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Petchimuthu R, Venkatesh S, Kannan S, Balakrishnan V. Solid-state fermentation of brown seaweeds for the production of alginate lyase using marine bacterium Enterobacter tabaci RAU2C. Folia Microbiol (Praha) 2024:10.1007/s12223-024-01150-7. [PMID: 38401040 DOI: 10.1007/s12223-024-01150-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 02/08/2024] [Indexed: 02/26/2024]
Abstract
Alginate lyases have countless potential for application in industries and medicine particularly as an appealing biocatalyst for the production of biofuels and bioactive oligosaccharides. Solid-state fermentation (SSF) allows improved production of enzymes and consumes less energy compared to submerged fermentation. Seaweeds can serve as the most promising biomass for the production of biochemicals. Alginate present in the seaweed can be used by alginate lyase-producing bacteria to support growth and can secrete alginate lyase. In this perspective, the current study was directed on the bioprocessing of brown seaweeds for the production of alginate lyase using marine bacterial isolate. A novel alginate-degrading marine bacterium Enterobacter tabaci RAU2C which was previously isolated in the laboratory was used for the production of alginate lyase using Sargassum swartzii as a low-cost solid substrate. Process parameters such as inoculum incubation period and moisture content were optimized for alginate lyase production. SSF resulted in 33.56 U/mL of alginate lyase under the static condition maintained with 75% moisture after 4 days. Further, the effect of different buffers, pH, and temperature on alginate lyase activity was also analyzed. An increase in alginate lyase activity was observed with an increase in moisture content from 60 to 75%. Maximum enzyme activity was perceived with phosphate buffer at pH 7 and 37 °C. Further, the residual biomass after SSF could be employed as biofertilizer for plant growth promotion based on the preliminary analysis. To our knowledge, this is the first report stating the usage of seaweed biomass as a substrate for the production of alginate lyase using solid-state fermentation.
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Affiliation(s)
- Ramya Petchimuthu
- Department of Biotechnology, Kalasalingam Academy of Research and Education, Krishnankoil-626126, Tamilnadu, India
| | - Subharaga Venkatesh
- Department of Biotechnology, Kalasalingam Academy of Research and Education, Krishnankoil-626126, Tamilnadu, India
| | - Suriyalakshmi Kannan
- Department of Biotechnology, Kalasalingam Academy of Research and Education, Krishnankoil-626126, Tamilnadu, India
| | - Vanavil Balakrishnan
- Department of Biotechnology, Kalasalingam Academy of Research and Education, Krishnankoil-626126, Tamilnadu, India.
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da Silva WB, Porto TS, da Silva SP, de Oliveira RL. Optimization strategy for inulinase production by Aspergillus niger URM5741 and its biochemical characterization, kinetic/thermodynamic study, and application on inulin and sucrose hydrolysis. 3 Biotech 2023; 13:376. [PMID: 37881510 PMCID: PMC10593723 DOI: 10.1007/s13205-023-03790-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 09/25/2023] [Indexed: 10/27/2023] Open
Abstract
Inulinases are enzymes of great interest in the food industry, especially due to their application in the synthesis of fructose and fructo-oligosaccharides. Moreover, some inulinases (I) also present invertase activity (S), making them useful for sucrose hydrolysis processes. In the present study, the production of inulinase by Aspergillus niger URM5741 was evaluated and optimized using two statistical approaches. First, the composition of the cultivation medium was determined through a simplex centroid mixture design, followed by the selection of optimal fermentation conditions using the Box-Behnken design. Based on these experimental designs, the maximum activities of inulinase (16.68 U mL-1) and invertase (27.80 U mL-1) were achieved using a mixture of wheat, soy, and oat brans (5 g), along with 2.5% inulin and 40% moisture. The inulinase exhibited optimum temperature and pH of 60 °C and 4.0, respectively, displayed a high affinity for both substrates, as evidenced by very-low Michaelis constant values (1.07-1.54 mM). A relative thermostability was observed at 55-60 °C as indicated by half-lives values (I: 169.06-137.27 min; S: 173.29-141.52 min) and D-values (I: 561.61-456.00 min; S: 575.65-470.11 min) which were further confirmed by the high activation energy (123.01 and 143.29 kJ mol-1). The enzyme demonstrated favorable results in terms of inulin and sucrose hydrolysis, being a maximum release of reducing sugars of 6.04 and 15.80 g L-1, respectively. These results indicate that the sequential statistical approach proved to be beneficial to produce inulinase by A. niger URM5741, with the obtained enzyme considered promising for long-term industrial applications.
