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Zhang M, Tong X, Wang W, Wang J, Qu W. Agarose biodegradation by deep-sea bacterium Vibrio natriegens WPAGA4 with the agarases through horizontal gene transfer. J Basic Microbiol 2024; 64:e2300521. [PMID: 37988660 DOI: 10.1002/jobm.202300521] [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: 09/10/2023] [Revised: 10/10/2023] [Accepted: 11/01/2023] [Indexed: 11/23/2023]
Abstract
This study aimed to reveal the importance of horizontal gene transfer (HGT) for the agarose-degrading ability and the related degradation pathway of a deep-sea bacterium Vibrio natriegens WPAGA4, which was rarely reported in former works. A total of four agarases belonged to the GH50 family, including Aga3418, Aga3419, Aga3420, and Aga3472, were annotated and expressed in Escherichia coli cells. The agarose degradation products of Aga3418, Aga3420, and Aga3472 were neoagarobiose, while those of Aga3419 were neoagarobiose and neoagarotetraose. The RT-qPCR analysis showed that the expression level ratio of Aga3418, Aga3419, Aga3420, and Aga3472 was stable at about 1:1:1.5:2.5 during the degradation, which indicated the optimal expression level ratio of the agarases for agarose degradation by V. natriegens WPAGA4. Based on the genomic information, three of four agarases and other agarose-degrading related genes were in a genome island with a G + C content that was obviously lower than that of the whole genome of V. natriegens WPAGA4, indicating that these agarose-degrading genes were required through HGT. Our results demonstrated that the expression level ratio instead of the expression level itself of agarase genes was crucial for agarose degradation by V. natriegens WPAGA4, and HGT occurred in the deep-sea environment, thereby promoting the deep-sea carbon cycle and providing a reference for studying the evolution and transfer pathways of agar-related genes.
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Affiliation(s)
- Mengyuan Zhang
- Marine Science and Technology College, Zhejiang Ocean University, Zhoushan, China
- Zhejiang Ocean University-University of Pisa Marine Graduate School, Zhoushan, China
| | - Xiufang Tong
- Marine Science and Technology College, Zhejiang Ocean University, Zhoushan, China
| | - Wenxin Wang
- Zhejiang Ocean University-University of Pisa Marine Graduate School, Zhoushan, China
| | - Jianxin Wang
- Marine Science and Technology College, Zhejiang Ocean University, Zhoushan, China
| | - Wu Qu
- Marine Science and Technology College, Zhejiang Ocean University, Zhoushan, China
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2
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Zhu La ALT, Li D, Cheng Z, Wen Q, Hu D, Jin X, Liu D, Feng Y, Guo Y, Cheng G, Hu Y. Enzymatically prepared neoagarooligosaccharides improve gut health and function through promoting the production of spermidine by Faecalibacterium in chickens. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169057. [PMID: 38056640 DOI: 10.1016/j.scitotenv.2023.169057] [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: 10/04/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 12/08/2023]
Abstract
Maintaining animal gut health through modulating the gut microbiota is a constant need when antibiotics are not used in animal feed during the food animal production process. Prebiotics is regarded as one of the most promising antibiotic alternatives for such purpose. As an attractive prebiotic, the role and mechanisms of neoagarooligosaccharides (NAOS) in promoting animal growth and gut health have not been elucidated. In this study, we first cloned and expressed marine bacterial β-agarase in yeast to optimize the NAOS preparation and then investigated the role and the underlying mechanisms of the prepared NAOS in improving chicken gut health and function. The marine bacterial β-agarase PDE13B was expressed in Pichia pastoris GS115 and generated even-numbered NAOS. Dietary the prepared NAOS promoted chicken growth and improved intestinal morphology, its barrier, and digestion capabilities, and absorption function. Metagenomic analysis indicated that NAOS modulated the chicken gut microbiota structure and function, and microbial interactions, and promoted the growth of spermidine-producing bacteria especially Faecalibacterium. Through integration of gut metagenome, gut content metabolome, and gut tissue transcriptome, we established connections among NAOS, gut microbes, spermidine, and chicken gut gene expression. The spermidine regulation of genes related to autophagy, immunity, and inflammation was further confirmed in chicken embryo intestinal epithelium cells. We also verified that NAOS can be utilized by Faecalibacterium prausnitzii to grow and produce spermidine in in vitro experiments. Collectively, we provide a systematic investigation of the role of NAOS in regulating gut health and demonstrate the microbial spermidine-mediated mechanism involved in prebiotic effects of NAOS, which lays foundation for future use of NAOS as a new antibiotic alternative in animal production.
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Affiliation(s)
- A La Teng Zhu La
- State Key Laboratory of Animal Nutrition and Feeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Depeng Li
- State Key Laboratory of Animal Nutrition and Feeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Zhiqian Cheng
- Huzhou Inspection & Quarantine Comprehensive Technology Center, Zhejiang 313000, China
| | - Qiu Wen
- State Key Laboratory of Animal Nutrition and Feeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Die Hu
- State Key Laboratory of Animal Nutrition and Feeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Xiaolu Jin
- State Key Laboratory of Animal Nutrition and Feeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Dan Liu
- State Key Laboratory of Animal Nutrition and Feeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Yuqing Feng
- State Key Laboratory of Animal Nutrition and Feeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Yuming Guo
- State Key Laboratory of Animal Nutrition and Feeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Gong Cheng
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Yongfei Hu
- State Key Laboratory of Animal Nutrition and Feeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
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Baek HI, Ha KC, Park YK, Lee JH, Kim EJ, Ko HJ, Joo JC. Anti-obesity effect of Neoagaro-oligosaccharides with overweight and obese subjects: a 16-week, randomized, double-blind, placebo-controlled clinical trial. BMC Complement Med Ther 2023; 23:368. [PMID: 37858097 PMCID: PMC10585797 DOI: 10.1186/s12906-023-04206-2] [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: 07/20/2023] [Accepted: 10/08/2023] [Indexed: 10/21/2023] Open
Abstract
BACKGROUND This trial aimed to evaluate the anti-obesity effects and safety of Neoagaro-oligosaccharides (NAOs) in humans in a 16 week, randomized, double-blind, placebo-controlled clinical trial. METHODS One hundred overweight or obese subjects with a body mass index of 23 to 34.9 kg/m2 and a percent body fat of > 25% for males or > 30% for females were enrolled. NAOs or placebo products were administered at 3 g (twice a day, four capsules once) each for 16 weeks. Efficacy and safety biomarkers were measured before and after intervention. RESULTS After 16 weeks of intervention, the group administered with NAOs had statistically significant decreases in visceral fat area and visceral-subcutaneous fat area ratio compared to the placebo group. The NAOs group suppressed the increase in weight and BMI compared to the placebo group, which was significant between groups. High-density lipoprotein- cholesterol was increased in the group administered with NAOs, which showed a significant trend compared to the placebo group. Clinical changes were not observed for any safety biomarkers. CONCLUSIONS These results suggest that NAOs have a beneficial effect on obesity. Thus, NAOs could be used as an anti-obesity supplement without side effects. TRIAL REGISTRATION cris.nih.go.kr: (KCT0006640, 07/10/2021).
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Affiliation(s)
- Hyang-Im Baek
- Department of Food Science & Nutrition, Woosuk University, Wanju, 55338, Republic of Korea
- Healthcare Claims & Management Inc, Jeonju, 54858, Republic of Korea
| | - Ki-Chan Ha
- Healthcare Claims & Management Inc, Jeonju, 54858, Republic of Korea
| | - Yu Kyung Park
- Healthcare Claims & Management Inc, Jeonju, 54858, Republic of Korea
| | | | - Eun Joo Kim
- Dyne Bio Inc, Sungnam, 13209, Republic of Korea
| | | | - Jong Cheon Joo
- Department of Sasang Constitutional Medicine, College of Korean Medicine, Wonkwang University, Iksan, 54538, Republic of Korea.
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Dai X, Zhang Q, Zhang G, Ma C, Zhang R. Protective effect of agar oligosaccharide on male Drosophila melanogaster suffering from oxidative stress via intestinal microflora activating the Keap1-Nrf2 signaling pathway. Carbohydr Polym 2023; 313:120878. [PMID: 37182968 DOI: 10.1016/j.carbpol.2023.120878] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 03/21/2023] [Accepted: 03/29/2023] [Indexed: 04/08/2023]
Abstract
Agar oligosaccharide (AOS) is a new kind of marine functional oligosaccharide with generous biological activities. To investigate the antioxidative effects of AOS in vivo, 3 % aqueous hydrogen peroxide (H2O2) was used to induce oxidative stress in male Drosophila melanogaster (D. melanogaster) fed 5 % sucrose (SUC). AOS (0.125 %) in the medium extended the lifespan of D. melanogaster suffering from oxidative stress by improving antioxidant capacity and intestinal function. Electron microscopic observation of epithelial cells showed that AOS alleviated the damage caused by H2O2 challenge in the intestine of D. melanogaster, including a reduction of gut leakage and maintenance of intestinal length and cell ultrastructure. The Keap1-Nrf2 (analogues of CncC gene in D. melanogaster) signaling pathway was significantly activated based on gene expression levels and a reduction in ROS content in the intestine of D. melanogaster suffering from oxidative stress. The improvement of antioxidant capacity may be related to the regulation of intestinal microflora with AOS supplementation for D. melanogaster. Nrf2-RNAi, sterile and gnotobiotic D. melanogaster were used to validate the hypothesis that AOS activated the Keap1-Nrf2 signaling pathway to achieve antioxidant effects by regulating intestinal microflora. The above results contribute to our understanding of the antioxidative mechanism of AOS and promote its application in the food industry.
