Purification and characterization of a novel biosurfactant produced by <Emphasis Type="Italic">Bacillus licheniformis</Emphasis> MS3 |
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| Authors: | D Biria E Maghsoudi R Roostaazad H Dadafarin A Sahebghadam Lotfi M A Amoozegar |
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| Institution: | 1.Department of Chemical and Petroleum Engineering,Sharif University of Technology,Tehran,Iran;2.Department of Civil Engineering,école Polytechnique University,Montreal,Canada;3.Department of Chemical Engineering,McGill University,Montreal,Canada;4.Center for Genetic Engineering and Biotechnology,Tehran,Iran;5.Department of Biology, Faculty of Science,Tehran University,Tehran,Iran |
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| Abstract: | The physical properties and chemical structure of a new biosurfactant (licheniformin) produced by Bacillus licheniformis MS3 were investigated. The purified biosurfactant was identified as a lipopeptide with amino acid sequence of Gly, Ala, Val,
Asp, Ser, Gly, Tyr and a lactone linkage between the carboxyl group of Aspargine and hydroxyl group of Tyrosine residue. The
fatty acid moiety was attached to N-terminal amino acid residue through an amide bond. The purified licheniformin could lower
the surface tension of water from 72 to 38 mN/m at concentrations higher than 15 μg/mL and its relative emulsion volume (EV%)
was equal to 36%. It also showed stable surface activity over a wide range of temperature (45–85°C) and pH (3–11). |
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