Journal Article

Phylogenetic and biochemical characterization of the oil-producing yeast Lipomyces starkeyi

Masaki, Kazuo, Iefuji, Haruyuki, Oguri, Emiko, Naganuma, Takafumi

2012

Overview

Lipomyces starkeyi is an oleaginous yeast, and has been classified in four distinct groups, i.e., sensu stricto and custers α, β, and γ. Recently, L. starkeyi clusters α, β, and γ were recognized independent species, Lipomyces mesembrius, Lipomyces doorenjongii, and Lipomyces kockii, respectively. In this study, we investigated phylogenetic relationships within L. starkeyi, including 18 Japanese wild strains, and its related species, based on internal transcribed spacer sequences and evaluated biochemical characters which reflected the phylogenetic tree. Phylogenetic analysis showed that most of Japanese wild strains formed one clade and this clade is more closely related to L. starkeyi s.s. clade including one Japanese wild strain than other clades. Only three Japanese wild strains were genetically distinct from L. starkeyi. Lipomyces mesembrius and L. doorenjongii shared one clade, while L. kockii was genetically distinct from the other three species. Strains in L. starkeyi s.s. clade converted six sugars, D: -glucose, D: -xylose, L: -arabinose, D: -galactose, D: -mannose, and D: -cellobiose to produce high total lipid yields. The Japanese wild strains in subclades B, C, and D converted D: -glucose, D: -galactose, and D: -mannose to produce high total lipid yields. Lipomyces mesembrius was divided into two subclades. Lipomyces mesembrius CBS 7737 converted D: -xylose, L: -arabinose, D: -galactose, and D: -cellobiose, while the other L. mesembrius strains did not. Lipomyces doorenjongii converted all the sugars except D: -cellobiose. In comparison to L. starkeyi, L. mesembrius, and L. doorenjongii, L. kockii produced higher total lipid yields from D: -glucose, D: -galactose, and D: -mannose. The type of sugar converted depended on the subclade classification elucidated in this study.

• Publisher: Springer-Verlag,Springer Netherlands,Springer,Springer Nature B.V
• Subject: Biochemistry / Biological and medical sciences / Biomedical and Life Sciences / Classification / D-Galactose / Fundamental and applied biological sciences. Psychology / Genetics / Glucose / internal transcribed spacers / isolation & purification / Japan / L-Arabinose / Life Sciences / Lipids / Lipomyces / Lipomyces - classification / Lipomyces - genetics / Lipomyces - isolation & purification / Lipomyces - metabolism / Lipomyces starkeyi / Mannose / Medical Microbiology / metabolism / Microbiology / Miscellaneous / Molecular Sequence Data / Monosaccharides / Monosaccharides - metabolism / Mycological Typing Techniques / Mycology / Oils / Oils - metabolism / Original Paper / Phylogeny / plant biochemistry / Plant Sciences / Soil Science & Conservation / Spacer / strains / Sugar / sugars / Yeast / Yeasts