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Neoagaro-Oligosaccharides Ameliorate Chronic Restraint Stress-Induced Depression by Increasing 5-HT and BDNF in the Brain and Remodeling the Gut Microbiota of Mice. Mar Drugs 2022; 20:md20110725. [PMID: 36422003 PMCID: PMC9693468 DOI: 10.3390/md20110725] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/16/2022] [Accepted: 11/16/2022] [Indexed: 11/22/2022] Open
Abstract
Neoagaro-oligosaccharides (NAOs) belong to the algae oligosaccharides. NAOs have been found to have diverse biological activities. However, the effects of NAOs on depression and their underlying mechanism have not been thoroughly studied. A chronic restraint stress (CRS)-induced C57BL/6J mouse model was used to assess the antidepressant effects of NAOs. Anxiety and depression behaviors were assessed by open field tests (OFT) and forced swimming tests (FST), while interleukin 18 (IL-18), 5-hydroxytryptamine (5-HT) and brain-derived neurotrophic factor (BDNF) were the molecular biomarkers of depression. Fecal microbiota transplantation (FMT) was performed. The results showed that NAO treatment significantly improved the body weight of depressed mice and reduced the central area time in the OFT and immobility time in the FST. NAO treatment decreased the levels of IL-18 in the serum and increased the levels of 5-HT in the serum and whole brain and of BDNF in the whole brain. NAO treatment mitigated the gut microbiota dysbiosis in the depressed mice and reversed the decreased levels of short-chain fatty acids (SCFAs) in the cecum of the depressed mice. FMT indicated that the gut microbiota is, indeed, linked to depression, which was reflected in the changes in weight gain and behaviors. In a word, NAOs effectively reversed the CRS-induced mice model of depression, which depended on the changes in the gut microbiota and SCFAs, as well as its modulation of 5-HT and BDNF.
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Cheong KL, Li JK, Zhong S. Preparation and Structure Characterization of High-Value Laminaria digitata Oligosaccharides. Front Nutr 2022; 9:945804. [PMID: 35873409 PMCID: PMC9301192 DOI: 10.3389/fnut.2022.945804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 06/06/2022] [Indexed: 12/19/2022] Open
Abstract
Algae-derived marine oligosaccharides have been reported to be promising bioactive compounds because of their various properties with health benefits and potential significance in numerous applications in industrial biotechnology. In this study, laminaran oligosaccharides (LOs) with varying degrees of polymerization were obtained through partial acid hydrolysis of laminaran derived from Laminaria digitata. Based on response surface methodology, the optimum LOs yield was obtained for acid hydrolysis laminaran at a hydrolysis time of 55 min, temperature of 71°C, and acid concentration of 1.00 mol/L. The size-exclusion resin Bio-Gel P-2 was considered to be a better option for LOs purification. The structure of the purified oligosaccharides was analyzed through mass spectrometry and nuclear magnetic resonance. They demonstrated the main oligosaccharide structure corresponding to the connection of glucose with β-D-Glcp-(1→3)-β-D-Glcp, which was identified as laminaribiose (DP2), laminaritriose (DP3), laminaritetrose (DP4), and laminaripentaose (DP5). LOs demonstrate excellent antioxidant activities, as evidenced from their reactions with oxidizing free radicals, 1, 1-diphenyl-2-picryl-hydrazyl, and 2, 2′-azino-bis (3-etilbenzotiazoline-6-sulfonic acid) radicals. LOs exhibited a prebiotic effect on the growth of Bifidobacterium adolescentis and Lactobacillus plantarum. Therefore, we propose the development of LOs as natural antioxidants and prebiotics in the functional food and pharmaceutical industries.
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Affiliation(s)
- Kit-Leong Cheong
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, College of Food Science and Technology, Guangdong Ocean University, Zhanjiang, China
- Department of Biology, College of Science, Shantou University, Shantou, China
| | - Jia-Kang Li
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, College of Food Science and Technology, Guangdong Ocean University, Zhanjiang, China
- Department of Biology, College of Science, Shantou University, Shantou, China
| | - Saiyi Zhong
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, College of Food Science and Technology, Guangdong Ocean University, Zhanjiang, China
- *Correspondence: Saiyi Zhong,
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Nakamura-Gouvea N, Alves-Lima C, Benites LF, Iha C, Maracaja-Coutinho V, Aliaga-Tobar V, Araujo Amaral Carneiro M, Yokoya NS, Marinho-Soriano E, Graminha MAS, Collén J, Oliveira MC, Setubal JC, Colepicolo P. Insights into agar and secondary metabolite pathways from the genome of the red alga Gracilaria domingensis (Rhodophyta, Gracilariales). JOURNAL OF PHYCOLOGY 2022; 58:406-423. [PMID: 35090189 DOI: 10.1111/jpy.13238] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 11/24/2021] [Indexed: 06/14/2023]
Abstract
Gracilariales is a clade of florideophycean red macroalgae known for being the main source of agar. We present a de novo genome assembly and annotation of Gracilaria domingensis, an agarophyte alga with flattened thallus widely distributed along Central and South American Atlantic intertidal zones. In addition to structural analysis, an organizational comparison was done with other Rhodophyta genomes. The nuclear genome has 78 Mbp, with 11,437 predicted coding genes, 4,075 of which did not have hits in sequence databases. We also predicted 1,567 noncoding RNAs, distributed in 14 classes. The plastid and mitochondrion genome structures were also obtained. Genes related to agar synthesis were identified. Genes for type II galactose sulfurylases could not be found. Genes related to ascorbate synthesis were found. These results suggest an intricate connection of cell wall polysaccharide synthesis and the redox systems through the use of L-galactose in Rhodophyta. The genome of G. domingensis should be valuable to phycological and aquacultural research, as it is the first tropical and Western Atlantic red macroalgal genome to be sequenced.
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Affiliation(s)
- Natalia Nakamura-Gouvea
- Laboratory of Algal Biochemistry and Molecular Biology, Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu, Prestes, 748, São Paulo, SP, 05508-000, Brazil
| | - Cicero Alves-Lima
- Laboratory of Algal Biochemistry and Molecular Biology, Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu, Prestes, 748, São Paulo, SP, 05508-000, Brazil
| | - Luiz Felipe Benites
- CNRS, UMR 7232 Biologie Intégrative des Organismes Marins (BIOM), Sorbonne Université, Observatoire Océanologique - F-66650, Banyuls-sur-Mer, France
| | - Cintia Iha
- Department of Botany, Institute of Biosciences, University of São Paulo, R Matão 277, São Paulo, SP, 05508-090, Brazil
| | - Vinicius Maracaja-Coutinho
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Universidad de Chile - Independencia, Santiago, 8380492, Chile
| | - Victor Aliaga-Tobar
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Universidad de Chile - Independencia, Santiago, 8380492, Chile
| | - Marcella Araujo Amaral Carneiro
- Department of Oceanography and Limnology, Federal University of Rio Grande do Norte - Via Costeira, Praia de Mãe Luiza, s/n, Natal, RN, 59014-002, Brazil
| | - Nair S Yokoya
- Phycology Research Center, Institute of Botany, Secretary of Infrastructure and Environment of São Paulo State, Brazil - Av. Miguel Estefano, 3687, Água Funda, São Paulo, SP, 04301-012, Brazil
| | - Eliane Marinho-Soriano
- Department of Oceanography and Limnology, Federal University of Rio Grande do Norte - Via Costeira, Praia de Mãe Luiza, s/n, Natal, RN, 59014-002, Brazil
| | - Marcia A S Graminha
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Rod. Araraquara-Jaú km 1, Campus Ville, Araraquara, SP, 14800-903, Brazil
| | - Jonas Collén
- Station Biologique de Roscoff, UMR 8227, Integrative Biology of Marine Models - CS 90074, Roscoff cedex, 29688, France
| | - Mariana C Oliveira
- Department of Botany, Institute of Biosciences, University of São Paulo, R Matão 277, São Paulo, SP, 05508-090, Brazil
| | - Joao C Setubal
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP, 05508-000, Brazil
| | - Pio Colepicolo
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP, 05508-000, Brazil
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8
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Biochemical Characterization and Cold-Adaption Mechanism of A PL-17 Family Alginate Lyase Aly23 from Marine Bacterium Pseudoalteromonas sp. ASY5 and Its Application for Oligosaccharides Production. Mar Drugs 2022; 20:md20020126. [PMID: 35200655 PMCID: PMC8876620 DOI: 10.3390/md20020126] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 02/02/2022] [Accepted: 02/04/2022] [Indexed: 02/01/2023] Open
Abstract
As an important enzyme involved in the marine carbon cycle, alginate lyase has received extensive attention because of its excellent degradation ability on brown algae, which is widely utilized for alginate oligosaccharide preparation or bioethanol production. In comparison with endo-type alginate lyases (PL-5, PL-7, and PL-18 families), limited studies have focused on PL-17 family alginate lyases, especially for those with special characteristics. In this study, a novel PL-17 family alginate lyase, Aly23, was identified and cloned from the marine bacterium Pseudoalteromonas carrageenovora ASY5. Aly23 exhibited maximum activity at 35 °C and retained 48.93% of its highest activity at 4 °C, representing an excellent cold-adaptation property. Comparative molecular dynamics analysis was implemented to explore the structural basis for the cold-adaptation property of Aly23. Aly23 had a high substrate preference for poly β-D-mannuronate and exhibited both endolytic and exolytic activities; its hydrolysis reaction mainly produced monosaccharides, disaccharides, and trisaccharides. Furthermore, the enzymatic hydrolyzed oligosaccharides displayed good antioxidant activities to reduce ferric and scavenge radicals, such as hydroxyl, ABTS+, and DPPH. Our work demonstrated that Aly23 is a promising cold-adapted biocatalyst for the preparation of natural antioxidants from brown algae.
