Properties of a partially purified acid phosphatase from pathogenic Nocardia brasiliensis |
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Authors: | Lourdes S. Colón Nydia M. Jiménez Hinda Zlotnik |
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Affiliation: | (1) Department of Microbiology and Medical Zoology, Medical School, University of Puerto Rico, 00936-5067 San Juan, PR, USA;(2) Present address: Department of Biochemistry, Eli Lilly Industries, Pueblo Station, Box 1198, 00628-1198 Carolina, PR, USA;(3) Present address: Lederle Parenterals, Inc, Pueblo Station, Box AC, 00987 Carolina, PR, USA |
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Abstract: | Like many other bacteria, Nocardia sp. possess acid phosphatase activity. In N. brasiliensis, a human and animal pathogen, this activity was resolved into two enzyme forms by native gel electrophoresis. One (isozyme I) was partially purified and characterized. It exhibited an estimated molecular weight on SDS-PAGE of 50 kDa, a pH optimum of 5.2, and a Km value of 1.25 mM for p-nitrophenylphosphate. The N. brasiliensis enzyme was stable at 4 °C for at least 24 h, but readily inactivated at 60 °C. Ammonium molybdate, sodium fluoride and L-(+)-tartrate were found to be potent inhibitors of the enzyme. Although its function is presently unknown, by analogy to other bacterial systems it could be envisioned to play an important role in the physiology and pathogenicity of the microorganism. |
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Keywords: | Acid phosphatase Nocardia brasiliensis pathogenic |
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