Dynamic behavior of tea catechins interacting with lipid membranes as determined by NMR spectroscopy

Yoshinori Uekusa, Miya Kamihira, Tsutomu Nakayama

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

Interaction between tea catechins, such as epicatechin gallate (ECg) and epigallocatechin gallate (EGCg), and isotropic bicelle model lipid membranes was investigated by solution NMR techniques. 1H NMR measurements provided signals from the B-ring and the galloyl moiety in ECg and EGCg that were obviously shifted, and whose proton T1 relaxation times were shortened upon interaction of the catechins with the bicelles. These results indicate that the B-ring and the galloyl moiety play an important role in this interaction. Nuclear Overhauser effect spectrometry experiments demonstrated that the B-ring and the galloyl moiety are located near the γ-H in the phospholipid trimethylammonium group. On the basis of these findings, we propose that ECg and EGCg interact with the surface of lipid membranes via the choline moiety.

Original languageEnglish
Pages (from-to)9986-9992
Number of pages7
JournalJournal of agricultural and food chemistry
Volume55
Issue number24
DOIs
Publication statusPublished - 2007 Nov 28
Externally publishedYes

Keywords

  • Isotropic bicelle
  • Lipid membrane
  • Solution NMR
  • Tea catechins

ASJC Scopus subject areas

  • Chemistry(all)
  • Agricultural and Biological Sciences(all)

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