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Chen X, Li H, Qiao X, Jiang T, Fu X, He Y, Zhao X. Agarose oligosaccharide- silver nanoparticle- antimicrobial peptide- composite for wound dressing. Carbohydr Polym 2021; 269:118258. [PMID: 34294293 DOI: 10.1016/j.carbpol.2021.118258] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/09/2021] [Accepted: 05/20/2021] [Indexed: 12/12/2022]
Abstract
Marine polysaccharides or oligosaccharides have potential to promote wound healing due to their biocompatibility and physicochemical properties. However, microbial infection delays wound healing process, and novel antimicrobial wound dressings are urgently needed. Here, agarose oligosaccharides (AGO) obtained from marine red algae were used as a reducing and stabilizer for green synthesis of silver nanoparticles (AgNPs), and further successfully connected with odorranain A (OA), one of antimicrobial peptides (AMPs), to obtain a novel composite nanomaterial (AGO-AgNPs-OA). Transmission electron microscopy (TEM) and Malvern particle size analyzer showed that AGO-AgNPs-OA was spherical or elliptic with average size of about 100 nm. Circular dichroism (CD) spectroscopy showed that AGO-AgNPs stabilized the α-helical structure of OA. AGO-AgNPs-OA showed stronger anti-bacterial activities than AGO-AgNPs, and had good biocompatibility and significant promoting effect on wound healing. Our data suggest that AMPs conjugated marine oligosaccharides and AgNPs may be effective and safe antibacterial materials for wound therapy.
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Affiliation(s)
- Xiangyan Chen
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Shandong Provincial Key laboratory of Glycoscience and Glycoengineering, Qingdao 266003, China; Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Hongjin Li
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Shandong Provincial Key laboratory of Glycoscience and Glycoengineering, Qingdao 266003, China; Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Xiaoni Qiao
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Shandong Provincial Key laboratory of Glycoscience and Glycoengineering, Qingdao 266003, China
| | - Tianze Jiang
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Shandong Provincial Key laboratory of Glycoscience and Glycoengineering, Qingdao 266003, China; Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Xue Fu
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Shandong Provincial Key laboratory of Glycoscience and Glycoengineering, Qingdao 266003, China
| | - Yue He
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Shandong Provincial Key laboratory of Glycoscience and Glycoengineering, Qingdao 266003, China
| | - Xia Zhao
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Shandong Provincial Key laboratory of Glycoscience and Glycoengineering, Qingdao 266003, China; Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
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Copper Immobilization on Fe3O4@Agar: An Efficient Superparamagnetic Nanocatalyst for Green Ullmann-Type Cross-Coupling Reaction of Primary and Secondary Amines with Aryl Iodide Derivatives. J Inorg Organomet Polym Mater 2021. [DOI: 10.1007/s10904-021-02106-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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11
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Xie XT, Zheng LX, Duan HM, Liu Y, Chen XQ, Cheong KL. Structural characteristics of Gracilaria lemaneiformis oligosaccharides and their alleviation of dextran sulphate sodium-induced colitis by modulating the gut microbiota and intestinal metabolites in mice. Food Funct 2021; 12:8635-8646. [PMID: 34346464 DOI: 10.1039/d1fo01201k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Ulcerative colitis (UC) is a chronic lifetime disorder with a high incidence worldwide. A functional food-based method to prevent UC would be a good option for disease control. G. lemaneiformis oligosaccharides (GLOs) should have potent benefits for the gastrointestinal tract, based on in vitro fermentation assessed in our previous study. This study evaluated the therapeutic potential of GLOs in UC, as well as their possible mechanisms of action. The administration of GLOs was able to reduce the severity of dextran sulphate sodium-induced colitis by protecting mice from weight loss, reductions in colon length, inflammatory infiltration, and colon damage. Gut microbiota composition analysis showed that at the phylum level, GLOs could restore the composition of Bacteroidetes and decrease the level of Firmicutes. Consistently, it increased the contents of beneficial microbial metabolites and short-chain fatty acids in the mouse colitis model. In conclusion, GLOs could comprise a promising functional food strategy to alleviate UC symptoms.
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Affiliation(s)
- Xu-Ting Xie
- Guangdong Provincial Key Laboratory of Marine Biotechnology, Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong, China.
| | - Li-Xin Zheng
- Guangdong Provincial Key Laboratory of Marine Biotechnology, Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong, China.
| | - Hui-Min Duan
- Guangdong Provincial Key Laboratory of Marine Biotechnology, Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong, China.
| | - Yang Liu
- Guangdong Provincial Key Laboratory of Marine Biotechnology, Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong, China.
| | - Xian-Qiang Chen
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, Guangxi, China.
| | - Kit-Leong Cheong
- Guangdong Provincial Key Laboratory of Marine Biotechnology, Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong, China.
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Jiang C, Cheng D, Liu Z, Sun J, Mao X. Advances in agaro-oligosaccharides preparation and bioactivities for revealing the structure-function relationship. Food Res Int 2021; 145:110408. [PMID: 34112411 DOI: 10.1016/j.foodres.2021.110408] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 04/13/2021] [Accepted: 05/06/2021] [Indexed: 11/24/2022]
Abstract
Agaro-oligosaccharides originating from red algae have attracted increasing attention in both basic theoretical research and applied fields due to their excellent bioactivities, which indicates the wide prospects of agaro-oligosaccharides for application in the food, pharmaceutical and cosmetic industries. Thus, a considerable number of studies regarding functional agaro-oligosaccharides preparation as well as the bioactivities exploration have been carried out. Based on these studies, this review first introduced different methods that have been used in agar extraction from red algae, and further provided research progress on arylsulfatase. Then, different methods used for agaro-oligosaccharides production were summarized. Moreover, the abundant bioactivities of agaro-oligosaccharides were described in detail. Finally, this review has discussed current research problems and further provided critical aspects, which may be helpful for revealing the structure-function relationship of agaro-oligosaccharide.
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Affiliation(s)
- Chengcheng Jiang
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Danyang Cheng
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Zhen Liu
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Jianan Sun
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
| | - Xiangzhao Mao
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China; Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
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13
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Chen X, Fu X, Huang L, Xu J, Gao X. Agar oligosaccharides: A review of preparation, structures, bioactivities and application. Carbohydr Polym 2021; 265:118076. [PMID: 33966840 DOI: 10.1016/j.carbpol.2021.118076] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 03/28/2021] [Accepted: 04/10/2021] [Indexed: 12/14/2022]
Abstract
Agar, a gelatinous polysaccharide which is in the cell wall of many red algae, is widely used as food and gelling agent. Agar oligosaccharides (AOs), the hydrolysate of agar, show much more kinds of bio-activities because of its lower molecular weight, better water solubility and higher absorption efficiency. It is indicated that AOs with different structure and degree of polymerization, i.e. series of agaro-oligosaccharides and neoagaro-oligosaccharides, can be obtained under different preparation conditions. In addition, the biological activities of AOs are diversely and closely correlated to the composition and structure. This review aims to comprehensively summarize the preparation, structural characteristics and bio-activities of AOs, so as to provide a reference for applications of AOs as marine natural products in pharmacological, cosmetics and nutraceutical fields.
