Direct evidence of interaction of a green tea polyphenol, epigallocatechin gallate, with lipid bilayers by solid-state Nuclear Magnetic Resonance.
The interaction of a tea catechin, epigallocatechin gallate (EGCg), with the model membrane of dimyristoylphosphatidylcholine (DMPC) was studied by solid-state (31)P and (2)H NMR. The (31)P chemical shift anisotropy of the DMPC phosphate group decreased on addition of EGCg. The (2)H NMR spectrum of [4-(2)H]EGCg, which is deuterated at the 4-position, in the DMPC liposomes gave deuterium nuclei with much smaller quadrupole splittings than those in the solid phase. These (31)P and (2)H NMR observations provide direct experimental evidence that the EGCg molecule interacts with the lipid bilayers.
Kumazawa
Shigenori
S
Laboratory of Functional Food Science and COE Program in the 21st Century, School of Food and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Shizuoka 422-8526, Japan.
Kajiya
Katsuko
K
Naito
Akira
A
Saito
Hazime
H
Tuzi
Satoru
S
Tanio
Michikazu
M
Suzuki
Masayuki
M
Nanjo
Fumio
F
Suzuki
Eri
E
Nakayama
Tsutomu
T
D002392:Catechin / Q000031:analogs & derivatives* / Q000737:chemistry*; D003903:Deuterium / Q000737:chemistry; D004134:Dimyristoylphosphatidylcholine / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry*; D008051:Lipid Bilayers / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010636:Phenols / Q000737:chemistry*; D059808:Polyphenols; D013662:Tea / Q000737:chemistry*
D005419:Flavonoids; D008051:Lipid Bilayers; D010636:Phenols; D059808:Polyphenols; D013662:Tea; D002392:Catechin; D003903:Deuterium; C045651:epigallocatechin gallate; D004134:Dimyristoylphosphatidylcholine