title: Characterization of new types of mannosylerythritol lipids as biosurfactants produced from soybean oil by a basidiomycetous yeast, Pseudozyma shanxiensis.
abstract: Mannosylerythritol lipids (MELs) are glycolipid biosurfactants produced by the yeast strains of the genus Pseudozyma. These show not only the excellent surface-active properties but also versatile biochemical actions. In course of MEL production from soybean oil by P. shanxiensis, new extracellular glycolipids (more hydrophilic than the previously reported MELs) were found in the culture medium. As a result of the structural characterization, the glycolipids were identified as a mixture of 4-O-[(2', 4'-di-O-acetyl-3'-O-alka(e)noyl)-beta-D-mannopyranosyl]-D-erythritol and 4-O-[(4'-O-acetyl-3'-O-alka(e)noyl-2'-O-butanoyl)-beta-D-mannopyranosyl]-D-erythritol. Interestingly, the new MELs possessed a much shorter chain (C(2) or C(4)) at the C-2' position of the mannose moiety compared to the MELs hitherto reported, which mainly possess a medium-chain acid (C(10)) at the position. They would thus show higher hydrophilicity and/or water-solubility, and expand the development of the environmentally advanced yeast biosurfactants.
authors: Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central, Tsukuba, Ibaraki, Japan.
authors: Tokuma
authors: T
authors: Fukuoka
authors: Tomotake
authors: T
authors: Morita
authors: Masaaki
authors: M
authors: Konishi
authors: Tomohiro
authors: T
authors: Imura
authors: Dai
authors: D
authors: Kitamoto
mesh_terms: D001487:Basidiomycota / Q000378:metabolism*; D004187:Disaccharides / Q000737:chemistry*; D006017:Glycolipids / Q000737:chemistry* / Q000145:classification*; D012995:Solubility; D013024:Soybean Oil / Q000737:chemistry* / Q000378:metabolism*; D013501:Surface-Active Agents / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D004187:Disaccharides; D006017:Glycolipids; D013501:Surface-Active Agents; C439671:mannosylerythritol lipid; D014867:Water; D013024:Soybean Oil