Purification and some properties of beta-fructofuranosidase I from Arthrobacter sp. K-1.
Arthrobacter sp. K-1, isolated from soil, produces beta-fructofuranosidase. This enzyme preparation was separated into three fractions (I, II, and III) by butyl-Toyopearl 650 M column chromatography. The beta-fructofuranosidase I was purified to homogeneity by disc-electrophoresis after consecutive column chromatographies. The enzyme had a molecular weight of 52,000 by SDS-polyacrylamide gel electrophoresis and 51,000 by gel filtration with Ultrogel AcA 44, and an isoelectric point of 4.3. The enzyme was most active at pH 6.5-6.8 and at 55 degrees C and stable up to 45 degrees C at pH 6.5 for 30 min of incubation, and from pH 5.5 to 10.0 at 40 degrees C in 2 hr of incubation. This enzyme hydrolyzed sucrose, erlose, raffinose, fructosylxyloside, neokestose, and stachyose at the relative velocities of 100, 75, 61, 59, 54, and 11, but hardly hydrolyzed 1-kestose and nystose (less than 0.02).
Osaka Municipal Technical Research Institute, Japan.
K
K
Fujita
K
K
Hara
H
H
Hashimoto
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S
Kitahata
D001173:Arthrobacter / Q000201:enzymology*; D002240:Carbohydrate Sequence; D002850:Chromatography, Gel; D002851:Chromatography, High Pressure Liquid; D004591:Electrophoresis, Polyacrylamide Gel; D004795:Enzyme Stability; D006026:Glycoside Hydrolases / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D007526:Isoelectric Point; D007700:Kinetics; D008969:Molecular Sequence Data; D008970:Molecular Weight; D013379:Substrate Specificity; D043324:beta-Fructofuranosidase
D006026:Glycoside Hydrolases; D043324:beta-Fructofuranosidase