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INTERNATIONAL JOURNAL OF PHARMACEUTICAL RESEARCH

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IJPR included in UGC-Approved List of Journals - Ref. No. is SL. No. 4812 & J. No. 63703

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Production of a therapeutically important Lasparginase enzyme under optimum conditions from Bacillus subtilusmutant isolate

Author: ASMAA HUSSEIN, MAYS T. ABDALLAH, HADEEL M. KHALAF
Abstract: L-asparaginase from microbial sources achieved big attention as a therapeutic agent for the treatment of some human cancers. In this work extra-cellular L-asparaginase produced from Bacillus subtilis mutant using submerged fermentation process. Bacillus subtilis was tested for L-asparaginase production using M9 medium. The isolate has been irradiated by physical method (UV irradiation by exposing the wild type to different doses of irradiation (1, 2, 3, 4, and 5 Jole/m) and irradiated eight mutants out of 60 (13.3 %) were found be able to produce enzyme with specific activity in crude filtrate for the most efficient over producer mutant (B1U1) was 1.5 U/mg protein in comparison to 0.95 U/mg protein for the wild type. Maximum production of L-asparginase was obtained by this mutant after supplementation of the minimal salt medium (pH7.5) with 0.1% glucose, 0.1% tryptone, incubated at 37oC for 24h.in shaker incubator. Under these conditions, L-asparginase production in culture supernatant was reached6 U/mg protein.
Keyword: L-asparginase, Bacillus subtilis, UV irradiation, Optimum conditions
DOI: https://doi.org/10.31838/ijpr/2019.11.04.005
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