Inhibition of pectin methyl esterase activity by green tea catechins

被引：66

作者：

Lewis, Kristin C. ^{[1
]}

Selzer, Tzvia ^{[2
]}

Shahar, Chen ^{[2
]}

Udi, Yael ^{[2
]}

Tworowski, Dmitry ^{[2
]}

Sagi, Irit ^{[2
]}

机构：

[1] Rowland Inst Harvard, Cambridge, MA 02141 USA

[2] Weizmann Inst Sci, Dept Biol Struct, IL-76100 Rehovot, Israel

来源：

PHYTOCHEMISTRY | 2008年 / 69卷 / 14期

基金：

以色列科学基金会;

关键词：

Camellia sinensis; Theaceae; Green tea; Cuscuta pentagona; Cuscutaceae; Dodder; Castilleja indivisa; Orobanchaceae; Entireleaf Indian paintbrush; Cell wall degrading enzymes; Inhibition; Parasitism; Pectin methyl esterase; Catechins; Epigallocatechin gallate;

D O I：

10.1016/j.phytochem.2008.08.012

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Pectin methyl esterases (PMEs) and their endogenous inhibitors are involved in the regulation of many processes in plant physiology, ranging from tissue growth and fruit ripening to parasitic plant haustorial formation and host invasion. Thus, control of PME activity is critical for enhancing our understanding of plant physiological processes and regulation. Here, we report on the identification of epigallocatechin gallate (EGCG), a green tea component, as a natural inhibitor for pectin methyl esterases. In a gel assay for PME activity, EGCG blocked esterase activity of pure PME as well as PME extracts from citrus and from parasitic plants. Fluorometric tests were used to determine the IC50 for a synthetic substrate. Molecular docking analysis of PME and EGCG suggests close interaction of EGCG with the catalytic cleft of PME. Inhibition of PME by the green tea compound, EGCG, provides the means to study the diverse roles of PMEs in cell wall metabolism and plant development. In addition, this study introduces the use of EGCG as natural product to be used in the food industry and agriculture. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2586 / 2592

页数：7

共 42 条

[1] Green tea polyphenol epigallocatechin-3-gallate (EGCG) differentially inhibits interleukin-1β-induced expression of matrix metalloproteinase-1 and-13 in human chondrocytes [J].