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Affiliation(s)
- Xiaodan Chen
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
| | - Xiaoting Fu
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China.
| | - Luqiang Huang
- Key Laboratory of Special Marine Bio-resources Sustainable Utilization of Fujian Province, College of Life Science, Fujian Normal University, Fuzhou, 350108, China
| | - Jiachao Xu
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
| | - Xin Gao
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
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14
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Chen D, Zhou W, Yang J, Ao J, Huang Y, Shen D, Jiang Y, Huang Z, Shen H. Effects of Seaweed Extracts on the Growth, Physiological Activity, Cane Yield and Sucrose Content of Sugarcane in China. FRONTIERS IN PLANT SCIENCE 2021; 12:659130. [PMID: 34122479 PMCID: PMC8189154 DOI: 10.3389/fpls.2021.659130] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 04/19/2021] [Indexed: 05/14/2023]
Abstract
Seaweed extracts (SEs) have been widely used as biostimulants in crop management due to their growth-promoting and stress-resistant effects. To date, there are few reports of the effect of SEs on sucrose content and cane yield. Here, we conducted field experiments for three consecutive growth seasons (2017∼2019) in two areas (Suixi and Wengyuan) of China, to investigate the yield and sugar content of sugarcane in response to SE treatment at different growth stages. The results showed that spraying SEs once at seedling (S), early elongation (E), and early mature (M) stages, respectively, once at S and E stages, respectively, or once at the S stage increased the cane yield by 9.23, 9.01, and 3.33%, respectively, implying that SEs application at the early elongation stage played a vital role in promoting sugarcane growth. Photosynthetic parameters and nutrient efficiency analysis showed that spraying SEs at S and E stages enhanced the net photosynthetic rate, transpiration rate, and water use efficiency, and increased N, P, or K utilization efficiency, compared with those of the control. Notably, cane yield increasing rate of SEs in 2017 and 2018 were higher than those in 2019 in Wengyuan but lower than those in 2019 in Suixi. Interestingly, the total rainfall and monthly average rainfall in 2017 and 2018 were lower than those in 2019 in Wengyuan but higher than those in 2019 in Suixi. The results suggested that the yield increasing rate of SEs on sugarcane was better in less rainfall years. The sucrose content of sugarcane showed no difference between spraying SEs at the M stage alone or at the three growth stages but was higher than those of SE treatments at S and/or E stages. Enzyme activity analysis showed that spraying SEs at the M stage increased the activity of sucrose phosphate synthase activity by 9.14% in leaves and 15.16% in stems, and decreased soluble acid invertase activity in stems by 16.52%, which contributed to the sucrose increase of 5.00%. The above results suggested that SEs could increase cane yield and promote sucrose accumulation in sugarcane. The yield increasing effect was more obvious under conditions of drought stress.
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Affiliation(s)
- Diwen Chen
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, Guangzhou, China
- Institute of Bioengineering, Guangdong Academy of Sciences, Guangzhou, China
| | - Wenling Zhou
- Institute of Bioengineering, Guangdong Academy of Sciences, Guangzhou, China
| | - Jin Yang
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, Guangzhou, China
| | - Junhua Ao
- Institute of Bioengineering, Guangdong Academy of Sciences, Guangzhou, China
| | - Ying Huang
- Institute of Bioengineering, Guangdong Academy of Sciences, Guangzhou, China
| | - Dachun Shen
- Institute of Bioengineering, Guangdong Academy of Sciences, Guangzhou, China
| | - Yong Jiang
- Institute of Bioengineering, Guangdong Academy of Sciences, Guangzhou, China
| | - Zhenrui Huang
- Crops Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, China
- Guangdong Provincial Key Laboratory of Crop Genetics and Improvement, Guangzhou, China
- *Correspondence: Zhenrui Huang,
| | - Hong Shen
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, Guangzhou, China
- Hong Shen,
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15
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Vieira TF, Corrêa RCG, Peralta RA, Peralta-Muniz-Moreira RF, Bracht A, Peralta RM. An Overview of Structural Aspects and Health Beneficial Effects of Antioxidant Oligosaccharides. Curr Pharm Des 2020; 26:1759-1777. [PMID: 32039673 DOI: 10.2174/1381612824666180517120642] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 12/03/2019] [Indexed: 01/09/2023]
Abstract
BACKGROUND Non-digestible oligosaccharides are versatile sources of chemical diversity, well known for their prebiotic actions, found naturally in plants or produced by chemical or enzymatic synthesis or by hydrolysis of polysaccharides. Compared to polyphenols or even polysaccharides, the antioxidant potential of oligosaccharides is still unexplored. The aim of the present work was to provide an up-to-date, broad and critical contribution on the topic of antioxidant oligosaccharides. METHODS The search was performed by crossing the words oligosaccharides and antioxidant. Whenever possible, attempts at establishing correlations between chemical structure and antioxidant activity were undertaken. RESULTS The most representative in vitro and in vivo studies were compiled in two tables. Chitooligosaccharides and xylooligosaccharides and their derivatives were the most studied up to now. The antioxidant activities of oligosaccharides depend on the degree of polymerization and the method used for depolymerization. Other factors influencing the antioxidant strength are solubility, monosaccharide composition, the type of glycosidic linkages of the side chains, molecular weight, reducing sugar content, the presence of phenolic groups such as ferulic acid, and the presence of uronic acid, among others. Modification of the antioxidant capacity of oligosaccharides has been achieved by adding diverse organic groups to their structures, thus increasing also the spectrum of potentially useful molecules. CONCLUSION A great amount of high-quality evidence has been accumulating during the last decade in support of a meaningful antioxidant activity of oligosaccharides and derivatives. Ingestion of antioxidant oligosaccharides can be visualized as beneficial to human and animal health.
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Affiliation(s)
- Tatiane F Vieira
- Program Post-graduated of Food Science, Universidade Estadual de Maringa, Maringa, PR, Brazil
| | - Rúbia C G Corrêa
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal.,Program of Master in Science, Technology and Food Safety, Cesumar Institute of Science, Technology and Innovation (ICETI), Centro Universitário de Maringá, Maringá, Paraná, Brazil
| | - Rosely A Peralta
- Department of Chemistry, Universidade Federal de Santa Catarina, SC, Brazil
| | | | - Adelar Bracht
- Program Post-graduated of Food Science, Universidade Estadual de Maringa, Maringa, PR, Brazil.,Department of Biochemistry, Universidade Estadual de Maringá, Maringá, PR, Brazil
| | - Rosane M Peralta
- Program Post-graduated of Food Science, Universidade Estadual de Maringa, Maringa, PR, Brazil.,Department of Biochemistry, Universidade Estadual de Maringá, Maringá, PR, Brazil
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16
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Xu ZX, Yu P, Liang QY, Mu DS, Du ZJ. Inducible expression of agar-degrading genes in a marine bacterium Catenovulum maritimus Q1T and characterization of a β-agarase. Appl Microbiol Biotechnol 2020; 104:10541-10553. [DOI: 10.1007/s00253-020-10969-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/09/2020] [Accepted: 10/18/2020] [Indexed: 12/01/2022]
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17
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Minzer S, Estruch R, Casas R. Wine Intake in the Framework of a Mediterranean Diet and Chronic Non-Communicable Diseases: A Short Literature Review of the Last 5 Years. Molecules 2020; 25:E5045. [PMID: 33143082 PMCID: PMC7663679 DOI: 10.3390/molecules25215045] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 10/27/2020] [Accepted: 10/28/2020] [Indexed: 12/12/2022] Open
Abstract
Dietary habits are a determining factor of the higher incidence and prevalence of chronic non-communicable diseases (NCDs). In the aim to find a possible preventive and intervention strategy, the Mediterranean diet (MedDiet) has been proposed as an effective approach. Within the MedDiet, moderate wine consumption with meals is a positive item in the MedDiet score; however, recent studies have reported a dose-response association between alcohol consumption and higher risk of a large number of NCDs. This review aimed to evaluate the association between NCDs and wine consumption in the framework of the MedDiet, with a simple review of 22 studies of the highest-level literature published over the last five years. We found that the information regarding the effects of wine in different health outcomes has not varied widely over the past five years, finding inconclusive results among the studies evaluated. Most of the literature agrees that light to moderate wine intake seems to have beneficial effects to some extent in NCDs, such as hypertension, cancer, dyslipidemia and dementia, but no definitive recommendations can be made on a specific dose intake that can benefit most diseases.
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Affiliation(s)
- Simona Minzer
- El Pino Hospital, Avenida Padre Hurtado, San Bernardo, 13560 Santiago de Chile, Chile;
| | - Ramon Estruch
- Department of Internal Medicine, Hospital Clinic, Institut d’Investigació Biomèdica August Pi i Sunyer (IDIBAPS), University of Barcelona, Villarroel, 170, 08036 Barcelona, Spain;
- Center for Biomedical Research Network (CIBER) 06/03, Fisiopatología de la Obesidad y la Nutrición, Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Rosa Casas
- Department of Internal Medicine, Hospital Clinic, Institut d’Investigació Biomèdica August Pi i Sunyer (IDIBAPS), University of Barcelona, Villarroel, 170, 08036 Barcelona, Spain;
- Center for Biomedical Research Network (CIBER) 06/03, Fisiopatología de la Obesidad y la Nutrición, Instituto de Salud Carlos III, 28029 Madrid, Spain
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18
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Liu Z, Sun X. A Critical Review of the Abilities, Determinants, and Possible Molecular Mechanisms of Seaweed Polysaccharides Antioxidants. Int J Mol Sci 2020; 21:E7774. [PMID: 33096625 PMCID: PMC7589308 DOI: 10.3390/ijms21207774] [Citation(s) in RCA: 12] [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: 09/21/2020] [Revised: 10/12/2020] [Accepted: 10/16/2020] [Indexed: 12/12/2022] Open
Abstract
Oxidative stress induces various cardiovascular, neurodegenerative, and cancer diseases, caused by excess reactive oxygen species (ROS). It is attributed to the lack of sufficient antioxidant defense capacity to eliminate unnecessary ROS. Seaweeds are largely cultivated for their edible and commercial purposes. Excessive proliferation of some seaweeds has occurred in coastal areas, causing environmental and economic disasters, and even threating human health. Removing and disposing of the excess seaweeds are costly and labor-intensive with few rewards. Therefore, improving the value of seaweeds utilizes this resource, but also deals with the accumulated biomass in the environment. Seaweed has been demonstrated to be a great source of polysaccharides antioxidants, which are effective in enhancing the antioxidant system in humans and animals. They have been reported to be a healthful method to prevent and/or reduce oxidative damage. Current studies indicate that they have a good potential for treating various diseases. Polysaccharides, the main components in seaweeds, are commonly used as industrial feedstock. They are readily extracted by aqueous and acetone solutions. This study attempts to review the current researches related to seaweed polysaccharides as an antioxidant. We discuss the main categories, their antioxidant abilities, their determinants, and their possible molecular mechanisms of action. This review proposes possible high-value ways to utilize seaweed resources.
