This enzyme was partially purified and used to hydrolyse ulvan into ulvan oligosaccharides. Structural characterization of ulvan oligosaccharides showed that they are predominantly composed of di-, tri-, and tetrasaccharide units. Results showed that the enzymatically produced ulvan oligosaccharides exhibited prebiotic activity by promoting the growth of probiotic bacteria and suppressing the enteric pathogens, which were higher than the ulvan polysaccharide and equivalent to commercial fructooligosaccharides. CONCLUSIONS A potential MAB, NIOA181, producing ulvan lyase was isolated and used for the production of ulvan oligosaccharides with prebiotic activity. SIGNIFICANCE AND IMPACT OF STUDY Rarely studied ulvan oligosaccharides with prebiotic activity can be widely used as an active pharmaceutical ingredient in nutraceutical and other healthcare applications.
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Affiliation(s)
- Ashok S Jagtap
- Biological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa, India.,School of Earth, Ocean and Atmospheric Sciences, Goa University, Taleigao Plateau, Goa, India
| | - Ashutosh S Parab
- Biological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa, India.,School of Earth, Ocean and Atmospheric Sciences, Goa University, Taleigao Plateau, Goa, India
| | - Cathrine S Manohar
- Biological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa, India
| | - Nitin S Kadam
- Central Instrumentation Facility, Savitribai Phule Pune University, Pune, India
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Isolation, Diversity and Characterization of Ulvan-Degrading Bacteria Isolated from Marine Environments. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27113420. [PMID: 35684358 PMCID: PMC9182395 DOI: 10.3390/molecules27113420] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/28/2022] [Accepted: 05/24/2022] [Indexed: 11/29/2022]
Abstract
In this study, we aimed to isolate bacteria capable of degrading the polysaccharide ulvan from the green algae Ulva sp. (Chlorophyta, Ulvales, Ulvaceae) in marine environments. We isolated 13 ulvan-degrading bacteria and observed high diversity at the genus level. Further, the genera Paraglaciecola, Vibrio, Echinicola, and Algibacter, which can degrade ulvan, were successfully isolated for the first time from marine environments. Among the 13 isolates, only one isolate (Echinicola sp.) showed the ability not only to produce externally expressed ulvan lyase, but also to be periplasmic or on the cell surface. From the results of the full-genome analysis, lyase was presumed to be a member of the PL25 (BNR4) family of ulvan lyases, and the bacterium also contained the sequence for glycoside hydrolase (GH43, GH78 and GH88), which is characteristic of other ulvan-degrading bacteria. Notably, this bacterium has a unique ulvan lyase gene not previously reported.
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Li J, He Z, Liang Y, Peng T, Hu Z. Insights into Algal Polysaccharides: A Review of Their Structure, Depolymerases, and Metabolic Pathways. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:1749-1765. [PMID: 35124966 DOI: 10.1021/acs.jafc.1c05365] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In recent years, marine macroalgae with extensive biomass have attracted the attention of researchers worldwide. Furthermore, algal polysaccharides have been widely studied in the food, pharmaceutical, and cosmetic fields because of their various kinds of bioactivities. However, there are immense barriers to their application as a result of their high molecular size, poor solubility, hydrocolloid nature, and low physiological activities. Unique polysaccharides, such as laminarin, alginate, fucoidan, agar, carrageenan, porphyran, ulvan, and other complex structural polysaccharides, can be digested by marine bacteria with many carbohydrate-active enzymes (CAZymes) by breaking down the limitation of glycosidic bonds. However, structural elucidation of algal polysaccharides, metabolic pathways, and identification of potential polysaccharide hydrolases that participate in different metabolic pathways remain major obstacles restricting the efficient utilization of algal oligosaccharides. This review focuses on the structure, hydrolase families, metabolic pathways, and potential applications of seven macroalgae polysaccharides. These results will contribute to progressing our understanding of the structure of algal polysaccharides and their metabolic pathways and will be valuable for clearing the way for the compelling utilization of bioactive oligosaccharides.
