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A more recent version of this article appeared on August 1, 2006

Papers In Press, published online ahead of print May 4, 2006
J. Lipid Res., doi:10.1194/jlr.M600034-JLR200
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Submitted on January 20, 2006
Revised on May 3, 2006
Accepted on May 3, 2006

Structural elucidation of phosphoglycolipids from strains of the bacterial thermophiles thermus and meiothermus

Yu-Liang Yang, Feng-Ling Yang, Su-Chuan Jao, Mao-Yen Chen, San-San Tsay, Wei Zou, and Shih-Hsiung Wu

Institute of Biological Chemistry, Academia Sinica, Taipei 115

Corresponding Author: shwu{at}gate.sinica.edu.tw

The structures of two major phosphoglycolipids from the thermophilic bacteria Thermus oshimai NTU-063, Thermus thermophilus NTU-077, Meiothermus ruber NTU-124, and Meiothermus taiwanensis NTU-220 were determined using spectroscopic and chemical analyses to be 2'-O-(1,2-diacyl-sn-glycero-3-phospho) -3'-O-(alpha -N-acetylglucosaminyl)-N-glyceroyl alkylamine (PGL1, 1) and the novel structure 2'-O-(2-acylalkyldio-1-O-phospho)-3'-O-(alpha -N-acetylglucosaminyl)-N- glyceroyl alkylamine (PGL2, 2). PGL2 (2) is the first phosphoglycolipid identified with a 2-acylalkyldio-1-O-phosphate moiety. The fatty acids of the phosphoglycolipids are mainly iso-C15:0, -C16:0, and -C17:0, and anteiso-C15:0 and -C17:0. The ratios of PGL2 (2) to PGL1 (1) are significantly altered when grown in the different temperatures for three strains, Thermus thermophilus NTU-077, Meiothermus ruber NTU-124, and Meiothermus taiwanensis NTU-220, but except T. oshimai NTU-063. Accordingly the ratios of iso- to anteiso-branched fatty acids increase as grown in the higher temperature.


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