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Affiliation(s)
- Zhiwei Liu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China;
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou 511458, China
| | - Xian Sun
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou 511458, China
- Zhuhai Key Laboratory of Marine Bioresources and Environment, School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510275, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519080, China
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19
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Apolinar-Valiente R, Williams P, Doco T. Recent advances in the knowledge of wine oligosaccharides. Food Chem 2020; 342:128330. [PMID: 33067045 DOI: 10.1016/j.foodchem.2020.128330] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 10/05/2020] [Accepted: 10/05/2020] [Indexed: 12/01/2022]
Abstract
Oligosaccharides are carbohydrates with a low polymerization degree containing between three and fifteen monosaccharide residues covalently linked through glycosidic bonds. Oligosaccharides are related to plant defense responses and possess beneficial attributes for human health. Research has focused in wine oligosaccharides only in the last decade. In this paper, a summary of these works is provided. They include: (i) wine oligosaccharides origins, (ii) techniques for isolating oligosaccharide fraction and determining their content, composition and structure, (iii) their dependence on the grape origin and cultivar and winemaking process, and (iv) the connection between oligosaccharides and wine sensorial attributes. Further research is required regarding the impact of agricultural aspects and winemaking techniques on wine oligosaccharides. The knowledge concerning their influence on sensorial and physicochemical properties of wines and on human health should also be improved. The implementation of laboratory methods will provide better understanding of these compounds and their performance within wine's matrix.
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Affiliation(s)
- Rafael Apolinar-Valiente
- INRAE, Supagro, UM, Joint Research Unit 1083, Sciences for Enology, Biomolecules of Interest in Oenology (B.I.O.) Research Team, 2 Place Pierre Viala, F-34060 Montpellier, France.
| | - Pascale Williams
- INRAE, Supagro, UM, Joint Research Unit 1083, Sciences for Enology, Biomolecules of Interest in Oenology (B.I.O.) Research Team, 2 Place Pierre Viala, F-34060 Montpellier, France.
| | - Thierry Doco
- INRAE, Supagro, UM, Joint Research Unit 1083, Sciences for Enology, Biomolecules of Interest in Oenology (B.I.O.) Research Team, 2 Place Pierre Viala, F-34060 Montpellier, France.
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20
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Li C, Li C, Li L, Yang X, Chen S, Qi B, Zhao Y. Comparative Genomic and Secretomic Analysis Provide Insights Into Unique Agar Degradation Function of Marine Bacterium Vibrio fluvialis A8 Through Horizontal Gene Transfer. Front Microbiol 2020; 11:1934. [PMID: 32849481 PMCID: PMC7432431 DOI: 10.3389/fmicb.2020.01934] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 07/22/2020] [Indexed: 12/27/2022] Open
Abstract
Agarose-oligosaccharide production from agar degradation by agarase exhibits lots of advantages and good application prospects. In this study, a novel agar-degrading bacterium Vibrio sp. A8 was isolated from a red algae in the South China Sea. The whole genome sequencing with comparative genomic and secretomic analysis were used to better understand its genetic components about agar degradation. This strain exhibited good agarase production in artificial seawater after culture optimization. The complete genome (4.88 Mb) of this strain comprised two circular chromosomes (3.19 and 1.69 Mb) containing 4,572 protein-coding genes, 108 tRNA genes and 31 rRNA genes. This strain was identified as Vibrio fluvialis A8 by comparative genomic analysis based on genome phylogenetic tree and average nucleotide identity (ANI) similarity. Different from other 20 similar strains including three strains of the same species, V. fluvialis A8 possessed unique agar degradation ability with four β-agarases (GH50) and one α-1,3-L-NA2 hydrolase (GH117) due to the horizontal gene transfer. Secretomic analysis showed that only β-agarase (gene 3152) was abundantly expressed in the secretome of V. fluvialis A8. This agarase had a good substrate specificity and wide work conditions in complex environments, suggesting its potential application for agarose-oligosaccharide production.
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Affiliation(s)
- Chunsheng Li
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, National R&D Center for Aquatic Product Processing, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China.,Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Chi Li
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, National R&D Center for Aquatic Product Processing, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - Laihao Li
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, National R&D Center for Aquatic Product Processing, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China.,Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Xianqing Yang
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, National R&D Center for Aquatic Product Processing, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China.,Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Shengjun Chen
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, National R&D Center for Aquatic Product Processing, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China.,Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Bo Qi
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, National R&D Center for Aquatic Product Processing, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China.,Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Yongqiang Zhao
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, National R&D Center for Aquatic Product Processing, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China.,Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
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21
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The Effectively Simultaneous Production of Cello-oligosaccharide and Glucose Mono-decanoate from Lignocellulose by Enzymatic Esterification. Appl Biochem Biotechnol 2020; 192:600-615. [PMID: 32500429 DOI: 10.1007/s12010-020-03356-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 05/22/2020] [Indexed: 10/24/2022]
Abstract
Cello-oligosaccharide has drawn an increasing attention as the nutritional ingredients of dietary supplements, whose quality is affected by the concentration of monosaccharide. In the present study, an effective process was developed for the simultaneous production of cello-oligosaccharide and glucose mono-decanoate from lignocellulose by enzymatic esterification. During the process, the excessive glucose in cello-oligosaccharide was converted into glucose mono-decanoate, which is a well-known biodegradable nonionic surfactant. The filter paper was initially used as the model to investigate the feasibility of the process, in which the purity of resultant cello-oligosaccharide was increased from 33.3% to 74.3%, simultaneously producing glucose mono-decanoate with a purity of 92.3%. Further verification of 3 kinds of lignocelluloses (switchgrass, cornstalk, and reed) also indicated a good performance of the process. The present process provided an effective strategy to increase the purity of resultant cello-oligosaccharide with the simultaneous production of high value-added products of sugar monoester. Graphical Abstract Simultaneous production of cello-oligosaccharide and glucose mono-decanoate from lignocellulose.
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22
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A Novel Route for Agarooligosaccharide Production with the Neoagarooligosaccharide-Producing β-Agarase as Catalyst. Catalysts 2020. [DOI: 10.3390/catal10020214] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Enzymes are catalysts with high specificity. Different compounds could be produced by different enzymes. In case of agaro-oligosaccharides, agarooligosaccharide (AOS) can be produced by α-agarase through cleaving the α-1,3-glycosidic linkages of agarose, while neoagarooligosaccharide (NAOS) can be produced by β-agarase through cleaving the β-1,4-glycosidic linkages of agarose. However, in this study, we showed that β-agarase could also be used to produce AOSs with high purity and yield. The feasibility of our route was confirmed by agarotriose (A3) and agaropentaose (A5) formation from agaroheptaose (A7) and agarononoses (A9) catalyzed by β-agarase. Agarose was firstly liquesced by citric acid into a mixture of AOSs. The AOSs mixture was further catalyzed by β-agarase. When using the neoagarotetraose-forming β-agarase AgWH50B, agarotriose could be produced with the yield of 48%. When using neoagarotetraose, neoagarohexaose-forming β-agarase DagA, both agarotriose and agaropentaose could be produced with the yield of 14% and 13%, respectively. Our method can be used to produce other value-added agaro-oligosaccharides from agarose by different agarolytic enzymes.
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23
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Jana UK, Kango N. Characteristics and bioactive properties of mannooligosaccharides derived from agro-waste mannans. Int J Biol Macromol 2020; 149:931-940. [PMID: 32014482 DOI: 10.1016/j.ijbiomac.2020.01.304] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Revised: 01/28/2020] [Accepted: 01/31/2020] [Indexed: 12/14/2022]
Abstract
Mannooligosaccharides (MOS) were derived using Aspergillus oryzae β-mannanase (ManAo) from different mannan-rich agro-wastes, palm kernel cake (PKC), guar gum and copra meal (CM). Guar gum (GG) released higher amount of MOS (56.31% w/w) from which purification of mannobiose (0.68 mg) and mannotriose (1.26 mg) was demonstrated using size-exclusion chromatography. FTIR analysis of mannan hydrolysates showed characteristic peaks in 1200-900 cm-1 region indicating the presence of MOS. 1H &13C NMR spectra showed presence of anomeric sugar forms of MOS in different mannan hydrolysates. MOS from locust bean gum and guar gum had both α- and β-anomers while PKC and CM had only α-anomer. Growth promotional activities of different MOS were demonstrated using two probiotic Lactobacilli. Besides, enzymatically derived MOS also showed metal (Fe2+) chelating and anti-oxidant activities, wherein best anti-glycating agent was evaluated as MOS from PKC. PKC derived MOS showed highest cytotoxicity (74.19%) against human colon adenocarcinoma cell line (Caco-2). This study demonstrated the prebiotic potential of agro-waste derived MOS and possibility of their utilization as a functional food ingredient.