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Affiliation(s)
- Jin Li
- Department of Biology, College of Science, Shantou University, Shantou, Guangdong 515063, People's Republic of China
| | - Zhixiao He
- Department of Biology, College of Science, Shantou University, Shantou, Guangdong 515063, People's Republic of China
| | - Yumei Liang
- Department of Biology, College of Science, Shantou University, Shantou, Guangdong 515063, People's Republic of China
| | - Tao Peng
- Department of Biology, College of Science, Shantou University, Shantou, Guangdong 515063, People's Republic of China
| | - Zhong Hu
- Department of Biology, College of Science, Shantou University, Shantou, Guangdong 515063, People's Republic of China
- Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, Guangdong 511458, People's Republic of China
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Marine microbial enzymes for the production of algal oligosaccharides and its bioactive potential for application as nutritional supplements. Folia Microbiol (Praha) 2022; 67:175-191. [PMID: 34997524 DOI: 10.1007/s12223-021-00943-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 12/20/2021] [Indexed: 01/02/2023]
Abstract
Marine macroalgae have a very high carbohydrate content due to complex algal polysaccharides (APS) like agar, alginate, and ulvan in their cell wall. Despite numerous reports on their biomedical properties, their hydrocolloid nature limits their applications. Algal oligosaccharides (AOS), which are hydrolyzed forms of complex APS, are gaining importance due to their low molecular weight, biocompatibility, bioactivities, safety, and solubility in water that makes it a lucrative alternative. The AOS produced through enzymatic hydrolysis using microbial enzymes have far-reaching applications because of its stereospecific nature. Identification and characterization of novel microorganisms producing APS hydrolyzing enzymes are the major bottlenecks for the efficient production of AOS. This review will discuss the marine microbial enzymes identified for AOS production and the bioactive potential of enzymatically produced AOS. This can improve our understanding of the biotechnological potential of microbial enzymes for the production of AOS and facilitate the sustainable utilization of algal biomass. Enzymatically produced AOS are shown to have bioactivities such as antioxidant, antiglycemic, prebiotic, immunomodulation, antiobesity or antihypercholesterolemia, anti-inflammatory, anticancer, and antimicrobial activity. The myriad of health benefits provided by the AOS is the need of the hour as there is an alarming increase in physiological disorders among a wide range of the global population.
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Tang T, Cao S, Zhu B, Li Q. Ulvan polysaccharide-degrading enzymes: An updated and comprehensive review of sources category, property, structure, and applications of ulvan lyases. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102477] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Rosmarinic Acid and Ulvan from Terrestrial and Marine Sources in Anti-Microbial Bionanosystems and Biomaterials. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11199249] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In order to increase their sustainability, antimicrobial renewable molecules are fundamental additions to consumer goods. Rosmarinic acid is extracted from several terrestrial plants and represents an effective anti-microbial agent. Ulvan, extracted from algae, is an anti-microbial polysaccharide. The present review is dedicated to discussing the sources and the extraction methodologies for obtaining rosmarinic acid and ulvan. Moreover, the preparation of bioanosystems, integrating the two molecules with organic or inorganic substrates, are reviewed as methodologies to increase their effectiveness and stability. Finally, the possibility of preparing functional biomaterials and anti-microbial final products is discussed, considering scientific literature. The performed analysis indicated that the production of both molecules is not yet performed with mature industrial technologies. Nevertheless, both molecules could potentially be used in the packaging, biomedical, pharmaceutical, cosmetic, sanitary and personal care sectors, despite some research being required for developing functional materials with specific properties to pave the way for many more applications.
