The Open Microbiology Journal

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Purification and Properties of an Esterase from Bacillus licheniformis and it’s Application in Synthesis of Octyl Acetate

Kamal K. Bhardwaj1, Adarsh Dogra1, Smita Kapoor1, Akshita Mehta1, Reena Gupta1, *
1 Department of Biotechnology, Himachal Pradesh University, Summer Hill, Shimla-171005, India



Esterase plays a major role in the degradation of natural materials, industrial pollutants and also provides an immense contribution to the eco-friendly approaches in various industrial applications.


In the present study, extracellular esterase from bacterial isolate Bacillus licheniformis was purified, characterized and used in the synthesis of octyl acetate.


Purification of esterase from Bacillus licheniformis was achieved using Sephadex G-75 column chromatography. Gas chromatography was used to analyze the octyl acetate synthesis.


The enzyme was salted out using ammonium sulphate precipitation and 60-70% saturation gave maximum specific activity of the enzyme during precipitation. A purification fold of 6.46 and yield of 9.69% was achieved when esterase from Bacillus licheniformis was purified using Sephadex G-75 column chromatography. Native as well as SDS-PAGE analysis gave a single band of 42 kDa. This showed that the enzyme was purified to homogeneity and it was a monomer with molecular weight of 42 kDa. Biochemical characterization of the enzyme revealed that it had optimum temperature of 45°C in 0.1 M Tris-HCl buffer of pH 8.0. On optimizing different parameters, such as molar ratio of reactants, incubation time, temperature, and amount of protein, the % yield of octyl acetate was found to be 77.3%.


In this work, simple method was used to purify esterase and the enzyme was further used in producing esters/products of commercial value within a reasonably short period of 12 h with a maximum yield of 77.3%.

Keywords: Esterase, Bacillus licheniformis, Octyl acetate, p-NPA, Sephadex G-75, Tris-HCl.

Article Information

Identifiers and Pagination:

Year: 2020
Volume: 14
First Page: 113
Last Page: 121
Publisher Id: TOMICROJ-14-113
DOI: 10.2174/1874285802014010113

Article History:

Received Date: 30/12/2019
Revision Received Date: 02/03/2020
Acceptance Date: 05/03/2020
Electronic publication date: 05/06/2020
Collection year: 2020

© 2020 Bhardwaj et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: ( This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Biotechnology, Himachal Pradesh University, Summer Hill, Shimla- 171 005, India, Phone: 91- 177-2831948, Fax: 91- 177- 2831948, E-mail:

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