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Identification of bisphosphatidic acid and its plasmalogen analogues in the phospholipids of a marine bacterium

1975; American Society for Microbiology; Volume: 123; Issue: 1 Linguagem: Inglês

10.1128/jb.123.1.302-307.1975

1098-5530

D.J. McAllister, August J. De Siervo,

Metabolomics and Mass Spectrometry Studies

A relatively nonpolar unidentified phospholipid (phospholipid X) , isolated from the gram-negative marine bacterium MB 45, was characterized both chromatographically and by chemical analysis. Phospholipid X was shown to be an acidic phospholipid without vicinal hydroxyl, free-amino, or amide groups. The presence of O-alkenyl groups was indicated by a positive reaction for plasmalogen. Mild alkaline methanolysis of phospholipid X yielded only glycerophosphoryglycerol as the derivative. Acetolysis produced only diacyl-glycerol monoacetate. Clevage of O-alkenyl chains by methanolic hydrochloride resulted in the formation of three lyso derivatives. It was estimated that 18.2% of phospholipid X was plasmalogen. From these data, together with chromatographic comparisons with standards, infrared spectra, a molecular weight estimation, and the determination of the glycerol-phosphate-acyl ester ratio, it was concluded that phospholipid X was bisphosphatidic acid mixed with its plasmalogen analogues.