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Production of Ulvan Oligosaccharides with Antioxidant and Angiotensin-Converting Enzyme-Inhibitory Activities by Microbial Enzymatic Hydrolysis. FERMENTATION-BASEL 2021. [DOI: 10.3390/fermentation7030160] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Seaweed oligosaccharides have attracted attention in food, agricultural, and medical applications recently. Compared to red and brown seaweeds, fewer studies have focused on the biological activity of green seaweed’s oligosaccharides. This study aimed to produce bioactive ulvan oligosaccharides via enzymatic hydrolysis from green seaweed Ulva lactuca. Ulvan, a water-soluble polysaccharide, was obtained by hot water extraction. Two isolated marine bacteria, Pseudomonas vesicularis MA103 and Aeromonas salmonicida MAEF108, were used to produce multiple hydrolases, such as ulvanolytic enzymes, amylase, cellulase, and xylanase, to degrade the ulvan extract. An ultrafiltration system was used to separate the enzymatic hydrolysate to acquire the ulvan oligosaccharides (UOS). The characteristics of the ulvan extract and the UOS were determined by yield, reducing sugar, uronic acid, sulfate group, and total phenols. The FT-IR spectrum indicated that the ulvan extract and the UOS presented the bands associated with O-H, C=O, C-O, and S=O stretching. Angiotensin I converting enzyme (ACE) inhibition and antioxidant activities in vitro were evaluated in the ulvan extract and the UOS. These results provide a practical approach to producing bioactive UOS by microbial enzymatic hydrolysis that can benefit the development of seaweed-based products at the industrial scale.
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Xie XT, Cheong KL. Recent advances in marine algae oligosaccharides: structure, analysis, and potential prebiotic activities. Crit Rev Food Sci Nutr 2021; 62:7703-7717. [PMID: 33939558 DOI: 10.1080/10408398.2021.1916736] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Marine algae contain abundant polysaccharides that support a range of health-promoting activities; however, the high molecular weight, high viscosity, and low solubility of marine algae polysaccharides (MAPs) limit their application in food, agriculture and medicine. Thus, as the degradation products of MAPs, marine algae oligosaccharides (MAOs) have drawn increasing attention. Most MAOs are non-digestible by digestive enzyme in the human gastrointestinal tract, but are fermented by bacteria in the gut and converted into short-chain fatty acids (SCFAs). MAOs can selectively enhance the activities of some populations of beneficial bacteria and stimulate a series of prebiotic effects, such as anti-oxidant, anti-diabetic, anti-tumour. However, the exact structures of MAOs and their prebiotic activities are, to a large extent, unexplored. This review summarizes recent advances in the sources, categories, and structure analysis methods of MAOs, emphasizing their effects on gut microbiota and its metabolite SCFAs as well as the resulting range of probiotic activities.
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Affiliation(s)
- Xu-Ting Xie
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Institute of Marine Sciences, Shantou University, Shantou, Guangdong, PR China
| | - Kit-Leong Cheong
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Institute of Marine Sciences, Shantou University, Shantou, Guangdong, PR China
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Callejo-López J, Ramírez M, Cantero D, Bolívar J. Versatile method to obtain protein- and/or amino acid-enriched extracts from fresh biomass of recalcitrant microalgae without mechanical pretreatment. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.102010] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Qiao L, Yang X, Xie R, Du C, Chi Y, Zhang J, Wang P. Efficient production of ulvan lyase from Ulva prolifera by Catenovulum sp. LP based on stage-controlled fermentation strategy. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.101812] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Li Q, Hu F, Zhu B, Ni F, Yao Z. Insights into ulvan lyase: review of source, biochemical characteristics, structure and catalytic mechanism. Crit Rev Biotechnol 2020; 40:432-441. [PMID: 32050804 DOI: 10.1080/07388551.2020.1723486] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Ulvan, a kind of polyanionic heteropolysaccharide consisting of 3-sulfated rhamnose, uronic acids (iduronic acid and glucuronic acid) and xylose, has been widely applied in food and cosmetic industries. In addition, ulvan can be converted into fermentable monosaccharides through the cascade system of carbohydrate-active enzymes. Ulvan lyases can degrade ulvan into ulvan oligosaccharides, which is the first step in the fully degradation of ulvan. Various ulvan lyases have been cloned and characterized from marine bacteria and grouped into five polysaccharide lyase (PL) families, namely: PL24, PL25, PL28, PL37 and PL40 families. The elucidation of the biochemical characterization, action pattern and catalytic mechanism of ulvan lyase would definitely enhance our understanding of the deep utilization of marine bioresource and marine carbon cycling. In this review, we summarized the recent progresses about the source and biochemical characteristics of ulvan lyase. Additionally, the structural characteristics and catalytic mechanisms have been introduced in detail. This comprehensive information should be helpful regarding the application of ulvan lyases.
