参考文献:1. Acuna-Arguelles M.E., Gutierrez-Rojas M., Viniegra-Gonzalez G., Favela-Torres E. (1995). Production and properties of three pectinolytic activities produced by / Aspergillus niger in submerged and solid state fermentation. Appl. Microbiol. Biotechnol., 43: 808-14. CrossRef 2. Alana A., Alkorta I., Dominguez J.B., Liama M.J., Serra J.L. (1990). Pectin lyase activity in a / Penicillium italicum strain. Appl. Environ. Microbiol., 50: 3755-759. 3. Albersheim P. (1966). Pectin lyase from fungi. Methods Enzymol., 8: 628-31. CrossRef 4. Brawman J.W. (1981). Application of enzymes in fruit juice technology. In: Brich, G.G., Blakcorough N., Barker J.K., Eds., Enzymes and Food Processing, London, Applied Science, pp. 247-61. 5. Cappuccino J.G., Sherman N. (1998). Microbiology: A Laboratory Manual, 5th edn., Benjamin/Cumming, California, pp. 14-9. 6. Dinnella C., Lanzarini G., Stagni A. (1994). Immobilization of an endopectinlyase on γ-alumina: study of factors influencing biocatalytic matrix stability. J. Chem. Technol. Biotechnol., 59: 237-41. CrossRef 7. Engel P.C. (1977). Enzyme Kinetics: A Steady State Approach, Chapman and Hall London, pp. 14-5. 8. Friedrich J., Cimermenm A., Steiner W. pectinolytic enzymes by / Aspergillus niger: effect of inoculum size and potassium hexacyanoferrate II-trihydrate. Appl. Microbiol. Biotechnol., 33: 377-81. 9. Hamdy H. S. (2005). Purification and characterization of the pectin lyase produced by / Rhizopus oryzae grown on orange peels. Ann. Microbiol., 55(3): 205-11. 10. Hoondal G.S., Tewari R.P., Tweari R., Dahiya N., Beg Q.K. (2002). Microbial alkaline pectinases and their industrial applications: a review. Appl. Microbiol. Biotechnol., 59: 409-18. CrossRef 11. Ishii S., Yokotsuka T. (1972). Clarification of fruit juice by pectin transeliminase. J. Agric. Food. Chem., 20: 787-91. CrossRef 12. Jarvis M.C., Briggs S.P.H., Knox J.P. (2003). Intercellular adhesion and cell separation in plants. Plant. Cell. Environ., 26: 977-89. CrossRef 13. Laemmli U.K. (1970). Cleavage of structural proteins during the assembly of the head of bacteriophage T4. Nature (London), 227: 680-85. CrossRef 14. Linhardt R.J., Galliher P.M., Cooney C.L. (1986). Polysaccharide lyases. Appl. Biochem. Biotechnol., 12: 135-76. CrossRef 15. Lowry O.H., Rose Brough N.J., Farr A.L., Randall R.J. (1951). Protein measurement with Folin phenol reagent. J. Biol. Chem., 193: 265-75. 16. Molina S.M.G., Pelissari F.A., Vitorello C.B.M. (2001). Screening and genetic improvement of pectinolytic fungi for degumming of textile fibres. Braz. J. Microbiol., 32: 320-26. CrossRef 17. Mollet J.C., Park S.Y., Nothnagel E.A., Lord E.M. (2000). A lily stylar pectin is necessary for pollen tube adhesion to an / in vitro stylar matrix. Plant Cell, 12: 1737-749. CrossRef 18. O’Neill M.A., Albersheim P., Dravill A.G. (1990). The pectic polysaccharides of primary cell walls. In: Dey, P.M., Ed., Methods in Plant Biochemistry, Vol. 2, Academic Press, London, pp. 415-41. 19. Satyanaryana N.G., Kumar S. (2005). Microbial pectic transeliminases. Biotechnol. Lett., 27: 451-58. CrossRef 20. Taragano V.M., Pelosof A.M.R. (1999). Application of Doehlert design for water activity, pH and fermentation time, optimization for / Aspergillus niger pectinolytic activity, production in solid state and submerged fermentation. Enz. Microbiol. Technol., 25: 411-19. CrossRef 21. Werber K., Osborn M. (1969). The relative mobility or molecular weight determination by dodecyl sulfate-polyarylamide gel electrophoresis. J. Biol. Chem., 244: 4406-412. 22. Yadav S., Shastri N.V. (2004). Partial purification of an extracellular pectin lyase from a strain of / Aspergillus niger. Indian J. Microbiol., 44: 201-04. 23. Yadav S., Shastri N.V. (2005). Partial purification and characterization of a pectin lyase produced by / Penicillium oxalicum in solid-state fermentation (SSF). Indian J. Biotechnol., 4: 501-05. 24. Yadav, S., Yadav P.K., Yadav K.D.S. (2007). Pectin lyases of a few indigenous fungal strains. J. Sci. Ind. Res., 66: 601-04.
1. Department of Chemistry, Deen Dayal Upadhyaya Gorakhpur University, 273009, Gorakhpur, India 2. Department of Biotechnology, Deen Dayal Upadhyaya Gorakhpur University, 273009, Gorakhpur, India
ISSN:1869-2044
文摘
An acidic pectin lyase (E.C. 4.2.2.10) produced byAspergillus ficuum MTCC 7591 of molecular weight 31.6 kD was purified to apparent homogeneity by ion exchange and gel filtration chromatography. Eighty-six fold purification with 60% yield and a specific activity of 7.8 U/mg protein was obtained. The Km and calculated turnover number (kcat) of the purified enzyme were found to be 0.60 mg/ml and 74 s? respectively using citrus pectin as the substrate. The pH and temperature optima were 5.0 and 50°C respectively. Exposed to 24 hours at a particular pH the enzyme was found to be relatively stable in the pH range 2.0-.0. Exposed to a particular temperature for 1 hour, the enzyme retains full activity up to 40°C. Metal ions and protein inhibitors did not have significant effects on the activity of the enzyme. The enzyme has been found to be very effective in the clarification of sweet lime and orange juices.