Studies on Characteristic of Extracellular L–Glutaminase and Identification of L-Glutaminase Producing Bacterial Strain from Cattle Feeding Farm of Chhatrapati Sambhajinagar, Maharashtra State, India

Abstract

L-glutaminase is gaining marked importance due to its potential clinical applications. A variety of microorganisms, including bacteria, yeast, and lamentous fungi, from soil habitat have been reported to produce L-glutaminase. The present investigation was carried out to isolate and screening of L-glutamiase producing bacteria from soil samples of cattle feeding sites. Among twenty three soil samples of cattle feeding farms around Aurangabad, nineteen bacteria’s were isolated. From that one isolate (AGT-19) that showed significant L-glutaminase activity. Morphological characteristics and 16S rRNA sequencing were used for phylogenetic analysis to identified strain AGT-19 as Kurthia gibsonii. Moreover, Kurthia gibsonii was grown in a medium containing 2.5% succinate and 2.5% L-glutamine showed significant activity of L-glutaminase (0.079 U/mg). The optimum conditions for L-glutaminase production were temperature was 39°C and pH was 7.0. The present isolation of K. gibsonii from cattle feeding site indicated that this bacterium is suitably adapted to the environment of excretion and to point of forming a microbiota in the fecal product. It revealed that soil of cattle feeding farm has diverse bacterial strains and its habitat nature allowed the bacteria expressed the protease activity.