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Affiliation(s)
- Qian Li
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing, P.R. China
| | - Fu Hu
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing, P.R. China
| | - Benwei Zhu
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing, P.R. China
| | - Fang Ni
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing, P.R. China
| | - Zhong Yao
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing, P.R. China
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Production of Active Poly- and Oligosaccharidic Fractions from Ulva sp. by Combining Enzyme-Assisted Extraction (EAE) and Depolymerization. Metabolites 2019; 9:metabo9090182. [PMID: 31547343 PMCID: PMC6780239 DOI: 10.3390/metabo9090182] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 09/08/2019] [Accepted: 09/10/2019] [Indexed: 12/26/2022] Open
Abstract
Data on fractionation and depolymerization of the matrix ulvan polysaccharides, and studies on the biological activities on skin cells, are very scarce. In this work, crude ulvans were produced by using EAE (enzyme-assisted extraction) and compared to maceration (an established procedure). After different fractionation procedures-ethanolic precipitation, dialysis, or ammonium sulfate precipitation-the biochemical composition showed that EAE led to an increased content in ulvans. Coupling EAE to sulfate ammonium precipitation led to protein enrichment. Oligosaccharides were obtained by using radical depolymerization by H2O2 and ion-exchange resin depolymerization. Sulfate groups were partially cleaved during these chemical treatments. The potential bioactivity of the fractions was assessed using a lipoxygenase inhibition assay for anti-inflammatory activity and a WST-1 assay for human dermal fibroblast viability and proliferation. All ulvans extracts, poly- and oligosaccharidic fractions from EAE, expanded the fibroblast proliferation rate up to 62%. Our research emphasizes the potential use of poly- and oligosaccharidic fractions of Ulva sp. for further development in cosmetic applications.
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Cui J, Lian Y, Zhao C, Du H, Han Y, Gao W, Xiao H, Zheng J. Dietary Fibers from Fruits and Vegetables and Their Health Benefits via Modulation of Gut Microbiota. Compr Rev Food Sci Food Saf 2019; 18:1514-1532. [DOI: 10.1111/1541-4337.12489] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 06/13/2019] [Accepted: 07/10/2019] [Indexed: 02/06/2023]
Affiliation(s)
- Jiefen Cui
- Inst. of Food Science and TechnologyChinese Academy of Agricultural Sciences Beijing 100193 China
| | - Yunhe Lian
- Research and Development Dept.Chenguang Biotech Group Co., Ltd. Hebei 057250 China
| | - Chengying Zhao
- Inst. of Food Science and TechnologyChinese Academy of Agricultural Sciences Beijing 100193 China
| | - Hengjun Du
- Dept. of Food ScienceUniv. of Massachusetts Amherst MA 01003 U.S.A
| | - Yanhui Han
- Dept. of Food ScienceUniv. of Massachusetts Amherst MA 01003 U.S.A
| | - Wei Gao
- Research and Development Dept.Chenguang Biotech Group Co., Ltd. Hebei 057250 China
| | - Hang Xiao
- Dept. of Food ScienceUniv. of Massachusetts Amherst MA 01003 U.S.A
| | - Jinkai Zheng
- Inst. of Food Science and TechnologyChinese Academy of Agricultural Sciences Beijing 100193 China
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Cherry P, Yadav S, Strain CR, Allsopp PJ, McSorley EM, Ross RP, Stanton C. Prebiotics from Seaweeds: An Ocean of Opportunity? Mar Drugs 2019; 17:E327. [PMID: 31159359 PMCID: PMC6627129 DOI: 10.3390/md17060327] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 05/27/2019] [Accepted: 05/29/2019] [Indexed: 02/07/2023] Open
Abstract
Seaweeds are an underexploited and potentially sustainable crop which offer a rich source of bioactive compounds, including novel complex polysaccharides, polyphenols, fatty acids, and carotenoids. The purported efficacies of these phytochemicals have led to potential functional food and nutraceutical applications which aim to protect against cardiometabolic and inflammatory risk factors associated with non-communicable diseases, such as obesity, type 2 diabetes, metabolic syndrome, cardiovascular disease, inflammatory bowel disease, and some cancers. Concurrent understanding that perturbations of gut microbial composition and metabolic function manifest throughout health and disease has led to