Bioscience, Biotechnology and Biochemistry p. 1705 - 1709 (1997)
Update date:2022-08-10
Topics:
Saito, Katsuichi
Goto, Hiroko
Yokota, Atsushi
Tomita, Fusao
A bacterial strain, GS-9, isolated from soil as a levan-degrading microorganism produced an extracellular enzyme that converted levan into DFA IV. This strain was identified as Arthrobacter nicotinovorans. The DFA IV-producing enzyme was specifically induced by levan. The enzyme was purified 60-fold from culture supernatant to give a single band on SDS-PAGE. The molecular weight of this enzyme was 52,000 by SDS-PAGE and a monomer by gel filtration. The enzyme gave DFA IV as a main product (>75%), and fructose, levanbiose, and two unidentified oligosaccharides as minor products, and was identified as a novel levan fructotransferase.
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