Abstract
Two different substrates, sunflower (Helianthus annuus L.) tubers and lettuce (Lactuca sativa) roots, were tested. Using a mixture of both wastes resulted in higher production of endoinulinase than either waste alone. Also, ten fungal spe-cies grown on these substrates as inexpensive, carbon sour-ces were screened for the best production of endoinulinase activities. Of these, Aspergillus niger AUMC 9375 was the most productive, when grown on the mixture using a 6:1 w/w ratio of sun flower: lettuce, and yielded the highest levels of inulinase at 50% moisture, 30°C, pH 5.0, with seven days of incubation, and with yeast extract as the best nitrogen source. Inulinase was purified to homogeneity by ion-exchange chro-matography and gel-filtration giving a 51.11 fold purification. The mixture of sunflower tubers and lettuce roots has poten-tial to be an effective and economical substrate for inulinase production. Inulinase was successfully immobilized with an immobilization yield of 71.28%. After incubation for 2 h at 60°C, the free enzyme activity decreased markedly to 10%, whereas that of the immobilized form decreased only to 87%. A reusability test demonstrated the durability of the immo-bilized inulinase for 10 cycles and in addition, that it could be stored for 32 days at 4°C. These results indicate that this inulinase, in the immobilized form, is a potential candidate for large-scale production of high purity fructose syrups.
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C. Guerrero-Urrutia, T. Volke-Sepulveda, F. Figueroa-Martinez, E. Favela-Torres
Process Biochemistry.2021; 108: 169. CrossRef - Statistical optimization of solid-state fermentation for the production of fungal inulinase from apple pomace
Ram Sarup Singh, Kanika Chauhan, Karminder Kaur, Ashok Pandey
Bioresource Technology Reports.2020; 9: 100364. CrossRef - Optimization of inulinase production by a newly isolated strain Aspergillus flavus var. flavus by solid state fermentation of Saccharum arundinaceum
Deblina Das, Raja Selvaraj, M. Ramananda Bhat
Biocatalysis and Agricultural Biotechnology.2019; 22: 101363. CrossRef - Review of inulinase production using solid-state fermentation
Deblina Das, Ramananda Bhat M, Raja Selvaraj
Annals of Microbiology.2019; 69(3): 201. CrossRef - Immobilized inulinase: a new horizon of paramount importance driving the production of sweetener and prebiotics
Gerard Neeraj, Shobana Ravi, Ravindran Somdutt, ShriAishvarya Kaliyur Ravi, Vaidyanathan Vinoth Kumar
Critical Reviews in Biotechnology.2018; 38(3): 409. CrossRef - The cell wall anchored β-fructosidases of Lactobacillus paracasei : Overproduction, purification, and gene expression control
Petya Velikova, Kaloyan Petrov, Penka Petrova
Process Biochemistry.2017; 52: 53. CrossRef - Continuous generation of fructose from Taraxacum officinale tap root extract and inulin by immobilized inulinase in a packed-bed reactor
Hemant Kumar Rawat, Hemant Soni, Naveen Kango, C. Ganesh Kumar
Biocatalysis and Agricultural Biotechnology.2017; 9: 134. CrossRef - Biotechnological potential of microbial inulinases: Recent perspective
Hemant Kumar Rawat, Hemant Soni, Helen Treichel, Naveen Kango
Critical Reviews in Food Science and Nutrition.2017; 57(18): 3818. CrossRef - Development of heterogeneous preparation with inulinase for tubular reactor systems
M.G. Holyavka, M.P. Evstigneev, V.G. Artyukhov, V.V. Savin
Journal of Molecular Catalysis B: Enzymatic.2016; 129: 1. CrossRef - Recent insights in enzymatic synthesis of fructooligosaccharides from inulin
Ram Sarup Singh, Rupinder Pal Singh, John F. Kennedy
International Journal of Biological Macromolecules.2016; 85: 565. CrossRef - Production of inulinase, fructosyltransferase and sucrase from fungi on low-value inulin-rich substrates and their use in generation of fructose and fructo-oligosaccharides
Hemant Kumar Rawat, Mohd Anis Ganaie, Naveen Kango
Antonie van Leeuwenhoek.2015; 107(3): 799. CrossRef