An acid phosphatase associated with the cell membranes of Mycoplasma fermentans was released from the membranes with Triton X-100, then purified by ion-exchange chromatography on DEAE-Sephacel and CM-Sepharose, followed by affinity chromatography on Con A-Sepharose. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis of the purified enzyme revealed a single band with a molecular mass of 31.2 kilodaltons. The enzyme activity toward p-nitrophenyl phosphate was enhanced remarkably by Cu2+, Co2+ and Mg2+, but the activity was not inhibited by EDTA. The enzyme dephosphorylated 0-phospho-L-tyrosine as well as p-nitrophenyl phosphate, but not O-phospho-L-threonine, O-phospho-L-serine, glucose-l-phosphate, phosphoryl choline and adenosine triphosphate. The level of the 0-phospho-L-tyrosine phosphatase activity was the highest in Mycoplasma faucium and the second highest in Mycoplasma fermentans of all tested human mycoplasmas.
|Number of pages||5|
|Journal||MICROBIOLOGY and IMMUNOLOGY|
|Publication status||Published - Jan 1 1994|
- Acid phosphatase
- Mycoplasma fermentans
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