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Affiliation(s)
- Wanessa Braz da Silva
- School of Food Engineering, Federal University of the Agreste of Pernambuco/UFAPE, Av. Bom Pastor, Boa Vista, s/n, Garanhuns, PE 55296-901 Brazil
| | - Tatiana Souza Porto
- Department of Morphology and Animal Physiology, Federal Rural University of Pernambuco/UFRPE, Av. Dom Manoel de Medeiros, s/n, Recife, PE 52171-900 Brazil
| | - Suzana Pedroza da Silva
- School of Food Engineering, Federal University of the Agreste of Pernambuco/UFAPE, Av. Bom Pastor, Boa Vista, s/n, Garanhuns, PE 55296-901 Brazil
| | - Rodrigo Lira de Oliveira
- School of Food Engineering, Federal University of the Agreste of Pernambuco/UFAPE, Av. Bom Pastor, Boa Vista, s/n, Garanhuns, PE 55296-901 Brazil
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Production, Biochemical Characterization, and Kinetic/Thermodynamic Study of Inulinase from Aspergillus terreus URM4658. Molecules 2022; 27:molecules27196418. [PMID: 36234954 PMCID: PMC9571395 DOI: 10.3390/molecules27196418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 09/24/2022] [Accepted: 09/24/2022] [Indexed: 11/17/2022] Open
Abstract
Inulinases are enzymes involved in the hydrolysis of inulin, which can be used in the food industry to produce high-fructose syrups and fructo-oligosaccharides. For this purpose, different Aspergillus strains and substrates were tested for inulinase production by solid-state fermentation, among which Aspergillus terreus URM4658 grown on wheat bran showed the highest activity (15.08 U mL−1). The inulinase produced by this strain exhibited optimum activity at 60 °C and pH 4.0. A detailed kinetic/thermodynamic study was performed on the inulin hydrolysis reaction and enzyme thermal inactivation. Inulinase was shown to have a high affinity for substrate evidenced by very-low Michaelis constant values (0.78–2.02 mM), which together with a low activation energy (19.59 kJ mol−1), indicates good enzyme catalytic potential. Moreover, its long half-life (t1/2 = 519.86 min) and very high D-value (1726.94 min) at 60 °C suggested great thermostability, which was confirmed by the thermodynamic parameters of its thermal denaturation, namely the activation energy of thermal denaturation (E*d = 182.18 kJ mol−1) and Gibbs free energy (106.18 ≤ ΔG*d ≤ 111.56 kJ mol−1). These results indicate that A. terreus URM4658 inulinase is a promising and efficient biocatalyst, which could be fruitfully exploited in long-term industrial applications.
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El-Housseiny GS, Ibrahim AA, Yassien MA, Aboshanab KM. Production and statistical optimization of Paromomycin by Streptomyces rimosus NRRL 2455 in solid state fermentation. BMC Microbiol 2021; 21:34. [PMID: 33485318 PMCID: PMC7825151 DOI: 10.1186/s12866-021-02093-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 01/17/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Paromomycin is a 2-deoxystreptamine aminocyclitol aminoglycoside antibiotic with broad spectrum activity against Gram-negative, Gram-positive bacteria and many protozoa. This study introduces a strategy for paromomycin production through solid-state fermentation using Streptomyces rimosus subsp. paromomycinus NRRL 2455. Solid state fermentation has gained enormous attention in the development of several products because of their numerous advantages over submerged liquid fermentation. After selecting the best solid substrate, a time course study of paromomycin production was carried out followed by optimization of environmental conditions using response surface methodology. Paromomycin yields obtained using this technique were also compared to those obtained using submerged liquid fermentation. RESULTS Upon screening of 6 different substrates, maximum paromomycin concentration (0.51 mg/g initial dry solids) was obtained with the cost-effective agro-industrial byproduct, corn bran, impregnated with aminoglycoside production media. Optimization of environmental conditions using D-optimal design yielded a 4.3-fold enhancement in paromomycin concentration reaching 2.21 mg/g initial dry solids at a pH of 8.5, inoculum size of 5% v/w and a temperature of 30 °C. CONCLUSION Compared to submerged liquid fermentation, solid state fermentation resulted in comparable paromomycin concentrations, cost reduction of raw materials, less energy consumption and waste water discharge, which have major implications in industrial fermentation. Therefore, solid state fermentation is a promising alternative to submerged liquid fermentation for paromomycin production. To the best of our knowledge, this is the first report on the optimized paromomycin production through solid state fermentation process.
