Novel plasmalogalactosylalkylglycerol from equine brain.

The research article discusses the isolation of a new type of galactosylalkylglycerol from horse brain tissue. This unique molecule has a long-chain cyclic acetal modification and its structure was determined through various chemical analysis techniques.

Isolation of novel molecules

• The novel molecule, officially named 3-O-(4’6′-plasmalogalactosyl) 1-O-alkylglycerol, was isolated from horse (equine) brain tissue. This type of molecule is unique due to the fact it is modified with a long-chain cyclic acetal at the sugar component.

Analysis of molecular structure

• The structure of the novel molecule was determined using proton nuclear magnetic resonance (NMR) spectroscopy, fast-atom bombardment-mass spectrometry, gas chromatography-mass spectrometry, and gas-liquid chromatography.
• These methods allowed the researchers to pinpoint the location and existence of the cyclic acetal linkage, the point at which this linkage was attached, and the specific length of the acetal chain.

Comparison with synthesized molecules

• To further understand the structure of the new molecule, a plasmalo derivative was created in a laboratory setting. This synthetic molecule was formed from 3-O-galactosyl 2-O-acyl 1-O-alkyl glyceride, and was acetalized after deacylation.
• When the NMR data of the synthesized plasmalo derivative was compared to the natural plasmalo lipid, the researchers were able to characterize the acetal chain in the latter as an “endo”-type 4′,6′-O-acetal derivative that was linked to galactoside.

Characteristics of the novel molecule

• The scientists determined the lengths of the alkyl and acetal groups in the novel molecule to be C(14) and C(16) and C(18) respectively, with the acetal group lengths mostly matching those of plasmalogalactosyl ceramide, another molecule previously isolated from equine brain tissue.