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Type: Artigo de periódico
Title: Structural characterization and biological properties of a lipopeptide surfactant produced by Bacillus subtilis on cassava wastewater medium
Author: Nitschke, M
Haddad, R
Costa, GN
Gilioli, R
Meurer, EC
Gatti, MSV
Eberlin, MN
Hoehr, NF
Pastore, GM
Abstract: Surface-active compound produced by Bacillus subtilis LB5a using cassava wastewater as substrate was isolated, purified. and chemically characterized, and its infrared spectrum revealed characteristic of lipopeptide. Peptide analysis revealed presence of glutamic acid, aspartic acid, valine, and leucine at 1:1:1.2:3.4, respectively. Electrospray ionization mass spectrometry showed biosurfactant was composed of homologous lipopeptide mixture, with that of molecular weight 1035 being the most abundant. Tandem mass spectrometry of each protonated molecules established the peptide sequence as R-Glu-Leu-Leu-Val-Asp-Leu-Leu. Isolated surfactant showed similar chemical composition and peptide sequence as that of commercial surfactin, although some differences in homologous distribution and presence of dimer molecules were detected. Preliminary biological evaluation demonstrated surfactant has potential as antiviral agent with broad spectrum of antibacterial activity.
Subject: biosurfactant
B. subtilis
cassava wastewater
Country: Coreia do Sul
Editor: Korean Society Food Science & Technology-kosfost
Citation: Food Science And Biotechnology. Korean Society Food Science & Technology-kosfost, v. 13, n. 5, n. 591, n. 596, 2004.
Rights: fechado
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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