Purification and Some Properties of Nucleases from Shii-take,Lentinus edodes |
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Authors: | Kinji Endo Yōko Umeyama Junko Nakajima Hiroyasu Kawai |
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Institution: | Department of Food Science and Nutrition, Nara Women’s University, Nara, 630, Japan |
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Abstract: | Three kinds of nuclease preparations, each of which having both endonuclease activity that formed 5′-mononucleotides and 3′-nucleotidase activity, were separated and partially purified from Shii-take, Lentinus edodes. Both enzyme activities of each preparation showed a similar thermostability and electrophoretic mobility on Polyacrylamide gel, and a competitive relationship was observed between RNA and 3′-AMP in their enzyme reactions. From these results, it is concluded that both enzyme activities of these three preparations reside in a single protein, respectively. They resemble one another in substrate specificity, cleavage pattern of RNA and thermostability, but are distinguishable from one another by molecular weight, electrophoretic mobility and optimum pH for degradation of RNA. |
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Keywords: | chitosan-salicylic acid salt chitosan-gentisic acid salt chitosan-aspirin salt type III salt of chitosan 5/3 conformation of chitosan |
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