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A novel thermostable dextranase from a Thermoanaerobacter species cultured from the geothermal waters of the great Artesian Basin of Australia

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Wynter, C., Patel, B.K.C., Bain, P., De Jersey, J., Hamilton, S. and Inkerman, P.A. (1996) A novel thermostable dextranase from a Thermoanaerobacter species cultured from the geothermal waters of the great Artesian Basin of Australia. FEMS Microbiology Letters, 140 (2-3). pp. 271-276. ISSN 0378-1097

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Article Link: https://doi.org/10.1111/j.1574-6968.1996.tb08348.x

Abstract

A Gram-negative sporulating thermophilic anaerobe, designated AB11Ad, was isolated from the heated waters of the Great Artesian Basin of Australia. It grew on a variety of carbohydrates including glucose, starch, and dextran and produced a thermostable and thermoactive extracellular endo-dextranase. The enzyme was produced more actively under pH controlled continuous culture conditions than under batch conditions. Ammonium sulfate precipitated crude dextranase exhibited a temperature optimum of 70 °C and a pH optimum between 5 and 6. The half life was ~ 6.5 h at 75 °C and 2 h at 80 °C at pH 5.0 and in the absence of added dextran. 16S rRNA sequence analysis indicated that isolate AB1 lAd was a member of the genus Thermoanaerobacter.

Item Type:Article
Keywords:Thermophilic bacteria, Great Artesian Basin of Australia, Thermal aquifer, Thermoanaerobacter, Thermostable dextranase
Subjects:Science > Microbiology > Bacteria
Live Archive:10 Apr 2024 00:28
Last Modified:10 Apr 2024 00:28

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