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Isolation and Structural Characterization of Coryxin, a Novel Cyclic Lipopeptide From Corynebacterium Xerosis Ns5 Having Emulsifying and Anti-Biofilm Activity Publisher Pubmed



Dalili D1 ; Amini M2 ; Faramarzi MA3 ; Fazeli MR1 ; Khoshayand MR1 ; Samadi N1
Authors
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Authors Affiliations
  1. 1. Department of Drug and Food Control, Faculty of Pharmacy and Pharmaceutical Quality Assurance Research Center, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Department of Medicinal Chemistry, Faculty of Pharmacy and Drug Design and Development Research Center, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Pharmaceutical Biotechnology, Faculty of Pharmacy and Biotechnology Research Center, Tehran University of Medical Sciences, Tehran, Iran

Source: Colloids and Surfaces B: Biointerfaces Published:2015


Abstract

Herein we reported the structure and several properties of a new biosurfactants produced by Corynebacterium xerosis strain NS5. This strain was capable of producing a novel lipopeptide biosurfactant that we have named coryxin. The biosurfactant structure was characterized by using Fourier transform infrared spectroscopy (FTIR), Nuclear magnetic resonance spectroscopy (NMR), and Liquid chromatography-mass spectrometry (LC-MS). It contained a hydrophobic moiety of 3-hydroxydecanoic acid and a peptide part predicted as a sequence of seven amino acids including Asn-Arg-Asn-Gln-Pro-Asn-Ser. Coryxin lowered the surface tension of water to 31.4. mN/m, with a critical micelle concentration of 25 mg/l. It was a strong emulsifier with an emulsification index of 61% against n-hexane. Coryxin showed antibacterial activity against test organisms belonging to Gram-positive and Gram-negative bacteria and disrupted preformed biofilms of Staphylococcus aureus (82.5%). , Streptococcus mutans (80%), Escherichia coli (66%) and Pseudomonas aeruginosa (30%). In conclusion, microbial surfactant from C. xerosis exhibited inhibitory and disruptive activities against biofilm formation that could be of use in biofilm-related menace. © 2015 Elsevier B.V.