Demetalation of Chlorophyll Pigments
Demetalation of Chlorophyll Pigments
复制标题
叶绿素色素的脱金属
DOI：
10.1002/cbdv.201100435
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Y. Saga
中科院分区：
文献类型：
--
作者：
Y. Saga;A. Maruko;K. Sadaoka;N. Takahashi;Y. Saga
天然叶绿素（Chls）和细菌叶绿素（BChls）是光合作用的主要色素，它们的环四吡罗大环中有一个中心的Mg（或Zn）。从叶绿素色素中去除中心金属原子，称为叶绿素化，是一个重要的生物学反应，因为它允许光系统II（‐型）反应中心产生初级电子受体，是Chl降解途径的关键步骤之一。从维持蔬菜和水果的颜色水平和消费者评价的角度来看，蔬菜和水果加工和采后食品中的叶绿素化引起了农业和食品化学领域的广泛关注。本文就叶绿素色素的体内脱金属反应及脱金属产物作一综述。此外，本文还综述了天然(B)Chl分子及其合成类似物在酸性条件下体外脱金属的动力学研究。
Natural chlorophylls (Chls) and bacteriochlorophyll (BChls), which are major pigments in photosynthesis, possess a central Mg (or Zn) in their cyclic tetrapyrrole macrocycles. Removal of the central metal atom from chlorophyllous pigments, called pheophytinization, is a biologically important reaction in that it allows production of the primary electron acceptors in photosystem II(‐type) reaction centers and is one of the crucial steps in the Chl degradation pathway. Pheophytinization in processed and postharvest foods derived from vegetables and fruits has attracted considerable attention in agricultural and food chemistry from the viewpoints of maintenance of their color level and evaluation by consumers. In this review, we focus onin vivodemetalation reactions and demetalated products of chlorophyllous pigments. In addition, we summarize kinetic studies onin vitrodemetalation of natural (B)Chl molecules and their synthetic analogs under acidic conditions.