Abstract.
Thermostable acid phosphatase (APase) from thermoacidophilic archaeon Sulfolobus acidocaldarius was isolated, partially purified, and characterized. The optimum pH and temperature of the enzyme for p-nitrophenylphosphate (pNPP) as a substrate were 5.0 and 70°C, respectively. The apparent K m value was 1.9 mM. This APase showed a native molecular mass of 20 kDa on a gel filtration chromatography. Of the APase activity, 60% remained after 60 min of heat treatment at 75°C. To confirm whether the APase is active in the monomeric form, we attempted to elute the enzyme from SDS-polyacrylamide gels with Disk electrophoresis apparatus and renature the enzyme. The APase activity was recovered up to 50% in the 14- to 35-kDa range, and maximum around 25 kDa. These results suggest that this APase is monomeric protein.
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Received: 8 July 1999 / Accepted: 9 August 1999
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Kurosawa, N., Fukuda, K., Itoh, Y. et al. Partial Purification and Characterization of Thermostable Acid Phosphatase from Thermoacidophilic Archaeon Sulfolobus acidocaldarius . Curr Microbiol 40, 57–60 (2000). https://doi.org/10.1007/s002849910011
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DOI: https://doi.org/10.1007/s002849910011