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Affiliation(s)
- Uttam Kumar Jana
- Department of Microbiology, Dr. Harisingh Gour Vishwavidyalaya (A Central University), Sagar 470003, Madhya Pradesh, India.
| | - Naveen Kango
- Department of Microbiology, Dr. Harisingh Gour Vishwavidyalaya (A Central University), Sagar 470003, Madhya Pradesh, India.
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24
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Zhang YH, Shao Y, Jiao C, Yang QM, Weng HF, Xiao AF. Characterization and Application of an Alginate Lyase, Aly1281 from Marine Bacterium Pseudoalteromonas carrageenovora ASY5. Mar Drugs 2020; 18:E95. [PMID: 32023889 PMCID: PMC7073683 DOI: 10.3390/md18020095] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 01/28/2020] [Accepted: 01/30/2020] [Indexed: 12/13/2022] Open
Abstract
Alginate extracted from widely cultured brown seaweed can be hydrolyzed by alginate lyase to produce alginate oligosaccharides (AOS) with intriguing biological activities. Herein, a novel alginate lyase Aly1281 was cloned from marine bacterium Pseudoalteromonas carrageenovora ASY5 isolated from mangrove soil and found to belong to polysaccharide lyase family 7. Aly1281 exhibited maximum activity at pH 8.0 and 50 °C and have broad substrate specificity for polyguluronate and polymannuronate. Compared with other alginate lyases, Aly1281 exhibited high degradation specificity and mainly produced di-alginate oligosaccharides which displayed good antioxidant function to reduce ferric and scavenge radicals such as hydroxyl, ABTS+ and DPPH. Moreover, the catalytic activity and kinetic performance of Aly1281 were highly improved with the addition of salt, demonstrating a salt-activation property. A putative conformational structural feature of Aly1281 was found by MD simulation analysis for understanding the salt-activation effect.
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Affiliation(s)
- Yong-Hui Zhang
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China; (Y.-H.Z.); (Y.S.); (C.J.); (Q.-M.Y.); (H.-F.W.)
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Yuan Shao
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China; (Y.-H.Z.); (Y.S.); (C.J.); (Q.-M.Y.); (H.-F.W.)
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Chao Jiao
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China; (Y.-H.Z.); (Y.S.); (C.J.); (Q.-M.Y.); (H.-F.W.)
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Qiu-Ming Yang
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China; (Y.-H.Z.); (Y.S.); (C.J.); (Q.-M.Y.); (H.-F.W.)
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Hui-Fen Weng
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China; (Y.-H.Z.); (Y.S.); (C.J.); (Q.-M.Y.); (H.-F.W.)
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - An-Feng Xiao
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China; (Y.-H.Z.); (Y.S.); (C.J.); (Q.-M.Y.); (H.-F.W.)
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
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25
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Characterization of a novel alkaline β-agarase and its hydrolysates of agar. Food Chem 2019; 295:311-319. [DOI: 10.1016/j.foodchem.2019.05.132] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 05/19/2019] [Accepted: 05/20/2019] [Indexed: 11/19/2022]
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26
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Lin F, Yang D, Huang Y, Zhao Y, Ye J, Xiao M. The Potential of Neoagaro-Oligosaccharides as a Treatment of Type II Diabetes in Mice. Mar Drugs 2019; 17:md17100541. [PMID: 31547097 PMCID: PMC6835453 DOI: 10.3390/md17100541] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Revised: 09/10/2019] [Accepted: 09/16/2019] [Indexed: 01/05/2023] Open
Abstract
Type 2 diabetes mellitus (T2DM) accounts for more than 90% of cases of diabetes mellitus, which is harmful to human health. Herein, neoagaro-oligosaccharides (NAOs) were prepared and their potential as a treatment of T2DM was evaluated in KunMing (KM) mice. Specifically, a T2DM mice model was established by the combination of a high-fat diet (HFD) and alloxan injection. Consequently, the mice were given different doses of NAOs (100, 200, or 400 mg/kg) and the differences among groups of mice were recorded. As a result of the NAOs treatment, the fasting blood glucose (FBG) was lowered and the glucose tolerance was improved as compared with the model group. As indicated by the immunohistochemistry assay, the NAOs treatment was able to ameliorate hepatic macrovesicular steatosis and hepatocyte swelling, while it also recovered the number of pancreatic β-cells. Additionally, NAOs administration benefited the antioxidative capacity in mice as evidenced by the upregulation of both glutathione peroxidase and superoxide dismutase activity and the significant reduction of the malondialdehyde concentration. Furthermore, NAOs, as presented by Western blotting, increased the expression of p-ERK1/2, p-JNK, NQO1, HO-1, and PPARγ, via the MAPK, Nrf2, and PPARγ signaling pathways, respectively. In conclusion, NAOs can be used to treat some complications caused by T2DM, and are beneficial in controlling the level of blood glucose and ameliorating the damage of the liver and pancreatic islands.
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Affiliation(s)
- Fudi Lin
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
| | - Dongda Yang
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
| | - Yayan Huang
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
| | - Yan Zhao
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
| | - Jing Ye
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
- Xiamen Engineering and Technological Research Center for Comprehensive Utilization of Marine Biological Resources, Xiamen 361021, China.
| | - Meitian Xiao
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
- Xiamen Engineering and Technological Research Center for Comprehensive Utilization of Marine Biological Resources, Xiamen 361021, China.
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27
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Liu J, Liu Z, Jiang C, Mao X. Biochemical Characterization and Substrate Degradation Mode of a Novel α-Agarase from Catenovulum agarivorans. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:10373-10379. [PMID: 31453692 DOI: 10.1021/acs.jafc.9b03073] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Agarose can be hydrolyzed into agarooligosaccharides (AOSs) by α-agarase, which is an important enzyme for efficient saccharification of agarose or preparation of bioactive oligosaccharides from agarose. Although many β-agarases have been reported and characterized, there are only a few studies on α-agarases. Here, we cloned a novel α-agarase named CaLJ96 with a molecular weight of approximately 200 kDa belonging to glycoside hydrolase family 96 from Catenovulum agarivorans. CaLJ96 has good pH stability and exhibits maximum activity at 37 °C and pH 7.0. The hydrolyzed products of agarose by CaLJ96 are analyzed as agarobiose (A2), agarotetraose (A4), and agarohexaose (A6), in which A4 is the dominant product. CaLJ96 can hydrolyze agaropentaose (A5) into A2 and agarotriose (A3) and A6 into A2 and A4 but cannot act on A2, A3, or A4. This is the first report to characterize the α-agarase action on AOSs in detail. Therefore, CaLJ96 has potential for the manufacture of bioactive AOSs.
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Affiliation(s)
- Jie Liu
- College of Food Science and Engineering , Ocean University of China , Qingdao 266003 , China
| | - Zhen Liu
- College of Food Science and Engineering , Ocean University of China , Qingdao 266003 , China
| | - Chengcheng Jiang
- College of Food Science and Engineering , Ocean University of China , Qingdao 266003 , China
| | - Xiangzhao Mao
- College of Food Science and Engineering , Ocean University of China , Qingdao 266003 , China
- Laboratory for Marine Drugs and Bioproducts , Qingdao National Laboratory for Marine Science and Technology , Qingdao 266237 , China
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28
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Zhang YH, Song XN, Lin Y, Xiao Q, Du XP, Chen YH, Xiao AF. Antioxidant capacity and prebiotic effects of Gracilaria neoagaro oligosaccharides prepared by agarase hydrolysis. Int J Biol Macromol 2019; 137:177-186. [DOI: 10.1016/j.ijbiomac.2019.06.207] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 06/20/2019] [Accepted: 06/26/2019] [Indexed: 12/11/2022]
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29
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Mohd Thani N, Mustapa Kamal SM, Sulaiman A, Taip FS, Omar R, Izhar S. Sugar Recovery from Food Waste via Sub-critical Water Treatment. FOOD REVIEWS INTERNATIONAL 2019. [DOI: 10.1080/87559129.2019.1636815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Nurfatimah Mohd Thani
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia
| | - Siti Mazlina Mustapa Kamal
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia
| | - Alifdalino Sulaiman
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia
| | - Farah Saleena Taip
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia
| | - Rozita Omar
- Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia
| | - Shamsul Izhar
- Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia
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30
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Torres MD, Flórez-Fernández N, Domínguez H. Integral Utilization of Red Seaweed for Bioactive Production. Mar Drugs 2019; 17:E314. [PMID: 31142051 PMCID: PMC6627364 DOI: 10.3390/md17060314] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 05/21/2019] [Accepted: 05/22/2019] [Indexed: 01/08/2023] Open
Abstract
The hydrocolloids carrageenan and agar are the major fraction industrially extracted and commercialized from red seaweeds. However, this type of macroalgae also contains a variety of components with nutritional, functional and biological properties. In the context of sustainability and bioeconomy, where the integral utilization of the natural resources is incentivized, the sequential separation and valorization of seaweed components with biological properties of interest for food, nutraceuticals, cosmeceuticals and pharmaceuticals is proposed. In this work, a review of the available conventional and alternative greener and efficient extraction for obtaining red seaweed bioactives is presented. The potential of emerging technologies for the production of valuable oligomers from carrageenan and agar is also commented, and finally, the sequential extraction of the constituent fractions is discussed.
