Production, purification and characterization of L-glutaminase enzyme from Streptomyces avermitilis
| Autor: | Shaimaa Khairy Amer, Nagwa A. Abdallah, Mario Khalil Habeeb |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
L-Glutaminase Chromatography biology Metal salts chemistry.chemical_element Plant Science biology.organism_classification Microbiology Nitrogen Incubation period chemistry.chemical_compound Infectious Diseases Enzyme chemistry Biochemistry Sodium nitrate Oxidizing agent Streptomyces avermitilis |
| Zdroj: | African Journal of Microbiology Research. 7:1184-1190 |
| ISSN: | 1996-0808 |
| DOI: | 10.5897/ajmr2013.5367 |
| Popis: | Since the discovery of its anti-tumor properties, L-glutaminases have been in prime focus and microbial sources of the enzyme are sought. In the present study L-glutaminase from Streptomyces avermitilis was optimized and the results revealed that the optimum pH, temperature, inoculum size, incubation period and NaCl concentration for enzyme production were pH 8, 28°C, 5 ml/100 ml media v/v, 5 days and 3% NaCl respectively. Glucose and sodium nitrate proved to be the best carbon and nitrogen sources respectively. The enzyme was purified 8.02 fold and the apparent molecular weight of the enzyme was found to be 50 kDa. The optima pH and temperature for the enzyme were (7.0 and 8.0) and 30°C respectively. The enzyme was more stable at 4% NaCl and its activity increased when NaCl and MgSO4 were added as metal salts. The enzyme also showed high stability in the presence of different oxidizing agents. Key words: L-Glutaminase, Streptomyces avermitilis, anti-tumor, purification. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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