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Affiliation(s)
- Ghadir S. El-Housseiny
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Organization of African Unity St, POB: 11566, Cairo, Abbassia Egypt
| | - Asmaa A. Ibrahim
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Organization of African Unity St, POB: 11566, Cairo, Abbassia Egypt
| | - Mahmoud A. Yassien
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Organization of African Unity St, POB: 11566, Cairo, Abbassia Egypt
| | - Khaled M. Aboshanab
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Organization of African Unity St, POB: 11566, Cairo, Abbassia Egypt
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Singh RS, Chauhan K, Kaur N, Kumar N. Inulinase immobilization onto glutaraldehyde activated duolite XAD for the production of fructose from inulin. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2020. [DOI: 10.1016/j.bcab.2020.101699] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Singh RS, Chauhan K, Kaur K, Pandey A. Statistical optimization of solid-state fermentation for the production of fungal inulinase from apple pomace. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.biteb.2019.100364] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Singh RS, Chauhan K, Kennedy JF. Immobilization of fungal inulinase on hetero-functionalized carbon nanofibers for the production of fructose from inulin. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2019.108569] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Singh RS, Singh T, Larroche C. Biotechnological applications of inulin-rich feedstocks. BIORESOURCE TECHNOLOGY 2019; 273:641-653. [PMID: 30503580 DOI: 10.1016/j.biortech.2018.11.031] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 11/05/2018] [Accepted: 11/08/2018] [Indexed: 06/09/2023]
Abstract
Inulin is a naturally occurring second largest storage polysaccharide with a wide range of applications in pharmaceutical and food industries. It is a robust polysaccharide which consists of a linear chain of β-2, 1-linked-d-fructofuranose molecules terminated with α-d-glucose moiety at the reducing end. It is present in tubers, bulbs and tuberous roots of more than 36,000 plants belonging to both monocotyledonous and dicotyledonous families. Jerusalem artichoke, chicory, dahlia, asparagus, etc. are important inulin-rich plants. Inulin is a potent substrate and inducer for the production of inulinases. Inulin/inulin-rich feedstocks can be used for the production of fructooligosaccharides and high-fructose syrup. Additionally, inulin-rich feedstocks can also be exploited for the production of other industrially important products like acetone, butanol, bioethanol, single cell proteins, single cell oils, 2, 3-butanediol, sorbitol, mannitol, etc. Current review highlights the biotechnological potential of inulin-rich feedstocks for the production of various industrially important products.
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Affiliation(s)
- R S Singh
- Carbohydrate and Protein Biotechnology Laboratory, Department of Biotechnology, Punjabi University, Patiala 147 002, Punjab, India.
| | - Taranjeet Singh
- Carbohydrate and Protein Biotechnology Laboratory, Department of Biotechnology, Punjabi University, Patiala 147 002, Punjab, India
| | - Christian Larroche
- Université Clermont Auvergne, Institut Pascal, UMR, CNRS 6602, and Labex, IMobS3, 4 Avenue Blaise Pascal, TSA 60026, CS 60026, F-63178 Aubiere Cedex, France
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Das D, Bhat M R, Selvaraj R. Review of inulinase production using solid-state fermentation. ANN MICROBIOL 2019. [DOI: 10.1007/s13213-019-1436-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Singh RS, Chauhan K, Kennedy JF. Fructose production from inulin using fungal inulinase immobilized on 3-aminopropyl-triethoxysilane functionalized multiwalled carbon nanotubes. Int J Biol Macromol 2018; 125:41-52. [PMID: 30529206 DOI: 10.1016/j.ijbiomac.2018.11.281] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Revised: 11/30/2018] [Accepted: 11/30/2018] [Indexed: 01/22/2023]
Abstract
The main objective of the present work was to modify multiwalled carbon nanotubes (MWCNTs) using 3-aminopropyl-triethoxysilane (APTES) to generate amino-terminated surfaces for inulinase immobilization, which can be further used for fructose production. CCRD of response surface methodology was used for optimization of inulinase immobilization on MWCNTs. At optimized parameters (APTES concentration 4%; sonication time 4 h; enzyme coupling time 1.5 h and enzyme load 15 IU), maximal inulinase activity and immobilization yield was 60.7% and 74.4%, respectively. Immobilized inulinase showed same pH optima of free enzyme, while an elevation in temperature optima to 60 °C was observed after its immobilization. Immobilized inulinase also shown enhancement in pH stability and thermostability. Overall, 4.54-fold rise in half-life of inulinase was detected after immobilization at 60 °C. Km and Vmax of inulinase decreased after immobilization. Immobilized inulinase preserved 28% of its residual activity after 10 consecutive batch cycles of inulin hydrolysis for the production of fructose.
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Affiliation(s)
- Ram Sarup Singh
- Carbohydrate and Protein Biotechnology Laboratory, Department of Biotechnology, Punjabi University, Patiala 147 002, Punjab, India.
| | - Kanika Chauhan
- Carbohydrate and Protein Biotechnology Laboratory, Department of Biotechnology, Punjabi University, Patiala 147 002, Punjab, India
| | - John F Kennedy
- Chembiotech Laboratories, Advanced Science and Technology Institute, 5 The Croft, Buntsford Drive, Stoke Heath, Bromsgrove, Worcestershire B60 4JE, UK
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