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Affiliation(s)
- Maria Dolores Torres
- Department of Chemical Engineering, Faculty of Sciences, University of Vigo, Campus Ourense, As Lagoas, 32004 Ourense, Spain.
| | - Noelia Flórez-Fernández
- Department of Chemical Engineering, Faculty of Sciences, University of Vigo, Campus Ourense, As Lagoas, 32004 Ourense, Spain.
| | - Herminia Domínguez
- Department of Chemical Engineering, Faculty of Sciences, University of Vigo, Campus Ourense, As Lagoas, 32004 Ourense, Spain.
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31
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Abstract
A simple method for obtaining pure and well-defined oligosaccharides was established by hydrolyzing agar with β-agarase from Vibrio natriegens. The conditions for enzymolysis were optimized as follows: a temperature of 45 °C, a pH of 8.5, a substrate concentration of 0.3%, an enzyme amount of 100 U/g and an enzymolysis time of 20 h. Neoagaro-oligosaccharides with different degrees of polymerization were obtained by hydrolyzing agar with β-agarase for different lengths of time. After removing pigments using activated carbon and salts by dialyzing, the enzyme hydrolysis solution was separated with Bio-Gel P2 column chromatography. Neoagaro-oligosaccharides with different degrees of polymerization were acquired. By comparing with authentic standard substances, along with further confirmation by FTIR, MS and NMR, structures of the purified neoagaro-oligosaccharides were identified as neoagarobiose (NA2), neoagaroteraose (NA4), neoagarohexaose (NA6), neoagarooctaose (NA8), neoagaro-decaose (NA10) and neoagarododecaose (NA12) with purities of more than 97.0%. The present study established a method for the preparation of various neoagaro-oligosaccharides that may be of great significance for further study of their bioactivities.
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32
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Han Z, Zhang Y, Yang J. Biochemical Characterization of a New β-Agarase from Cellulophaga Algicola. Int J Mol Sci 2019; 20:ijms20092143. [PMID: 31052274 PMCID: PMC6539560 DOI: 10.3390/ijms20092143] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 03/29/2019] [Indexed: 01/01/2023] Open
Abstract
Cellulophaga algicola DSM 14237, isolated from the Eastern Antarctic coastal zone, was found to be able to hydrolyze several types of polysaccharide materials. In this study, a predicted β-agarase (CaAga1) from C. algicola was heterologously expressed in Escherichia coli. The purified recombinant CaAga1 showed specific activities of 29.39, 20.20, 14.12, and 8.99 U/mg toward agarose, pure agar, and crude agars from Gracilaria lemaneiformis and Porphyra haitanensis, respectively. CaAga1 exhibited an optimal temperature and pH of 40 °C and 7, respectively. CaAga1 was stable over a wide pH range from 4 to 11. The recombinant enzyme showed an unusual thermostability, that is, it was stable at temperature below or equal to 40 °C and around 70 °C, but was thermolabile at about 50 °C. With the agarose as the substrate, the Km and Vmax values for CaAga1 were 1.19 mg/mL and 36.21 U/mg, respectively. The reducing reagent (dithiothreitol) enhanced the activity of CaAga1 by more than one fold. In addition, CaAga1 was salt-tolerant given that it retained approximately 70% of the maximum activity in the presence of 2 M NaCl. The thin layer chromatography results indicated that CaAga1 is an endo-type β-agarase and efficiently hydrolyzed agarose into neoagarotetraose (NA4) and neoagarohexaose (NA6). A structural model of CaAga1 in complex with neoagarooctaose (NA8) was built by homology modeling and explained the hydrolysis pattern of CaAga1.
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Affiliation(s)
- Zhenggang Han
- College of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan 430023, China.
| | - Yuxi Zhang
- College of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan 430023, China.
| | - Jiangke Yang
- College of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan 430023, China.
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33
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Xiao Q, Liu C, Ni H, Zhu Y, Jiang Z, Xiao A. β-Agarase immobilized on tannic acid-modified Fe3O4 nanoparticles for efficient preparation of bioactive neoagaro-oligosaccharide. Food Chem 2019; 272:586-595. [DOI: 10.1016/j.foodchem.2018.08.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Revised: 07/31/2018] [Accepted: 08/03/2018] [Indexed: 10/28/2022]
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34
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Oligosaccharides Derived from Red Seaweed: Production, Properties, and Potential Health and Cosmetic Applications. Molecules 2018; 23:molecules23102451. [PMID: 30257445 PMCID: PMC6222765 DOI: 10.3390/molecules23102451] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 09/17/2018] [Accepted: 09/21/2018] [Indexed: 12/30/2022] Open
Abstract
Because of their potential use as functional ingredients in human nutrition, oligosaccharides derived from natural sources are receiving paramount consideration. Red seaweed, a proven rich source of agar and carrageenan, is one of the most abundantly present sources of such oligosaccharides. Agaro-oligosaccharides (AOS) and carrageenan-oligosaccharides (COS) are produced from agar and carrageenan, respectively, through chemical and enzymatic hydrolyses. Enzymatic hydrolysis of agar and carrageenan into oligosaccharides is preferred in industrial production because of certain problems associated with chemical hydrolysis, including the release of high amounts of monosaccharides and undesirable toxic products, such as furfural. AOS and COS possess many biological activities, including prebiotic, immuno-modulatory, anti-oxidant, and anti-tumor activities. These activities are related to their chemical structure, molecular weight, degree of polymerization, and the flexibility of the glycosidic linkages. Therefore, the structure–function relationship and the mechanisms occurring during the specific biological applications of AOS and COS are discussed herein. Moreover, the chromatographic separation, purification, and characterization of AOS and COS are also part of this review. This piece of writing strives to create a new perspective on the potential applications of AOS and COS in the functional food and pharmaceutical industry.
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35
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Future direction in marine bacterial agarases for industrial applications. Appl Microbiol Biotechnol 2018; 102:6847-6863. [DOI: 10.1007/s00253-018-9156-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 06/01/2018] [Accepted: 06/04/2018] [Indexed: 12/13/2022]
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36
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Xu SY, Kan J, Hu Z, Liu Y, Du H, Pang GC, Cheong KL. Quantification of Neoagaro-Oligosaccharide Production through Enzymatic Hydrolysis and Its Anti-Oxidant Activities. Molecules 2018; 23:E1354. [PMID: 29874799 PMCID: PMC6100174 DOI: 10.3390/molecules23061354] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 06/02/2018] [Accepted: 06/04/2018] [Indexed: 12/04/2022] Open
Abstract
Neoagaro-oligosaccharides (NAOS) have health benefits that are related to their amount and degree of polymerization (DP). However, the current methods that are used to quantify enzymatically released NAOS are un-specific and time-consuming. Agar has been extracted from Gelidium amansii and has been degraded by AgaXa (a recombinant β-agarase). Polysaccharide analysis using carbohydrate gel electrophoresis (PACE) has been adapted in order to quantify NAOS. In addition, the anti-oxidant activity of the degraded samples has been assessed. We have found that the PACE method provided sensitive, precise, and accurate quantification for each of the six NAOS samples. PACE has revealed that the DP of the enzymatic products from the AgaXa digestion were mainly neoagaro-octaose and neoagaro-decaose. The degraded samples exhibited increased radical-scavenging activity towards 2,2-diphenyl-1-picrylhydrazyl and 2,2-azino-bis(3-ethylbenzothiazoline sulfonic acid) radicals. While the anti-oxidant activity may have been from NAOS activity and contributions from neoagaro-octaose and neoagaro-decaose. The adapted PACE method that has been presented here is promising for large sample analysis during quality control and for characterizing novel β-agarase degradation mechanisms.
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Affiliation(s)
- Shu-Ying Xu
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Department of Biology, College of Science, Shantou University, Shantou 515063, China.
| | - Jie Kan
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Department of Biology, College of Science, Shantou University, Shantou 515063, China.
| | - Zhong Hu
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Department of Biology, College of Science, Shantou University, Shantou 515063, China.
| | - Yang Liu
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Department of Biology, College of Science, Shantou University, Shantou 515063, China.
| | - Hong Du
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Department of Biology, College of Science, Shantou University, Shantou 515063, China.
| | - Guang-Chang Pang
- Tianjin Key Laboratory of Food Biotechnology, Faculty of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China.
| | - Kit-Leong Cheong
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Department of Biology, College of Science, Shantou University, Shantou 515063, China.
