High-pressure infrared spectroscopic evidence of water binding sites in 1,2-diacyl phospholipids

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DOIResolve DOI: http://doi.org/10.1016/0009-3084(88)90024-2
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TypeArticle
Journal titleChemistry and Physics of Lipids
ISSN00093084
Volume46
Issue3
Pages213224
Subjectwater binding; hydrogen bond; lipids; infrared spectra; high pressure
AbstractThe sites of water binding in L-1,2-diacylphosphatidylcholines (l-DPPC) were investigated by infrared spectroscopic methods. Evidence is provided that water molecules in fully hydrated samples, and the crystallation water in solid samples, are hydrogen-bonded to the phosphate oxygen atoms of the PO₂⁻ group in the head moiety, as well as to the ester C=O group of the sn-2 acyl chain in the interfacial region. The results indicate that no hydrogen-bonding occurs between water molecules and the ester C=O group of the sn-1 acyl chain of L-1,2-dipalmitoylphosphatidylethanolamine (L-DPPE), L-DPPC and L-1,2-dimyristoyl-phosphatidylcholine (L-DMPC). Although there is no hydrogen-bonding between water and the choline moiety, water molecules are attached to the (CH₃)₃N⁺ group by polar interactions.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedYes
NPARC number23001415
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Record identifierdb58463f-5692-4a38-91d3-e52c47ac714d
Record created2017-02-02
Record modified2017-02-02
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