Recent overview of the Mg branch of the tetrapyrrole biosynthesis leading to chlorophylls

被引:0
作者
Tatsuru Masuda
机构
[1] The University of Tokyo,Graduate School of Arts and Sciences
来源
Photosynthesis Research | 2008年 / 96卷
关键词
Chlorophyll; Chloroplast; Mg branch; Tetrapyrrole; Photosynthesis;
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摘要
In plants, chlorophylls (chlorophyll a and chlorophyll b) are the most abundant tetrapyrrole molecules and are essential for photosynthesis. The first committed step of chlorophyll biosynthesis is the insertion of Mg2+ into protoporphyrin IX, and thus subsequent steps of the biosynthesis are called the Mg branch. As the Mg branch in higher plants is complex, it was not until the last decade—after many years of intensive research—that most of the genes encoding the enzymes for the pathway were identified. Biochemical and molecular genetic analyses have certainly modified the classic metabolic map of tetrapyrrole biosynthesis, and only recently have the molecular mechanisms of regulatory pathways governing chlorophyll metabolism been elucidated. As a result, novel functions of tetrapyrroles and biosynthetic enzymes have been proposed. In this review, I summarize the recent findings on enzymes involved in the Mg branch, mainly in higher plants.
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页码:121 / 143
页数:22
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