J. Lipid Res.
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A more recent version of this article appeared on August 1, 2007

Papers In Press, published online ahead of print May 22, 2007
J. Lipid Res., doi:10.1194/jlr.M700152-JLR200
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Submitted on March 29, 2007
Revised on May 11, 2007
Accepted on May 21, 2007

Structural elucidation of a novel phosphoglycolipid isolated from six species of Halomonas genus

Assunta Giordano, Filomena Monica Vella, Ida Romano, and Agata Gambacorta

Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, Pozzuoli (NA) 80078

Corresponding Author: agiordano{at}icmib.na.cnr.it

The structure of a new phosphoglycolipid from the halophilic Gram-negative bacteria Halomonas elongata ATCC 33173T, Halomonas eurihalina ATCC 49336T, Halomonas almeriensis CECT 7050T, strain Sharm (AM238662), Halomonas halophila DSM 4770T, and Halomonas salina ATCC 49509T, was elucidated by NMR and mass spectroscopy studies. In all the species examined, the polar lipid composition consisted of 1,2 diacylglycero-3-phosphorylethanolamine, 1,2 diacylglycero-3-phosphoryl-glycerol, bisphosphatidylglycerol and the new phosphoglycolipid PGL1. The structure of PGL1 was established to be 2-(alpha-D-glucopyranosyloxy)-3-hydroxy-propyl)-phosphatidyl diacylglicerol. C16:0;C18:1 and C16:0;C19cyclopropane are the most abundant acyl chains linked to the phosphatidylglycerol moiety of each isolated PGL1. All the species presenting the lipid PGL1 belong to Halomonas rRNA group 1, suggesting that the new phosphoglycolipid could be a chemotaxonomic marker of this phylogenetic group. Structural elucidation of a new phosphoglycolipid from six strains belonging to the Halomonas genus.


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