Process Optimization of L-Glutaminase Production; a Tumour Inhibitor from Marine Endophytic Isolate Aspergillus sp. ALAA-2000Mervat Morsy Abbas Ahmed1,2*, Taher M Taha3,4, Nageh F Abo-Dahab3 and Fareed SM Hassan3
- *Corresponding Author:
- Mervat Morsy Abbas Ahmed
Department of Biological Sciences
Faculty of Sciences
King Abdulaziz University (KAU)
E-mail: [email protected]
Received Date: July 03, 2016; Accepted Date: July 29, 2016; Published Date: August 09, 2016
Citation: Ahmed MMA, Taha TM, Abo-Dahab NF, Hassan FSM (2016) Process Optimization of L-Glutaminase Production; a Tumour Inhibitor from Marine Endophytic Isolate Aspergillus sp. ALAA-2000. J Microb Biochem Technol 8: 382- 389. doi: 10.4172/1948-5948.1000313
Copyright: © 2016 Abd-El-Karem Y, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
L-Glutaminases have received significant attention recently owing to their potential applications. All endophytic fungi recovered from the marine soft sponge Aplysina fistularis were able to produce L-glutaminase. During screening program, Aspergillus sp. ALAA-2000 showed the highest L-glutaminase production levels. The production of L-glutaminase by Aspergillus sp. ALAA-2000 was evaluated under different fermentation modes and parameters. The L-glutaminase synthesis was increased their yield after the optimization of fermentation parameters. The hot water 40°C was the best leaching agent extracted of soy bean for L-glutaminase production (21.89 U/ml) under solid state fermentation (SSF). The highest L-glutaminase activity (91.92 U/ml) was achieved after two days incubation period under submerged fermentation (SmF). L-glutamine, dextrose, cysteine and Magnesium chloride supported the highest L-glutaminase production by Aspergillus sp. ALAA-2000 under SmF at pH 4 and 27°C. Single peak of L-glutaminase was obtained from the culture supernatant of Aspergillus sp. ALAA-2000 through ammonium sulfate precipitation and DEAE-cellulose column chromatographyrefer to the mono meric nature of L-glutaminase enzyme. The parameters of purified L-glutaminase were optimized as follow: pH 10, stable at 40°C to 50°C, reaction time 30 min and substrate concentration 4.38 mg/ml. Whereas the maximum activator cation is Na+ and different EDTA concentrations have no effect on L-glutaminase activity which means that L-glutaminase enzymes was represent as a non-metallic enzyme.