Journal
BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR AND CELL BIOLOGY OF LIPIDS
Volume 1831, Issue 6, Pages 1185-1190Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.bbalip.2013.03.005
Keywords
Glycolipid; Plasmalogen; Phosphoglycolipid; Solvent
Funding
- National Natural Science Foundation of China [31170079]
- program for New Century Excellent Talents in University
- State Scholarship Fund of China
- NIH [GM-069338]
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Two phosphorus-containing glycolipids have previously been observed in Clostridium acetobutylicum. We had shown that the concentration of one of them increases in response to increased unsaturation of the membrane lipid hydrocarbon chains, suggesting a potential role in the regulation of lipid polymorphism in this organism. Mass spectrometry shows that these glycolipids are ethanolamine phosphate (Etn-P)-containing derivatives of a mono- and di-glycosyldiradylglycerol. The content of both diglycosyldiradylglycerol and the Etn-P-monoglycosyldiradylglycerol, which increases upon increased unsaturation of the membrane, also increases upon addition of octanol to the medium. Thus, it appears that the Etn-P-monoglycosyldiradylglycerol along with the diglycosyldiradylglycerol may serve to stabilize the membrane bilayer during membrane stress caused by the presence of the solvents produced during fermentation. (C) 2013 Elsevier B.V. All rights reserved.
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