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37
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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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38
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Liang Y, Ma X, Zhang L, Li F, Liu Z, Mao X. Biochemical Characterization and Substrate Degradation Mode of a Novel Exotype β-Agarase from Agarivorans gilvus WH0801. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:7982-7988. [PMID: 28817933 DOI: 10.1021/acs.jafc.7b01533] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Agarases are important hydrolytic enzymes for the biodegradation of agar. Understanding the degradation mode and hydrolysis products of agarases is essential for their utilization in oligosaccharide preparations. Herein, we cloned and expressed AgWH50B, a novel neoagarotetraose-forming β-agarase from Agarivorans gilvus WH0801 that has high specific activity and a fast reaction rate. AgWH50B consists of a C-terminal glycoside hydrolase family 50 catalytic domain with two tandem noncatalytic carbohydrate-binding modules (CBMs) in the N-terminus (residues 45-214 and 236-442). AgWH50B exhibited good enzymatic properties with high specific activity and catalytic efficiency (1523.2 U/mg and a Vmax of 1700 μmol/min/mg) under optimal hydrolysis conditions of pH 7.0 and 40 °C. Analysis of the hydrolysis products revealed that this enzyme is an exotype β-agarase and that the dominant product of agarose or oligosaccharide degradation was neoagarotetraose. These findings suggest that AgWH50B could be utilized to yield abundant neoagarotetraose.
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Affiliation(s)
- Yunxiao Liang
- College of Food Science and Engineering, Ocean University of China , Qingdao 266003, China
| | - Xiaoqing Ma
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao 266101, China
| | - Lujia Zhang
- College of Food Science and Engineering, Ocean University of China , Qingdao 266003, China
- School of Chemistry and Molecular Engineering, East China Normal University , Shanghai 200241, China
| | - Fuli Li
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao 266101, China
| | - Zhen Liu
- College of Food Science and Engineering, Ocean University of China , Qingdao 266003, China
| | - Xiangzhao Mao
- College of Food Science and Engineering, Ocean University of China , Qingdao 266003, China
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39
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Xu XQ, Su BM, Xie JS, Li RK, Yang J, Lin J, Ye XY. Preparation of bioactive neoagaroligosaccharides through hydrolysis of Gracilaria lemaneiformis agar: A comparative study. Food Chem 2017; 240:330-337. [PMID: 28946280 DOI: 10.1016/j.foodchem.2017.07.036] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 05/07/2017] [Accepted: 07/10/2017] [Indexed: 10/19/2022]
Abstract
Hydrolysis of Gracilaria lemaneiformis agar by β-agarase was compared with HCl hydrolysis. The results showed that optimum catalysis conditions for the β-agarase were pH 7.0 at 45°C. Mass spectroscopy, thin-layer chromatography and GPC results showed that the polymerization degrees of the hydrolysis products by the β-agarase were mainly four, six and eight (more specific than the hydrolysate by HCl). The enzymatic degradation products of agar were distinctly different from those of HCl hydrolysis in the ratios among galactose and 3,6-anhydro-galactose and sulfate group contents. The NMR spectrometry proved that the products of β-agarase were neoagaroligosaccharides, which was not found in the agarolytic products by HCl. The neoagarotetraose inhibited tyrosinase activity competitively with the KI value of 16.0mg/ml. Hydroxyl radical-scavenging ability of neoagaroligosaccharides was much greater than that of agar HCl hydrolysate. This work suggests that neoagaroligosaccharide products produced by our β-agarase could be more effective in function than products from acid hydrolysis.
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Affiliation(s)
- Xin-Qi Xu
- Fujian Key Laboratory of Marine Enzyme Engineering, College of Biological Sciences and Technology, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Bing-Mei Su
- Fujian Key Laboratory of Marine Enzyme Engineering, College of Biological Sciences and Technology, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Jin-Sheng Xie
- Fujian Key Laboratory of Marine Enzyme Engineering, College of Biological Sciences and Technology, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Ren-Kuan Li
- Fujian Key Laboratory of Marine Enzyme Engineering, College of Biological Sciences and Technology, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Jie Yang
- Fujian Key Laboratory of Marine Enzyme Engineering, College of Biological Sciences and Technology, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Juan Lin
- Fujian Key Laboratory of Marine Enzyme Engineering, College of Biological Sciences and Technology, Fuzhou University, Fuzhou, Fujian 350116, China.
| | - Xiu-Yun Ye
- Fujian Key Laboratory of Marine Enzyme Engineering, College of Biological Sciences and Technology, Fuzhou University, Fuzhou, Fujian 350116, China.
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40
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Xiao A, Xiao Q, Lin Y, Ni H, Zhu Y, Cai H. Efficient immobilization of agarase using carboxyl-functionalized magnetic nanoparticles as support. ELECTRON J BIOTECHN 2017. [DOI: 10.1016/j.ejbt.2016.10.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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41
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Charoensiddhi S, Lorbeer AJ, Lahnstein J, Bulone V, Franco CM, Zhang W. Enzyme-assisted extraction of carbohydrates from the brown alga Ecklonia radiata : Effect of enzyme type, pH and buffer on sugar yield and molecular weight profiles. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.07.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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42
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Biochemical Characteristics and Substrate Degradation Pattern of a Novel Exo-Type β-Agarase from the Polysaccharide-Degrading Marine Bacterium Flammeovirga sp. Strain MY04. Appl Environ Microbiol 2016; 82:4944-54. [PMID: 27260364 DOI: 10.1128/aem.00393-16] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Accepted: 06/01/2016] [Indexed: 11/20/2022] Open
Abstract
UNLABELLED Exo-type agarases release disaccharide units (3,6-anhydro-l-galactopyranose-α-1,3-d-galactose) from the agarose chain and, in combination with endo-type agarases, play important roles in the processive degradation of agarose. Several exo-agarases have been identified. However, their substrate-degrading patterns and corresponding mechanisms are still unclear because of a lack of proper technologies for sugar chain analysis. Herein, we report the novel properties of AgaO, a disaccharide-producing agarase identified from the genus Flammeovirga AgaO is a 705-amino-acid protein that is unique to strain MY04. It shares sequence identities of less than 40% with reported GH50 β-agarases. Recombinant AgaO (rAgaO) yields disaccharides as the sole final product when degrading agarose and associated oligosaccharides. Its smallest substrate is a neoagarotetraose, and its disaccharide/agarose conversion ratio is 0.5. Using fluorescence labeling and two-stage mass spectrometry analysis, we demonstrate that the disaccharide products are neoagarobiose products instead of agarobiose products, as verified by (13)C nuclear magnetic resonance spectrum analysis. Therefore, we provide a useful oligosaccharide sequencing method to determine the patterns of enzyme cleavage of glycosidic bonds. Moreover, AgaO produces neoagarobiose products by gradually cleaving the units from the nonreducing end of fluorescently labeled sugar chains, and so our method represents a novel biochemical visualization of the exolytic pattern of an agarase. Various truncated AgaO proteins lost their disaccharide-producing capabilities, indicating a strict structure-function relationship for the whole enzyme. This study provides insights into the novel catalytic mechanism and enzymatic properties of an exo-type β-agarase for the benefit of potential future applications. IMPORTANCE Exo-type agarases can degrade agarose to yield disaccharides almost exclusively, and therefore, they are important tools for disaccharide preparation. However, their enzymatic mechanisms and agarose degradation patterns are still unclear due to the lack of proper technologies for sugar chain analysis. In this study, AgaO was identified as an exo-type agarase of agarose-degrading Flammeovirga bacteria, representing a novel branch of glycoside hydrolase family 50. Using fluorescence labeling, high-performance liquid chromatography, and mass spectrum analysis technologies, we provide a useful oligosaccharide sequencing method to determine the patterns of enzyme cleavage of glycosidic bonds. We also demonstrate that AgaO produces neoagarobiose by gradually cleaving disaccharides from the nonreducing end of fluorescently labeled sugars. This study will benefit future enzyme applications and oligosaccharide studies.
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de Moura FA, Macagnan FT, da Silva LP. Oligosaccharide production by hydrolysis of polysaccharides: a review. Int J Food Sci Technol 2014. [DOI: 10.1111/ijfs.12681] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Fernanda A. de Moura
- Departamento de Tecnologia e Ciência de Alimentos; Centro de Ciências Rurais; Universidade Federal de Santa Maria (UFSM); Av. Roraima - 1000 Camobi CEP 97105-900 Santa Maria RS Brazil
| | - Fernanda T. Macagnan
- Departamento de Tecnologia e Ciência de Alimentos; Centro de Ciências Rurais; Universidade Federal de Santa Maria (UFSM); Av. Roraima - 1000 Camobi CEP 97105-900 Santa Maria RS Brazil
| | - Leila P. da Silva
- Departamento de Zootecnia; Centro de Ciências Rurais; Universidade Federal de Santa Maria (UFSM); Av. Roraima - 1000 Camobi CEP 97105-900 Santa Maria RS Brazil
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