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Kinetic and modeling analyses of lactose‑hydrolyzing β‑galactosidase from Lactiplantibacillus plantarum GV54

  • Authors:
    • Mahanthesh Vasudha
    • Devaraja Gayathri
  • View Affiliations / Copyright

    Affiliations: Department of Studies in Microbiology, Davangere University, Davangere, Karnataka 577007, India
    Copyright: © Vasudha et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Article Number: 11
    |
    Published online on: January 31, 2023
       https://doi.org/10.3892/wasj.2023.188
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Abstract

The enzyme β‑galactosidase plays a very essential role in food and in the pharmaceutical industry. The aim of the present study was to identify the most effective lactic acid bacteria isolated from homemade fermented milk samples and screened for β‑galactosidase production using the substrate, 5‑bromo‑4‑chloro‑3‑indolyl β‑D‑galactopyranoside (X‑gal). For the optimization of the enzyme production with carbon and nitrogen sources, four lactic acid bacterial isolates were used. Of these, only the Lactiplantibacillus plantarum (L. plantarum) GV54 and L. plantarum GV64 isolates significantly increased the production of β‑galactosidase with lactose as the carbon source. Similar results were obtained when nitrogen sources, such as ammonium sulfate and beef extract were used. The extraction of β‑galactosidase using the toluene/acetone method and SDS‑PAGE were performed to determine the molecular weight. The L. plantarum GV54 isolate exhibited the maximum β‑galactosidase activity (162.960±0.36 Miller units) compared with the other isolates with O‑nitrophenyl‑β‑D‑galactopyranoside (ONPG) as the substrate. The β‑galactosidase activity was high at pH 7.0 and a temperature of 37˚C. In addition, Mg2+, Mn2+ and Fe2+ had an indirect effect on the activity of β‑galactosidase. The kinetic constant was found to be 27.37574 mM, and its maximum velocity was 0.259289 U/min for pure β‑galactosidase in relation to ONPG. Comparative modeling and structural annotation analysis were performed, and the structural comparison of β‑galactosidase enzyme from L. plantarum and the crystal structure of Bifidobactarum bifidium was also performed. It was observed that the isolated enzyme shared the highest degree of similarity. Considering these characteristics of β‑galactosidase isolated from L. plantarum GV54, this isolate may be a promising commercial enzyme for various industrial and other biotechnological applications.
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Spandidos Publications style
Vasudha M and Gayathri D: Kinetic and modeling analyses of lactose‑hydrolyzing β‑galactosidase from <em>Lactiplantibacillus plantarum</em> GV54. World Acad Sci J 5: 11, 2023.
APA
Vasudha, M., & Gayathri, D. (2023). Kinetic and modeling analyses of lactose‑hydrolyzing β‑galactosidase from <em>Lactiplantibacillus plantarum</em> GV54. World Academy of Sciences Journal, 5, 11. https://doi.org/10.3892/wasj.2023.188
MLA
Vasudha, M., Gayathri, D."Kinetic and modeling analyses of lactose‑hydrolyzing β‑galactosidase from <em>Lactiplantibacillus plantarum</em> GV54". World Academy of Sciences Journal 5.2 (2023): 11.
Chicago
Vasudha, M., Gayathri, D."Kinetic and modeling analyses of lactose‑hydrolyzing β‑galactosidase from <em>Lactiplantibacillus plantarum</em> GV54". World Academy of Sciences Journal 5, no. 2 (2023): 11. https://doi.org/10.3892/wasj.2023.188
Copy and paste a formatted citation
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Spandidos Publications style
Vasudha M and Gayathri D: Kinetic and modeling analyses of lactose‑hydrolyzing β‑galactosidase from <em>Lactiplantibacillus plantarum</em> GV54. World Acad Sci J 5: 11, 2023.
APA
Vasudha, M., & Gayathri, D. (2023). Kinetic and modeling analyses of lactose‑hydrolyzing β‑galactosidase from <em>Lactiplantibacillus plantarum</em> GV54. World Academy of Sciences Journal, 5, 11. https://doi.org/10.3892/wasj.2023.188
MLA
Vasudha, M., Gayathri, D."Kinetic and modeling analyses of lactose‑hydrolyzing β‑galactosidase from <em>Lactiplantibacillus plantarum</em> GV54". World Academy of Sciences Journal 5.2 (2023): 11.
Chicago
Vasudha, M., Gayathri, D."Kinetic and modeling analyses of lactose‑hydrolyzing β‑galactosidase from <em>Lactiplantibacillus plantarum</em> GV54". World Academy of Sciences Journal 5, no. 2 (2023): 11. https://doi.org/10.3892/wasj.2023.188
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