Journal of Chemical and Pharmaceutical Research (ISSN : 0975-7384)

header
Reach Us reach to JOCPR whatsapp-JOCPR +44 1625708989
All submissions of the EM system will be redirected to Online Manuscript Submission System. Authors are requested to submit articles directly to Online Manuscript Submission System of respective journal.

Original Articles: 2016 Vol: 8 Issue: 4

Partial characterization of L-asparaginase-producing by Streptomyces sp. SAH1_CWMSG isolated from Rizosphere soil in Egypt

Abstract

Fifty Streptomyces isolates were collected and screened for their capability for L-asparaginase (L-ASNase) activity. The SAH1_CWMSG isolate was found to be a promising L-ASNase producer. The SAH1_CWMSG strain possesses phenotypic characteristics typical of Streptomyces. Further phylogenetic analysis of the 16S rRNA gene sequence confirmed (99%) similarity with Streptomyces ghanensis. The strain was named Streptomyces ghanensis SAH1_CWMSG (Gen Bank ID: KT953341).The crude enzyme showed an antifungal activity against common fungal strains. In vitro, anticancer evaluation revealed that the pure enzyme exerted its action in HepG2 and MCF-7 cancer cell lines and showed promising anticancer activity compared to doxorubicin. SAH1_CWMSG strain produced L-ASNase activity of 13 IU under submerged fermentation by shake flask. The maximal activity of 106.90 IU was obtained using ammonium sulfate as nitrogen source at 28°C and 120 h on 200 rpm. The purified enzyme has Km and Vmax of 27 mMol and 69 IU/mL, respectively, with molecular weight of 38 kDa by SDS-PAGE. This is the first report on the production and characterization of L-ASNase by the SAH1_CWMSG strain. These results provided additional information on L-ASNase production and its application as an anticancer agent