dietary strategies, such as prebiotics, which exploit the diet-host-microbe paradigm to modulate the gut microbiota, such that host health is maintained or improved. The prebiotic definition was recently updated to "a substrate that is selectively utilised by host microorganisms conferring a health benefit", which, given that previous discussion regarding seaweed prebiotics has focused upon saccharolytic fermentation, an opportunity is presented to explore how non-complex polysaccharide components from seaweeds may be metabolised by host microbial populations to benefit host health. Thus, this review provides an innovative approach to consider how the gut microbiota may utilise seaweed phytochemicals, such as polyphenols, polyunsaturated fatty acids, and carotenoids, and provides an updated discussion regarding the catabolism of seaweed-derived complex polysaccharides with potential prebiotic activity. Additional in vitro screening studies and in vivo animal studies are needed to identify potential prebiotics from seaweeds, alongside untargeted metabolomics to decipher microbial-derived metabolites from seaweeds. Furthermore, controlled human intervention studies with health-related end points to elucidate prebiotic efficacy are required.
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Affiliation(s)
- Paul Cherry
- Nutrition Innovation Centre for Food and Health, Ulster University, Cromore Road, Coleraine, Co. Londonderry BT52 1SA, UK.
- Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, P61 C996, Ireland.
- APC Microbiome Ireland, University College Cork, Cork T12 YT20, Ireland.
| | - Supriya Yadav
- Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, P61 C996, Ireland.
| | - Conall R Strain
- Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, P61 C996, Ireland.
- APC Microbiome Ireland, University College Cork, Cork T12 YT20, Ireland.
| | - Philip J Allsopp
- Nutrition Innovation Centre for Food and Health, Ulster University, Cromore Road, Coleraine, Co. Londonderry BT52 1SA, UK.
| | - Emeir M McSorley
- Nutrition Innovation Centre for Food and Health, Ulster University, Cromore Road, Coleraine, Co. Londonderry BT52 1SA, UK.
| | - R Paul Ross
- APC Microbiome Ireland, University College Cork, Cork T12 YT20, Ireland.
- College of Science, Engineering and Food Science, University College Cork, Cork T12 K8AF, Ireland.
| | - Catherine Stanton
- Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, P61 C996, Ireland.
- APC Microbiome Ireland, University College Cork, Cork T12 YT20, Ireland.
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20
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Optimization of Microwave-Assisted Extraction of Polysaccharides from Ulva pertusa and Evaluation of Their Antioxidant Activity. Antioxidants (Basel) 2019; 8:antiox8050129. [PMID: 31091698 PMCID: PMC6562377 DOI: 10.3390/antiox8050129] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 05/10/2019] [Accepted: 05/11/2019] [Indexed: 01/18/2023] Open
Abstract
The use of green marine seaweed Ulva spp. as foods, feed supplements, and functional ingredients has gained increasing interest. Microwave-assisted extraction technology was employed to improve the extraction yield and composition of Ulva pertusa polysaccharides. The antioxidant activity of ulvan was also evaluated. The impacts of four independent variables, i.e., extraction time (X1, 30 to 60 min), power (X2, 500 to 700 W), water-to-raw-material ratio (X3, 40 to 70), and pH (X4, 5 to 7) were evaluated. The chemical structure of different polysaccharides fractions was investigated via FT-IR and the determination of their antioxidant activities. A response surface methodology based on a Box–Behnken design (BBD) was used to optimize the extraction conditions as follows: extraction time of 43.63 min, power level of 600 W, water-to-raw-material ratio of 55.45, pH of 6.57, and maximum yield of 41.91%, with a desired value of 0.381. Ulvan exerted a strong antioxidant effect against 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) and showed reducing power in vitro. Ulvan protected RAW 264.7 cells against H2O2-induced oxidative stress by upregulating the expression and enhancing the activity of oxidative enzymes such as superoxide dismutase (SOD) and superoxide dismutase (CAT). The results suggest that the polysaccharides from U. pertusa might be promising bioactive compounds for commercial use.
