Journal
MICROBIOLOGICAL RESEARCH
Volume 194, Issue -, Pages 1-9Publisher
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.micres.2016.10.005
Keywords
Aneurinibacillus aneurinilyticus; Lipopeptide; Biosurfactant; Emulsification; Antimicrobial; Oil recovery
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Funding
- Annamalai University, Tamil Nadu, India
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Biosurfactants are microbial-derived amphiphilic molecules having hydrophobic and hydrophilic moieties produced by bacteria, fungi, yeasts and algae and are extracellular or cell wall-associated compounds. In an ongoing survey for bioactive microbial metabolites from microbes isolated from diverse ecological niches, a new lipopeptide biosurfactant was identified from a marine bacterium; Aneurinibacillus aneurinilyticus strain SBP-11, which was isolated from a marine diversity hotspot, Gulf of Mannar, India. A new lipopeptide biosurfactant was purified and characterized based on TLC, FT-IR, NMR, GC-MS, HPLC, MALDI-TOF-MS and tandem MS analysis as Stearic acid-Thr-Tyr-Val-Ser-Tyr-Thr (named as Aneurinifactin). The critical micelle concentration of Aneurinifactin was 26 mg L-1 at a surface tension of 26 mN m(-1). Further, the biosurfactant showed stable emulsification at a wide range of pH (2-9) and temperature up to 80 degrees C. Aneurinifactin showed promising antimicrobial activity and concentration dependent efficient oil recovery. This is the first report on Aneurinifactin, a lipopeptide biosurfactant produced by a marine A. aneurinilyticus SBP-11, which could be explored as a promising candidate for use in various biomedical and industrial applications. (C) 2016 Elsevier GmbH. All rights reserved.
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