Isolation and Identification of Glucose Oxidase Hyper Producing Strain of Aspergillus niger.
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Date
2014-02
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Abstract
Aims: Glucose oxidase is an enzyme with large scale applications in various industries. It
is also used in several diagnostic kits which makes it medically important as well. Our aim
was to isolate indigenous glucose oxidase hyper producing strain of Aspergillus niger
from different soil samples of Punjab, Pakistan.
Study Design: An experimental study.
Place and Duration of Study: Institute of Industrial Biotechnology, GC University,
Lahore from March 2011 to July 2012.
Methodology: Two hundred and seventy nine fungal strains were isolated from soil of
different localities of Punjab. Isolates were screened for glucose oxidase production using
submerged fermentation. Glucose oxidase hyper producer isolate was identified using
morphological and molecular techniques i.e. 18S rDNA. DNA was isolated and amplified
using PCR. Gene sequencing was done and homology analysis was studied. Rate of
glucose oxidase production was also analysed.
Results: Glucose oxidase hyper producing isolate was identified as A. niger A247 strain.
This strain gave best reproducible results (145.22 ±0.034 U/g of cell mass) after 72 hrs of
fermentation at 30ºC and at a medium pH of 7.2.
Conclusion: Our results indicate the natural ability of A. niger to produce Glucose
oxidase in large quantity instead of using genetic manipulation techniques.
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Keywords
Glucose oxidase, Aspergillus niger, Hyper producer, 18S r DNA, Enzyme
Citation
Haq Ikram Ul, Nawaz Ali, Mukhtar Hamid, Ahmed Waseem. Isolation and Identification of Glucose Oxidase Hyper Producing Strain of Aspergillus niger. British Microbiology Research Journal. 2014 Feb; 4(2): 195-205.