Abstract
Three extracellular pectinases were produced byAspergillus niger CH4 by submerged and solid-state fermentation, and their physicochemical and kinetic properties were studied. The highest productivities of endo- and exo-pectinase and pectin lyase were obtained with solid-state fermentation. The kinetic and physicochemical properties of these enzymes were influenced by the type of culture method used. All activities were very different in terms of pH and temperature optima, stability at different pH and temperature values and affinity for the substrate (K m values). In solid-state fermentation, all pectinase activities were more stable at extreme pH and temperature values but theK m values of endo-pectinase and pectin lyase were higher with respect to those activities obtained by the submerged-culture technique. The pectin lyase activity obtained by the submerged-culture technique showed substrate inhibition but the enzyme obtained by solid-state fermentation did not. Electrophoresis, using sodium dodecyl sulphate/polyacrylamide gel with enzymatic extracts obtained for both culture methods, showed the same number on protein bands but some differences were found in their electrophoretic position. The results obtained in this work suggest that the culture method (submerged or solid-state) may be responsible for inducing changes in some of the pectinolytic enzymes produced byA. niger.
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Acuña-Argüelles, M.E., Gutiérrez-Rojas, M., Viniegra-González, G. et al. Production and properties of three pectinolytic activities produced byAspergillus niger in submerged and solid-state fermentation. Appl Microbiol Biotechnol 43, 808–814 (1995). https://doi.org/10.1007/BF02431912
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DOI: https://doi.org/10.1007/BF02431912