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Postma PR, Cerezo-Chinarro O, Akkerman RJ, Olivieri G, Wijffels RH, Brandenburg WA, Eppink MHM. Biorefinery of the macroalgae Ulva lactuca: extraction of proteins and carbohydrates by mild disintegration. JOURNAL OF APPLIED PHYCOLOGY 2018; 30:1281-1293. [PMID: 29755208 PMCID: PMC5928186 DOI: 10.1007/s10811-017-1319-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 10/17/2017] [Accepted: 10/17/2017] [Indexed: 05/13/2023]
Abstract
The effect of osmotic shock, enzymatic incubation, pulsed electric field, and high shear homogenization on the release of water-soluble proteins and carbohydrates from the green alga Ulva lactuca was investigated in this screening study. For osmotic shock, both temperature and incubation time had a significant influence on the release with an optimum at 30 °C for 24 h of incubation. For enzymatic incubation, pectinase demonstrated being the most promising enzyme for both protein and carbohydrate release. Pulsed electric field treatment was most optimal at an electric field strength of 7.5 kV cm-1 with 0.05 ms pulses and a specific energy input relative to the released protein as low as 6.6 kWh kgprot-1. Regarding literature, this study reported the highest protein (~ 39%) and carbohydrate (~ 51%) yields of the four technologies using high shear homogenization. Additionally, an energy reduction up to 86% was achieved by applying a novel two-phase (macrostructure size reduction and cell disintegration) technique.
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Affiliation(s)
- P. R. Postma
- Bioprocess Engineering, AlgaePARC, Wageningen University, PO Box 16, 6700 AA Wageningen, the Netherlands
| | - O. Cerezo-Chinarro
- Bioprocess Engineering, AlgaePARC, Wageningen University, PO Box 16, 6700 AA Wageningen, the Netherlands
| | - R. J. Akkerman
- Bioprocess Engineering, AlgaePARC, Wageningen University, PO Box 16, 6700 AA Wageningen, the Netherlands
| | - G. Olivieri
- Bioprocess Engineering, AlgaePARC, Wageningen University, PO Box 16, 6700 AA Wageningen, the Netherlands
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli Federico II, Piazzale V. Tecchio 80, 80125 Naples, Italy
| | - R. H. Wijffels
- Bioprocess Engineering, AlgaePARC, Wageningen University, PO Box 16, 6700 AA Wageningen, the Netherlands
- Nord University, Faculty of Biosciences and Aquaculture, N-8049 Bodø, Norway
| | - W. A. Brandenburg
- Agrosystems Research, Plant Research International, Wageningen University and Research Centre, PO Box 16, 6700 AA Wageningen, the Netherlands
| | - M. H. M. Eppink
- Bioprocess Engineering, AlgaePARC, Wageningen University, PO Box 16, 6700 AA Wageningen, the Netherlands
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22
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The development of seaweed-derived bioactive compounds for use as prebiotics and nutraceuticals using enzyme technologies. Trends Food Sci Technol 2017. [DOI: 10.1016/j.tifs.2017.10.002] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Fernández-Díaz C, Coste O, Malta EJ. Polymer chitosan nanoparticles functionalized with Ulva ohnoi extracts boost in vitro ulvan immunostimulant effect in Solea senegalensis macrophages. ALGAL RES 2017. [DOI: 10.1016/j.algal.2017.07.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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24
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Trincone A. Enzymatic Processes in Marine Biotechnology. Mar Drugs 2017; 15:E93. [PMID: 28346336 PMCID: PMC5408239 DOI: 10.3390/md15040093] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 03/16/2017] [Accepted: 03/20/2017] [Indexed: 12/13/2022] Open
Abstract
In previous review articles the attention of the biocatalytically oriented scientific community towards the marine environment as a source of biocatalysts focused on the habitat-related properties of marine enzymes. Updates have already appeared in the literature, including marine examples of oxidoreductases, hydrolases, transferases, isomerases, ligases, and lyases ready for food and pharmaceutical applications. Here a new approach for searching the literature and presenting a more refined analysis is adopted with respect to previous surveys, centering the attention on the enzymatic process rather than on a single novel activity. Fields of applications are easily individuated: (i) the biorefinery value-chain, where the provision of biomass is one of the most important aspects, with aquaculture as the prominent sector; (ii) the food industry, where the interest in the marine domain is similarly developed to deal with the enzymatic procedures adopted in food manipulation; (iii) the selective and easy extraction/modification of structurally complex marine molecules, where enzymatic treatments are a recognized tool to improve efficiency and selectivity; and (iv) marine biomarkers and derived applications (bioremediation) in pollution monitoring are also included in that these studies could be of high significance for the appreciation of marine bioprocesses.
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Affiliation(s)
- Antonio Trincone
- Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, Via Campi Flegrei, 34, 80078 Pozzuoli, Naples, Italy.
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Peasura N, Laohakunjit N, Kerdchoechuen O, Vongsawasdi P, Chao LK. Assessment of biochemical and immunomodulatory activity of sulphated polysaccharides from Ulva intestinalis. Int J Biol Macromol 2016; 91:269-77. [DOI: 10.1016/j.ijbiomac.2016.05.062] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Revised: 03/12/2016] [Accepted: 05/15/2016] [Indexed: 11/28/2022]
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Wang Y, Barth D, Tamminen A, Wiebe MG. Growth of marine fungi on polymeric substrates. BMC Biotechnol 2016; 16:3. [PMID: 26772742 PMCID: PMC4715362 DOI: 10.1186/s12896-016-0233-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 01/06/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Marine fungi are a diverse group of opportunistic and obligate organisms isolated from marine environments. These fungi are now often included in screens for novel metabolites, while less attention has been given to their production of hydrolytic enzymes. Most enzymes derived from marine microorganisms have been obtained from marine bacteria. The enzymes produced by marine fungi may have different properties than those derived from bacteria or from terrestrial fungi. Here we assess the growth of six filamentous marine fungi on a wide range of polymeric substrates as an indication of their general capacity to produce hydrolytic enzymes. RESULTS Calcarisporium sp. KF525, Tritirachium sp. LF562, Bartalinia robillardoides LF550, Penicillium pinophilum LF458, Scopulariopsis brevicaulis LF580 and Pestalotiopsis sp. KF079 all grew on both casein and gelatin as N-source, indicating secretion of proteases. All species also grew on starch, laminarin, xylan, pectin and oil, indicating production of amylases, glucanases, xylanases, pectinases and lipases. Growth on cellulose occurred but was weaker than on xylan. All strains also grew to some extent on sulphated arabinogalactan, although only LF562 could utilise arabinose. Four strains grew on the sulphated ulvans, whereas only KF525 grew on agar or carrageenan. KF525 and LF562 showed limited growth on alginate. Although fucose was used as carbon source by several species, fucoidan did not support biomass production. CONCLUSIONS Marine fungi could be excellent sources of a wide range of hydrolytic enzymes, including those able to hydrolyse various seaweed polymers. Although the native hosts may secrete only small amounts of these enzymes, the genes may provide a rich source of novel enzymes.
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Affiliation(s)
- Yanming Wang
- VTT Technical Research Centre of Finland, P.O. Box 1000, FI-02044 VTT, Espoo, Finland.
| | - Dorothee Barth
- VTT Technical Research Centre of Finland, P.O. Box 1000, FI-02044 VTT, Espoo, Finland.
| | - Anu Tamminen
- VTT Technical Research Centre of Finland, P.O. Box 1000, FI-02044 VTT, Espoo, Finland.
| | - Marilyn G Wiebe
- VTT Technical Research Centre of Finland, P.O. Box 1000, FI-02044 VTT, Espoo, Finland.
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